CN210825419U - Reverse-gas-release recovery device for pressure swing adsorption hydrogen production - Google Patents

Reverse-gas-release recovery device for pressure swing adsorption hydrogen production Download PDF

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Publication number
CN210825419U
CN210825419U CN201921876436.1U CN201921876436U CN210825419U CN 210825419 U CN210825419 U CN 210825419U CN 201921876436 U CN201921876436 U CN 201921876436U CN 210825419 U CN210825419 U CN 210825419U
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gas
adsorption
adsorption tower
buffer tank
air outlet
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CN201921876436.1U
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陈渊博
张强
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
    • Y02C20/00—Capture or disposal of greenhouse gases
    • Y02C20/40—Capture or disposal of greenhouse gases of CO2
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/151—Reduction of greenhouse gas [GHG] emissions, e.g. CO2

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Abstract

The utility model relates to the technical field of hydrogen production from natural gas, and discloses a reverse degassing recovery device for hydrogen production from pressure swing adsorption, which comprises a first adsorption component, a second adsorption component, a third adsorption component and a vacuumizing component, wherein the first adsorption component comprises a first adsorption tower and a carbon monoxide adsorbent, and the carbon monoxide adsorbent is arranged in the first adsorption tower; the second adsorption component comprises a second adsorption tower and a methane adsorbent, the second adsorption tower can be selectively communicated with the first adsorption tower, and the methane adsorbent is arranged in the second adsorption tower; the third adsorption component comprises a third adsorption tower, carbon dioxide and a water vapor adsorbent, the third adsorption tower can be selectively communicated with the second adsorption tower, and the carbon dioxide and the water vapor adsorbent are arranged in the third adsorption tower; the vacuumizing assembly comprises a vacuum pump which can be selectively communicated with the first adsorption tower, the second adsorption tower and the third adsorption tower. The utility model discloses can effectively retrieve the hydrogen in the contrary gassing.

