CN216499407U - Adsorbent regeneration system for CO temperature swing adsorption system under negative pressure - Google Patents
Adsorbent regeneration system for CO temperature swing adsorption system under negative pressure Download PDFInfo
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- CN216499407U CN216499407U CN202122768454.1U CN202122768454U CN216499407U CN 216499407 U CN216499407 U CN 216499407U CN 202122768454 U CN202122768454 U CN 202122768454U CN 216499407 U CN216499407 U CN 216499407U
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Abstract
The utility model provides an adsorbent regeneration system for a CO temperature swing adsorption system under negative pressure, which comprises a regenerated nitrogen pipeline connected with a product outlet pipeline of a temperature swing adsorption tower, wherein the regenerated nitrogen pipeline is connected with a nitrogen outlet pipe of an air separation device, and a hot water preheater, a steam preheater and an electric preheater are sequentially connected onto the regenerated nitrogen pipeline from the air separation device to the temperature swing adsorption tower; the raw material gas inlet pipeline of the temperature swing adsorption tower is connected with a regenerated nitrogen outlet pipeline, a water cooler and a vacuum pump are sequentially arranged on the regenerated nitrogen outlet pipeline, and the outlet of the vacuum pump is connected with two pipelines which are respectively a blow-down pipe circulating nitrogen pipe. The utility model has the advantages of ingenious structural design, simple structure, low cost and convenient operation, and has good desorption and regeneration effects of the temperature swing adsorbent.
Description
Technical Field
The utility model relates to an adsorbent regeneration system for a CO temperature swing adsorption system under negative pressure, belonging to the field of negative pressure regeneration devices of temperature swing adsorption towers.
Background
Carbon monoxide is an important industrial raw material gas, and is a colorless, tasteless and nonirritating asphyxiating gas at normal temperature, and is also an inflammable, explosive and toxic dangerous gas. However, the hydrogen sulfide, the carbon oxysulfide and the carbon dioxide are removed by the desulfurization device, and the content of oxygen, moisture and oxidizing gas in the gas is controlled in the whole process, so that the catalyst selectivity and the product yield of the subsequent process are greatly influenced, the oxygen, moisture and oxidizing gas in the carbon monoxide product gas must be removed by a temperature swing adsorption method, and then the temperature swing adsorbent is desorbed and regenerated, so that the production is discontinuous in operation and periodic switching during cyclic use, positive pressure and gradual pressure reduction in the temperature swing adsorption tower are utilized to desorb substances such as moisture, oxygen and the like, and the regeneration is incomplete, so that harmful impurities in the temperature swing adsorbent are not completely removed, the pressure difference is increased in the subsequent process when the temperature swing adsorbent is operated again, side reactions are accelerated, potential safety hazards are formed, and the production stability is seriously influenced. Therefore, the method has important significance for adjusting the pressure working condition in the temperature swing adsorption tower during regeneration.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems, the utility model discloses an adsorbent regeneration system for a CO temperature swing adsorption system under negative pressure, which utilizes waste nitrogen discharged from a unit air separation device as a regeneration air source, takes nitrogen as a carrier gas as a regeneration air source, brings heat into the waste nitrogen, and removes adsorbed substances by heating the temperature swing adsorbent. Meanwhile, the relative pressure is changed, and the adsorbate is removed by reducing the pressure in the adsorption tank and carrying out nitrogen back flushing.
In order to achieve the purpose, the technical scheme of the utility model is as follows:
an adsorbent regeneration system for a CO temperature swing adsorption system under negative pressure comprises a regeneration nitrogen pipeline connected with a product outlet pipeline of a temperature swing adsorption tower through a three-way joint, wherein the regeneration nitrogen pipeline is connected with a nitrogen outlet pipe of an air separation device, and a hot water preheater, a steam preheater and an electric preheater are sequentially connected onto the regeneration nitrogen pipeline from the air separation device to the temperature swing adsorption tower; connect regeneration nitrogen gas outlet pipe way through three way connection on the feed gas inlet pipe way of temperature swing adsorption tower, water cooler and vacuum pump have set gradually on the regeneration nitrogen gas outlet pipe way, two way pipelines are connected in the exit of vacuum pump, respectively for blow-down pipe and with the circulation nitrogen gas pipe of regeneration nitrogen gas pipe connection, be provided with the pneumatic stop valve of product export on the product outlet pipe way of temperature swing adsorption tower, electric pre-heater with be provided with on the pipeline between the temperature swing adsorption tower and let in the pneumatic stop valve of nitrogen gas, be provided with the pneumatic stop valve of feed gas on the feed gas inlet pipe way of temperature swing adsorption tower, be provided with the pneumatic stop valve of emission nitrogen gas on the regeneration nitrogen gas outlet pipe way.
