CN203065153U - Hydrogen recovery device for hydrogen-containing mixed tail gas - Google Patents
Hydrogen recovery device for hydrogen-containing mixed tail gas Download PDFInfo
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- CN203065153U CN203065153U CN 201320002829 CN201320002829U CN203065153U CN 203065153 U CN203065153 U CN 203065153U CN 201320002829 CN201320002829 CN 201320002829 CN 201320002829 U CN201320002829 U CN 201320002829U CN 203065153 U CN203065153 U CN 203065153U
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Abstract
The utility model discloses a hydrogen recovery device for hydrogen-containing mixed tail gas, which belongs to a chemical engineering tail gas recovery device. The chemical engineering tail gas recovery device comprises a first separator, a multi-channel heat exchanger, a nitrogen compressor, a nitrogen cooler, an expansion machine, a first throttling valve, a second separator, a second throttling valve and a connecting pipe. The temperature of the hydrogen-containing mixed tail gas is cooled to -1850 DEG C step by step under the condition of constant pressure according to the difference of boiling points of hydrogen, nitrogen and methane, so that the methane and the nitrogen with higher boiling points in the hydrogen-containing mixed tail gas are liquefied step by step and then are separated step by step, and the separated liquid methane and liquid nitrogen are throttled and then return to the multi-channel heat exchanger for generating latent heat of vaporization so as to supply main cool flow for the device; the hydrogen and the nitrogen which are not liquefied are reheated by the multi-channel heat exchanger for supplying cool flow, and then serve as products to be sent out of the device. The cool flow loss of the device is supplemented through the nitrogen circulation and the refrigeration of the expansion machine. The pressure of the hydrogen recycled by the device can be up to 4.8Mpa, the purity of the hydrogen can be up to above 90%, and the hydrogen can be used as feed gas of chemical plants.
Description
Technical field
The utility model relates to the chemical industry tail gas retrieving arrangement, specifically is a kind of hydrogeneous mixed tail gas hydrogen gas recovering device.
Background technology
At present: some hydrogeneous mixed tail gas of chemical plant, wherein the volume content of hydrogen, nitrogen, methane is respectively about 50%, 35%, 15%, and pressure is 5MPa.Traditional way is directly this part hydrogeneous mixed tail gas to be sent to roasting kiln to produce a part of steam.It is extremely uneconomical that the hydrogeneous mixed tail gas that burns is produced steam, causes certain waste.
Summary of the invention
For overcoming the above-mentioned deficiency of prior art, the utility model provides a kind of hydrogeneous mixed tail gas hydrogen gas recovering device.
The utility model is realized with following technical scheme: a kind of hydrogeneous mixed tail gas hydrogen gas recovering device, and it comprises first separator, multi-channel heat exchanger, nitrogen compressor, nitrogen cooler, decompressor, first throttle valve, second separator, second throttling valve and connecting tube; Described multi-channel heat exchanger comprises heat exchanger channels A, heat exchanger channels B, heat exchanger channels C, heat exchanger channels D, heat exchanger channels E, heat exchanger channels F and seven heat exchanger channels of heat exchanger channels G and mixing tank, and mixing tank is installed between heat exchanger channels G and the heat exchanger channels C; One input channel is connected with multi-channel heat exchanger heat exchanger channels A; The first separator top, one side is connected with the heat exchanger channels A of multi-channel heat exchanger by pipeline; The top of first separator is connected with the heat exchanger channels F of multi-channel heat exchanger by pipeline, and the heat exchanger channels F of multi-channel heat exchanger is connected with top one side of second separator by pipeline again; Bottom one side of first separator or bottom are connected with the heat exchanger channels C of multi-channel heat exchanger by pipeline, at its connecting tube the first throttle valve are installed; The top of second separator is connected with the heat exchanger channels B of multi-channel heat exchanger by pipeline, and the heat exchanger channels B of multi-channel heat exchanger is connected with output channel again; Bottom one side of second separator or bottom are connected with the heat exchanger channels G of multi-channel heat exchanger by pipeline, at its connecting tube second throttling valve are installed; The heat exchanger channels G of multi-channel heat exchanger is connected with the heat exchanger channels C of multi-channel heat exchanger by the mixing tank of multi-channel heat exchanger again, and the heat exchanger channels C of multi-channel heat exchanger is connected with another output channel again; The heat exchanger channels D of multi-channel heat exchanger is connected with nitrogen compressor by pipeline, be connected with nitrogen cooler by pipeline then, nitrogen cooler is connected with the heat exchanger channels E of multi-channel heat exchanger by pipeline, be connected with decompressor by pipeline then, decompressor is connected with the heat exchanger channels D of multi-channel heat exchanger by pipeline.
