CN117205706B - On-line purification device of hydrogen for hydrogen-cooled generator - Google Patents
On-line purification device of hydrogen for hydrogen-cooled generator Download PDFInfo
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- CN117205706B CN117205706B CN202310908209.7A CN202310908209A CN117205706B CN 117205706 B CN117205706 B CN 117205706B CN 202310908209 A CN202310908209 A CN 202310908209A CN 117205706 B CN117205706 B CN 117205706B
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- 239000001257 hydrogen Substances 0.000 title claims abstract description 227
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 227
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 226
- 238000000746 purification Methods 0.000 title claims abstract description 164
- 239000007789 gas Substances 0.000 claims abstract description 141
- 238000010521 absorption reaction Methods 0.000 claims abstract description 134
- 238000011069 regeneration method Methods 0.000 claims abstract description 68
- 230000008929 regeneration Effects 0.000 claims abstract description 67
- 238000000926 separation method Methods 0.000 claims abstract description 59
- 239000012535 impurity Substances 0.000 claims abstract description 33
- 238000011045 prefiltration Methods 0.000 claims abstract description 32
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- 239000002912 waste gas Substances 0.000 claims description 24
- 238000005070 sampling Methods 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- 230000008569 process Effects 0.000 claims description 17
- 238000006073 displacement reaction Methods 0.000 claims description 14
- 239000000498 cooling water Substances 0.000 claims description 13
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- 238000004891 communication Methods 0.000 claims description 10
- 239000002808 molecular sieve Substances 0.000 claims description 10
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 9
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 9
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 5
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 5
- 239000003054 catalyst Substances 0.000 claims description 5
- 229910052744 lithium Inorganic materials 0.000 claims description 5
- 239000000741 silica gel Substances 0.000 claims description 5
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- 230000001276 controlling effect Effects 0.000 claims description 4
- JRTYPQGPARWINR-UHFFFAOYSA-N palladium platinum Chemical compound [Pd].[Pt] JRTYPQGPARWINR-UHFFFAOYSA-N 0.000 claims description 4
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- 150000002431 hydrogen Chemical class 0.000 description 6
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Landscapes
- Hydrogen, Water And Hydrids (AREA)
Abstract
An online purification device of hydrogen for a hydrogen-cooled generator comprises a circulating purification system, a circulating regeneration system and a control system: the circulating purification system comprises a pre-filter, a first purification absorption tower and a post-filter which are sequentially connected between a generator hydrogen outlet and a generator hydrogen inlet; the circulating regeneration system comprises a second purification absorption tower, a regenerated airflow cooler and an exhaust gas separation storage which are sequentially connected in a closed loop manner; the first purification absorption tower of the circulating purification system and the second purification absorption tower of the circulating regeneration system are in an operating state and a regeneration state respectively, and are in an operable interchange state. The invention can effectively ensure the hydrogen purity of the generator, has less hydrogen quantity carried when impurity gas is removed, reduces the waste of the hydrogen to the minimum, basically does not exhaust outwards when the hydrogen purity is high enough, has no hydrogen consumption, can operate on line for a long time, and ensures the higher hydrogen purity in the generator in real time.
Description
Technical Field
The invention relates to an online purification device of hydrogen for a hydrogen-cooled generator, belonging to the technical field of gas purification.
Background
It is well known that the purity of hydrogen gas significantly affects the operational safety and economy of the generator. China is in the section 1 of the electric industry safety working regulations: thermal and mechanical (gb 26164.1-2010) 13.4.2 specifies: the purity of the hydrogen of the generator should not be lower than 96.0 percent, and the oxygen content should not exceed l.2 percent. Exceeding the standard can lead to the possibility of hydrogen explosion of the generator, and seriously threaten the safety of the generator. The reduction in hydrogen purity will also directly affect the generator operating power consumption, e.g., 400mw generator losses will increase by 107kw per 1% reduction in hydrogen purity, 600mw and 800mw units will increase by 240kw and 366kw per 400mw generator losses. When the hydrogen purity is reduced from 99.99% to 97%, the 400mw generator losses are increased to 321kw,600mw and 800mw units respectively, and the losses are increased by 720kw and 1098kw.
At present, after hydrogen in a generator is used for a period of time, because the hydrogen is polluted by oil vapor and water vapor carrying air, the components become complex, a certain amount of H 2O、O2、CO2、N2、C2H4, C 3+ and other oil hydrocarbon components are contained, when the purity is insufficient, in order to maintain the high purity of the hydrogen in the generator, the hydrogen discharging and supplementing operation in a certain period is generally required to be carried out on the generator, and the hydrogen with low concentration is replaced by more than 99.99 percent of high-purity hydrogen, so that the purity of the hydrogen in the generator is relatively improved. The existing method for discharging unqualified hydrogen and supplementing qualified hydrogen can not discharge hydrogen and supplement hydrogen too frequently, so that the hydrogen purity of the generator can be ensured to be qualified, the hydrogen purity is difficult to be kept highest, and the generator efficiency is optimal.
In addition, some power plants adopt millions of imported membrane purification products which are very often priced to improve the hydrogen purity in the generator, and although the aim of improving the hydrogen purity of the generator can be achieved, the newly-added equipment occupies a large amount of space in a hydrogen drying loop, and the newly-added equipment together with equipment such as a hydrogen dryer, a hydrogen circulating fan and the like causes the system to be huge and complex, the replacement operation is difficult, the possible leakage points of hydrogen are more, the maintenance amount is large, and the potential safety hazard is greatly increased.
Disclosure of Invention
In order to overcome the defects of the related art, the invention provides the online purification device of the hydrogen for the hydrogen-cooled generator, which can effectively ensure the hydrogen purity of the generator, has less hydrogen carried in when impurity gas is removed, reduces the waste of the hydrogen to the minimum, basically does not exhaust outwards when the hydrogen purity is high enough, has no hydrogen consumption, can operate online for a long time and ensures the higher hydrogen purity in the generator in real time.
The technical scheme adopted for solving the technical problems is as follows:
An on-line purification device for hydrogen for a hydrogen-cooled generator, comprising:
The circulating purification system comprises a pre-filter, a first purification absorption tower and a post-filter which are sequentially connected between a generator hydrogen outlet and a generator hydrogen inlet, wherein the first purification absorption tower is always in a working state for absorbing and purifying hydrogen when in operation, and the working state is used for purification of deoiling, deoxidizing, denitriding, decarbonizing and the like of the hydrogen;
the circulating regeneration system comprises a second purifying absorption tower, a regenerated airflow cooler and an exhaust gas separation storage which are sequentially connected in a closed loop, wherein the second purifying absorption tower is always in a regeneration state when in operation, and the regeneration state is used for removing impurity gas by TSA and separating and discharging the impurity gas;
the working states of the first purification absorption tower of the circulating purification system and the second purification absorption tower of the circulating regeneration system are operatively interchanged and are respectively in a working state and a regeneration state;
The control system is respectively connected with the circulating purification system and the circulating regeneration system and is used for regulating and controlling the automatic absorption purification process of the circulating purification system and the automatic circulating regeneration process of the circulating regeneration system.
