CN106594787A - Method and equipment for generating electricity by utilizing low-pressure saturated steam, and coking system - Google Patents
Method and equipment for generating electricity by utilizing low-pressure saturated steam, and coking system Download PDFInfo
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- CN106594787A CN106594787A CN201710054943.6A CN201710054943A CN106594787A CN 106594787 A CN106594787 A CN 106594787A CN 201710054943 A CN201710054943 A CN 201710054943A CN 106594787 A CN106594787 A CN 106594787A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L7/00—Supplying non-combustible liquids or gases, other than air, to the fire, e.g. oxygen, steam
- F23L7/002—Supplying water
- F23L7/005—Evaporated water; Steam
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
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- Chemical & Material Sciences (AREA)
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Abstract
The invention discloses a method and equipment for generating electricity by utilizing industrial exhaust gas which comprises low-pressure saturated steam, and a coking system, and belongs to the technical field of waste-heat utilization. The method comprises the following steps: obtaining the low-pressure saturated steam from the industrial exhaust gas; providing a combustible gas and a combustion-supporting gas; mixing the combustible gas, the combustion-supporting gas and the low-pressure saturated steam to obtain a primary mixture; igniting the primary mixture to generate a combustion product, wherein the heat value of the combustion product is greater than that of the low-pressure saturated steam; and generating electricity by utilizing the combustion product. According to the electricity generating method disclosed by the invention, after the combustible gas, the combustion-supporting gas and the low-pressure saturated steam are mixed and combusted, the heat value of the low-pressure saturated steam is improved; when the combustion product of the low-pressure saturated steam is utilized for generating electricity, the electricity generating efficiency can be greatly improved; resources can be effectively saved; and meanwhile, the emission of nitrogen oxides can also be reduced, and the environment is protected.
Description
Technical field
The present invention relates to technical field of waste heat utilization, and in particular to a kind of using the industrial tail gas for including low-pressure saturated steam
It is the method that generated electricity, a kind of using including generating equipment that the industrial tail gas of low-pressure saturated steam are generated electricity and a kind of wrap
Include the coking system of the generating equipment.
Background technology
General, the substantial amounts of industrial tail gas including low-pressure saturated steam are often produced in industrial production.But, for
The a large amount of low-pressure saturated steams for producing, unsuitable Land use systems so that the utilization rate of low-pressure saturated steam is extremely low, makes
Into the waste of resource.
For example, at home in coking field, traditional claus oven can produce low-pressure saturated steam, liquefied natural gas
(Liquefied Natural Gas, LNG) synthesizing section can also produce low-pressure saturated steam.But, produced low pressure is satisfied
It is little with the purposes of steam, typically all use after pressure and temperature reducing, high-grade steam reduces being used after taste, full using low pressure
Then generating efficiency is very low with the steam direct generation of electricity.
Therefore, how effectively utilizes include that the industrial tail gas of low-pressure saturated steam become this area technology urgently to be resolved hurrily and ask
Topic.
The content of the invention
It is contemplated that at least solving one of technical problem present in prior art, it is proposed that one kind is utilized includes low pressure
Method that the industrial tail gas of saturated vapor are generated electricity, a kind of generated electricity using the industrial tail gas for including low-pressure saturated steam
Generating equipment and a kind of coking system including the generating equipment.
To achieve these goals, a first aspect of the present invention, there is provided a kind of using the work for including low-pressure saturated steam
The method that industry tail gas is generated electricity, methods described includes：
Low-pressure saturated steam is obtained from industrial tail gas；
Fuel gas and combustion-supporting gas are provided；
Mix the fuel gas, the combustion-supporting gas and the low-pressure saturated steam, to obtain primary mix；
The primary mix is lighted, to generate combustion product, wherein, the calorific value of the combustion product is higher than the low pressure
The calorific value of saturated vapor；
Generated electricity using the combustion product.
Preferably, the fuel gas includes any in coke-stove gas, liquefied petroleum gas, water-gas, gas and biogas
A kind of or its combination.
Preferably, the combustion-supporting gas includes any one in air, pure oxygen, high pure oxygen and ultrapure oxygen or its combination.
