CN215924396U - Device for preparing high-purity hydrogen from formaldehyde production tail gas - Google Patents
Device for preparing high-purity hydrogen from formaldehyde production tail gas Download PDFInfo
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- CN215924396U CN215924396U CN202122197644.2U CN202122197644U CN215924396U CN 215924396 U CN215924396 U CN 215924396U CN 202122197644 U CN202122197644 U CN 202122197644U CN 215924396 U CN215924396 U CN 215924396U
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Abstract
The utility model discloses a device for preparing high-purity hydrogen from tail gas produced in formaldehyde production, which comprises a tail gas inlet buffer tank, an inlet filter, a screw compressor, a gas cooler, a gas-liquid separator, a pretreatment temperature swing adsorption device, a pressurization compressor cooler, a pressurization compressor separator, a first-stage pressure swing adsorption device, a second-stage pressure swing adsorption device and a hydrogen compressor. The method has the advantages of short process route, less investment and easy popularization, can improve the economic and environmental benefits of formaldehyde production enterprises, solves the problems of environmental pollution and high operation cost which are urgently needed to be solved in the formaldehyde industry, achieves the purposes of saving energy, reducing loss, reducing cost, increasing income, eliminating pollution and the like, and simultaneously provides a route and a way for co-producing high-purity hydrogen in a formaldehyde plant.
Description
Technical Field
The utility model belongs to the technical field of chemical industry, and particularly relates to a device for preparing high-purity hydrogen from tail gas generated in formaldehyde production.
Background
In the prior art, part of tail gas is generated in the production of silver method formaldehyde, 600-700 Nm tail gas can be generated in each ton of formaldehyde, the part of tail gas contains 18-20% of hydrogen, 73-75% of nitrogen, 0.4-0.6% of carbon monoxide, 3.6-3.8% of carbon dioxide and a small amount of combustible gases such as methane, methanol and formaldehyde, and the gas is directly discharged to cause pollution to the environment and has certain explosion hazard.
Because the environment protection situation is more and more severe, enterprises are not allowed to directly exhaust or disorderly discharge tail gas generated in the formaldehyde production process, at present, the formaldehyde production enterprises consider recycling the gas, generally utilize the gas to directly combust to generate steam for heating, but the method only utilizes the heat value of the gas, the effective gas components are not fully utilized, and the resource is greatly wasted.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problems in the prior art and provide a device for preparing high-purity hydrogen from tail gas generated in formaldehyde production so as to overcome the defects in the prior art.
In order to achieve the aim, the utility model provides a device for preparing high-purity hydrogen from tail gas produced in formaldehyde production, which comprises a tail gas inlet buffer tank, an inlet filter, a screw compressor, a gas cooler, a gas-liquid separator, a pretreatment temperature swing adsorption device, a pressurization compressor cooler, a pressurization compressor separator, a first-stage pressure swing adsorption device, a second-stage pressure swing adsorption device and a hydrogen compressor;
the tail gas inlet buffer tank is connected with the inlet end of the inlet filter,
the inlet end of the screw compressor is connected with the outlet end of the inlet filter to remove trace solid particle impurities in the tail gas,
the inlet end of the gas cooler is connected with the outlet end of the screw compressor,
the inlet end of the gas-liquid separator is connected with the outlet end of the gas cooler to separate out liquid impurities carried in the gas,
the inlet end of the pretreatment temperature swing adsorption device is connected with the outlet end of the gas-liquid separator to remove a small amount of organic impurities in the tail gas,
the inlet end of the pressurizing compressor is connected with the outlet end of the pretreatment temperature swing adsorption device to further pressurize the gas,
the inlet end of the cooler of the pressurizing compressor is connected with the outlet end of the pressurizing compressor,
the inlet end of the separator of the pressure compressor is connected with the outlet end of the cooler of the pressure compressor to separate cooling water carried in the gas,
the inlet end of the first-stage pressure swing adsorption device is connected with the outlet of the pressure compressor separator, the purity of the hydrogen of the first-stage pressure swing adsorption device meets the industrial hydrogen requirement,
the inlet end of the second pressure swing adsorption device is connected with the outlet end of the first pressure swing adsorption device to further purify the hydrogen to meet the requirement of high-purity hydrogen,
the inlet end of the hydrogen compressor is connected with the outlet end of the second-stage pressure swing adsorption device, the outlet end of the hydrogen compressor is connected with a hydrogen loading crane pipe, purified hydrogen is pressurized to reach a loading pressure, and the purified hydrogen is compressed by the hydrogen and then is conveyed to a loading station for sale.
The method has the advantages of short process route, less investment and easy popularization, can improve the economic and environmental benefits of formaldehyde production enterprises, solves the problems of environmental pollution and high operation cost which are urgently needed to be solved in the formaldehyde industry, achieves the purposes of saving energy, reducing loss, reducing cost, increasing income, eliminating pollution and the like, and simultaneously provides a route and a way for co-producing high-purity hydrogen in a formaldehyde plant.
Drawings
Fig. 1 is a schematic structural view of the present invention.
In the figure: 1-tail gas inlet buffer tank, 2-inlet filter, 3-screw compressor, 4-gas cooler, 5-gas-liquid separator, 6-pretreatment temperature swing adsorption device, 7-pressurizing compressor, 8-pressurizing compressor cooler, 9-pressurizing compressor separator, 10-first-stage pressure swing adsorption device, 11-second-stage pressure swing adsorption device and 12-hydrogen compressor.
