CN219399558U - Vacuum analysis tail gas recovery structure - Google Patents
Vacuum analysis tail gas recovery structure Download PDFInfo
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- CN219399558U CN219399558U CN202320677158.7U CN202320677158U CN219399558U CN 219399558 U CN219399558 U CN 219399558U CN 202320677158 U CN202320677158 U CN 202320677158U CN 219399558 U CN219399558 U CN 219399558U
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Abstract
The utility model relates to a vacuum analysis tail gas recovery structure, which comprises a plurality of adsorption towers which are correspondingly arranged, wherein the adsorption towers are arranged in parallel and are combined to form a multi-tower sectional type tail gas adsorption structure; the multi-tower sectional type tail gas adsorption structure is used as a raw gas treatment part, the adsorption tower comprises an internal adsorption bed layer for adsorbing impurity gas, and hydrogen contained in gas raw materials for adsorbing the impurity gas floats to the top of the adsorption tower to form a product boundary region conveying structure; the adsorption tower is correspondingly provided with a reverse discharge analytic gas collecting part; the adsorption tower is also correspondingly provided with a vacuum extraction part matched with the internal adsorption bed layer.
Description
Technical Field
The utility model relates to the technical field of hydrogen production technology and hydrogen production equipment, in particular to a vacuum analysis tail gas recovery structure.
Background
Pressure swing adsorption hydrogen extraction is a purification technology for achieving adsorption and regeneration through pressure change, and normal pressure analysis or vacuum analysis is usually adopted:
and (3) normal pressure analysis process: taking a part of uniform pressure gas as a purging regeneration gas source, and introducing 82% -85% of pressure swing adsorption recovery rate; the recovery rate is low, so that the hydrogen cost of the produced gas is high, the analysis gas is divided into reverse bleed gas and purge gas, the purity of the hydrogen of the reverse bleed gas and the purge gas is about 30%, and the tail gas can be collected by a collecting tank and then supplied to a heat conduction oil furnace system for heat supply, so that the purpose of reducing the fuel cost is achieved;
and (3) vacuum analysis process: the aim of regenerating the adsorption tower is achieved in a vacuumizing mode, and compared with normal pressure analysis, the method saves purge gas, so that the recovery rate is high, the recovery rate can reach 90% -92%, and analysis gas is divided into reverse bleed gas and vacuumizing gas, and is generally discharged directly from high altitude or enters a torch for discharge due to low heat value.
The pressure swing adsorption hydrogen extraction at the present stage has low hydrogen recovery rate, and the direct emptying causes the waste of part of high-calorific-value fuel.
Therefore, it is necessary to provide a vacuum desorption tail gas recovery structure to solve the above problems.
Disclosure of Invention
The utility model aims to provide a vacuum analysis tail gas recovery structure.
The technical proposal is as follows:
a vacuum analysis tail gas recovery structure comprises a plurality of adsorption towers which are correspondingly arranged, wherein the adsorption towers are arranged in parallel and combined to form a multi-tower sectional type tail gas adsorption structure;
the multi-tower sectional type tail gas adsorption structure is used as a raw gas treatment part, the adsorption tower comprises an internal adsorption bed layer for adsorbing impurity gas, and hydrogen contained in gas raw materials for adsorbing the impurity gas floats to the top of the adsorption tower to form a product boundary region conveying structure;
the adsorption tower is correspondingly provided with a reverse discharge analytic gas collecting part;
the adsorption tower is also correspondingly provided with a vacuum extraction part matched with the internal adsorption bed layer.
Further, the number of the adsorption towers is six.
Further, the plurality of adsorption towers at least comprise a main adsorption part, three pressure equalizing parts and a vacuumizing regeneration part.
Further, the multi-tower sectional type tail gas adsorption structure is correspondingly provided with a raw material gas buffer tank.
Further, the reverse discharge analysis gas collection unit includes an inversion gas buffer tank.
Further, after the adsorption tower is saturated, the adsorption tower is regenerated; the adsorption tower is subjected to pressure equalizing and depressurization to recover part of high-purity product gas, then the high-purity product gas is reversely discharged, and after the reversely discharged analysis gas is collected and stabilized in pressure through an analysis gas buffer tank, the pressure is regulated at 20-30KPa through a regulating valve to be conveyed to a combustion system for supplementary combustion.
Further, the reverse discharge is controlled by an independent program control valve to be opened and closed.
Further, the vacuum extraction part comprises a vacuum pump, and the vacuum pump is matched with an evacuation pipeline or a burning torch.
