CN214598096U - Purification tower for vacuum temperature swing adsorption - Google Patents
Purification tower for vacuum temperature swing adsorption Download PDFInfo
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- CN214598096U CN214598096U CN202121195406.1U CN202121195406U CN214598096U CN 214598096 U CN214598096 U CN 214598096U CN 202121195406 U CN202121195406 U CN 202121195406U CN 214598096 U CN214598096 U CN 214598096U
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Abstract
The utility model discloses a purification tower for vacuum temperature swing adsorption, which comprises a cylinder body, wherein an adsorption layer, a cold source layer and a heat insulation layer are sequentially arranged inside the cylinder body from inside to outside, one end of the adsorption layer is connected with an air inlet pipe, the other end of the adsorption layer is connected with an air outlet pipe, and the cold source layer is connected with refrigeration equipment; the purification tower is connected with a regenerative vacuum pump. The utility model discloses a purification tower for vacuum temperature swing adsorption can be used for the purification of gases such as helium, hydrogen, neon, and purification efficiency is high, purification back gas purity is high, the energy consumption is low, practices thrift use cost.
Description
Technical Field
The utility model relates to a purification tower for vacuum temperature swing adsorption belongs to gaseous purification technical field.
Background
The temperature swing adsorption device generally adopts a common double-tower design, when one tower is ensured to be in an adsorption state, the other tower is in a desorption state, porous adsorption materials such as active carbon and molecular sieves are filled in the tower, other impurities except helium are adsorbed on the porous adsorption materials through temperature reduction, the impurities can be desorbed from the adsorbent again through temperature rise to complete the regeneration of the adsorbent, the helium is purified, and other gas impurities are discharged along with the regeneration process.
A plurality of adsorption cylinders soaked by cold sources are arranged in each adsorption tower of a traditional Temperature Swing Adsorption (TSA) device, a plurality of adsorbent fillers such as molecular sieves and activated carbon are arranged in the adsorption cylinders, the adsorption towers generally adopt the cold sources (cold liquid) such as liquid nitrogen or a refrigerating unit, the temperature of the cold sources is less than or equal to minus 20 ℃, when the cold sources provided by the liquid nitrogen (-196 ℃) are adopted, the utilization rate of cold energy is not high, and the cold nitrogen is directly emptied after use, so that the cost is higher.
Disclosure of Invention
To the problem that above-mentioned prior art exists, the utility model provides a purification tower for vacuum temperature swing adsorption, make full use of cold volume, and the refrigerant can recycle, practices thrift use cost.
In order to achieve the purpose, the purification tower for vacuum temperature swing adsorption comprises a barrel, wherein an adsorption layer, a cold source layer and a heat insulation layer are sequentially arranged inside the barrel from inside to outside, one end of the adsorption layer is connected with an air inlet pipe, the other end of the adsorption layer is connected with an air outlet pipe, and the cold source layer is connected with refrigeration equipment; the purification tower is connected with a regenerative vacuum pump.
As an improvement, the regeneration of the purification tower is completed by a regenerative vacuum pump, and the regeneration pressure is less than or equal to 10 kPa.
As an improvement, the adsorption layer adopts composite filler.
As a further improvement, the composite filler is at least two of activated alumina, zeolite molecular sieve and activated carbon.
As an improvement, the cold source layer is filled with liquefied liquid ammonia or refrigerant R22, and the heat insulating layer is filled with vacuum or pearlife.
As a further improvement, the thickness of the cold source layer is not less than 3mm, and the thickness of the heat insulating layer is not less than 5 mm.
As an improvement, a control valve is arranged on the purifying tower and adopts an electromagnetic valve or a pneumatic valve.
Compared with the prior art, the utility model discloses a purification tower for vacuum temperature swing adsorption can be used for the purification of gases such as helium, hydrogen, neon, and purification efficiency is high, purification back gas purity is high, the energy consumption is low, practices thrift use cost.
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic view of an application of the present invention;
in the figure: 1. the device comprises an adsorption layer, 2, a cold source layer, 3, a heat insulation layer, 4, a regenerative vacuum pump, 5, an air outlet pipe, 6, refrigeration equipment, 7, an air inlet pipe, 8, a recovery fan, 9, a membrane separator, 10, a compressor, 11 and a heat exchanger.
Detailed Description
The following examples are further illustrative of the present invention as to the technical content of the present invention, but the essential content of the present invention is not limited to the following examples, and those skilled in the art can and should understand that any simple changes or substitutions based on the essential spirit of the present invention should belong to the protection scope of the present invention.
As shown in fig. 1, a purification tower for vacuum temperature swing adsorption comprises a cylinder, wherein an adsorption layer 1, a cold source layer 2 and a heat insulation layer 3 are arranged in the cylinder, and the adsorption layer 1, the cold source layer 2 and the heat insulation layer 3 are sequentially arranged from inside to outside, the adsorption layer 1 mainly fills an adsorbent, the cold source layer 2 mainly serves as a circulation channel of the cold source, the circulating cold source cools the adsorbent, gas and the like and takes away adsorption heat, and the heat insulation layer 3 mainly serves to isolate heat exchange with the environment;
one end of the adsorption layer 1 is connected with the air inlet pipe 7, the other end of the adsorption layer is connected with the air outlet pipe 5, crude gas entering through the air inlet pipe 7 is adsorbed and purified through the adsorption layer 1, and purified pure gas is discharged through the air outlet pipe 5;
the cold source layer 2 is connected with a refrigerating device 6, the cold source is provided by the refrigerating device 6, the refrigerating device 6 adopts one or more of liquid ammonia, refrigerant R22 and other refrigerating media, and can provide a low-temperature environment of-40 to-30 ℃;
the purification tower is connected with a regenerative vacuum pump 4, the regeneration of the adsorbent in the purification tower is completed by the regenerative vacuum pump 4, and the regeneration pressure is less than or equal to 10 kPa.