Detailed Description
Referring to fig. 1, the utility model provides a device for preparing high-purity hydrogen from tail gas produced in formaldehyde production, which comprises a tail gas inlet buffer tank 1, an inlet filter 2, a screw compressor 3, a gas cooler 4, a gas-liquid separator 5, a pretreatment temperature swing adsorption device 6, a pressurization compressor 7, a pressurization compressor cooler 8, a pressurization compressor separator 9, a first-stage pressure swing adsorption device 10, a second-stage pressure swing adsorption device 11 and a hydrogen compressor 12;
the tail gas inlet buffer tank 1 is connected with the inlet end of the inlet filter 2,
the inlet end of the screw compressor 3 is connected with the outlet end of the inlet filter 2 to remove the trace solid particle impurities in the tail gas,
the inlet end of the gas cooler 4 is connected with the outlet end of the screw compressor 3,
the inlet end of the gas-liquid separator 5 is connected with the outlet end of the gas cooler 4 to separate liquid impurities carried in the gas,
the inlet end of the pretreatment temperature swing adsorption device 6 is connected with the outlet end of the gas-liquid separator 5 to remove a small amount of organic impurities in the tail gas,
the inlet end of the pressurizing compressor 7 is connected with the outlet end of the pretreatment temperature swing adsorption device 6 to further pressurize the gas,
the inlet end of the pressurizing compressor cooler 8 is connected with the outlet end of the pressurizing compressor 7,
the inlet end of the separator 9 of the pressure compressor is connected with the outlet end of the cooler 8 of the pressure compressor to separate cooling water carried in the gas,
the inlet end of the first-stage pressure swing adsorption device 10 is connected with the outlet of the pressure compressor separator 9, the purity of the hydrogen of the first-stage pressure swing adsorption device meets the industrial hydrogen requirement,
the inlet end of the second pressure swing adsorption device 11 is connected with the outlet end of the first pressure swing adsorption device 10, further purifying hydrogen to meet the requirement of high-purity hydrogen,
the inlet end of the hydrogen compressor 12 is connected with the outlet end of the second-stage pressure swing adsorption device 11, the outlet end of the hydrogen compressor 12 is connected with a hydrogen loading crane pipe, purified hydrogen is pressurized to reach a loading pressure, and the purified hydrogen is compressed and then conveyed to a loading station for sale.
The method has the advantages of short process route, less investment and easy popularization, can improve the economic and environmental benefits of formaldehyde production enterprises, solves the problems of environmental pollution and high operation cost which are urgently needed to be solved in the formaldehyde industry, achieves the purposes of saving energy, reducing loss, reducing cost, increasing income, eliminating pollution and the like, and simultaneously provides a route and a way for co-producing high-purity hydrogen in a formaldehyde plant.
Claims (1)
1. The utility model provides a device of high-purity hydrogen of formaldehyde production tail gas system which characterized by: the system comprises a tail gas inlet buffer tank, an inlet filter, a screw compressor, a gas cooler, a gas-liquid separator, a pretreatment temperature swing adsorption device, a pressurization compressor cooler, a pressurization compressor separator, a first-stage pressure swing adsorption device, a second-stage pressure swing adsorption device and a hydrogen compressor;
the tail gas inlet buffer tank is connected with the inlet end of the inlet filter, the inlet end of the screw compressor is connected with the outlet end of the inlet filter, the inlet end of the gas cooler is connected with the outlet end of the screw compressor, the inlet end of the gas-liquid separator is connected with the outlet end of the gas-liquid separator, the inlet end of the pretreatment temperature swing adsorption device is connected with the outlet end of the pretreatment temperature swing adsorption device, the inlet end of the pressurization compressor cooler is connected with the outlet end of the pressurization compressor, the inlet end of the pressurization compressor separator is connected with the outlet end of the pressurization compressor cooler, the inlet end of the first-stage pressure swing adsorption device is connected with the outlet end of the pressurization compressor separator, the inlet end of the second-stage pressure swing adsorption device is connected with the outlet end of the first-stage pressure swing adsorption device, and the inlet end of the hydrogen compressor is connected with the outlet end of the second-stage pressure swing adsorption device, the outlet end of the hydrogen compressor is connected with a hydrogen loading crane pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122197644.2U CN215924396U (en) | 2021-09-13 | 2021-09-13 | Device for preparing high-purity hydrogen from formaldehyde production tail gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122197644.2U CN215924396U (en) | 2021-09-13 | 2021-09-13 | Device for preparing high-purity hydrogen from formaldehyde production tail gas |
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| CN215924396U true CN215924396U (en) | 2022-03-01 |
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| CN202122197644.2U Active CN215924396U (en) | 2021-09-13 | 2021-09-13 | Device for preparing high-purity hydrogen from formaldehyde production tail gas |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113582135A (en) * | 2021-09-13 | 2021-11-02 | 文亮 | Device and method for preparing high-purity hydrogen from formaldehyde production tail gas |
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2021
- 2021-09-13 CN CN202122197644.2U patent/CN215924396U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113582135A (en) * | 2021-09-13 | 2021-11-02 | 文亮 | Device and method for preparing high-purity hydrogen from formaldehyde production tail gas |
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