Optionally, two ends of the first purification absorption tower are connected with the post-filter and the pre-filter through an upper four-way valve and a lower four-way valve respectively; two ends of the second purification absorption tower are respectively connected with the regenerated airflow cooler and the waste gas separation storage through an upper four-way valve and a lower four-way valve; the valve rods of the upper four-way valve and the lower four-way valve are operated to synchronously rotate for 90 degrees, so that the connection relation between the first purification absorption tower and the second purification absorption tower can be exchanged; the valve rods of the upper four-way valve and the lower four-way valve are connected through a connecting rod and a pneumatic actuator, and are used for realizing synchronous operation of the two valve rods.
Optionally, the first purification absorption tower comprises an absorption tower body, an adsorbent bed layer and a high-pressure air blower are arranged in the absorption tower body, the adsorbent bed layer comprises an activated carbon bed layer, a silica gel octyl bed layer, a lithium-based molecular sieve bed layer, a sodium-based molecular sieve bed layer and a deoxidization bed layer which are sequentially connected from bottom to top, and the deoxidization bed layer is filled with a palladium-platinum catalyst and a dry adsorbent; a heater is buried in the adsorbent bed layer, and the heater and the high-pressure air blower are started in the automatic cycle regeneration process;
The absorption tower body is provided with a first temperature gauge and a first pressure gauge, the upper part of the absorption tower body is provided with a working air flow outlet pipeline connected with an upper four-way valve, and the bottom of the absorption tower body is provided with a working air flow inlet pipeline connected with a lower four-way valve;
The second purification absorption tower has the same structure as the first purification absorption tower and is provided with a second temperature gauge and a second pressure gauge;
Simultaneously, the upper four-way valve is also connected with the regenerated airflow cooler and the post filter through a regenerated airflow outlet pipeline and a post filter inlet pipeline respectively; the regenerated gas outlet pipeline is also provided with a regenerated gas flow control valve V1 and a third temperature meter; the lower four-way valve is also connected with the waste gas separation storage and the prefilter through a regenerated gas inflow port pipeline and a prefilter outlet pipeline respectively.
Optionally, the pre-filter comprises a filter shell, a spiral channel and a gas lift pipe, wherein the spiral channel and the gas lift pipe are arranged in the filter shell, a gas inlet and a gas outlet are formed in the filter shell, the gas inlet end of the spiral channel is connected with the gas inlet, the center of the gas outlet end of the spiral channel is connected with the gas inlet of the gas lift pipe, the gas outlet of the gas lift pipe is communicated with the gas outlet, and a sintering filter layer made of metal is filled in the gas lift pipe; a sewage pipeline is also communicated between the filter shell and the sewage inlet, and two sewage control valves connected in series are arranged on the sewage pipeline;
The post-filter has the same structure as the pre-filter.
Optionally, a hydrogen inlet humidity detector and a hydrogen flow meter are arranged on an input pipeline between the pre-filter and the first purification absorption tower; a hydrogen outlet humidity detector and a hydrogen purity measurer are arranged on an output pipeline between the post filter and the first purification absorption tower, and the hydrogen purity measurer is used for measuring the purity of the hydrogen absorbed by the absorption tower;
A communication bypass is arranged between the output end of the front filter and the input end of the rear filter, and a first electromagnetic valve is arranged on the communication bypass; when the hydrogen humidity data of the hydrogen humidity detector and the hydrogen outlet humidity detector are smaller than the set data, the first electromagnetic valve is opened, the communication bypass is conducted, the dehumidification stopping state is entered, the regeneration operation is continued to be completed, and the first purification absorption tower and the second purification absorption tower are not switched;
when the hydrogen flow data of the hydrogen flow measuring instrument is larger than the normal data, the function of a circulating fan is not needed, and the corresponding high-pressure air blower is started only in a regeneration state; when the hydrogen flow data of the hydrogen flow measuring instrument is smaller than the normal data, the circulating fan is needed, and the corresponding high-pressure air blower is started in the absorption state.
Optionally, the regeneration air flow cooler comprises a cooler main body, one side of the cooler main body is respectively provided with a cooling water inlet and a cooling water outlet, one end, close to the cooling water outlet, of the cooler main body is connected with the upper four-way valve, one end, close to the cooling water inlet, of the cooler main body is connected with the waste gas separation storage, and a fourth temperature meter is installed between the cooler main body and the waste gas separation storage.
Optionally, the waste gas separation storage comprises an equipment shell, wherein a storage chamber, a separation chamber and a sedimentation chamber which are sequentially communicated are arranged in the equipment shell, a cyclone channel is arranged in the separation chamber and is communicated with the cooler main body, the cyclone channel is communicated with the storage chamber through a central riser, and a macromolecule separation membrane is arranged in the central riser; the storage chamber is positioned above the separation chamber and is connected with the lower four-way valve; the sedimentation chamber is provided with an exhaust gas hydrogen content measuring instrument, an exhaust gas automatic discharge pipeline and an automatic drainage pipeline, wherein the exhaust gas automatic discharge pipeline is sequentially provided with an exhaust control valve, a second electromagnetic valve and a discharge measuring instrument, and the automatic drainage pipeline is sequentially provided with a drainage control valve, a water storage cylinder and a micro-flow measuring instrument.
Optionally, the control system includes the PLC controller and respectively with man-machine interface touch-sensitive screen and the warning pilot lamp that PLC control is connected, the PLC controller still respectively electric connection in first solenoid valve, second solenoid valve, first manometer, second manometer, hydrogen flow measuring instrument, emission measuring instrument, micro-flowmeter measuring instrument, advance hydrogen humidity detector, go out hydrogen humidity detector, hydrogen purity caliber, first temperature measuring instrument, second temperature measuring instrument, third temperature measuring instrument, fourth temperature measuring instrument, absorption tower, separator, cooler, filter, pneumatic actuator.
Optionally, the hydrogen purification device further comprises a gas replacement operation system, the gas replacement operation system comprises a replacement inlet and a replacement outlet, one end of the replacement inlet is connected with the side, close to the lower four-way valve, of the regenerated gas inflow port pipeline, the other end of the replacement inlet is connected to the carbon dioxide supply place through the replacement inlet pipeline, and the replacement inlet pipeline is provided with a replacement inlet valve; one end of the replacement outlet is connected with the side, close to the waste gas separation storage, of the regenerated gas inflow port pipeline, the other end of the replacement outlet is connected to a gas discharge position through a replacement outlet pipeline, and a replacement outlet valve is arranged on the replacement outlet pipeline; the regenerated gas inlet pipeline between the replacement inlet and the replacement outlet is also provided with a replacement separation valve, the position of the outlet pipeline of the pre-filter, which is close to the lower four-way valve, is provided with a pressure balance valve, and one end of the pressure balance valve, which is connected with the lower four-way valve, is simultaneously connected with the regenerated gas inlet pipeline.
