CN111348712A - Fuel gas recovery device - Google Patents
Fuel gas recovery device Download PDFInfo
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- CN111348712A CN111348712A CN202010188194.8A CN202010188194A CN111348712A CN 111348712 A CN111348712 A CN 111348712A CN 202010188194 A CN202010188194 A CN 202010188194A CN 111348712 A CN111348712 A CN 111348712A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/06—Flash evaporation
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/04—Purifying combustible gases containing carbon monoxide by cooling to condense non-gaseous materials
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
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- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
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- General Chemical & Material Sciences (AREA)
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Abstract
The invention provides a fuel gas recovery device. The fuel gas recovery device includes: the system comprises a high-pressure flash tank, a first cooler, a first gas-liquid separation tank, a second cooler, a second gas-liquid separation tank and a fuel gas buffer tank; a first pipeline is arranged at the top of the high-pressure flash tank, and the other end of the first pipeline is connected with the first cooler; and a second pipeline is arranged at the bottom of the first cooler, and the other end of the second pipeline is connected with the first gas-liquid separation tank. The fuel gas recovery device provided by the invention has the advantages of simple process design, convenience in processing and installation, safety and reliability, and effectively solves the problem of resource waste caused by feeding the synthesis gas obtained by flash evaporation of black water into a torch for combustion; the economical operation of the space furnace device is promoted; the gas source with stable gas quality and gas quantity is provided for the fuel gas required by the hot blast stove system of the space furnace; the synthesis gas which is flashed out by the black water is generated in the device, so that the consumption of external fuel gas of the hot blast stove is reduced, and the operation efficiency of the device is improved.
Description
Technical Field
The invention relates to the field of coal chemical industry and power generation production equipment, in particular to a fuel gas recovery device.
Background
According to the requirements of coal chemical industry and power generation technology, the space furnace device adopts a chilling process and a three-stage flash evaporation mode. The dry pulverized coal and pure oxygen (purity 99.6%) are combusted in a gasification furnace to produce qualified synthesis gas (main components H2 and CO), the high-temperature synthesis gas enters a washing tower system for further washing after being chilled and water-bathed, and the cleaner synthesis gas after being washed is sent to a purification system for further treatment.
The synthetic gas is dissolved in black water under high temperature and high pressure, the synthetic gas is mainly dissolved in the black water of a gasification furnace and a washing tower, the black water enters a high-pressure flash tank for flash evaporation after being decompressed through an angle valve, the synthetic gas dissolved in the black water is resolved out, the resolved synthetic gas is cooled and then primarily separated, the separated synthetic gas is sent to a torch for combustion, and the synthetic gas is sent to the torch for combustion, so that the waste of resources is caused.
Therefore, it is necessary to provide a fuel gas recovery device to solve the above technical problems.
Disclosure of Invention
The invention provides a fuel gas recovery device, which solves the problem of resource waste caused by the fact that synthesis gas is sent to a torch for combustion.
In order to solve the above-mentioned technical problem, the present invention provides a fuel gas recovery apparatus, comprising:
the system comprises a high-pressure flash tank, a first cooler, a first gas-liquid separation tank, a second cooler, a second gas-liquid separation tank and a fuel gas buffer tank;
a first pipeline is arranged at the top of the high-pressure flash tank, and the other end of the first pipeline is connected with the first cooler;
a second pipeline is arranged at the bottom of the first cooler, and the other end of the second pipeline is connected with the first gas-liquid separation tank;
a third pipeline is arranged at the top of the first gas-liquid separation tank, and the other end of the third pipeline is connected with the second cooler;
a fourth pipeline is arranged at the bottom of the second cooler, and the other end of the fourth pipeline is connected with the second gas-liquid separation tank;
a fifth pipeline is arranged at the top of the second gas-liquid separation tank and connected with the fuel gas buffer tank, and a sixth pipeline is arranged at the top of the fuel gas buffer tank;
the process design is simple, the processing and the installation are convenient, the safety and the reliability are realized, and the problem of resource waste caused by the fact that the synthesis gas obtained by flashing the black water is sent to a torch for combustion is effectively solved; the economical operation of the space furnace device is promoted;
the gas source with stable gas quality and gas quantity is provided for the fuel gas required by the hot blast stove system of the space furnace;
the synthesis gas which is flashed out by the black water is generated in the device, so that the consumption of external fuel gas of the hot blast stove is reduced, and the operation efficiency of the device is improved.