Preferably, the mixing fuel gas, the combustion-supporting gas and the low-pressure saturated steam, to obtain primary
The step of mixture, includes：
The fuel gas is processed, so that the gas of the air pressure of the fuel gas and the low-pressure saturated steam
Pressure is consistent；Wherein, the air pressure of the low-pressure saturated steam is 1.5-2.5MPa；
Fuel gas, the combustion-supporting gas and the low-pressure saturated steam after mixed processing, it is described primary mixed to obtain
Compound.
Preferably, the industrial tail gas include liquefied natural gas synthesizing section tail gas and/or pyrogenetic reaction tail gas.
Preferably, methods described also includes：
The exhaust steam for completing to produce to being generated electricity using the combustion product carries out condensation process and/or flash distillation process.
A second aspect of the present invention, there is provided a kind of using sending out that the industrial tail gas for including low-pressure saturated steam are generated electricity
Electric equipment, the generating equipment includes：
Retracting device, the retracting device is used to reclaim low-pressure saturated steam from industrial tail gas；
Combustible gas source, the combustible gas source is used to provide fuel gas；
Combustion-supporting gas source, the combustion-supporting gas source is used to provide combustion-supporting gas；
Burner, the burner respectively with the retracting device, the combustible gas source and the combustion-supporting gas
Source connects, and to mix the fuel gas, the combustion-supporting gas and the low-pressure saturated steam, obtains primary mix；
The burner is additionally operable to light the primary mix, to generate combustion product；Wherein, the combustion product
Calorific value higher than the low-pressure saturated steam calorific value；
TRT, the burner is connected with the TRT, to provide the burning to the TRT
Product, to be generated electricity using the combustion product.
Preferably, the TRT includes steam turbine and generator, and the steam turbine is connected with the generator, described
Combustion product can promote the steam turbine to rotate, to drive the generator.
Preferably, the generating equipment also includes the process dress being connected between the retracting device and the burner
Put；
The processing meanss be used for receive and process the fuel gas so that the air pressure of the fuel gas with it is described
The air pressure of low-pressure saturated steam is consistent, wherein the air pressure of the low-pressure saturated steam is 1.5-2.5MPa；
The processing meanss are additionally operable to for the fuel gas after process to introduce the burner.
Preferably, the generating equipment also includes condensing unit, and the condensing unit is connected with the TRT, described
Condensing unit can carry out condensation process to the exhaust steam that the TRT is produced；And/or,
The generating equipment also includes flash distillation plant, and the flash distillation plant is connected with the TRT, the flash distillation dress
Putting can carry out flash distillation process to the exhaust steam that the TRT is produced.
A kind of a third aspect of the present invention, there is provided coking system, the coking system includes coking waste heat utilization equipment
And generating equipment, the generating equipment include above-mentioned any one described in generating equipment, wherein, the coking UTILIZATION OF VESIDUAL HEAT IN sets
It is standby to connect with the retracting device, to provide the industrial tail gas to the retracting device.
Preferably, when the generating equipment include condensing unit when, the condensing unit also with the coking UTILIZATION OF VESIDUAL HEAT IN
Equipment is connected, to provide condensed water to the coking waste heat utilization equipment；And/or,
When the generating equipment includes flash distillation plant, the flash distillation plant is also connected with supplying heat source, with to the heat supply
Source provides hot water.
The electricity-generating method of the present invention, using by fuel gas, combustion-supporting gas and low-pressure saturated steam mixed combustion, can improve
The calorific value of low-pressure saturated steam, when being generated electricity using the combustion product including the low-pressure saturated steam, can greatly improve and send out
Electrical efficiency, can with effectively save resource, while, additionally it is possible to reduce the discharge of nitrogen oxides, environmental protection.
The generating equipment of the present invention, using by fuel gas, combustion-supporting gas and low-pressure saturated steam mixed combustion, can improve
The calorific value of low-pressure saturated steam, when being generated electricity using the combustion product including the low-pressure saturated steam, can greatly improve and send out
Electrical efficiency, can with effectively save resource, while, additionally it is possible to reduce the discharge of nitrogen oxides, environmental protection.
The coking system of the present invention, using the generating equipment of said structure, can make full use of coking waste heat utilization equipment
The produced low-pressure saturated steam in technique productions are carried out.Using fuel gas and low-pressure saturated steam mixed combustion, to carry
The calorific value of high-low pressure saturated vapor, in the mixed vapour of generation, calorific value is higher, it is possible to increase generating efficiency, economizes on resources, together
When, additionally it is possible to reduce the discharge of nitrogen oxides, effective protection environment.