Furthermore, the temperature swing adsorption tower comprises a temperature swing adsorption tower A and a temperature swing adsorption tower B, the temperature swing adsorption tower A and the temperature swing adsorption tower B are in parallel connection, and correspondingly, the two product outlet pneumatic stop valves are respectively connected with the temperature swing adsorption tower A and the temperature swing adsorption tower B; two pneumatic stop valves for introducing nitrogen are arranged and are respectively connected with the temperature swing adsorption tower A and the temperature swing adsorption tower B; the two feed gas pneumatic stop valves are respectively connected with the temperature swing adsorption tower A and the temperature swing adsorption tower B; two pneumatic stop valves for discharging nitrogen are arranged and are respectively connected with the temperature swing adsorption tower A and the temperature swing adsorption tower B.
Furthermore, valves are respectively arranged on the emptying pipe and the circulating nitrogen pipe.
The utility model has the beneficial effects that:
the utility model has the advantages of ingenious overall structural design, simple structure, low cost and convenient operation, and has good desorption and regeneration effects of the temperature swing adsorbent; the system is convenient to maintain and replace, low in cost, good in negative pressure desorption effect, simple to operate and easy to control; the waste nitrogen discharged from the unit air separation device is used as a regeneration air source, resources are fully utilized, meanwhile, the water cooler in front of the vacuum pump recovers heat of the regeneration air source, produced hot water is merged into public works, heat energy is saved, the discharge pipeline of the vacuum pump is provided with the discharge pipe of the bypass, and the discharged nitrogen can be led to the regeneration air inlet through the circulating nitrogen pipe under the control of the valve for recycling.
Drawings
FIG. 1 is a method and process for regeneration of a CO temperature swing adsorption system under negative pressure;
in the figure: 1. a product outlet conduit; 2. a regenerated nitrogen pipeline; 3. an air separation plant; 4. a hot water preheater; 5. a steam preheater; 6. an electric preheater; 7. a feed gas inlet pipeline; 8. a regenerated nitrogen outlet pipeline; 9. a water cooler; 10. a vacuum pump; 11. an emptying pipe; 12. a circulating nitrogen pipe; 13. a product outlet pneumatic stop valve; 14. introducing a nitrogen pneumatic stop valve; 15. a raw gas pneumatic stop valve; 16. a pneumatic stop valve for discharging nitrogen; 17. a temperature swing adsorption tower A; 18. a temperature swing adsorption tower B; 19. and (4) a valve.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments.
As shown in fig. 1, the adsorbent regeneration system for a CO temperature swing adsorption system under negative pressure of the present invention includes a regenerated nitrogen pipeline 2 connected to a product outlet pipeline 1 of a temperature swing adsorption tower through a three-way joint, the regenerated nitrogen pipeline is connected to a nitrogen outlet pipe of an air separation unit 3, and the regenerated nitrogen pipeline is sequentially connected to a hot water preheater 4, a steam preheater 5, and an electric preheater 6 from the air separation unit 3 to the temperature swing adsorption tower; connect regeneration nitrogen gas outlet pipe way 8 through three way connection on temperature swing adsorption tower's the feed gas inlet pipe way 7, water cooler 9 and vacuum pump 10 have set gradually on the regeneration nitrogen gas outlet pipe way, two way pipelines are connected in the exit of vacuum pump, respectively for blow-down pipe 11 and with regeneration nitrogen gas pipe 12 that the nitrogen gas pipeline is connected, be provided with the pneumatic stop valve 13 of product outlet on the product outlet pipe way of temperature swing adsorption tower, electric preheater with be provided with on the pipeline between the temperature swing adsorption tower and let in nitrogen gas pneumatic stop valve 14, be provided with feed gas pneumatic stop valve 15 on the feed gas inlet pipe way of temperature swing adsorption tower, be provided with on the regeneration nitrogen gas outlet pipe way and discharge nitrogen gas pneumatic stop valve 16.
In this embodiment, the temperature swing adsorption tower is provided with two temperature swing adsorption towers, including a temperature swing adsorption tower a17 and a temperature swing adsorption tower B18, and the temperature swing adsorption tower a and the temperature swing adsorption tower B are in a parallel structure, so that when the temperature swing adsorption tower a operates, the temperature swing adsorption tower B performs desorption regeneration, and when the temperature swing adsorption tower B operates, the temperature swing adsorption tower a performs desorption regeneration, and correspondingly, the product outlet pneumatic stop valves are provided with two product outlet pneumatic stop valves, and are respectively connected with the temperature swing adsorption tower a and the temperature swing adsorption tower B; two pneumatic stop valves for introducing nitrogen are arranged and are respectively connected with the temperature swing adsorption tower A and the temperature swing adsorption tower B; the two feed gas pneumatic stop valves are respectively connected with the temperature swing adsorption tower A and the temperature swing adsorption tower B; two pneumatic stop valves for discharging nitrogen are arranged and are respectively connected with the temperature swing adsorption tower A and the temperature swing adsorption tower B.