Adopt the way of nitrogen circulation, expander refrigeration supplementary device loss of refrigeration capacity, boiling point difference according to hydrogen, nitrogen and methane, the temperature of hydrogeneous mixed tail gas is cooled to-185 ℃ step by step under isopiestic state, higher methane and the nitrogen of boiling point in the hydrogeneous mixed tail gas is progressively liquefied, separate step by step then, return multi-channel heat exchanger after liquid methane after the separation and the liquid nitrogen throttling and produce the latent heat of vaporization, for device provides main cold.The hydrogen that is not liquefied and nitrogen are sent this device as product after providing cold by the multi-channel heat exchanger re-heat.The loss of refrigeration capacity of device is replenished by nitrogen circulation, expander refrigeration.The hydrogen pressure that this device reclaims out can be up to 4.8MPa, and purity can reach more than 90%, and the unstripped gas that can be used as the chemical plant uses.
Description of drawings
Fig. 1 is the structural representation of hydrogeneous mixed tail gas hydrogen gas recovering device.
Among the figure: 1, first separator, 2, multi-channel heat exchanger, 2.1, heat exchanger channels A, 2.2, heat exchanger channels B, 2.3, heat exchanger channels C, 2.4, heat exchanger channels D, 2.5, heat exchanger channels E, 2.6, heat exchanger channels F, 2.7, heat exchanger channels G, 2.8, mixing tank, 3, nitrogen compressor, 4, nitrogen cooler, 5, decompressor, 6, second throttling valve, 7, second separator, 8, the first throttle valve.
Embodiment
As shown in Figure 1, hydrogeneous mixed tail gas hydrogen gas recovering device described in the utility model is made up of first separator 1, multi-channel heat exchanger 2, nitrogen compressor 3, nitrogen cooler 4, decompressor 5, first throttle valve 8, second separator 7, second throttling valve 6 and pipeline.Multi-channel heat exchanger 2 wherein is made of heat exchanger channels A2.1, heat exchanger channels B2.2, heat exchanger channels C2.3, heat exchanger channels D2.4, heat exchanger channels E2.5, heat exchanger channels F2.6, seven heat exchanger channels of heat exchanger channels G2.7 and mixing tank 2.8.Input channel shown in the arrow is connected with the heat exchanger channels A2.1 of multi-channel heat exchanger 2, is connected with top one side of first separator 1 by pipeline then.First separator, 1 top is connected with the heat exchanger channels F2.6 of multi-channel heat exchanger 2 by pipeline, is connected with top one side of second separator 7 by pipeline then.The top of second separator 7 is connected with the heat exchanger channels B2.2 of multi-channel heat exchanger 2 by pipeline, goes out device by pipeline then.Bottom one side or the bottom of first separator 1 are connected with first throttle valve 8 by pipeline, are connected with the heat exchanger channels C2.3 of multi-channel heat exchanger 2 by pipeline then, go out device by another pipeline then.Second separator 7 bottoms, one side or bottom are connected with second throttling valve 6 by pipeline, be connected with the heat exchanger channels G2.7 of multi-channel heat exchanger 2 by pipeline then, the mixing tank 2.8 by multi-channel heat exchanger 2 is connected with the heat exchanger channels C2.3 of multi-channel heat exchanger 2 then.The heat exchanger channels D2.4 of multi-channel heat exchanger 2 is connected with nitrogen compressor 3 by pipeline, be connected with nitrogen cooler 4 by pipeline then, nitrogen cooler 4 is connected with the heat exchanger channels E2.5 of multi-channel heat exchanger 2 by pipeline, be connected with decompressor 5 by pipeline then, decompressor 5 is connected with the heat exchanger channels D2.4 of multi-channel heat exchanger 2 by pipeline.
Its flow process is: the heat exchanger channels A2.1 that hydrogeneous mixed tail gas enters multi-channel heat exchanger 2 by precooling after, a part of methane and nitrogen in the hydrogeneous mixed tail gas are liquefied, enter first separator 1 then and separate, export after the heat exchanger channels C2.3 vaporization that the liquid methane after the separation and liquid nitrogen enter multi-channel heat exchanger 2 after by first throttle valve 8 provides cold.The methane that hydrogeneous mixed tail gas is not liquefied and nitrogen go out the heat exchanger channels F2.6 continuation cooling that enters multi-channel heat exchanger 2 behind first separator 1, methane after being liquefied and nitrogen enter second separator 7 to be separated, and the heat exchanger channels G2.7 vaporization that the liquid methane after the separation and liquid nitrogen enter multi-channel heat exchanger 2 after by second throttling valve 6 provides the heat exchanger channels C2.3 that enters multi-channel heat exchanger 2 behind the cold by the mixing tank 2.8 of multi-channel heat exchanger 2.The hydrogen that is not liquefied in the hydrogeneous mixed tail gas and nitrogen go out to be exported after the heat exchanger channels B2.2 re-heat that enters multi-channel heat exchanger 2 behind second separator 7 provides cold.The nitrogen of nitrogen compressor 3 outputs enters decompressor 5 after entering the heat exchanger channels E2.5 precooling that enters multi-channel heat exchanger 2 after nitrogen cooler 4 cools off, enter the heat exchanger channels D2.4 of multi-channel heat exchanger 2 after expansion, step-down, the cooling, enter nitrogen compressor 3 then.