Description of the drawings
Accompanying drawing is, for providing a further understanding of the present invention, and to constitute the part of specification, with following tool
Body embodiment is used to explain the present invention together, but is not construed as limiting the invention.In the accompanying drawings：
Fig. 1 is the process flow diagram of electricity-generating method in one embodiment of the invention；
Fig. 2 is the structural representation of generating equipment in one embodiment of the invention.
Description of reference numerals
100：Generating equipment；
110：Retracting device；
120：Combustible gas source；
130：Burner；
140：TRT；
150：Combustion-supporting gas source；
160：Processing meanss；
170：Condensing unit；
180：Flash distillation plant；
A：Fuel gas；
B：Combustion-supporting gas
C：Low-pressure saturated steam；
D：Condensed water.
Specific embodiment
The specific embodiment of the present invention is described in detail below in conjunction with accompanying drawing.It should be appreciated that this place is retouched
The specific embodiment stated is merely to illustrate and explains the present invention, is not limited to the present invention.
Inventor's discovery, in coking field, can produce substantial amounts of low-pressure saturated steam.For example, in the LNG of coking process
In workshop section, the low-pressure saturated steam of surplus can be produced, then for example, the industrial tail gas produced by claus oven also include substantial amounts of low
Pressure saturated vapor.Specifically, for example, claus oven can produce 2MPa low-pressure saturated steams (assuming to produce 50 tons), and 2MPa is low
The temperature of pressure saturated vapor is usually 200 DEG C or more, with higher calorific value.The side of traditional use low-pressure saturated steam
Method is：(being typically depressurized to 0.4-0.8MPa to use) is used for other workshop sections after pressure and temperature reducing, but, what other workshop sections were used
It is only seldom a part of, for example, only 20 tons.It will be apparent that also substantial amounts of low-pressure saturated steam is not utilized effectively,
Therefore, inventor proposes following improvement, to the problem for overcoming low-pressure saturated steam superfluous.
With reference to Fig. 1, a first aspect of the present invention, being related to a kind of utilization includes that the industrial tail gas of low-pressure saturated steam carry out sending out
Method S100 of electricity.Wherein the method includes：
S110, obtain from industrial tail gas low-pressure saturated steam.
It should be noted that in this step, low-pressure saturated steam is obtained from industrial tail gas, specifically, can be from
Low-pressure saturated steam is obtained in same industrial tail gas, or from two kinds or more of different industrial tail gas, respectively
Obtain low-pressure saturated steam.
Preferably, in actual industrial production, above-mentioned industrial tail gas can include liquefied natural gas (Liquefied
Natural Gas, LNG) low-pressure saturated steam produced by synthesizing section, low pressure produced in pyrogenetic reaction can also be included
Saturated vapor, for example, in coking field, can also produce low-pressure saturated steam etc. in the industrial tail gas of claus oven.
S120, offer fuel gas and combustion-supporting gas.
In this step, the concrete species of fuel gas is not defined, for improve generating efficiency, for example, can
Combustion gas body can be coke-stove gas, and due to the universal production capacity surplus in coke-oven plant, substantial amounts of coke-stove gas cannot be utilized sufficiently, because
This, being generated electricity using coke-stove gas, combustion-supporting gas and low-pressure saturated steam can also solve the problems, such as coke-oven plant's production capacity surplus so that
Realize more preferable economic benefit in traditional coke-oven plant.When coke-stove gas, fuel gas and low-pressure saturated steam mixed combustion, combustion
Burn and can have in reacted combustion product higher calorific value, with higher kinetic energy, being generated electricity using the combustion product can be big
Big improve generating efficiency, can further improve the economic benefit of coke-oven plant.
Further, above-mentioned fuel gas can also be any one in liquefied petroleum gas, water-gas, gas and biogas
Or its combination.