Optionally, the hydrogen purification device further comprises a hydrogen purity measurement system, the hydrogen purity measurement system comprises a hydrogen purity monitor, the hydrogen purity monitor is connected with two ends of the first purification absorption tower through an inlet sampling pipeline and an outlet sampling pipeline respectively, and a first sampling control valve and a second sampling control valve are arranged on the inlet sampling pipeline and the outlet sampling pipeline respectively.
Compared with the related art, the online purification device of the hydrogen for the hydrogen-cooled generator provided by the invention has the following technical advantages:
On one hand, the on-line purification device provided by the invention is provided with the control system, the circulating purification system and the circulating regeneration system, and on the other hand, the functions of hydrogen drying, purification, hydrogen autonomous circulation and the like are concentrated into one set of automatic equipment, and the functions complement each other and are mutually utilized, so that a large amount of equipment installation space is saved, equipment is simplified, the cost is greatly reduced, the use, the operation and the maintenance are convenient, and the potential safety hazard is not increased. On the other hand, the waste gas separation storage of the recycling regeneration system can be used for separating and discharging impurity gas with little hydrogen content, so that the waste of hydrogen is reduced to the minimum, and basically no more hydrogen is discharged outwards when the purity of the hydrogen is high enough, and no hydrogen is consumed, so that the device can operate on line for a long time, and the high purity of the hydrogen in the generator is ensured in real time. On the other hand, the first purification absorption tower of the circulating purification system can improve the performance of 1-2 percent of hydrogen purity, thereby greatly reducing or basically avoiding the situation of hydrogen discharge caused by unqualified hydrogen purity; the TSA mode of the second purifying and absorbing tower of the circulating regeneration system is utilized to remove impurity gas, hydrogen is not consumed to regenerate the adsorbent, the process is alternately repeated, uninterrupted online hydrogen purification work is maintained, and the purity of hydrogen in the generator is ensured to be always higher.
Drawings
The invention will be further described with reference to the drawings and examples.
Fig. 1 is a schematic structural diagram of an on-line purification apparatus for hydrogen for a hydrogen-cooled generator according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of the structure of a pre-filter in an on-line purification apparatus of hydrogen for a hydrogen-cooled generator according to an embodiment of the present invention.
Fig. 3 is a schematic diagram showing the structure of an exhaust gas separation storage in an on-line purification apparatus of hydrogen for a hydrogen-cooled generator according to an embodiment of the present invention.
Fig. 4 to 6 are block diagrams of monitoring flow involved in the use process of the on-line purification device of hydrogen for hydrogen-cooled generator according to one embodiment of the present invention.
Meaning of the symbols and signs in the drawings:
10-a cyclic purification system; 11-a pre-filter; 111-a filter housing; 112-helical channel; 113-a riser; 114-a sewage pipeline; 12-a first purification absorption column; 121-an absorber tower body; 122-adsorbent bed; 123-high pressure blower; 124-a heater; 125—working gas stream outlet line; 126—working gas stream inlet line; 127-1-regeneration gas flow outlet conduit; 127-2-post filter inlet line; a 128-1-regenerant gas inlet line; 128-2-prefilter outlet piping; 13-post-filter; 14-connecting rod; 15-a pneumatic actuator; 16-communication bypass;
20-a cyclic regeneration system; 21-a second purification absorber; 22-a regeneration gas stream cooler; 221-a cooler body; 23-an exhaust gas separation storage; 231-a device housing; 232-a storage chamber; 233-a separation chamber; 234-settling chamber; 235-spin-division channels; 236-a central riser; 2361-a polymer separation membrane; 237-an automatic exhaust line; 238-automatic drain line; 239-a water storage drum;
30-a control system; 31-a PLC controller; 32-a human-machine interface touch screen;
40-gas displacement operating system; 41-substitution inlet; 411-replacement inlet line; 42-displacement outlet; 421-displacement outlet line;
50-a hydrogen purity measurement system; 51-hydrogen purity monitor; 511-inlet sampling line; 512-outlet sampling line;
V1-an exhaust control valve; v2-a drain control valve; v3-displacing the divider valve; v4-a pressure balancing valve; v5-displacement outlet valve; v6-displacement inlet valve; v7-upper four-way valve; v8-a lower four-way valve; v9-a pollution discharge control valve; v10-a first sampling control valve; v11-a second sampling control valve; YV 1-first solenoid valve; YV 2-a second solenoid valve; p1-a first pressure gauge; p2-a second pressure gauge; p-compressed air pressure; f1-a hydrogen flow measuring instrument; f2-a micro-flowmeter; f3-an emission meter; m1-a hydrogen inlet humidity detector; m2-a hydrogen-yielding humidity detector; n1-hydrogen purity measurer; t1-a first temperature gauge; t2-a second temperature gauge; t3-a third temperature gauge; t4-fourth temperature gauge.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.
Fig. 1 to 3 are schematic structural views showing an on-line purifying apparatus for hydrogen for a hydrogen-cooled generator according to a preferred embodiment of the present invention, comprising:
The circulating purification system 10, wherein the circulating purification system 10 comprises a pre-filter 11, a first purification absorption tower 12 and a post-filter 13 which are sequentially connected between a generator hydrogen outlet and a generator hydrogen inlet, and the first purification absorption tower 12 is always in an operating state for absorbing and purifying hydrogen during operation, and the operating state is used for purifying deoiling, deoxidizing, denitrifying, decarbonating and the like of the hydrogen;
The circulating regeneration system 20, wherein the circulating regeneration system 20 comprises a second purifying absorption tower, a regenerated airflow cooler 22 and an exhaust gas separation storage 23 which are sequentially connected in a closed loop, the second purifying absorption tower is always in a regeneration state when in operation, and the regeneration state is used for removing impurity gas by TSA and separating and discharging the impurity gas;
The operation states of the first purification absorption tower 12 of the circulation purification system 10 and the second purification absorption tower of the circulation regeneration system 20 are operatively interchanged, that is, the position interchange is achieved through the operability, and the operation states and the regeneration states are respectively;
the control system 30 is connected with the circulating purification system 10 and the circulating regeneration system 20 respectively, and is used for regulating and controlling the automatic absorption purification process of the circulating purification system 10 and the automatic circulating regeneration process of the circulating regeneration system 20.