Preferably, the first cooler is a primary cooler, and the second cooler is a secondary cooler.
Preferably, the first cooler and the second cooler are both forcibly cooled and heat exchanged by circulating water.
Preferably, the first gas-liquid separation tank adopts a first-stage gas-liquid separation tank, and the second gas-liquid separation tank adopts a second-stage gas-liquid separation tank.
Preferably, the bottom of the high-pressure flash tank is provided with a first liquid pipe, the bottom of the first gas-liquid separation tank is provided with a second liquid pipe, and the bottom of the second gas-liquid separation tank is provided with a third liquid pipe.
A method of fuel gas recovery apparatus comprising the steps of:
s1, reducing the pressure of the black water through a high-pressure flash tank, allowing the synthesis gas of saturated water vapor flashed from the black water to enter the first cooler through a first pipeline after the pressure reduction, and cooling and exchanging heat on the synthesis gas through the first cooler;
s2, cooling the heat exchange gas of S1, then enabling the cooled heat exchange gas to enter the first gas-liquid separation tank through a second pipeline for gas-liquid separation, enabling the separated synthesis gas to enter the second cooler through a third pipeline, and carrying out cooling heat exchange for the second time;
and S3, discharging the synthesis gas subjected to secondary cooling and heat exchange in the S2 to the inside of a second gas-liquid separation tank through a fourth pipeline, performing gas-liquid separation, discharging the separated synthesis gas to a fuel gas buffer tank through a fifth pipeline, and finally supplying the synthesis gas to a lower-level user through the fuel gas buffer tank.
Preferably, the pressure of the black water in S1 is 4.0MPa, the pressure is reduced to 0.5MPa, and the temperature for flashing the black water is 160 ℃.
Preferably, the synthesis gas in S1 is H2, CO and steam.
Preferably, the temperature of the synthesis gas after cooling heat exchange in the S1 is 80 ℃.
Preferably, the temperature of the synthesis gas after cooling and heat exchange in the S2 is 50 ℃.
Compared with the related art, the fuel gas recovery device provided by the invention has the following beneficial effects:
the invention provides a fuel gas recovery device, wherein black water is depressurized through a high-pressure flash tank, the black water with the pressure of 4.0MPa is reduced to 0.5MPa, synthesis gas of saturated steam flashed from the black water with the temperature of 160 ℃ enters a first cooler through a first pipeline after depressurization, the synthesis gas is cooled and heat exchanged through the first cooler, and the synthesis gas is cooled to 80 ℃; cooling the heat exchange gas, then entering the first gas-liquid separation tank through a second pipeline for gas-liquid separation, entering the separated synthesis gas into a second cooler through a third pipeline, cooling and exchanging heat for the second time, and cooling the synthesis gas to 50 ℃; finally, the synthesis gas subjected to secondary cooling and heat exchange is discharged into a second gas-liquid separation tank through a fourth pipeline for gas-liquid separation, the separated synthesis gas is discharged into a fuel gas buffer tank through a fifth pipeline, and finally the synthesis gas is supplied to a subordinate user through the fuel gas buffer tank;
the process design is simple, the processing and the installation are convenient, the safety and the reliability are realized, and the problem of resource waste caused by the fact that the synthesis gas obtained by flashing the black water is sent to a torch for combustion is effectively solved; the economical operation of the space furnace device is promoted; the gas source with stable gas quality and gas quantity is provided for the fuel gas required by the hot blast stove system of the space furnace; the synthesis gas which is flashed out by the black water is generated in the device, so that the consumption of external fuel gas of the hot blast stove is reduced, and the operation efficiency of the device is improved.
Drawings
FIG. 1 is a schematic structural diagram of a fuel gas recovery device according to a preferred embodiment of the present invention;
FIG. 2 is a schematic structural view of a gas-liquid separator according to the present invention;
fig. 3 is a plan view of the movable frame shown in fig. 2.