As an improvement of the embodiment, the adsorption layer 1 adopts composite filler which is at least two of activated alumina, zeolite molecular sieve and activated carbon, the raw materials are easy to obtain, the cost is low, and the adsorption effect can effectively meet the use requirement.
As an improvement of the embodiment, the cold source layer 2 is filled with liquefied liquid ammonia or refrigerant R22, and conventional refrigeration media (from-40 ℃ to-30 ℃) such as liquid ammonia and R22 are adopted, so that the cold source layer is very suitable for small-flow application scenes; the heat insulating layer 3 is filled with vacuum or pearlife, and the heat insulating layer 3 is used for isolating ambient air for heat exchange, so that the cold loss of the cold source layer 2 is reduced, and the power consumption is reduced.
As an improvement of the embodiment, the thickness of the cold source layer 2 is not less than 3mm, and the thickness of the heat insulating layer 3 is not less than 5mm, so as to reduce the flow resistance of the cold source and improve the heat insulating effect.
As an improvement of the embodiment, the purification tower is provided with a control valve, the control valve adopts a solenoid valve or a pneumatic valve with high sealing performance, and the control precision is high.
Example 1
Will the utility model discloses a purification tower is used for the recovery purification of helium, adopts the device as shown in figure 2, includes following steps:
the raw material helium enters a membrane separator 9 under the action of a recovery fan 8 to carry out primary separation on low-concentration (10-50%) raw material helium to obtain crude helium with the purity of more than 90%; the obtained crude helium enters a compressor 10, the compressor 10 pressurizes the crude helium and then enters a heat exchanger 11 (a plate heat exchanger is adopted), the crude helium continuously enters two vacuum temperature swing adsorption devices formed by the purification towers of the utility model, the purification towers adsorb and purify the crude helium and obtain 99.99-99.999% of pure helium, and the pure helium flows exchange heat with the crude helium when passing through the heat exchanger 11 so as to fully recover cold carried by the pure helium flowing out of the vacuum temperature swing adsorption devices and fully cool the crude helium, so that the cold is fully utilized, and the power consumption is reduced; the purification tower in the vacuum temperature swing adsorption device is regenerated by a regeneration vacuum pump 4, and part of the regeneration gas flows back to a recovery fan 8 for recovery and purification again.
The utility model discloses a purification tower has purification efficiency height, purification back gas purity height, energy consumption low grade characteristics, is different from the cold source that traditional Temperature Swing Adsorption (TSA) device was provided by liquid nitrogen (-196 ℃), the utility model discloses can adopt conventional refrigerant medium (-40-, -30 ℃) such as liquid ammonia, R22, be applicable to very much the low discharge and use the scene. The cold source that is different from liquid nitrogen (-196 ℃) and provides simultaneously, the condition of the direct evacuation of cold nitrogen gas after using, the utility model discloses a refrigeration medium that the purification tower used not only cold volume by make full use of, refrigeration medium recycles moreover, has practiced thrift use cost.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modification, equivalent replacement or improvement made within the spirit and principle of the present invention should be included in the present invention.
Claims (7)
1. A purification tower for vacuum temperature swing adsorption comprises a cylinder body, and is characterized in that an adsorption layer (1), a cold source layer (2) and a heat insulation layer (3) are sequentially arranged inside the cylinder body from inside to outside, one end of the adsorption layer (1) is connected with an air inlet pipe (7), the other end of the adsorption layer is connected with an air outlet pipe (5), and the cold source layer (2) is connected with refrigeration equipment (6); the purification tower is connected with a regenerative vacuum pump (4).
2. The purification column for vacuum temperature swing adsorption according to claim 1, wherein the regeneration of the purification column is performed by a regenerative vacuum pump (4) at a regeneration pressure of 10kPa or less.
3. The purification column for vacuum temperature swing adsorption according to claim 1, wherein the adsorption layer (1) is made of composite packing.
4. The purification column for vacuum temperature swing adsorption according to claim 3, wherein the composite filler is at least two of activated alumina, zeolite molecular sieve and activated carbon.
5. The purification column for vacuum temperature swing adsorption according to claim 1 or 3, wherein the cold source layer (2) is filled with liquefied liquid ammonia or refrigerant R22, and the heat insulating layer (3) is filled with vacuum or pearlife.
6. The purification column for vacuum temperature swing adsorption according to claim 5, wherein the thickness of the cold source layer (2) is not less than 3mm and the thickness of the thermal insulation layer (3) is not less than 5 mm.
7. The purification column according to claim 1, wherein the purification column is provided with a control valve, and the control valve is an electromagnetic valve or a pneumatic valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121195406.1U CN214598096U (en) | 2021-05-31 | 2021-05-31 | Purification tower for vacuum temperature swing adsorption |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121195406.1U CN214598096U (en) | 2021-05-31 | 2021-05-31 | Purification tower for vacuum temperature swing adsorption |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114483546A (en) * | 2022-01-24 | 2022-05-13 | 山东钢铁集团永锋临港有限公司 | Method for improving quality of compressed air of air compression station |
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2021
- 2021-05-31 CN CN202121195406.1U patent/CN214598096U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114483546A (en) * | 2022-01-24 | 2022-05-13 | 山东钢铁集团永锋临港有限公司 | Method for improving quality of compressed air of air compression station |
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