Explanation is needed further exist for, fuel gas, combustion-supporting gas and low-pressure saturated steam are mixed, when lighting, can
Combustion gas body can burn more abundant.On the one hand, in combustion product, carbon eventually in the form of carbon dioxide, subtracts
The environmental pollution that the toxic gases such as carbon monoxide bring is lacked.On the other hand, when fuel gas fully burns, can discharge big
The heat of amount so that the calorific value of the fuel gas is transferred in low-pressure saturated steam and other combustion products, it is possible to increase send out
Electrical efficiency.
Also, it should be noted that for the concrete composition of combustion-supporting gas is not defined, it is for instance possible to use empty
Gas, pure oxygen, high pure oxygen and ultrapure oxygen etc..In this embodiment, it is preferred that pure oxygen can be adopted, using pure oxygen as combustion-supporting gas
Body, because pure oxygen is not contained or containing few nitrogen, therefore is not in nitrogen oxides in combustion product, can further be subtracted
Few environmental pollution.
Specifically, may be referred to standard GB/T/T with regard to the specific technical requirements of pure oxygen, high pure oxygen and ultrapure oxygen
14599-2008, therefore not to repeat here.
S130, mixed combustible gas body, combustion-supporting gas and low-pressure saturated steam, to obtain primary mix.
Preferably, step S130 further can also include：
Fuel gas is processed, so that the air pressure of fuel gas is consistent with the air pressure of low-pressure saturated steam；Wherein,
The air pressure of low-pressure saturated steam is 1.5-2.5MPa；
Fuel gas, combustion-supporting gas and low-pressure saturated steam after mixed processing, to obtain primary mix.
In this step, in carrying out being processed so that the step that its air pressure is consistent with low-pressure saturated steam to fuel gas,
It is for instance possible to use compressor is compressed to the fuel gas so that it meets the requirement of air pressure, can also be using other pressures
Contracting equipment is processed the fuel gas.
In the present embodiment electricity-generating method, on the one hand, enable to the air pressure of fuel gas and the air pressure of low-pressure saturated steam
Unanimously, after fuel gas is mixed with low-pressure saturated steam, the air pressure of low-pressure saturated steam will not be changed.On the other hand, may be used
The air pressure of combustion gas body is consistent with the air pressure of low-pressure saturated steam, is also easy to for the fuel gas to be passed into reception low-pressure saturated steam
Device in, in the apparatus to mix low-pressure saturated steam and fuel gas, to obtain primary mix.
It is to be further understood that in this step, though for the air pressure of fuel gas is not clearly restricted, preferably may be used
The air pressure of combustion gas body is consistent with the air pressure of low-pressure saturated steam.
S140, primary mix is lighted, to generate combustion product, wherein, the calorific value of combustion product steams higher than low pressure saturation
The calorific value of vapour.
In this step, the mixture of fuel gas, combustion-supporting gas and low-pressure saturated steam is lighted, fuel gas can be sent out
Raw combustion reaction.Equally, illustrate by taking coke-stove gas as an example, coke-stove gas is hydrocarbon, occur combustion reaction with
Afterwards, the chemical substances such as carbon dioxide, water can be obtained.Herein it should be noted that low-pressure saturated steam is in the combustion reaction, and
The chemical reaction is not involved in, therefore combustion product should also include the low-pressure saturated steam.
S150, using combustion product generate electricity.
In this step, the combustion product can be sent in generating equipment, for example, sends into steam turbine, the high heating value
Combustion product, with high velocity air (high velocity air that substantial amounts of kinetic energy, the movable vane piece fanging noz(zle) leaf coral on steam turbine are projected
For combustion product, combustion product is the gaseous mixture for including carbon dioxide and low-pressure saturated steam etc.), can be the dynamic of combustion product
Mechanical energy can be converted into, turbine rotor is rotated, the rotor of steam turbine can be connected by shaft coupling with the rotor of generator,
Generator amature can be driven to rotate, realize generating electricity.
The electricity-generating method of the present embodiment, employs coking field superfluous fuel gas (for example, coke-stove gas), combustion-supporting gas
The low-pressure saturated steam of body and surplus is generated electricity, by fuel gas, combustion-supporting gas and low-pressure saturated steam mixed combustion
After, the calorific value of low-pressure saturated steam can be improved, when being generated electricity using the combustion product including the low-pressure saturated steam, can
Greatly improve generating efficiency, enable to surplus resource convert to a greater degree, can with effectively save resource, while, moreover it is possible to
Enough reduce the discharge of nitrogen oxides, environmental protection.
