CN220918637U - Gas low-temperature adsorption purification device and gas production system - Google Patents
Gas low-temperature adsorption purification device and gas production system Download PDFInfo
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- CN220918637U CN220918637U CN202322581850.2U CN202322581850U CN220918637U CN 220918637 U CN220918637 U CN 220918637U CN 202322581850 U CN202322581850 U CN 202322581850U CN 220918637 U CN220918637 U CN 220918637U
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- pipe
- liquid nitrogen
- adsorption
- gas
- nitrogen
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- 238000001179 sorption measurement Methods 0.000 title claims abstract description 43
- 238000000746 purification Methods 0.000 title claims abstract description 25
- 238000004519 manufacturing process Methods 0.000 title claims description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 123
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 61
- 239000007788 liquid Substances 0.000 claims abstract description 38
- 239000007789 gas Substances 0.000 claims abstract description 29
- 238000007599 discharging Methods 0.000 claims abstract description 13
- 238000009413 insulation Methods 0.000 claims description 7
- 239000012535 impurity Substances 0.000 claims description 6
- 238000005265 energy consumption Methods 0.000 abstract description 6
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 238000009776 industrial production Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 20
- 239000001257 hydrogen Substances 0.000 description 12
- 229910052739 hydrogen Inorganic materials 0.000 description 12
- 239000003463 adsorbent Substances 0.000 description 11
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 10
- 229910052786 argon Inorganic materials 0.000 description 10
- 239000002994 raw material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000008929 regeneration Effects 0.000 description 3
- 238000011069 regeneration method Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
- 230000002277 temperature effect Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Landscapes
- Separation Of Gases By Adsorption (AREA)
Abstract
The utility model discloses a gas low-temperature adsorption purification device, which comprises a tank body; wherein, a heat regenerator and a liquid nitrogen area are arranged in the tank body from top to bottom; the heat regenerator is provided with an air inlet pipe, an air outlet pipe and a nitrogen discharge pipe which are communicated up and down; the lower ends of the air inlet pipe and the air outlet pipe are communicated through an adsorption pipe, and the adsorption pipe is positioned in the liquid nitrogen area; the lower end of the nitrogen discharging pipe extends to the position above the liquid nitrogen area; the liquid nitrogen area is communicated with a liquid nitrogen feeding pipe; the device fully utilizes the low-temperature effect of the escaping nitrogen and the gas during output to exchange heat with the input gas, realizes the full utilization of a cold source, reduces the energy consumption and is beneficial to industrial production.
Description
Technical Field
The utility model relates to the technical field of gas purification devices, in particular to a gas low-temperature adsorption purification device and a gas production system.
Background
Industrial gases contain few impurities due to limited preparation process, and further purification is needed to meet the purity requirement when the downstream industries are used for synthesis or direct use.
Cryogenic adsorption is a common way of gas purification, with better adsorption at low temperatures being selected due to the better adsorption of some impurities (e.g. N 2, ar, CO, etc.). The existing low-temperature adsorption device has the defect of high energy consumption, and when the gas is used as an important raw material for industrial application, and is produced and used in a large quantity, the high energy consumption can cause high cost, so that the method is not beneficial to industrial production and application.
Disclosure of utility model
The utility model aims to provide a gas low-temperature adsorption purification device, which solves the defect that the low-temperature adsorption energy consumption is high in the prior art of gas purification.
In order to achieve the above object, the present utility model is as follows:
In one aspect, a gas low-temperature adsorption purification device is provided, comprising a tank body; wherein, a heat regenerator and a liquid nitrogen area are arranged in the tank body from top to bottom; the heat regenerator is provided with an air inlet pipe, an air outlet pipe and a nitrogen discharge pipe which are communicated up and down; the lower ends of the air inlet pipe and the air outlet pipe are communicated through an adsorption pipe, and the adsorption pipe is positioned in the liquid nitrogen area; the lower end of the nitrogen discharging pipe extends to the position above the liquid nitrogen area; and the liquid nitrogen area is communicated with a liquid nitrogen feeding pipe.
Optionally, one side of the air outlet pipe is communicated with a vacuum connecting pipe.
Optionally, an insulation board is arranged in the tank body and is positioned above the liquid nitrogen area; the lower end of the nitrogen discharging pipe extends to the lower side of the heat insulation plate.
Optionally, a thermometer and a flowmeter are arranged on the nitrogen discharging pipe; the liquid nitrogen feeding pipe is provided with a control valve; the thermometer and the flowmeter are respectively interlocked with the control valve.