Description

Reverse-gas-release recovery device for pressure swing adsorption hydrogen production
Technical Field
The utility model relates to a natural gas hydrogen manufacturing technical field, concretely relates to contrary gassing recovery unit of pressure swing adsorption hydrogen manufacturing.
Background
At present, hydrogen is generally prepared from the whole method by natural gas steam, but the generated gas contains components such as hydrogen, carbon monoxide, carbon dioxide, methane, steam and the like, the hydrogen is recovered, reverse release gas of other gases is discharged into the atmosphere, but the reverse release gas also contains a large amount of hydrogen, and the device does not recover the hydrogen in the reverse release gas.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned technique not enough, provide a contrary gassing recovery unit of pressure swing adsorption hydrogen manufacturing, solve among the prior art not to carry out the technical problem of retrieving to the hydrogen in the contrary gassing.
In order to achieve the technical purpose, the technical scheme of the utility model provides a reverse gassing recovery unit of pressure swing adsorption hydrogen manufacturing, its characterized in that includes:
the first adsorption assembly comprises a first compressor, a first adsorption tower, a first buffer tank and a carbon monoxide adsorbent, wherein the first adsorption tower is provided with a first air inlet, a first air outlet and a second air outlet, the first air inlet is communicated with the air outlet end of the first compressor, the first buffer tank can be selectively communicated with the first air outlet, and the carbon monoxide adsorbent is arranged in the first adsorption tower;
the second adsorption component comprises a second adsorption tower, a second buffer tank and a methane adsorbent, the second adsorption tower is provided with a second air inlet, a third air outlet and a fourth air outlet, the second air inlet is selectively communicated with the second air outlet, the second buffer tank is selectively communicated with the third air outlet, and the methane adsorbent is arranged in the second adsorption tower;
the third adsorption component comprises a third adsorption tower, a third buffer tank, carbon dioxide and a water vapor adsorbent, the third adsorption tower is provided with a third air inlet, a fifth air outlet and a sixth air outlet, the third air inlet is selectively communicated with the fourth air outlet, the third buffer tank is selectively communicated with the fifth air outlet, and the carbon dioxide and the water vapor adsorbent are arranged in the third adsorption tower;
and the vacuumizing assembly comprises a vacuum pump which can be selectively communicated with the first adsorption tower, the second adsorption tower and the third adsorption tower.
Compared with the prior art, the beneficial effects of the utility model include: by arranging the first adsorption component, the second adsorption component and the vacuumizing component, the reverse vent gas is injected into the first adsorption tower at a certain pressure through the first compressor, carbon monoxide in high-pressure mixed gas is absorbed by the carbon monoxide adsorbent, the rest gas enters the second adsorption tower under the action of high pressure, then the communication between the second adsorption tower and the first adsorption tower is disconnected, the vacuum pump is started to vacuumize the first adsorption tower, and the carbon monoxide absorbed by the carbon monoxide adsorbent is continuously released and enters the first buffer tank; in the second adsorption tower, methane in the high-pressure mixed gas is absorbed by a methane adsorbent, the remaining gas enters a third adsorption tower under the action of high pressure, then the third adsorption tower is disconnected from the second adsorption tower, a vacuum pump is started to vacuumize the second adsorption tower, and the methane absorbed by the methane adsorbent is continuously released and enters a second buffer tank; in the third adsorption tower, vapor and carbon dioxide in the high-pressure gas mixture are absorbed by vapor and carbon dioxide adsorbent, the remaining gas is discharged from the sixth gas outlet of the third adsorption tower under the high-pressure effect, the discharged gas has been subjected to carbon monoxide adsorption in sequence, methane adsorption, vapor and carbon dioxide adsorption, pure hydrogen is obtained, the hydrogen is collected, then the sixth gas outlet of the third adsorption tower is closed, a vacuum pump is started, the third adsorption tower is vacuumized, the vapor and the carbon dioxide absorbed by the vapor and the carbon dioxide adsorbent are continuously released and enter a third buffer tank, and the collection of hydrogen in the reverse-release gas is realized.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The utility model provides a contrary gassing recovery unit of pressure swing adsorption hydrogen manufacturing, as shown in figure 1, including inlet buffer tank 1, first adsorption component 2, second adsorption component 3, third adsorption component 4, evacuation subassembly 5, gas storage subassembly 6, fire burning furnace assembly 7, inlet buffer tank 1 has the inlet end and gives vent to anger the end.