Preferably, above-mentioned electricity-generating method also includes：
S160, the exhaust steam to completing to produce using combustion product generating carry out condensation process and/or flash distillation process.
Specifically, for example, carry out condensation process to exhaust steam, condensate can recycle (for example, can return boiler to
Water).For incoagulable gas, flash distillation process can also be carried out, the hot water after flash distillation process can serve as the application scenarios such as heating,
Waste gas can be discharged directly.
The electricity-generating method of the present embodiment, to exhaust steam subsequent condensation process and flash distillation process are carried out, cold after condensation process
Solidifying water can be recycled, and the hot water after flash distillation process can serve as the occasions such as heating, therefore, it is possible to further economize on resources,
Avoid the wasting of resources and environmental pollution.
A second aspect of the present invention, being related to a kind of utilization includes the generating that the industrial tail gas of low-pressure saturated steam are generated electricity
Equipment 100.With reference to Fig. 2, wherein, the generating equipment 100 includes：
Retracting device 110, the retracting device 110 is used to reclaim low-pressure saturated steam C from industrial tail gas.
Specifically, the inside of the retracting device 110 can be provided with chamber (not showing that in figure), and exterior thereto is provided with
The air inlet connected with chamber interior and exhaust outlet, low-pressure saturated steam C is passed through the within the chamber by air inlet.In addition, this time
Receiving apparatus 110 can also be only a pipeline, and pipeline inside is used to accommodate low-pressure saturated steam C.Certainly, the retracting device
110 can also be other recovery structures.
Combustible gas source 120, the combustible gas source 120 is used to provide fuel gas A.
Combustion-supporting gas source 150, the combustion-supporting gas source 150 is used to provide combustion-supporting gas B.
Burner 130, the burner 130 respectively with retracting device 110, combustible gas source 120 and combustion-supporting gas source
150 connections, with mixed combustible gas body A, combustion-supporting gas B and low-pressure saturated steam C, obtain primary mix.
Specifically, the burner 130 can be provided with three or more air inlets (not showing that in figure) and at least one
Individual exhaust outlet (not showing that in figure), the exhaust outlet of above-mentioned retracting device 110 and one of air inlet of burner 130
Connection, to provide low-pressure saturated steam C to burner 130, one of them of combustible gas source 120 and burner 130 is entered
Gas port is connected, and to provide fuel gas A to burner 130, one of them of combustion-supporting gas source 150 and burner 130 is entered
Gas port is connected, to provide combustion-supporting gas B to burner 130, and in the internal mix fuel gas A of burner 130, combustion-supporting gas
Body B and low-pressure saturated steam C, obtains primary mix.
Above-mentioned burner 130 is additionally operable to light primary mix, to generate combustion product.Wherein, the heat of combustion product
Calorific value of the value higher than low-pressure saturated steam C.
TRT 140, above-mentioned burner 130 is connected with the TRT 140, to provide to the TRT 140
Combustion product, to be generated electricity using the combustion product.
Specifically, the TRT 140 can be provided with air inlet (not showing that in figure), above-mentioned burner 130
Exhaust outlet is connected with the air inlet of TRT 140, to provide combustion product to TRT 140.
It should be noted that for the concrete structure of burner 130 is not defined, for example, the burner
130 can be that a burner or one accommodate tank etc., and it should meet the conditions such as high temperature resistant and sealing.
Explanation is needed further exist for, for retracting device 110, burner 130 and TRT 140 specifically connect
Connect mode and do not define, it is for instance possible to use pipeline is by the exhaust outlet of one of device and another device
Air inlet connection etc., it is preferably closed between each device and other devices to connect in order to prevent gas from leaking.
In the generating equipment 100 of the present embodiment structure, primary mix is mixed with combustion-supporting gas B, when lighting, can
Combustion gas body A can burn more abundant.On the one hand, in combustion product, carbon eventually in the form of carbon dioxide, subtracts
The environmental pollution that the toxic gases such as carbon monoxide bring is lacked.On the other hand, when fuel gas A fully burns, can discharge
Substantial amounts of heat so that the calorific value of fuel gas A is transferred in low-pressure saturated steam C and other combustion products, Neng Gouti
High generation efficiency.