Reference numbers in the figures: 1. the high-pressure flash tank, 2, a first cooler, 3, a first gas-liquid separation tank, 4, a second cooler, 5, a second gas-liquid separation tank, 6, a fuel gas buffer tank, 7, a first pipeline, 8, a second pipeline, 9, a third pipeline, 10, a fourth pipeline, 11, a fifth pipeline, 12, a first liquid pipe, 13, a second liquid pipe, 14, a third liquid pipe, 15, a sixth pipeline, 16, a tank body, 17, a support frame, 18, a separation sleeve, 19, a filter plate, 20, a sponge mat, 21, an opening, 22, a water absorption mat, 23, an electric telescopic rod, 24, a compression plate, 25, a movable frame, 26, an S-shaped heat exchange tube, 27 and an air release tube.
Detailed Description
The invention is further described with reference to the following figures and embodiments.
Referring to fig. 1, fig. 2 and fig. 3, wherein fig. 1 is a schematic structural diagram of a fuel gas recycling apparatus according to a preferred embodiment of the present invention; FIG. 2 is a schematic structural view of a gas-liquid separator according to the present invention; fig. 3 is a plan view of the movable frame shown in fig. 2. The fuel gas recovery device includes:
the system comprises a high-pressure flash tank 1, a first cooler 2, a first gas-liquid separation tank 3, a second cooler 4, a second gas-liquid separation tank 5 and a fuel gas buffer tank 6;
a first pipeline 7 is arranged at the top of the high-pressure flash tank 1, and the other end of the first pipeline 7 is connected with the first cooler 2;
a second pipeline 8 is arranged at the bottom of the first cooler 2, and the other end of the second pipeline 8 is connected with the first gas-liquid separation tank 3;
a third pipeline 9 is arranged at the top of the first gas-liquid separation tank 3, and the other end of the third pipeline 9 is connected with the second cooler 4;
a fourth pipeline 10 is arranged at the bottom of the second cooler 4, and the other end of the fourth pipeline 10 is connected with the second gas-liquid separation tank 5;
the top of the second gas-liquid separation tank 5 is provided with a fifth pipeline 11, the fifth pipeline 11 is connected with the fuel gas buffer tank 6, and the top of the fuel gas buffer tank 6 is provided with a sixth pipeline 15.
The process design is simple, the processing and the installation are convenient, the safety and the reliability are realized, and the problem of resource waste caused by the fact that the synthesis gas obtained by flashing the black water is sent to a torch for combustion is effectively solved; the economical operation of the space furnace device is promoted;
the gas source with stable gas quality and gas quantity is provided for the fuel gas required by the hot blast stove system of the space furnace;
the synthesis gas which is flashed out by the black water is generated in the device, so that the consumption of external fuel gas of the hot blast stove is reduced, and the operation efficiency of the device is improved.
The first cooler 2 is a primary cooler, and the second cooler 4 is a secondary cooler.
The first cooler 2 and the second cooler 4 adopt circulating water to perform forced cooling and heat exchange.
The first gas-liquid separation tank 3 adopts a first-stage gas-liquid separation tank, and the second gas-liquid separation tank 5 adopts a second-stage gas-liquid separation tank.
The bottom of high pressure flash tank 1 is provided with first liquid pipe 12, the bottom of first gas-liquid separation jar 3 is provided with second liquid pipe 13, the bottom of second gas-liquid separation jar 5 is provided with third liquid pipe 14.
A method of fuel gas recovery apparatus comprising the steps of:
s1, reducing the pressure of the black water through the high-pressure flash tank 1, allowing the synthesis gas of saturated water vapor flashed from the black water to enter the first cooler 2 through the first pipeline 7 after the pressure reduction, and cooling and exchanging heat on the synthesis gas through the first cooler 2;
s2, cooling the heat exchanged gas in the S1, then entering the first gas-liquid separation tank 3 through a second pipeline 8 for gas-liquid separation, and entering the separated synthesis gas into a second cooler 4 through a third pipeline 9 for secondary cooling and heat exchange;
and S3, discharging the synthesis gas subjected to secondary cooling and heat exchange in the S2 to the inside of a second gas-liquid separation tank 5 through a fourth pipeline 10, performing gas-liquid separation, discharging the separated synthesis gas to a fuel gas buffer tank 6 through a fifth pipeline 11, and finally supplying the synthesis gas to a lower-level user through the fuel gas buffer tank 6.
Preferably, the pressure of the black water in S1 is 4.0MPa, the pressure is reduced to 0.5MPa, and the temperature for flashing the black water is 160 ℃.
Preferably, the synthesis gas in S1 is H2, CO and steam.
Preferably, the temperature of the synthesis gas after cooling heat exchange in the S1 is 80 ℃.