The first adsorption module 2 comprises a first compressor 21, a first adsorption tower 22, a first buffer tank 23 and a carbon monoxide adsorbent 24, wherein the gas inlet end of the first compressor 21 can be selectively communicated with the gas outlet end of the gas inlet buffer tank 1. The first adsorption tower 22 has a first gas inlet communicated with a gas outlet end of the first compressor 21, a first gas outlet selectively communicated with the first gas outlet, and a second gas outlet, and the carbon monoxide adsorbent 24 is disposed in the first adsorption tower 22.
The carbon monoxide adsorbent 24 mainly adsorbs carbon monoxide in a mixed gas of carbon monoxide, hydrogen, carbon dioxide, water vapor and methane, and preferably, the carbon monoxide adsorbent 24 is a molecular sieve.
Preferably, the first adsorption assembly 2 further comprises a first pipeline 25, a second pipeline 26, a third pipeline 27, a first valve 28 and a second valve 29, wherein one end of the first pipeline 25 is communicated with the air outlet end of the air inlet buffer tank 1, and the other end is communicated with the air inlet end of the first compressor 21; one end of the second pipeline 26 is communicated with the air outlet end of the first compressor 21, and the other end is communicated with the first air inlet; one end of the third pipeline 27 is communicated with the first air outlet, and the other end is communicated with the air inlet end of the first buffer tank 23; the first valve 28 is disposed in the first pipe 25, the second valve 29 is disposed in the third pipe 27, and the first valve 28 and the second valve 29 may be manual valves or electric control valves, and preferably, the first valve 28 and the second valve 29 are electric control valves.
The second adsorption component 3 comprises a second adsorption tower 31, a second buffer tank 32 and a methane adsorbent 33, the second adsorption tower 31 is provided with a second air inlet, a third air outlet and a fourth air outlet, the second air inlet is selectively communicated with the second air outlet, the second buffer tank 32 is selectively communicated with the third air outlet, and the methane adsorbent 33 is arranged in the second adsorption tower 31.
Preferably, the methane adsorbent 33 is a zeolite molecular sieve. The zeolite molecular sieve mainly absorbs carbon monoxide and methane in a mixed gas of carbon monoxide, hydrogen, carbon dioxide, water vapor and methane, but the zeolite molecular sieve mainly absorbs the methane because the carbon monoxide is absorbed.
The second adsorption component 3 further comprises a second compressor 34, wherein the air inlet end of the second compressor 34 is selectively communicated with the second air outlet, and the air outlet end of the second compressor is communicated with the second air inlet.
Preferably, the second adsorption assembly 3 further includes a fourth pipeline 35, a fifth pipeline 36, a sixth pipeline 37, a third valve 38, and a fourth valve 39, wherein one end of the fourth pipeline 35 is communicated with the second air outlet, and the other end is communicated with an air inlet end of the second compressor 34; one end of the fifth pipeline 36 is communicated with the air outlet end of the second compressor 34, and the other end is communicated with the second air inlet; one end of the sixth pipeline 37 is communicated with the third air outlet, and the other end is communicated with the air inlet end of the second buffer tank 32; the third valve 38 is disposed in the fourth pipeline 35, the fourth valve 39 is disposed in the sixth pipeline 37, the third valve 38 and the fourth valve 39 may be manual valves or electric control valves, and preferably, the third valve 38 and the fourth valve 39 are electric control valves.
The third adsorption module 4 comprises a third adsorption tower 41, a third buffer tank 42, carbon dioxide and water vapor adsorbent 43, the third adsorption tower 41 has a third air inlet, a fifth air outlet and a sixth air outlet, the third air inlet is selectively communicated with the fourth air outlet, the third buffer tank 42 is selectively communicated with the fifth air outlet, and the carbon dioxide and water vapor adsorbent 43 is arranged in the third adsorption tower 41.
Preferably, the carbon dioxide/water vapor adsorbent 43 is a silica gel adsorbent that can adsorb water vapor and carbon dioxide and can absorb water vapor and carbon dioxide in a mixed gas of water vapor, carbon dioxide, and hydrogen.
Preferably, the third adsorption assembly 4 further comprises a third compressor 44, wherein the gas inlet end of the third compressor 44 is selectively communicated with the fourth gas outlet, and the gas outlet end of the third compressor is communicated with the third gas inlet.