The online purification device of the embodiment of the invention is provided with two adsorption towers, namely a first purification absorption tower 12 and a second purification absorption tower 21, wherein one tower is always in a working state for adsorbing and purifying hydrogen gas when in operation, and is called a first purification absorption tower 12, and the other tower is always in a regeneration state, and is called a second purification absorption tower 21; the two towers alternately work to become the first purification absorption tower 12 and the second purification absorption tower 21 respectively, and each tower is subjected to three circulation processes of adsorption, heating and cooling each time, and circulation adsorption is completed when the tower is taken as the first purification absorption tower 12, and heating and cooling circulation is completed when the tower is taken as the second purification absorption tower 21, so that hydrogen in the generator is continuously purified.
Wherein, in the heating procedure of the automatic circulation regeneration process, the adsorbent regeneration under the condition of not consuming hydrogen is realized corresponding to the application of the temperature swing adsorption hydrogen purification technology. Meanwhile, the waste gas separation storage 23 is used in the automatic circulation regeneration process of the embodiment of the invention, so that impurity gas with little hydrogen content can be separated and discharged, the consumed hydrogen amount is very small, and when the purity of hydrogen in the generator is higher (no impurity gas), no gas is discharged, so that the automatic circulation regeneration process can run on line for a long time, collect the impurity gas in the hydrogen in the generator in real time, and practically ensure that the purity of the hydrogen in the generator is higher.
Essentially, the embodiment of the invention combines the equipment required by the online purification of the hydrogen and the drying of the hydrogen into one, utilizes the equipment, realizes the comprehensive utilization of resources, reduces the total equipment cost, reduces the total volume and the possible leakage of a hydrogen drying loop, is convenient for gas replacement operation and operation maintenance, and increases the economic benefit for a power plant.
In summary, the on-line purification device of hydrogen for hydrogen-cooled generator of this embodiment, through setting up circulation purification system 10, circulation regeneration system 20 and control system 30, realized the hydrogen purification function, can accomplish hydrogen drying, purification and hydrogen autonomous circulation, reached the performance that improves hydrogen purity 1-2 percentage, reduced by a wide margin or stopped the circumstances of hydrogen discharge because of hydrogen purity is unqualified, reached generator energy saving, efficiency increase, reduction carbon emission's purpose.
In an alternative implementation manner of the embodiment of the present invention, two ends of the first purification absorption tower 12 are connected to the post-filter 13 and the pre-filter 11 through an upper four-way valve V7 and a lower four-way valve V8, respectively; two ends of the second purifying absorption tower 21 are respectively connected with a regenerated airflow cooler 22 and an exhaust gas separation storage 23 through an upper four-way valve V7 and a lower four-way valve V8; the connection relation between the first purification absorption tower 12 and the second purification absorption tower 21 can be exchanged by operating the valve rods of the upper four-way valve V7 and the lower four-way valve V8 to synchronously rotate by 90 degrees; the valve rods of the upper four-way valve V7 and the lower four-way valve V8 are connected through a connecting rod 14 and a pneumatic actuator 15, so that synchronous operation of the two valve rods is realized, and the pneumatic actuator 15 is driven by compressed air pressure P.
In an alternative implementation manner of the embodiment of the present invention, the first purification absorption tower 12 includes an absorption tower body 121, an adsorbent bed 122 and a high-pressure blower 123 that are disposed up and down are disposed inside the absorption tower body 121, and the adsorbent bed 122 includes an activated carbon bed, a silica gel octyl bed, a lithium-based molecular sieve bed, a sodium-based molecular sieve bed and a deoxidizing bed that are sequentially connected from bottom to top, and the deoxidizing bed is filled with palladium-platinum catalyst and dry adsorbent; a heater 124 is buried in the adsorbent bed 122, and the heater 124 and the high-pressure blower 123 are started in the automatic cycle regeneration process;
the absorption tower body 121 is provided with a first temperature meter T1 and a first pressure meter P1, the upper part of the absorption tower body 121 is provided with a working air flow outlet pipeline 125 connected with an upper four-way valve V7, and the bottom of the absorption tower body 121 is provided with a working air flow inlet pipeline 126 connected with a lower four-way valve V8;
the second purifying absorption tower 21 has the same structure as the first purifying absorption tower 12 and is provided with a second temperature meter T2 and a second pressure meter P2;
Meanwhile, the upper four-way valve V7 is also connected with the regenerated gas flow cooler 22 and the post-filter 13 through a regenerated gas outflow pipeline 127-1 and a post-filter inlet pipeline 127-2 respectively; the regenerated gas outflow pipeline 127-1 is also provided with a regenerated gas flow control valve V1 and a third temperature meter T3; the lower four-way valve V8 is also connected to the exhaust gas separation reservoir 23 and the prefilter 11 via a regeneration gas inlet line 128-1 and a prefilter outlet line 128-2, respectively.
In an alternative implementation manner of the embodiment of the present invention, the pre-filter 11 includes a filter housing 111, and a spiral channel 112 and a gas riser 113 that are disposed in the filter housing 111, a gas inlet and a gas outlet are provided on the filter housing 111, an air inlet end of the spiral channel 112 is connected to the gas inlet, an air inlet of the gas riser 113 is connected to a center of an air outlet end of the spiral channel, an air outlet of the gas riser 113 is communicated with the gas outlet, and a sintering filter layer made of metal is filled in the gas riser 113; a sewage pipeline 114 is also communicated between the filter shell 111 and the sewage inlet, and two sewage control valves V9 connected in series are arranged on the sewage pipeline 114;
the post-filter 13 has the same structure as the pre-filter 11.
In an alternative implementation manner of the embodiment of the present invention, a hydrogen inlet humidity detector M1 and a hydrogen flow meter F1 are disposed on an input pipeline between the pre-filter 11 and the first purification absorption tower 12; a hydrogen outlet humidity detector M2 and a hydrogen purity measurer N1 are arranged on an output pipeline between the post filter 13 and the first purification absorption tower 12, and the hydrogen purity measurer N1 is used for measuring the purity of the hydrogen absorbed by the absorption tower;
A communication bypass 16 is arranged between the output end of the pre-filter 11 and the input end of the post-filter 13, and a first electromagnetic valve YV1 is arranged on the communication bypass 16;
When the hydrogen humidity data of the hydrogen humidity detector M1 and the hydrogen outlet humidity detector M2 are smaller than the set data, the first electromagnetic valve YV1 is opened, the communication bypass 16 is conducted, most of hydrogen flows through the bypass pipeline and enters a stopped dehumidification state, the regeneration operation is continued to be completed, and the first purification absorption tower 12 and the second purification absorption tower 21 are not switched;
Referring to fig. 4, hydrogen humidity data from the hydrogen inlet humidity detector M1 and the hydrogen outlet humidity detector M2 are compared with set data:
When the hydrogen humidity data is greater than the upper limit of the set data, judging the working state of the first purification absorption tower 12 and the second purification absorption tower 21, continuously maintaining the current purification/regeneration working state of the first purification absorption tower 12 and the second purification absorption tower 21 in operation, switching the first purification absorption tower 12 or the second purification absorption tower 21 which is in operation suspension, and closing the first electromagnetic valve YV1;
When the hydrogen humidity data is within the range of the set data, maintaining the current operating states of the first purification absorption column 12 and the second purification absorption column 21;
when the hydrogen humidity data is less than the lower limit of the set data, the first solenoid valve YV1 is opened, the regeneration operation of the second purification absorption tower 21 is maintained, and the switching operation of the first purification absorption tower 12 and the second purification absorption tower 21 is suspended after the regeneration is completed. At this time, a large portion of the hydrogen flows through the pipe communicating with the bypass 16, and a small portion of the hydrogen flows through the first purification absorption column 12, and is subjected to a proper amount of recycle purification.