Preferably, the temperature of the synthesis gas after cooling and heat exchange in the S2 is 50 ℃.
When in operation, the device also comprises a gas-liquid separator, wherein the gas-liquid separator comprises a tank body 16, two sides of the inner wall of the tank body 16 are respectively provided with a support frame 17, a separation sleeve 18 is arranged between two opposite sides of the support frames 17, the bottom of the inner wall of the separation sleeve 18 is provided with a filter plate 19, the top of the filter plate 19 is provided with a sponge cushion 20, and the tops of two sides of the inner wall of the separation sleeve 18 are respectively provided with a through hole 21;
most of liquid in the gas can be absorbed by the sponge cushion 20, and is discharged through the through holes and finally discharged through the air release pipe 27;
the top parts of the two support frames 17 are respectively provided with a water absorption pad 22, the top part of the inner wall of the tank body 16 is provided with an electric telescopic rod 23, the bottom end of the electric telescopic rod 23 penetrates through the separation sleeve 18 and extends to the inside of the separation sleeve 18, and one end of the electric telescopic rod 23 extending to the inside of the separation sleeve 18 is provided with a compression plate 24;
the arrangement of the water absorption pad 22 can re-separate the gas after the adsorption of the sponge mat, so that the gas-liquid separation effect is improved, the compression plate 24 can be driven to move up and down through the arrangement of the electric telescopic rod 23, the sponge mat 20 on the filter plate 19 can be extruded through the downward movement of the compression plate 24, so that a water source in the sponge mat 20 is extruded, the subsequent water source adsorption is facilitated, and the electric telescopic rod 23 is arranged in the tank body 16 in a waterproof manner;
a movable frame 25 is fixedly connected between two sides of the inner wall of the tank body 16, an S-shaped heat exchange tube 26 is arranged between two sides of the inner wall of the movable frame 25 through a support rod, and an air leakage tube 27 is arranged on one side of the top of the tank body 16;
the air leakage pipe 27 is used for discharging gas after gas-liquid separation, and the S-shaped heat exchange pipe 26 can assist in heat exchange and cooling of the gas, so that the gas is liquefied, and preliminary separation is achieved.
The working principle of the fuel gas recovery device provided by the invention is as follows:
the black water is depressurized through a high-pressure flash tank 1, the pressure of the black water is reduced to 0.5MPa, after depressurization, synthesis gas of saturated water vapor obtained by flashing black water at 160 ℃ enters a first cooler 2 through a first pipeline 7, the synthesis gas is cooled and heat exchanged through the first cooler 2, and the synthesis gas is cooled to 80 ℃;
cooling the heat exchange gas, then entering the first gas-liquid separation tank 3 through a second pipeline 8 for gas-liquid separation, entering the separated synthesis gas into a second cooler 4 through a third pipeline 9 for secondary cooling and heat exchange, and cooling the synthesis gas to 50 ℃;
and finally, discharging the synthesis gas subjected to secondary cooling and heat exchange to the inside of a second gas-liquid separation tank 5 through a fourth pipeline 10 for gas-liquid separation, discharging the separated synthesis gas to a fuel gas buffer tank 6 through a fifth pipeline 11, and finally supplying the synthesis gas to a subordinate user through the fuel gas buffer tank 6.