The explanation of the concrete composition for combustion-supporting gas B may refer to appropriate section in first technical theme of the invention
Description, therefore not to repeat here.
The generating equipment 100 of the present embodiment structure, employs superfluous fuel gas A (for example, the coke-oven coals in coking field
Gas), the low-pressure saturated steam C of combustion-supporting gas B and surplus generated electricity, by fuel gas A, combustion-supporting gas B and low pressure
After saturated vapor C mixed combustions, the calorific value of low-pressure saturated steam C can be improved, using the burning for including low-pressure saturated steam C
When product is generated electricity, generating efficiency can be greatly improved, the resource for enabling to surplus is converted to a greater degree, can be effective
Economize on resources, meanwhile, when lighting, more fully, in combustion product, carbon is eventually with dioxy for the mixed gas burning
Change in the form of carbon, reduce the environmental pollution that the toxic gases such as carbon monoxide, nitrogen oxides bring.
Preferably, above-mentioned TRT 140 includes steam turbine (not showing that in figure) and generator (not showing that in figure).
Wherein, the air inlet of the TRT 140 is provided with steam turbine, steam turbine is connected with generator, to drive generator.
The generating equipment 100 of the present embodiment structure, is a kind of concrete structure of TRT 140.In this example, will burn
The mixed gas including low-pressure saturated steam C after product, i.e. raising calorific value, feeding steam turbine, the mixed gas of the high heating value,
With substantial amounts of kinetic energy, (high velocity air is produced the high velocity air that the movable vane piece fanging noz(zle) leaf coral on steam turbine is projected for burning
Thing, combustion product is the gaseous mixture for including carbon dioxide and low-pressure saturated steam etc., and the gaseous mixture has higher temperature, for example
750 DEG C shown in Fig. 2), the kinetic energy of combustion product can be converted into mechanical energy, turbine rotor is rotated, steam turbine
Rotor can be connected by shaft coupling with the rotor of generator, and generator amature can be driven to rotate, and realize generating electricity.Certainly, originally
The concrete structure of the TRT 140 of invention is not restricted to this, every to utilize steam-electric power (by the kinetic energy of steam most
Be converted to electric energy eventually) structure be intended to be included in.
Preferably, above-mentioned generating equipment 100 also includes the process being connected between retracting device 110 and burner 130
Device 160.
Specifically, processing meanss 160 can be provided with air inlet (not showing that in figure) and exhaust outlet (does not show in figure
Go out), the exhaust outlet of above-mentioned retracting device 110 is connected with the air inlet of the processing meanss 160, with to processing meanss 160 provide can
Combustion gas body A, processing meanss 160 are used for fuel gas A process, so that the air pressure of fuel gas A steams with low pressure saturation
The air pressure of vapour C is consistent.Wherein, the air pressure of low-pressure saturated steam is 1.5-2.5MPa, in this example, the gas of low-pressure saturated steam C
Pressure is taken as 2Mpa.
The exhaust outlet of above-mentioned processing meanss 160 is also connected with the air inlet of burner 130, to carry to burner 130
For the fuel gas A after process.
In the generating equipment 100 of the present embodiment structure, using processing meanss 160 to fuel gas A process so that can
The air pressure of combustion gas body A is consistent with the air pressure of low-pressure saturated steam C so that both do not have draught head, and fuel gas A can be facilitated
Ground is introduced in burner 130 from processing meanss 160, is contributed to fuel gas A and low-pressure saturated steam C and is sufficiently mixed, to obtain
Obtain primary mix, simple structure.
Specifically, the processing meanss 160 can adopt compressor.Compressor is that low-pressure gas is promoted to into gases at high pressure
A kind of driven fluid machinery, low-pressure gas efficiently can be converted to gases at high pressure by it.It is of course also possible to use other
Pressure texture, for example, it is also possible to using booster pump etc..
It is to be further understood that the air pressure for fuel gas B is not clearly restricted, the preferably gas of fuel gas B
Pressure is consistent with the air pressure of low-pressure saturated steam C, and in this example, the air pressure of fuel gas B is taken as 2Mpa.
Preferably, generating equipment 100 also includes condensing unit 170.Wherein, condensing unit 170 is provided with air inlet (in figure
Do not show that) and exhaust outlet (not showing that in figure), the exhaust outlet of the TRT 140 and the air inlet company of condensing unit 170
It is logical, to provide exhaust steam to condensing unit 170.