When the hydrogen humidity data is smaller than the lower limit of the set data and is considered to be too low in the generator, the whole online purification device is in a single purification working mode. In this single purification mode of operation, need control second purification absorption tower 21 will not cool off the drainage when carrying out the adsorbent regeneration, directly carry out exhaust gas separation, when the regeneration cooling like this, moisture can still stay in dry adsorbent to can the interior hydrogen humidity of effectual control generator, compromise continuous hydrogen on-line purification work simultaneously, guarantee the interior hydrogen purity of generator is higher all the time.
Referring to fig. 5, the hydrogen flow data of the hydrogen flow meter F1 is compared with the normal data:
when the temperature increases, the high-pressure blower 123 in the first purification absorption tower 12 is stopped and only the high-pressure blower 123 in the second purification absorption tower 21 in the regeneration state is turned on, as defined by the fact that the circulation blower function is not required;
normally, the high-pressure blowers 123 in the first purification absorption tower 12 and the second purification absorption tower 21 maintain the respective current states;
When the first purification absorption column 12 is turned on in the absorption state, the high-pressure blower 123 is also turned on, as defined as the need for the circulation fan function.
Referring to fig. 6, the control system 30 performs flow judgment according to the hydrogen flow data of the hydrogen flow measuring instrument F1, and if the flow is abnormal, the PLC controller 31 controls the alarm indicator lamp to send an alarm prompt; if the flow is normal, other data are acquired in real time and are respectively input into the PLC and the human-computer interface touch screen 32, a data curve is formed, and the analysis result is directly displayed through the comparison analysis of the general condition big data of the same generator type, so that direct data reference and visual generator operation condition assessment report are provided. Other data herein include hydrogen flow, displacement, hydrogen humidity data within the generator, etc. The daily displacement and the hydrogen humidity value in the generator are important parameters for measuring the running condition of the generator, and generally, the water content of the sealing oil of the generator, the sealing condition of the bearing bush of the generator, the adjustment condition of the sealing oil pressure difference, the water leakage condition in the generator and the like can be judged according to the water content, the sealing oil pressure difference and the water leakage condition in the generator, and the running efficiency of the generator can be judged according to the water content. The embodiment of the invention is designed to automatically measure and record the normal water discharge and the hydrogen humidity in the generator at the same moment to form a data curve, and directly display the analysis result through comparing and analyzing the general condition big data of the same generator type, and provide direct data reference and generator operation condition assessment report, thereby having the advantages of accuracy, timeliness and reliability.
In an alternative implementation of the embodiment of the present invention, the regeneration air flow cooler 22 includes a cooler main body 221, one side of the cooler main body 221 is provided with a cooling water inlet and a cooling water outlet, one end of the cooler main body 221 close to the cooling water outlet is connected with the upper four-way valve V7, and one end of the cooler main body 221 close to the cooling water inlet is connected with the exhaust gas separation reservoir with a fourth temperature meter T4 installed therebetween.
The fourth temperature meter T4 is used for monitoring the temperature value of the outlet of the cooler after the regenerated gas flow is cooled by the cooler.
In an alternative implementation manner of the embodiment of the invention, the waste gas separation storage device comprises a device housing 231, wherein a storage chamber 232, a separation chamber 233 and a sedimentation chamber 234 which are sequentially communicated are arranged in the device housing 231, a cyclone channel 235 is arranged in the separation chamber 233 and is communicated with the cooler main body 221, the cyclone channel 235 is communicated with the storage chamber 232 through a central riser 236, and a macromolecule separation membrane 2361 is arranged in the central riser 236; the storage chamber 232 is positioned above the separation chamber 233 and is connected with the lower four-way valve V8; the settling chamber 234 is provided with an exhaust gas hydrogen content measuring instrument, an exhaust gas automatic discharge pipeline 237 and an automatic drainage pipeline 238, the exhaust gas automatic discharge pipeline 237 is sequentially provided with an exhaust control valve V1, a second electromagnetic valve YV2 and a discharge measuring instrument F3, and the automatic drainage pipeline 238 is sequentially provided with a drainage control valve V2, a water storage cylinder 239 and a micro-flow measuring instrument F2.
The waste gas separation storage 23 adopts cyclone separation technology, heavy gas sedimentation technology and membrane separation technology to separate waste gas and hydrogen in the regenerated gas stream, so as to discharge the hydrogen as little as possible. The arrangement of the drainage control valve V2, the water storage cylinder 239 and the micro-flow meter F2 realizes the automatic metering and adjusting functions of the drainage, and the arrangement of the exhaust control valve V1, the second electromagnetic valve YV2 and the exhaust meter M1 realizes the automatic metering and adjusting functions of the exhaust. The exhaust gas hydrogen content measuring instrument at the lower part of the exhaust gas separation storage 23 is used for intelligently controlling the start of discharging hydrogen only when the hydrogen content of the exhaust gas is smaller than a set value.
In an alternative implementation manner of the embodiment of the present invention, the control system 30 includes a PLC controller 31, and a human-computer interface touch screen 32 and an alarm indicator that are respectively connected to the PLC controller, where the PLC controller 31 is further electrically connected to the first electromagnetic valve YV1, the second electromagnetic valve YV2, the first pressure gauge P1, the second pressure gauge P2, the hydrogen gas flow meter F1, the emission meter F3, the micro-flow meter F2, the hydrogen inlet humidity detector M1, the hydrogen outlet humidity detector M2, the hydrogen gas purity measurer N1, the first temperature meter T1, the second temperature meter T2, the third temperature meter T3, the fourth temperature meter T4, the absorber, the separator, the cooler, the filter, and the pneumatic actuator 15, respectively. The first pressure gauge P1 and the second pressure gauge P2 are respectively used for displaying the working pressures of the first purification absorption tower 12 and the second purification absorption tower 21, the first temperature gauge T1 represents the internal temperature of the first purification absorption tower 12, the second temperature gauge T2 represents the internal temperature of the second purification absorption tower 21, and the third temperature gauge T3 represents the temperature value of the regeneration gas outlet.