In this embodiment, the emptying pipe and the circulating nitrogen pipe are respectively provided with a valve 19.
The utility model adopts the polluted nitrogen as the regeneration medium, the chemical property of the gas is stable, no dust impurities exist, and the problem that the electric heating element is overheated and damaged due to overlarge thermal resistance caused by the long-term dust accumulation in the device is solved.
The utility model can improve the regeneration effect of the temperature swing adsorbent, the adsorption efficiency reaches more than 99 percent after the temperature swing adsorbent is put into use, the volume ratio of trace harmful gases such as oxygen, carbon dioxide, moisture and the like in the product gas is reduced, and the phenomenon of side reaction in the subsequent process is controlled.
The tail gas after regeneration is cooled by the water cooler and then is exhausted, hot water after heat exchange with the tail gas can be used for other production activities, energy is fully utilized, the exhaust pipe of the bypass is arranged on the outlet pipeline of the vacuum pump, and the exhausted gas of the regenerated gas can be led to the regenerated gas inlet through valve control for cyclic utilization.
The principle of the utility model adopting nitrogen as carrier gas is as follows: 1. nitrogen is used as a carrier gas to carry heat and remove adsorbed species by heating the temperature swing adsorbent. 2. The relative pressure is changed, and the adsorbate is removed by reducing the pressure in the adsorption tank and carrying out nitrogen back flushing. The adsorbate of the utility model: namely carbon dioxide and water. The nitrogen source in the utility model is waste nitrogen of the air separation system, and the energy-saving and emission-reducing idea of making the best use of things is realized.
It should be noted that the above-mentioned embodiments are merely preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and all equivalent changes made on the basis of the above-mentioned embodiments are within the scope of the present invention.
Claims (3)
1. An adsorbent regeneration system for a CO temperature swing adsorption system under negative pressure is characterized by comprising a regenerated nitrogen pipeline connected with a product outlet pipeline of a temperature swing adsorption tower through a three-way joint, wherein the regenerated nitrogen pipeline is connected with a nitrogen outlet pipe of an air separation device, and a hot water preheater, a steam preheater and an electric preheater are sequentially connected onto the regenerated nitrogen pipeline from the air separation device to the temperature swing adsorption tower; connect regeneration nitrogen gas outlet pipe way through three way connection on the feed gas inlet pipe way of temperature swing adsorption tower, water cooler and vacuum pump have set gradually on the regeneration nitrogen gas outlet pipe way, two way pipelines are connected in the exit of vacuum pump, respectively for blow-down pipe and with the circulation nitrogen gas pipe of regeneration nitrogen gas pipe connection, be provided with the pneumatic stop valve of product export on the product outlet pipe way of temperature swing adsorption tower, electric pre-heater with be provided with on the pipeline between the temperature swing adsorption tower and let in the pneumatic stop valve of nitrogen gas, be provided with the pneumatic stop valve of feed gas on the feed gas inlet pipe way of temperature swing adsorption tower, be provided with the pneumatic stop valve of emission nitrogen gas on the regeneration nitrogen gas outlet pipe way.
2. The system for regenerating an adsorbent used in a CO temperature swing adsorption system under negative pressure as claimed in claim 1, wherein there are two temperature swing adsorption columns, comprising a temperature swing adsorption column a and a temperature swing adsorption column B, which are connected in parallel, and accordingly, there are two pneumatic stop valves for product outlet, which are respectively connected to the temperature swing adsorption column a and the temperature swing adsorption column B; two pneumatic stop valves for introducing nitrogen are arranged and are respectively connected with the temperature swing adsorption tower A and the temperature swing adsorption tower B; the two feed gas pneumatic stop valves are respectively connected with the temperature swing adsorption tower A and the temperature swing adsorption tower B; two pneumatic stop valves for discharging nitrogen are arranged and are respectively connected with the temperature swing adsorption tower A and the temperature swing adsorption tower B.
3. The system for regenerating an adsorbent used in a CO temperature swing adsorption system under negative pressure of claim 1, wherein said vent pipe and said circulating nitrogen pipe are provided with valves, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122768454.1U CN216499407U (en) | 2021-11-12 | 2021-11-12 | Adsorbent regeneration system for CO temperature swing adsorption system under negative pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122768454.1U CN216499407U (en) | 2021-11-12 | 2021-11-12 | Adsorbent regeneration system for CO temperature swing adsorption system under negative pressure |
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| Publication Number | Publication Date |
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| CN216499407U true CN216499407U (en) | 2022-05-13 |
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| CN202122768454.1U Active CN216499407U (en) | 2021-11-12 | 2021-11-12 | Adsorbent regeneration system for CO temperature swing adsorption system under negative pressure |
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| CN (1) | CN216499407U (en) |
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2021
- 2021-11-12 CN CN202122768454.1U patent/CN216499407U/en active Active
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