Preferably, the third adsorption assembly 4 further includes a seventh pipeline 45, an eighth pipeline 46, a ninth pipeline 47, a fifth valve 48, and a sixth valve 49, wherein one end of the seventh pipeline 45 is communicated with the fourth gas outlet, and the other end is communicated with a gas inlet end of the third compressor 44; one end of the eighth pipeline 46 is communicated with the air outlet end of the third compressor 44, and the other end is communicated with the third air inlet; one end of the ninth pipeline 47 is communicated with the fifth air outlet, and the other end is communicated with the air inlet end of the third buffer tank 42; the fifth valve 48 is disposed in the seventh pipe 45, the sixth valve 49 is disposed in the ninth pipe 47, the fifth valve 48 and the sixth valve 49 may be manual valves or electric control valves, and preferably, the fifth valve 48 and the sixth valve 49 are electric control valves.
The vacuum pumping assembly 5 comprises a vacuum pump 51, and the vacuum pump 51 can be selectively communicated with the first adsorption tower 22, the second adsorption tower 31 and the third adsorption tower 41.
Preferably, the vacuum pumping assembly 5 further comprises a first main pipe 52, a first branch pipe 53, a second branch pipe 54, a third branch pipe 55, a seventh valve 56, an eighth valve 57, and a ninth valve 58, wherein the gas outlet end of the first main pipe 52 is communicated with the gas inlet end of the vacuum pump 51; the air outlet ends of the first branch pipe 53, the second branch pipe 54 and the third branch pipe 55 are communicated with the air inlet end of the first main pipe 52, and the air inlet end of the first branch pipe 53 is communicated with the first adsorption tower 22; the air inlet end of the second branch pipe 54 is communicated with the second adsorption tower 31; the air inlet end of the third branch pipe 55 is communicated with the third adsorption tower 41; the seventh valve 56 is disposed in the first branch pipe 53, the eighth valve 57 is disposed in the second branch pipe 54, and the ninth valve 58 is disposed in the third branch pipe 55; the seventh valve 56, the eighth valve 57, and the ninth valve 58 may be manual valves or electric control valves, and preferably, the seventh valve 56, the eighth valve 57, and the ninth valve 58 are electric control valves.
The gas storage assembly 6 comprises a fourth buffer tank 61 and a gas storage tank 62, wherein the gas inlet end of the fourth buffer tank 61 is selectively communicated with the sixth gas outlet, and the gas storage tank 62 is selectively communicated with the gas outlet end of the fourth buffer tank 61.
Preferably, the gas storage assembly 6 further includes a fourth compressor 63, a gas inlet end of the fourth compressor 63 is selectively communicated with the sixth gas outlet, and a gas outlet end of the fourth compressor 63 is communicated with a gas inlet end of the fourth buffer tank 61.
Preferably, the gas storage assembly 6 further includes a first communication pipe 64, a tenth valve 65, a second communication pipe 66, and an eleventh valve 67, wherein one end of the first communication pipe 64 is communicated with the sixth gas outlet, and the other end is communicated with a gas inlet end of the fourth compressor 63; the tenth valve 65 is disposed in the first communication pipe 64, and the tenth valve 65 may be a manual valve or an electric control valve, and more preferably, the tenth valve 65 is an electric control valve.
One end of the second communicating pipe 66 is communicated with the air outlet end of the fourth buffer tank 61, and the other end is communicated with the air inlet end of the air storage tank 62; the eleventh valve 67 is disposed in the second communication pipe 66, and the eleventh valve 67 may be a manual valve or an electric control valve, and more preferably, the eleventh valve 67 is an electric control valve.
The combustion furnace assembly 7 comprises a gas combustion furnace 71, and the gas combustion furnace 71 can be selectively communicated with the gas outlet ends of the first buffer tank 23 and the second buffer tank 32.
Preferably, the combustion furnace assembly 7 further comprises a third communicating pipe 72, a twelfth valve 73, a fourth communicating pipe 74, and a thirteenth valve 75, wherein one end of the third communicating pipe 72 is communicated with the gas inlet end of the gas combustion furnace 71, and the other end is communicated with the gas outlet end of the first buffer tank 23; the twelfth valve 73 is disposed in the third communication pipe 72, and the twelfth valve 73 may be a manual valve or an electric control valve, and more preferably, the twelfth valve 73 is an electric control valve.
One end of the fourth communicating pipe 74 communicates with the gas inlet end of the gas combustion furnace 71, and the other end communicates with the gas outlet end of the second buffer tank 32; the thirteenth valve 75 is disposed on the fourth communicating pipe 74, and the thirteenth valve 75 may be a manual valve or an electric control valve, and more preferably, the thirteenth valve 75 is an electric control valve.