In an alternative implementation manner of the embodiment of the present invention, the hydrogen purification device further comprises a gas replacement operation system 40, wherein the gas replacement operation system 40 comprises a replacement inlet 41 and a replacement outlet 42, one end of the replacement inlet 41 is connected to the side of the regenerated gas inflow port pipeline 128-1, which is close to the lower four-way valve V8, and the other end of the replacement inlet 41 is connected to a carbon dioxide supply place through a replacement inlet pipeline 411, and a replacement inlet valve V6 is arranged on the replacement inlet pipeline 411; one end of the displacement outlet 42 is connected with the side of the regenerated gas inflow port pipeline 128-1, which is close to the waste gas separation storage, and the other end is connected to a gas discharge position through a displacement outlet pipeline 421, and a displacement outlet valve V5 is arranged on the displacement outlet pipeline 421; the regenerated gas inflow port pipeline 128-1 between the replacement inlet 41 and the replacement outlet 42 is also provided with a replacement separation valve V3, the position of the pre-filter outlet pipeline 128-2, which is close to the lower four-way valve V8, is provided with a pressure balance valve V4, and one end of the pressure balance valve V4, which is connected with the lower four-way valve V8, is simultaneously connected with the regenerated gas inflow port pipeline 128-1.
In an alternative implementation manner of the embodiment of the present invention, the hydrogen purification device further includes a hydrogen purity measurement system 50, where the hydrogen purity measurement system 50 includes a hydrogen purity monitor 51, where the hydrogen purity monitor 51 is connected to two ends of the first purification absorption tower 12 through an inlet sampling pipe 511 and an outlet sampling pipe 512, and the inlet sampling pipe 511 and the outlet sampling pipe 512 are respectively provided with a first sampling control valve V10 and a second sampling control valve V11. The function of the hydrogen purity measurement system 50 is primarily to measure the inlet hydrogen purity and the outlet hydrogen purity by valve switching.
The working principle of the embodiment of the invention is as follows:
The hydrogen purification principle is completed by utilizing solid adsorbents such as octanized silica gel, active carbon, lithium-based molecular sieve, sodium-based molecular sieve and the like which are arranged in an absorption tower of a vertical pressure vessel to selectively adsorb various impurities in the mixed gas. Because the boiling points of the components in the mixed gas are different, the raw material gas passes through the adsorbent bed 122 according to the characteristic of being volatile and not easy to adsorb and being volatile and easy to be adsorbed, the rest components except hydrogen are selectively adsorbed by the adsorbent as impurities, and the hydrogen with low boiling point and highest volatility is basically not adsorbed and leaves the adsorbent bed with the purity of more than 99v percent, so that the aim of separating the hydrogen from other impurities is fulfilled.
The basic principle of temperature swing adsorption is to utilize the characteristic that the adsorption capacity of the adsorbent for different components is greatly different along with the temperature, adsorb high boiling point impurity components in raw material gas at normal temperature under the condition of selective adsorption of the adsorbent, remove the impurities at high temperature, and regenerate the adsorbent. By utilizing the principle, impurities adsorbed by the adsorbent can be desorbed to the maximum extent under the condition of not consuming hydrogen, and the adsorption capacity is optimal during working, so that the product gas is kept to be high in purity.
The hydrogen pressure in the generator is lower and is lower than 0.50MPa, and in order to ensure the reliability of the device and the quality of product hydrogen, the online purification device provided by the embodiment of the invention realizes a reliable treatment process of pretreatment deoiling, deoxidizing, TSA removing impurity gas and impurity gas separating and discharging. Specifically, the hydrogen from the generator flows through the pre-filter 11 to be filtered to remove liquid drops, a small amount of oil vapor, part of C 3+ and other liquid substances, oxygen in the hydrogen is removed in the first purification absorption tower 12 through palladium catalyst catalysis, CO 2、N2、C3+ gas components are removed in the second purification absorption tower 21 through a Temperature Swing Adsorption (TSA) method, and finally waste gas is separated and discharged through cyclone sedimentation and membrane separation, so that the separation of H 2 and impurity components such as H 2O、N2、O2 and C 2+ is realized, and the purpose of continuous purification of the hydrogen is achieved.
The working process of the embodiment of the invention comprises the following steps:
In the purification and absorption process, hydrogen from the generator flows through the pre-filter 11 at first, flows through the spiral channel 112 in the pre-filter 11 to generate high-speed rotation, and is subjected to centrifugal action to separate all non-gaseous heavy objects from the hydrogen to remove liquid substances such as liquid drops, oil vapor, part C 3+ and the like, and only the gas flows out through the gas riser 113 in the middle part, so that the sintered filter layer in the gas riser 113 can filter out impurities such as atomized oil, fine particles and the like in the gas, and the discharged hydrogen is further purified. The hydrogen flowing out of the pre-filter 11 is guided by the lower four-way valve V8 to always flow through the first purification absorption tower 12 in an absorption and purification working mode, sequentially enters an active carbon bed layer, a silica gel octyl bed layer, a lithium-based molecular sieve bed layer and a sodium-based molecular sieve bed layer in the first purification absorption tower 12, sequentially adsorbs C 2+、H2O、N2 and other impurity gases, removes most impurity gases except hydrogen at one time, only leaves a small amount of O 2, then enters the deoxidizing bed layer at the uppermost part of the absorption tower, and enables oxygen to react with hydrogen to generate water under the action of a palladium-platinum catalyst, so that oxygen in the hydrogen is removed, and the water is absorbed by the mixed dry adsorbent, so that the hydrogen is thoroughly purified. The purified hydrogen is subjected to secondary filtration treatment by the post filter 13 before returning to the generator, so that the high quality of the hydrogen in the generator is ensured. When the adsorption tower adsorbs to a certain degree, the hydrogen purification performance is reduced, at this time, the adsorbent is regenerated to recover the adsorption purification capability, at this time, the second purification absorption tower 21 needing to be regenerated is placed in a regeneration loop through the switching of the rotation of the upper four-way valve V7 and the lower four-way valve V8 by 90 degrees, and the regenerated second purification absorption tower 21 is placed in the absorption loop to perform continuous absorption purification operation.