Preferably, above-mentioned generating equipment 100 also includes flash distillation plant 180.Wherein, flash distillation plant 180 is provided with air inlet
(not showing that in figure) and exhaust outlet (not showing that in figure), the exhaust outlet of above-mentioned TRT 140 and the flash distillation plant 180
Air inlet is connected, to provide exhaust steam to flash distillation plant 180.
The generating equipment 100 of the present embodiment, subsequent condensation is carried out using condensing unit 170 and flash distillation plant 180 to exhaust steam
Process and flash distillation process, the condensed water D after condensation process can be recycled, hot water (for example, the hot water temperature after flash distillation process
Spend for 93 DEG C) can serve as the occasions such as heating, for example, hot water can with connect installed in the heating radiator of user side, with to
User heats, therefore, it is possible to further economize on resources, it is to avoid the wasting of resources and environmental pollution.
A third aspect of the present invention, is related to a kind of coking system (not showing that in figure).Wherein the coking system includes Jiao
Change waste heat utilization equipment (not showing that in figure) and generating equipment 100, the generating equipment 100 includes above-mentioned any one structure
Generating equipment 100, wherein, the coking waste heat utilization equipment is connected with above-mentioned retracting device 110, to provide to retracting device 110
Above-mentioned industrial tail gas.The industrial tail gas include low-pressure saturated steam C.
The coking system of the present embodiment, using the generating equipment 100 of said structure, can make full use of coking UTILIZATION OF VESIDUAL HEAT IN
Equipment produced or storage low-pressure saturated steam C in technique productions are carried out.Using fuel gas A, combustion-supporting gas B with it is low
Pressure saturated vapor C mixed combustions, to improve the calorific value of low-pressure saturated steam C, in the mixed vapour of generation, calorific value is higher, can
Improve generating efficiency, the waste heat of efficient utilization low-pressure saturated steam C, can economize on resources, while, additionally it is possible to reduce nitrogen oxides
Discharge, effective protection environment.
Preferably, when having condensing unit 170 in the generating equipment included by the coking system, the condensing unit 170
Delivery port also connect with coking waste heat utilization equipment, to provide condensed water to the coking waste heat utilization equipment.
When having flash distillation plant 180 in the generating equipment 100 included by the coking system, the flash distillation plant 180 goes out
The mouth of a river connects with supplying heat source (not showing that in figure), to provide hot water to the supplying heat source.
The coking system of the present embodiment structure, the exhaust steam that TRT therein 140 is produced, on the one hand, for coagulability
Gas, after condensing unit process, condensed water can be used as the boiler feedwater of coking waste heat utilization equipment, it is also possible to used as Jiao
Change the boiler feedwater of factory's other equipment, be capable of achieving to recycle, on the other hand, for incoagulable gas, then can enter flash distillation
Device 180, after the portion gas flash distillation process, hot water sends into supplying heat source, and (for example, the supplying heat source can be user's heating radiator
Piece), it is possible to achieve reusing for incoagulable gas waste heat, can further economize on resources.When combustion-supporting gas B be pure oxygen,
When high pure oxygen or ultrapure oxygen, the not Nitrogen element of the waste gas after flash distillation does not pollute the environment, therefore can directly discharge.
It is understood that the embodiment of above principle being intended to be merely illustrative of the present and the exemplary enforcement for adopting
Mode, but the invention is not limited in this.For those skilled in the art, in the essence without departing from the present invention
In the case of god and essence, various modifications and improvement can be made, these modifications and improvement are also considered as protection scope of the present invention.
Claims (12)
1. a kind of utilization includes the method that the industrial tail gas of low-pressure saturated steam are generated electricity, it is characterised in that methods described bag
Include：
Low-pressure saturated steam is obtained from industrial tail gas；
Fuel gas and combustion-supporting gas are provided；
Mix the fuel gas, the combustion-supporting gas and the low-pressure saturated steam, to obtain primary mix；
The primary mix is lighted, to generate combustion product, wherein, the calorific value of the combustion product is higher than the low pressure saturation
The calorific value of steam；
Generated electricity using the combustion product.