The utility model discloses a concrete work flow: the reverse bleed gas is continuously introduced into the gas inlet buffer tank 1, and the reverse bleed gas is buffered and collected through the gas inlet buffer tank 1; opening the first valve 28, starting the first compressor 21, the first compressor 21 blowing the reverse-release gas in the intake buffer tank 1 into the first adsorption tower 22 and increasing the pressure continuously, when the pressure reaches a certain value, closing the first valve 28, stopping the first compressor 21, adsorbing carbon monoxide in the mixed gas by the carbon monoxide adsorbent 24 under the action of high pressure, after a certain time of adsorption, opening the second compressor 34 and the third valve 38 to blow the gas which is not adsorbed in the first adsorption tower 22 into the second adsorption tower 31, after a certain time, closing the second compressor 34 and the third valve 38, then opening the seventh valve 56, starting the vacuum pump 51, the vacuum pump 51 vacuuming the first adsorption tower 22, at this time, the carbon monoxide adsorbed by the carbon monoxide adsorbent 24 starts to be released, opening the second valve 29, the released carbon monoxide enters the first buffer tank 23, after a certain time, the vacuum pump 51, the second valve 29 and the seventh valve 56 are closed.
In the second adsorption tower 31, the second compressor 34 blows the mixed gas in the first adsorption tower 22 into the second adsorption tower 31, and continuously increases the pressure, when the pressure reaches a certain value, the second compressor 34 and the third valve 38 are closed, methane in the mixed gas is adsorbed by the methane adsorbent 33 under the action of high pressure, after a certain period of time of adsorption, the third compressor 44 and the fifth valve 48 are opened to blow the gas which is not adsorbed in the second adsorption tower 31 into the third adsorption tower 41, after a certain period of time, the third compressor 44 and the fifth valve 48 are closed, then, the eighth valve 57 is opened, the vacuum pump 51 is started, and the vacuum pump 51 vacuums the second adsorption tower 31, and at this time, the methane adsorbed by the methane adsorbent 33 starts to be released, the fourth valve 39 is opened, the released methane enters the second buffer tank 32, and after a certain time, the vacuum pump 51, the fourth valve 39 and the eighth valve 57 are closed.
In the third adsorption tower 41, the third compressor 44 blows the mixed gas in the second adsorption tower 31 into the third adsorption tower 41, and continuously increases the pressure, when the pressure reaches a certain value, the third compressor 44 and the fifth valve 48 are closed, the carbon dioxide and the water vapor in the mixed gas are adsorbed by the carbon dioxide and water vapor adsorbent 43 under the action of high pressure, after a certain period of adsorption, the fourth compressor 63 and the tenth valve 65 are opened, the gas which is not adsorbed in the third adsorption tower 41 is blown into the fourth buffer tank 61, the gas which enters the fourth buffer tank 61 is subjected to carbon monoxide adsorption, methane adsorption, water vapor and carbon dioxide adsorption in sequence, so that other gases in the reverse gas are removed, the eleventh valve 67 is opened after a certain period of time, and the hydrogen in the fourth buffer tank 61 enters the gas storage tank 62, so as to obtain relatively pure hydrogen; after a certain time, the fourth compressor 63, the tenth valve 65, and the eleventh valve 67 are closed, the ninth valve 58 is opened, the vacuum pump 51 is started, the vacuum pump 51 vacuumizes the third adsorption tower 41, at this time, the carbon dioxide and the water vapor adsorbed by the carbon dioxide and water vapor adsorbent 43 start to be released, the sixth valve 49 is opened, the released carbon dioxide and water vapor enter the third buffer tank 42, and after a certain time, the vacuum pump 51 and the ninth valve 58 are closed.
When the gas combustion furnace 71 works normally, one of the gas combustion furnace 71 and the first buffer tank 23 or the second buffer tank 32 can be communicated, the twelfth valve 73 is opened, high-pressure carbon monoxide in the first buffer tank 23 enters the gas combustion furnace 71 and is combusted to supply heat for other equipment needing heat, when the thirteenth valve 75 is opened, high-pressure methane in the second buffer tank 32 enters the gas combustion furnace 71 and is combusted to supply heat for other equipment needing heat, and carbon monoxide and methane in reverse exhaust gas are reasonably utilized.
After the third buffer tank 42 is used for a period of time, the exhaust port is opened, and the water vapor and the carbon dioxide in the third buffer tank 42 are exhausted, and can be directly exhausted because the water vapor and the carbon dioxide have no pollution to the atmosphere.
The above description of the present invention does not limit the scope of the present invention. Any other corresponding changes and modifications made according to the technical idea of the present invention should be included in the scope of the claims of the present invention.