In the regeneration process, the heater 124 embedded in the adsorbent bed 122 is utilized to heat the adsorbent to about 150-200 ℃, then the adsorbent is desorbed and released, meanwhile, the hydrogen gas enclosed in the regeneration system is pushed by the high-pressure blower 123 arranged in the tower to flow through the desiccant absorption layer, the released water vapor and impurity gas are brought into the regeneration airflow cooler 22, heat exchange is carried out between the regeneration airflow cooler 22 and cooling water, the water vapor is condensed and separated, and the water vapor is discharged from the drainage control valve V2 through the waste gas separation storage 23 and the water storage barrel 239. The impurity gas enters the waste gas separation storage 23 along with the regenerated gas flow, hydrogen flows through the cyclone channel 235 to generate high-speed rotation in the waste gas separation storage 23, all non-gaseous heavy objects are separated from the hydrogen under the centrifugal action, only the gas passes through the impurity gas, the heavier impurity gas converges all around and settles down, the lighter hydrogen converges towards the middle part, the lighter hydrogen flows upwards through the central riser 236, the central riser 236 is internally provided with the high-molecular separation membrane 2361 with larger permeation rate for the hydrogen and smaller permeation rate for other impurity gases, the hydrogen rapidly passes through the high-molecular separation membrane 2361, and the other gases only slightly permeate through the high-molecular separation membrane 2361, so that the impurity gas is enriched in the waste gas separation storage 23 and settles downwards, and when the impurity gas content in the waste gas separation storage 23 exceeds the set content limit value, the equipment starts the second electromagnetic valve YV2 to discharge the waste gas, and the waste gas is removed. The regenerated gas containing a small amount of impurity gas flows out through the polymer separation membrane 2361 of the central riser 236, returns to the bottom of the second purification absorption tower 21, is pressurized by the built-in high-pressure blower 123, and then continues to perform the regeneration cycle. After the regeneration and desorption are completed, the heating is stopped, the hydrogen gas sealed in the regeneration system is pushed by a high-pressure fan arranged in the second purification absorption tower 21 to continuously flow through the adsorbent bed 122, so that the hydrogen gas is gradually cooled to normal temperature, and after the cooling is completed, the first purification absorption tower 12 completes one cycle, and the next cycle of adsorption and purification working process can be performed. The first purification absorption column 12 and the second purification absorption column 21 are circulated in this way, and the continuous purification work is completed.
The economic benefit of the embodiment of the invention:
According to the calculation of related data, if the purity of the hydrogen is improved by 1 percentage point, the wind mill loss can be reduced by 11%, the loss (the output of the generator is improved) is reduced by about 100KW/h, and the loss is basically unchanged as long as the generator operates, and is not changed due to the change of the load of the generator, which is equivalent to the fact that 280 tons of raw coal can be saved when the generator operates for one year when the purity of the hydrogen is improved by 1 percentage point. If the purity of the hydrogen of the generator in a certain factory generally fluctuates between 96-98%, the online purification device provided by the embodiment of the invention has the potential of improving the purity of the hydrogen by about 2 percent, and after the implementation, about 500 tons of standard coal can be saved in year.
The foregoing description is only a preferred embodiment of the present invention, and is not intended to limit the invention in any way, but any simple modification and equivalent variation of the above embodiment according to the technical spirit of the present invention falls within the scope of the present invention.
Claims (5)
1. An on-line purification device for hydrogen for a hydrogen-cooled generator, comprising:
The circulating purification system comprises a pre-filter, a first purification absorption tower and a post-filter which are sequentially connected between a generator hydrogen outlet and a generator hydrogen inlet, wherein the first purification absorption tower is always in a working state for absorbing and purifying hydrogen when in operation, and the working state is used for deoiling, deoxidizing, denitrifying and purifying carbon dioxide of the hydrogen;
the circulating regeneration system comprises a second purifying absorption tower, a regenerated airflow cooler and an exhaust gas separation storage which are sequentially connected in a closed loop, wherein the second purifying absorption tower is always in a regeneration state when in operation, and the regeneration state is used for removing impurity gas by TSA and separating and discharging the impurity gas;
the working states of the first purification absorption tower of the circulating purification system and the second purification absorption tower of the circulating regeneration system are operatively interchanged and are respectively in a working state and a regeneration state;
the control system is respectively connected with the circulating purification system and the circulating regeneration system and is used for regulating and controlling the automatic absorption purification process of the circulating purification system and the automatic circulating regeneration process of the circulating regeneration system;
Wherein, two ends of the first purification absorption tower are respectively connected with the post-filter and the pre-filter through an upper four-way valve and a lower four-way valve; two ends of the second purification absorption tower are respectively connected with the regenerated airflow cooler and the waste gas separation storage through an upper four-way valve and a lower four-way valve; the valve rods of the upper four-way valve and the lower four-way valve are operated to synchronously rotate for 90 degrees, so that the connection relation between the first purification absorption tower and the second purification absorption tower can be exchanged; the valve rods of the upper four-way valve and the lower four-way valve are connected through a connecting rod and a pneumatic actuator, and are used for realizing synchronous operation of the two valve rods;
the first purification absorption tower comprises an absorption tower body, wherein an adsorbent bed layer and a high-pressure air blower which are arranged up and down are arranged in the absorption tower body, the adsorbent bed layer comprises an activated carbon bed layer, a silica gel octyl bed layer, a lithium-based molecular sieve bed layer, a sodium-based molecular sieve bed layer and a deoxidization bed layer which are sequentially connected from bottom to top, and the deoxidization bed layer is filled with a palladium-platinum catalyst and a dry adsorbent; a heater is buried in the adsorbent bed layer, and the heater and the high-pressure air blower are started in the automatic cycle regeneration process;
The absorption tower body is provided with a first temperature gauge and a first pressure gauge, the upper part of the absorption tower body is provided with a working air flow outlet pipeline connected with an upper four-way valve, and the bottom of the absorption tower body is provided with a working air flow inlet pipeline connected with a lower four-way valve;
The second purification absorption tower has the same structure as the first purification absorption tower and is provided with a second temperature gauge and a second pressure gauge;
Simultaneously, the upper four-way valve is also connected with the regenerated airflow cooler and the post filter through a regenerated airflow outlet pipeline and a post filter inlet pipeline respectively; the regenerated gas outlet pipeline is also provided with a regenerated gas flow control valve and a third temperature meter; the lower four-way valve is also connected with the waste gas separation storage and the pre-filter through a regenerated gas inflow port pipeline and a pre-filter outlet pipeline respectively;
The filter comprises a filter shell, a spiral channel and a gas lifting pipe, wherein the spiral channel and the gas lifting pipe are arranged in the filter shell, a gas inlet and a gas outlet are formed in the filter shell, the gas inlet end of the spiral channel is connected with the gas inlet, the center of the gas outlet end of the spiral channel is connected with the gas inlet of the gas lifting pipe, the gas outlet of the gas lifting pipe is communicated with the gas outlet, and a sintering filter layer made of metal is filled in the gas lifting pipe; a sewage pipeline is also communicated between the filter shell and the sewage inlet, and two sewage control valves connected in series are arranged on the sewage pipeline;
the structure of the post filter is the same as that of the pre filter;
The waste gas separation storage comprises an equipment shell, wherein a storage chamber, a separation chamber and a sedimentation chamber which are sequentially communicated are arranged in the equipment shell, a cyclone separation channel is arranged in the separation chamber and is communicated with the cooler main body, the cyclone separation channel is communicated with the storage chamber through a central riser, and a high polymer separation membrane is arranged in the central riser; the storage chamber is positioned above the separation chamber and is connected with the lower four-way valve; the sedimentation chamber is provided with an exhaust gas hydrogen content measuring instrument, an exhaust gas automatic discharge pipeline and an automatic drainage pipeline, the exhaust gas automatic discharge pipeline is sequentially provided with an exhaust control valve, a second electromagnetic valve and a discharge measuring instrument, and the automatic drainage pipeline is sequentially provided with a drainage control valve, a water storage cylinder and a micro-flow measuring instrument;
The control system comprises a PLC controller, a human-computer interface touch screen and an alarm indicator lamp, wherein the human-computer interface touch screen and the alarm indicator lamp are respectively connected with the PLC controller, and the PLC controller is further electrically connected with a first electromagnetic valve, a second electromagnetic valve, a first pressure gauge, a second pressure gauge, a hydrogen flow measuring instrument, a discharge measuring instrument, a micro-flow measuring instrument, a hydrogen inlet humidity detecting instrument, a hydrogen outlet humidity detecting instrument, a hydrogen purity measuring instrument, a first temperature measuring instrument, a second temperature measuring instrument, a third temperature measuring instrument, a fourth temperature measuring instrument, an absorption tower, a separator, a cooler, a filter and a pneumatic actuator respectively.