In another aspect, a gas production system is provided that includes the purification device described above, the purification devices being connected in parallel.
Compared with the prior art, the utility model has the beneficial effects that:
The utility model utilizes the heat regenerator arranged above the liquid nitrogen area, fully utilizes the low temperature effect of the escaping nitrogen and the gas during output to exchange heat with the input gas, realizes the full utilization of the cold source, reduces the energy consumption and is beneficial to industrial production.
Drawings
Fig. 1 is an overall schematic diagram of a gas low-temperature adsorption purification device provided by the utility model.
Wherein: 10. an air inlet pipe; 11. an adsorption tube; 12. an air outlet pipe; 13. a vacuum connection tube; 20. a nitrogen discharge pipe; 21. a thermometer; 22. a flow meter; 30. a liquid nitrogen feed pipe; 31. a control valve; 100. a tank body; 101. a liquid nitrogen zone; 102. a thermal insulation board; 200. a heat regenerator.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It is to be understood that the terms "upper," "lower," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship based on that shown in the drawings, merely to facilitate describing the present utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.
It should also be noted that unless explicitly stated or limited otherwise, terms such as "mounted," "connected," "secured," "disposed," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between the two parts or interaction relationship between the two parts. It will be apparent to those skilled in the art that the terms described above have the particular meaning in the present utility model, as the case may be.
In one embodiment, as shown in FIG. 1, a gas cryogenic adsorption purification apparatus is provided, comprising a tank 100; wherein, a heat regenerator 200 and a liquid nitrogen area 101 are arranged in the tank body 100 from top to bottom; the heat regenerator 200 is provided with an air inlet pipe 10, an air outlet pipe 12 and a nitrogen discharging pipe 20 which are communicated up and down; the lower ends of the air inlet pipe 10 and the air outlet pipe 12 are communicated through an adsorption pipe 11, and the adsorption pipe 11 is used for adsorbing impurities in gas and is arranged in a liquid nitrogen area 101; the lower end of the nitrogen discharging pipe 20 extends to the upper part of the liquid nitrogen area 101; the liquid nitrogen zone 101 is communicated with a liquid nitrogen feed pipe 30.
In the above embodiment, the regenerator 200 disposed above the liquid nitrogen region fully utilizes the low temperature effect of the escaping nitrogen gas and the gas during output to perform heat exchange on the input gas, thereby realizing the full utilization of the cold source and reducing the energy consumption.
In a preferred embodiment, the adsorption tube 11 is a coil pipe filled with a gas impurity adsorbent, so as to improve the adsorption efficiency.
In a preferred embodiment, one side of the air outlet pipe 12 is communicated with a vacuum connecting pipe 13; the vacuum connecting pipe 13 is used for connecting vacuum, when the adsorbent in the adsorption pipe 11 reaches the limit, negative pressure is formed through the vacuum effect, so that impurity gas is separated from the adsorbent, and analysis is realized.
In a preferred embodiment, a thermal insulation board 102 is disposed in the tank body 100 and located above the liquid nitrogen area 101, for reducing the upward escape speed of the liquid nitrogen; the lower end of the nitrogen discharging pipe 20 extends below the insulation board 102, so that the nitrogen escaping from the surface of the liquid nitrogen area 101 enters the heat regenerator 200 through the nitrogen discharging pipe 20.
In a preferred embodiment, a thermometer 21 and a flowmeter 22 are arranged on the nitrogen discharging pipe 20; the liquid nitrogen feeding pipe 30 is provided with a control valve 31; the thermometer 21 and the flowmeter 22 are respectively interlocked with the control valve 31, and the mass of the escaping nitrogen can be obtained through the calculation of the density value under the temperature and the combination of the volume flow, so that the liquid nitrogen feeding amount is controlled by adjusting the size of the control valve 31, and the liquid level balance of the liquid nitrogen area 101 is maintained.
In the above embodiment, the regenerator 200 has a structure similar to a heat exchanger, and the heat exchange of the nitrogen discharging pipe 20, the air inlet pipe 10 and the air outlet pipe 12 is realized through the hollow cavity, preferably the nitrogen discharging pipe 20 runs on a shell side, and the air inlet pipe 10 and the air outlet pipe 12 independently run on different pipe sides.