Compared with the prior art, the method has the advantages that the analysis gas is collected in a segmented mode, the reverse bleed gas with higher purity is collected and stabilized through the analysis gas buffer tank and then is sent to the heat conduction oil furnace system for back burning, the consumption of the fuel natural gas is reduced, the hydrogen recovery rate is effectively improved, meanwhile, the vacuumizing analysis gas with lower purity is conveyed to the back burning, and the fuel cost is reduced.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
Detailed Description
Examples:
referring to fig. 1, the present embodiment shows a vacuum analysis tail gas recovery structure, which includes a plurality of adsorption towers 1 correspondingly arranged, and a plurality of adsorption towers 1 are arranged in parallel to form a multi-tower sectional type tail gas adsorption structure 100;
the multi-tower sectional type tail gas adsorption structure 100 is used as a raw gas 10 treatment part, the adsorption tower 1 comprises an internal adsorption bed layer for adsorbing impurity gas, hydrogen contained in gas raw materials for adsorbing the impurity gas floats to the top of the adsorption tower 1 to form a product boundary region conveying structure 200, and the product boundary region conveying structure 200 comprises a hydrogen buffer tank 201 and is conveyed to a product boundary region 202;
the adsorption tower 1 is correspondingly provided with a reverse discharge analysis gas collection part 300;
the adsorption tower 1 is also provided with a vacuum extraction part 400 which is matched with the inner adsorption bed layer.
The number of the adsorption towers 1 is six.
The adsorption towers 1 at least comprise a main adsorption part, three pressure equalizing parts and a vacuumizing regeneration part.
The multi-tower sectional type tail gas adsorption structure is correspondingly provided with a raw material gas buffer tank 2.
The reverse discharge analysis gas collection unit 300 includes an inversion gas buffer tank 3.
The adsorption tower 1 is regenerated after adsorption saturation; the adsorption tower 1 is subjected to pressure equalizing and depressurization to recover part of high-purity product gas, then the high-purity product gas is reversely discharged, and after the reversely discharged analysis gas is collected and stabilized in pressure through the analysis gas buffer tank 3, the pressure is regulated at 20-30KPa through the regulating valve to be conveyed to the combustion system A for supplementary combustion.
The reverse discharge is controlled by an independent program control valve to be opened and closed.
The vacuum extractor 400 includes a vacuum pump 4, the vacuum pump 4 being used in conjunction with an evacuation line or combustion torch B.
Compared with the prior art, the method has the advantages that the analysis gas is collected in a segmented mode, the reverse bleed gas with higher purity is collected and stabilized through the analysis gas buffer tank and then is sent to the heat conduction oil furnace system for back burning, the consumption of the fuel natural gas is reduced, the hydrogen recovery rate is effectively improved, meanwhile, the vacuumizing analysis gas with lower purity is conveyed to the back burning, and the fuel cost is reduced.
What has been described above is merely some embodiments of the present utility model. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit of the utility model.
Claims (8)
1. The utility model provides a vacuum analysis tail gas recovery structure which characterized in that: the device comprises a plurality of adsorption towers which are correspondingly arranged, wherein the adsorption towers are arranged in parallel and combined to form a multi-tower sectional type tail gas adsorption structure;
the multi-tower sectional type tail gas adsorption structure is used as a raw gas treatment part, the adsorption tower comprises an internal adsorption bed layer for adsorbing impurity gas, and hydrogen contained in gas raw materials for adsorbing the impurity gas floats to the top of the adsorption tower to form a product boundary region conveying structure;
the adsorption tower is correspondingly provided with a reverse discharge analytic gas collecting part;
the adsorption tower is also correspondingly provided with a vacuum extraction part matched with the internal adsorption bed layer.
2. The vacuum analysis exhaust gas recovery structure according to claim 1, wherein: the number of the adsorption towers is six.
3. The vacuum analysis exhaust gas recovery structure according to claim 2, wherein: the adsorption towers at least comprise a main adsorption part, three pressure equalizing parts and a vacuumizing regeneration part.
4. A vacuum resolving exhaust gas recovery structure according to claim 3, wherein: the multi-tower sectional type tail gas adsorption structure is correspondingly provided with a raw material gas buffer tank.
5. The vacuum analysis exhaust gas recovery structure according to claim 4, wherein: the reverse discharge analysis gas collection part comprises an inversion gas buffer tank.
6. The vacuum analysis exhaust gas recovery structure according to claim 5, wherein: after the adsorption tower is saturated, regenerating; the adsorption tower is subjected to pressure equalizing and depressurization to recover part of high-purity product gas, then the high-purity product gas is reversely discharged, and after the reversely discharged analysis gas is collected and stabilized in pressure through an analysis gas buffer tank, the pressure is regulated at 20-30KPa through a regulating valve to be conveyed to a combustion system for supplementary combustion.
7. The vacuum analysis exhaust gas recovery structure according to claim 6, wherein: the reverse discharge is controlled by an independent program control valve to be opened and closed.
8. The vacuum analysis exhaust gas recovery structure according to claim 7, wherein: the vacuum extraction part comprises a vacuum pump, and the vacuum pump is matched with the emptying pipeline or the burning torch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320677158.7U CN219399558U (en) | 2023-03-31 | 2023-03-31 | Vacuum analysis tail gas recovery structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320677158.7U CN219399558U (en) | 2023-03-31 | 2023-03-31 | Vacuum analysis tail gas recovery structure |
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| CN219399558U true CN219399558U (en) | 2023-07-25 |
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| CN202320677158.7U Active CN219399558U (en) | 2023-03-31 | 2023-03-31 | Vacuum analysis tail gas recovery structure |
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- 2023-03-31 CN CN202320677158.7U patent/CN219399558U/en active Active
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