Claims (5)

1. The utility model provides a contrary gassing recovery unit of pressure swing adsorption hydrogen manufacturing which characterized in that includes:
the first adsorption assembly comprises a first compressor, a first adsorption tower, a first buffer tank and a carbon monoxide adsorbent, wherein the first adsorption tower is provided with a first air inlet, a first air outlet and a second air outlet, the first air inlet is communicated with the air outlet end of the first compressor, the first buffer tank can be selectively communicated with the first air outlet, and the carbon monoxide adsorbent is arranged in the first adsorption tower;
the second adsorption component comprises a second adsorption tower, a second buffer tank and a methane adsorbent, the second adsorption tower is provided with a second air inlet, a third air outlet and a fourth air outlet, the second air inlet is selectively communicated with the second air outlet, the second buffer tank is selectively communicated with the third air outlet, and the methane adsorbent is arranged in the second adsorption tower;
the third adsorption component comprises a third adsorption tower, a third buffer tank, carbon dioxide and a water vapor adsorbent, the third adsorption tower is provided with a third air inlet, a fifth air outlet and a sixth air outlet, the third air inlet is selectively communicated with the fourth air outlet, the third buffer tank is selectively communicated with the fifth air outlet, and the carbon dioxide and the water vapor adsorbent are arranged in the third adsorption tower;
and the vacuumizing assembly comprises a vacuum pump which can be selectively communicated with the first adsorption tower, the second adsorption tower and the third adsorption tower.
2. The reverse vent gas recovery device for pressure swing adsorption hydrogen production according to claim 1, wherein the second adsorption module further comprises a second compressor, and the gas inlet end of the second compressor is selectively communicated with the second gas outlet and the gas outlet end of the second compressor is communicated with the second gas inlet; the third adsorption component further comprises a third compressor, and the air inlet end of the third compressor can be selectively communicated with the fourth air outlet, and the air outlet end of the third compressor is communicated with the third air inlet.
3. The reverse gas discharge recovery device for hydrogen production through pressure swing adsorption of claim 1, further comprising a gas storage component, wherein the gas storage component comprises a fourth buffer tank and a gas storage tank, a gas inlet end of the fourth buffer tank is selectively communicated with the sixth gas outlet, and the gas storage tank is selectively communicated with a gas outlet end of the fourth buffer tank.
4. The reverse off-gas recovery device for hydrogen production by pressure swing adsorption of claim 1, further comprising an inlet buffer tank, wherein the inlet end of the first compressor is selectively communicated with the outlet end of the inlet buffer tank.
5. The reverse off gas recovery device for hydrogen production by pressure swing adsorption of claim 1, further comprising a combustion furnace assembly, wherein the combustion furnace assembly comprises a gas combustion furnace, and the gas combustion furnace is selectively communicated with the first buffer tank and the second buffer tank.
CN201921876436.1U 2019-11-04 2019-11-04 Reverse-gas-release recovery device for pressure swing adsorption hydrogen production Expired - Fee Related CN210825419U (en)

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Application Number Priority Date Filing Date Title
CN201921876436.1U CN210825419U (en) 2019-11-04 2019-11-04 Reverse-gas-release recovery device for pressure swing adsorption hydrogen production

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201921876436.1U CN210825419U (en) 2019-11-04 2019-11-04 Reverse-gas-release recovery device for pressure swing adsorption hydrogen production

Publications (1)

Publication Number Publication Date
CN210825419U true CN210825419U (en) 2020-06-23

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CN201921876436.1U Expired - Fee Related CN210825419U (en) 2019-11-04 2019-11-04 Reverse-gas-release recovery device for pressure swing adsorption hydrogen production

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