2. method according to claim 1, it is characterised in that the fuel gas include coke-stove gas, liquefied petroleum gas,
Any one in water-gas, gas and biogas or its combination.
3. method according to claim 1, it is characterised in that the combustion-supporting gas includes air, pure oxygen, high pure oxygen and super
Any one in pure oxygen or its combination.
4. method according to claim 1, it is characterised in that the mixing fuel gas, the combustion-supporting gas and
The low-pressure saturated steam, includes the step of to obtain primary mix：
The fuel gas is processed, so that the air pressure one of the air pressure of the fuel gas and the low-pressure saturated steam
Cause, wherein the air pressure of the low-pressure saturated steam is 1.5-2.5MPa；
Fuel gas, the combustion-supporting gas and the low-pressure saturated steam after mixed processing, to obtain the primary mix.
5. the method according to Claims 1-4 any one, it is characterised in that the industrial tail gas include that liquefaction is natural
Gas synthesizing section tail gas and/or pyrogenetic reaction tail gas.
6. the method according to Claims 1-4 any one, it is characterised in that methods described also includes：
The exhaust steam for completing to produce to being generated electricity using the combustion product carries out condensation process and/or flash distillation process.
7. a kind of utilization includes the generating equipment that the industrial tail gas of low-pressure saturated steam are generated electricity, it is characterised in that described
Electric equipment includes：
Retracting device, the retracting device is used to reclaim low-pressure saturated steam from industrial tail gas；
Combustible gas source, the combustible gas source is used to provide fuel gas；
Combustion-supporting gas source, the combustion-supporting gas source is used to provide combustion-supporting gas；
Burner, the burner connects respectively with the retracting device, the combustible gas source and the combustion-supporting gas source
It is logical, to mix the fuel gas, the combustion-supporting gas and the low-pressure saturated steam, obtain primary mix；
The burner is additionally operable to light the primary mix, to generate combustion product；Wherein, the heat of the combustion product
Calorific value of the value higher than the low-pressure saturated steam；
TRT, the burner is connected with the TRT, to provide the combustion product to the TRT,
To be generated electricity using the combustion product.
8. generating equipment according to claim 7, it is characterised in that the TRT includes steam turbine and generator,
The steam turbine is connected with the generator, and the combustion product can promote the steam turbine to rotate, to drive the generating
Machine.
9. generating equipment according to claim 7, it is characterised in that the generating equipment also includes being connected to the recovery
Processing meanss between device and the burner；
The processing meanss are used to receiving and processing the fuel gas, so that the air pressure of the fuel gas and the low pressure
The air pressure of saturated vapor is consistent, wherein the air pressure of the low-pressure saturated steam is 1.5-2.5MPa；
The processing meanss are additionally operable to for the fuel gas after process to introduce the burner.
10. the generating equipment according to claim 7 to 9 any one, it is characterised in that the generating equipment also includes cold
Solidifying device, the condensing unit is connected with the TRT, and it is weary that the condensing unit can be produced to the TRT
Vapour carries out condensation process；And/or,
The generating equipment also includes flash distillation plant, and the flash distillation plant is connected with the TRT, the flash distillation plant energy
It is enough that flash distillation process is carried out to the exhaust steam that the TRT is produced.
A kind of 11. coking systems, the coking system includes coking waste heat utilization equipment and generating equipment, it is characterised in that institute
Generating equipment is stated including the generating equipment described in claim 7 to 10 any one, wherein, the coking waste heat utilization equipment with
The retracting device connection, to provide the industrial tail gas to the retracting device.
12. coking systems according to claim 11, it is characterised in that when the generating equipment includes condensing unit,
The condensing unit is also connected with the coking waste heat utilization equipment, to provide condensed water to the coking waste heat utilization equipment；
And/or,
When the generating equipment includes flash distillation plant, the flash distillation plant is also connected with supplying heat source, to carry to the supplying heat source
Supplying hot water.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710054943.6A CN106594787A (en) | 2017-01-24 | 2017-01-24 | Method and equipment for generating electricity by utilizing low-pressure saturated steam, and coking system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710054943.6A CN106594787A (en) | 2017-01-24 | 2017-01-24 | Method and equipment for generating electricity by utilizing low-pressure saturated steam, and coking system |
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Application publication date: 20170426 |