In the above embodiments, taking hydrogen as an example, existing high purity hydrogen production and filling, production devices are designed as pressure swing adsorption systems. The design process is that the raw material hydrogen sent from branch company is extracted by a pressure swing adsorption system (99.9% of the raw material hydrogen is purified to 99.999%), and is filled into a tube bundle hydrogen car through a compressor to be sent to customers. The device is designed to run continuously. Because the adsorption capacity of the adsorbent to argon is weak, the argon content in the hydrogen purified by the pressure swing adsorption system is about 100ppm, and the requirements of customers with higher requirements cannot be met. Through the purification device described in the above embodiment, 3a+5a molecular sieve adsorbent is selected for adsorption, and the specific process is as follows:
1) Adsorption stage: raw material hydrogen firstly enters a heat regenerator 200 to exchange heat with the discharged nitrogen and low-temperature product hydrogen, the temperature of the hydrogen is reduced by fully utilizing the discharged nitrogen, then the hydrogen enters an adsorption tube 11 filled with an adsorbent, the adsorption tube 11 is arranged in a liquid nitrogen area 101, the adsorption capacity of the adsorbent to argon is strong at a low temperature (about-196 ℃), most of the argon in the hydrogen is adsorbed, and then the high-purity hydrogen with the argon removed is discharged as a qualified product after heat exchange and temperature rise of the heat regenerator 200;
2) Regeneration: the adsorbent has a certain capacity for adsorption of argon, and the adsorbent needs to be regenerated after the adsorbed argon reaches adsorption saturation. The regeneration process stops the liquid nitrogen feeding pipe 30 feeding first, and liquid nitrogen is reversely extracted; then, the air inlet pipe 10 is filled with normal-temperature nitrogen gas to enable the adsorption pipe 11 to gradually return to normal temperature, then vacuum pumping is carried out through the vacuum connecting pipe 13, the adsorption capacity of the adsorbent to argon is greatly reduced under the conditions of higher temperature and lower pressure, the adsorbed argon is resolved and carried out by vacuum, and the adsorption capacity of the adsorbent to the argon is restored again.
In another embodiment, a gas production system is provided comprising a plurality of purification devices as described in the above embodiments, the purification devices being connected in parallel. For example, two adsorption devices are used for switching, one is in an adsorption state and the other is in a regeneration state, so that stable and efficient purification production of gas is realized.
Claims (6)
1. A gas low-temperature adsorption purification device, which comprises a tank body (100); the device is characterized in that a heat regenerator (200) and a liquid nitrogen area (101) are arranged in the tank body (100) from top to bottom; the heat regenerator (200) is provided with an air inlet pipe (10), an air outlet pipe (12) and a nitrogen discharge pipe (20) which are communicated up and down; the lower ends of the air inlet pipe (10) and the air outlet pipe (12) are communicated through an adsorption pipe (11), and the adsorption pipe (11) is used for adsorbing impurities in gas and is arranged in the liquid nitrogen area (101); the lower end of the nitrogen discharging pipe (20) extends to the position above the liquid nitrogen area (101); the liquid nitrogen area (101) is communicated with a liquid nitrogen feeding pipe (30).
2. Purification device according to claim 1, wherein the adsorption tube (11) is a coil.
3. Purification device according to claim 1, characterized in that the outlet pipe (12) is connected on one side with a vacuum connection pipe (13).
4. The purification device according to claim 1, characterized in that an insulation board (102) is arranged in the tank body (100) and is positioned above the liquid nitrogen area (101); the lower end of the nitrogen discharging pipe (20) extends to the lower portion of the heat insulation plate (102).
5. Purification device according to claim 1, characterized in that the nitrogen discharge pipe (20) is provided with a thermometer (21) and a flowmeter (22); the liquid nitrogen feeding pipe (30) is provided with a control valve (31); the thermometer (21) and the flowmeter (22) are respectively interlocked with a control valve (31).
6. A gas production system comprising a plurality of purification devices according to any one of claims 1-5, said purification devices being connected in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322581850.2U CN220918637U (en) | 2023-09-22 | 2023-09-22 | Gas low-temperature adsorption purification device and gas production system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322581850.2U CN220918637U (en) | 2023-09-22 | 2023-09-22 | Gas low-temperature adsorption purification device and gas production system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220918637U true CN220918637U (en) | 2024-05-10 |
Family
ID=90961094
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322581850.2U Active CN220918637U (en) | 2023-09-22 | 2023-09-22 | Gas low-temperature adsorption purification device and gas production system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220918637U (en) |
-
2023
- 2023-09-22 CN CN202322581850.2U patent/CN220918637U/en active Active
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