Compared with the related art, the fuel gas recovery device provided by the invention has the following beneficial effects:
the black water is depressurized through a high-pressure flash tank 1, the pressure of the black water is reduced to 0.5MPa, after depressurization, synthesis gas of saturated water vapor obtained by flashing black water at 160 ℃ enters a first cooler 2 through a first pipeline 7, the synthesis gas is cooled and heat exchanged through the first cooler 2, and the synthesis gas is cooled to 80 ℃; cooling the heat exchange gas, then entering the first gas-liquid separation tank 3 through a second pipeline 8 for gas-liquid separation, entering the separated synthesis gas into a second cooler 4 through a third pipeline 9 for secondary cooling and heat exchange, and cooling the synthesis gas to 50 ℃; finally, the synthesis gas subjected to secondary cooling and heat exchange is discharged into a second gas-liquid separation tank 5 through a fourth pipeline 10 for gas-liquid separation, the separated synthesis gas is discharged into a fuel gas buffer tank 6 through a fifth pipeline 11, and finally the synthesis gas is supplied to a lower-level user through the fuel gas buffer tank 6;
the process design is simple, the processing and the installation are convenient, the safety and the reliability are realized, and the problem of resource waste caused by the fact that the synthesis gas obtained by flashing the black water is sent to a torch for combustion is effectively solved; the economical operation of the space furnace device is promoted; the gas source with stable gas quality and gas quantity is provided for the fuel gas required by the hot blast stove system of the space furnace; the synthesis gas which is flashed out by the black water is generated in the device, so that the consumption of external fuel gas of the hot blast stove is reduced, and the operation efficiency of the device is improved.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A fuel gas recovery device, comprising:
the system comprises a high-pressure flash tank, a first cooler, a first gas-liquid separation tank, a second cooler, a second gas-liquid separation tank and a fuel gas buffer tank;
a first pipeline is arranged at the top of the high-pressure flash tank, and the other end of the first pipeline is connected with the first cooler;
a second pipeline is arranged at the bottom of the first cooler, and the other end of the second pipeline is connected with the first gas-liquid separation tank;
a third pipeline is arranged at the top of the first gas-liquid separation tank, and the other end of the third pipeline is connected with the second cooler;
a fourth pipeline is arranged at the bottom of the second cooler, and the other end of the fourth pipeline is connected with the second gas-liquid separation tank;
the top of second gas-liquid separation jar is provided with the fifth pipeline, the fifth pipeline with the fuel gas buffer tank is connected, the top of fuel gas buffer tank is provided with the sixth pipeline.
2. The fuel gas recovery device according to claim 1, wherein the first cooler is a primary cooler, and the second cooler is a secondary cooler.
3. The fuel gas recovery device of claim 1, wherein the first cooler and the second cooler are both cooled and heat exchanged by forced cooling with circulating water.
4. The fuel gas recovery apparatus according to claim 1, wherein the first gas-liquid separation tank is a primary gas-liquid separation tank, and the second gas-liquid separation tank is a secondary gas-liquid separation tank.
5. The fuel gas recovery apparatus of claim 1, wherein the bottom of the high-pressure flash tank 1 is provided with a first liquid pipe, the bottom of the first gas-liquid separation tank is provided with a second liquid pipe, and the bottom of the second gas-liquid separation tank is provided with a third liquid pipe.
6. A method of fuel gas recovery apparatus, comprising the steps of:
s1, reducing the pressure of the black water through a high-pressure flash tank, allowing the synthesis gas of saturated water vapor flashed from the black water to enter the first cooler through a first pipeline after the pressure reduction, and cooling and exchanging heat on the synthesis gas through the first cooler;
s2, cooling the heat exchange gas of S1, then enabling the cooled heat exchange gas to enter the first gas-liquid separation tank through a second pipeline for gas-liquid separation, enabling the separated synthesis gas to enter the second cooler through a third pipeline, and carrying out cooling heat exchange for the second time;
and S3, discharging the synthesis gas subjected to secondary cooling and heat exchange in the S2 to the inside of a second gas-liquid separation tank through a fourth pipeline, performing gas-liquid separation, discharging the separated synthesis gas to a fuel gas buffer tank through a fifth pipeline, and finally supplying the synthesis gas to a lower-level user through the fuel gas buffer tank.
7. The method of fuel gas recovery device of claim 6, wherein the pressure of 4.0MPa black water in S1 is reduced to 0.5MPa, and the temperature of black water flash evaporation is 160 ℃.
8. The method of fuel gas recovery unit of claim 6, wherein the syngas in S1 is H2, CO, and steam.
9. The fuel gas recovery process of claim 6 wherein the cooled heat exchanged syngas temperature in S1 is 80 ℃.
10. The fuel gas recovery method according to claim 6, wherein the temperature of the synthesis gas after cooling heat exchange in S2 is 50 ℃.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010188194.8A CN111348712A (en) | 2020-03-17 | 2020-03-17 | Fuel gas recovery device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010188194.8A CN111348712A (en) | 2020-03-17 | 2020-03-17 | Fuel gas recovery device |
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| CN111348712A true CN111348712A (en) | 2020-06-30 |
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| CN202010188194.8A Pending CN111348712A (en) | 2020-03-17 | 2020-03-17 | Fuel gas recovery device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116354480A (en) * | 2023-03-30 | 2023-06-30 | 实联化工(江苏)有限公司 | Torch sewage treatment device and process |
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