Claims (1)
1. hydrogeneous mixed tail gas hydrogen gas recovering device, it comprises first separator (1), multi-channel heat exchanger (2), nitrogen compressor (3), nitrogen cooler (4), decompressor (5), first throttle valve (8), second separator (7), second throttling valve (6) and connecting tube; Described multi-channel heat exchanger (2) comprises heat exchanger channels A(2.1), heat exchanger channels B(2.2), heat exchanger channels C(2.3), heat exchanger channels D(2.4), heat exchanger channels E(2.5), heat exchanger channels F(2.6) and heat exchanger channels G(2.7) seven heat exchanger channels and mixing tanks (2.8), mixing tank (2.8) is installed in heat exchanger channels G(2.7) and heat exchanger channels C(2.3) between; One input channel and multi-channel heat exchanger (2) heat exchanger channels A(2.1) be connected; First separator (1) top, one side is connected with the heat exchanger channels A (2.1) of multi-channel heat exchanger (2) by pipeline; The top of first separator (1) is by the heat exchanger channels F(2.6 of pipeline with multi-channel heat exchanger (2)) be connected the heat exchanger channels F(2.6 of multi-channel heat exchanger (2)) be connected with top one side of second separator (7) by pipeline again; Bottom one side of first separator (1) or bottom are by the heat exchanger channels C(2.3 of pipeline with multi-channel heat exchanger (2)) be connected, at its connecting tube first throttle valve (8) is installed; The top of second separator (7) is connected with the heat exchanger channels B (2.2) of multi-channel heat exchanger (2) by pipeline, and the heat exchanger channels B (2.2) of multi-channel heat exchanger is connected with output channel again; Bottom one side of second separator (7) or bottom are by the heat exchanger channels G(2.7 of pipeline with multi-channel heat exchanger (2)) be connected, at its connecting tube second throttling valve (6) is installed; The heat exchanger channels G(2.7 of multi-channel heat exchanger) again by the mixing tank (2.8) of multi-channel heat exchanger 2 and the heat exchanger channels C(2.3 of multi-channel heat exchanger (2)) be connected the heat exchanger channels C(2.3 of multi-channel heat exchanger (2)) be connected with another output channel again; The heat exchanger channels D(2.4 of multi-channel heat exchanger (2)) is connected with nitrogen compressor (3) by pipeline, be connected with nitrogen cooler (4) by pipeline then, nitrogen cooler (4) is by the heat exchanger channels E(2.5 of pipeline with multi-channel heat exchanger (2)) be connected, be connected with decompressor (5) by pipeline then, decompressor is by the heat exchanger channels D(2.4 of pipeline with multi-channel heat exchanger (2)) be connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320002829 CN203065153U (en) | 2013-01-04 | 2013-01-04 | Hydrogen recovery device for hydrogen-containing mixed tail gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320002829 CN203065153U (en) | 2013-01-04 | 2013-01-04 | Hydrogen recovery device for hydrogen-containing mixed tail gas |
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| CN203065153U true CN203065153U (en) | 2013-07-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201320002829 Expired - Fee Related CN203065153U (en) | 2013-01-04 | 2013-01-04 | Hydrogen recovery device for hydrogen-containing mixed tail gas |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103925770A (en) * | 2013-08-26 | 2014-07-16 | 贵州兴化化工股份有限公司 | Hydrogen recovery method |
| CN109437106A (en) * | 2018-12-26 | 2019-03-08 | 浙江海畅气体有限公司 | A kind of hydrogen purification device |
-
2013
- 2013-01-04 CN CN 201320002829 patent/CN203065153U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103925770A (en) * | 2013-08-26 | 2014-07-16 | 贵州兴化化工股份有限公司 | Hydrogen recovery method |
| CN109437106A (en) * | 2018-12-26 | 2019-03-08 | 浙江海畅气体有限公司 | A kind of hydrogen purification device |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130717 Termination date: 20140104 |