2. The on-line purification apparatus for hydrogen for a hydrogen-cooled generator according to claim 1, wherein a hydrogen inlet humidity detector and a hydrogen flow meter are provided on an input line between the pre-filter and the first purification absorption tower; a hydrogen outlet humidity detector and a hydrogen purity measurer are arranged on an output pipeline between the post filter and the first purification absorption tower, and the hydrogen purity measurer is used for measuring the purity of the hydrogen absorbed by the absorption tower;
A communication bypass is arranged between the output end of the front filter and the input end of the rear filter, and a first electromagnetic valve is arranged on the communication bypass; when the hydrogen humidity data of the hydrogen humidity detector and the hydrogen outlet humidity detector are smaller than the set data, the first electromagnetic valve is opened, the communication bypass is conducted, the dehumidification stopping state is entered, the regeneration operation is continued to be completed, and the first purification absorption tower and the second purification absorption tower are not switched;
When the hydrogen flow data of the hydrogen flow measuring instrument is larger than the normal data, the function of a circulating fan is not needed, and the corresponding high-pressure air blower is started only in a regeneration state; when the hydrogen flow data of the hydrogen flow measuring instrument is smaller than the normal data, the circulating fan is needed, and the corresponding high-pressure air blower is started in the absorption state.
3. The on-line purification apparatus for hydrogen-cooled generator as recited in claim 2, wherein the regeneration gas flow cooler comprises a cooler main body, a cooling water inlet and a cooling water outlet are respectively provided at one side of the cooler main body, one end of the cooler main body close to the cooling water outlet is connected with the upper four-way valve, one end of the cooler main body close to the cooling water inlet is connected with the exhaust gas separation reservoir, and a fourth temperature meter is installed therebetween.
4. The on-line purification apparatus of hydrogen for a hydrogen-cooled generator of claim 1, further comprising a gas displacement operating system comprising a displacement inlet and a displacement outlet; one end of the replacement inlet is connected with the side, close to the lower four-way valve, of the regenerated gas inflow port pipeline, the other end of the replacement inlet is connected to a carbon dioxide supply position through a replacement inlet pipeline, and a replacement inlet valve is arranged on the replacement inlet pipeline; one end of the replacement outlet is connected with the side, close to the waste gas separation storage, of the regenerated gas inflow port pipeline, the other end of the replacement outlet is connected to a gas discharge position through a replacement outlet pipeline, and a replacement outlet valve is arranged on the replacement outlet pipeline; the regenerated gas inlet pipeline between the replacement inlet and the replacement outlet is also provided with a replacement separation valve, the position of the outlet pipeline of the pre-filter, which is close to the lower four-way valve, is provided with a pressure balance valve, and one end of the pressure balance valve, which is connected with the lower four-way valve, is simultaneously connected with the regenerated gas inlet pipeline.
5. The on-line purification apparatus for hydrogen for a hydrogen-cooled generator according to claim 4, further comprising a hydrogen purity measurement system, wherein the hydrogen purity measurement system comprises a hydrogen purity monitor, the hydrogen purity monitor is connected to two ends of the first purification absorption tower through an inlet sampling pipeline and an outlet sampling pipeline, and the inlet sampling pipeline and the outlet sampling pipeline are respectively provided with a first sampling control valve and a second sampling control valve.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1083264A (en) * | 1963-11-27 | 1967-09-13 | August Hornkohl | Separator for removing undesirable solid and/or liquid foreign bodies from flowing gases |
| CN105879670A (en) * | 2016-06-27 | 2016-08-24 | 河南省日立信股份有限公司 | Hydrogen deoxidizing and drying device of hydrogen-cooled power generator set |
| CN208526233U (en) * | 2018-05-30 | 2019-02-22 | 国电泰州发电有限公司 | A kind of generator hydrogen drying system for hydrogen that can be automatically controled |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111320137A (en) * | 2018-12-14 | 2020-06-23 | 国家能源投资集团有限责任公司 | Method and system for separating and purifying hydrogen from mixed gas |
| CN110697655B (en) * | 2019-10-25 | 2024-06-14 | 西南化工研究设计院有限公司 | Method and system device for recovering hydrogen through membrane separation concentration |
| CN115650171A (en) * | 2022-10-18 | 2023-01-31 | 无锡隆基氢能科技有限公司 | Method and system for purifying electrolytic hydrogen |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1083264A (en) * | 1963-11-27 | 1967-09-13 | August Hornkohl | Separator for removing undesirable solid and/or liquid foreign bodies from flowing gases |
| CN105879670A (en) * | 2016-06-27 | 2016-08-24 | 河南省日立信股份有限公司 | Hydrogen deoxidizing and drying device of hydrogen-cooled power generator set |
| CN208526233U (en) * | 2018-05-30 | 2019-02-22 | 国电泰州发电有限公司 | A kind of generator hydrogen drying system for hydrogen that can be automatically controled |
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