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CN-122006400-A - Air trapping device

CN122006400ACN 122006400 ACN122006400 ACN 122006400ACN-122006400-A

Abstract

The application relates to an air trapping device, which comprises a shell and a bearing mechanism. The housing is provided with a receiving chamber and a gas inlet and a gas outlet in communication with the receiving chamber. The bearing mechanism is arranged in the accommodating cavity and is provided with a plurality of subchambers, the subchambers are respectively communicated to the gas inlet and the subchambers are respectively communicated to the gas outlet, and the subchambers are used for bearing the adsorbent. According to the technical scheme provided by the application, the plurality of subchambers can adsorb or desorb carbon dioxide at the same time, the thickness of the adsorbent of each subchamber is greatly reduced, heat does not need to penetrate through a thicker integral bearing mechanism, only needs to be transmitted in a single subchamber, the heat transfer path is obviously shortened, the temperature gradient in the bearing mechanism is effectively reduced, the bearing mechanism can quickly reach temperature balance, the heating and cooling rates of the adsorbent can be further accelerated, the cycle period of carbon dioxide adsorption and desorption is obviously shortened, and the capturing capacity of the air capturing device for carbon dioxide is improved.

Inventors

  • HAN TAO
  • Weng Xiaohan
  • XU DONG
  • YU XUEHAI
  • YANG GUANGJUN
  • FENG LEI
  • CHANG LIN
  • FENG WEI

Assignees

  • 国家能源集团新能源技术研究院有限公司

Dates

Publication Date
20260512
Application Date
20260224

Claims (10)

  1. 1. An air capture device, the air capture device comprising: a housing (10) provided with a housing chamber (11), a gas inlet (12) and a gas outlet (14) communicating with the housing chamber (11); The bearing mechanism (20) is arranged in the accommodating cavity (11), the bearing mechanism (20) is provided with a plurality of subchambers (21), the subchambers (21) are respectively communicated with the gas inlet (12), the subchambers (21) are respectively communicated with the gas outlet (14), and the subchambers (21) are used for bearing the adsorbent.
  2. 2. The air trapping device according to claim 1, wherein a gas channel (22) is provided between two adjacent subchambers (21), the gas channel (22) being in communication with the corresponding two subchambers (21), the gas channel (22) being in communication with the gas inlet (12).
  3. 3. The air trapping device according to claim 2, wherein the sub-chambers (21) and the gas passages (22) are alternately arranged along a first direction, and a vent is provided at a side of the sub-chamber (21) close to the gas passages (22) to communicate the sub-chamber (21) and the gas passages (22), the first direction being perpendicular to an air intake direction of the gas inlet (12).
  4. 4. An air capture device according to claim 3, characterized in that the side walls of the subchamber (21) extending in the inlet direction of the gas inlet (12) are configured as a porous structure (23) and/or, The side walls of the subchambers (21) extending along the first direction are configured as porous structures (23); wherein the porous structure (23) has a plurality of the vents.
  5. 5. An air capture device according to claim 3, wherein the gas outlet (14) is offset from the vent.
  6. 6. The air capture device of claim 1, wherein the gas inlet (12) and the gas outlet (14) are located at both ends of the carrier means (20) in the gas inlet direction (12), respectively.
  7. 7. The air-trapping device according to claim 1, the air trapping device is characterized by further comprising: The electrode interface (30) is arranged on the bearing mechanism (20), and the electrode interface (30) is used for being electrically connected with a power supply and the adsorbent.
  8. 8. The air trapping device according to claim 7, wherein a plurality of the subchambers (21) are sequentially communicated, and the electrode interface (30) is provided to the subchamber (21) on the outside.
  9. 9. The air capture device of claim 1, wherein a regeneration medium inlet (13) is provided on the housing (10), the regeneration medium inlet (13) being in communication with the receiving chamber (11), and the regeneration medium inlet (13) being on the same side of the housing (10) as the gas inlet (12).
  10. 10. The air-trapping device according to claim 1, the air trapping device is characterized by further comprising: the induced draft fan (40) is arranged outside the shell (10) and is used for blowing air to the air inlet (12); The blocking door is arranged on the shell (10) and can block or open the gas inlet (12); and the vacuum part is communicated with the gas outlet (14) and is used for exhausting the accommodating cavity (11).

Description

Air trapping device Technical Field The application relates to the technical field of gas adsorption separation, in particular to an air trapping device. Background The direct air trapping technology is a negative emission technology for directly extracting carbon dioxide from the atmosphere through a chemical or physical process, mainly utilizes an adsorbent to selectively capture the carbon dioxide and recycle the carbon dioxide, and finally realizes the permanent sequestration or the recycling of the carbon dioxide. In the related art, an air trapping device generally adopts a particle packing fixed bed reactor, a particle solid adsorbent is packed in a fixed bed, and air passes through a bed layer under the action of an induced draft fan to finish the adsorption of carbon dioxide. The regeneration mode mainly comprises the mode of introducing a regeneration medium, wherein the regeneration medium is usually hot steam, hot inert gas and the like to realize desorption of carbon dioxide. Wherein, the adsorption process of the carbon dioxide is exothermic reaction, and the desorption of the carbon dioxide is endothermic reaction. However, the heat transfer performance of the bed layer in the related art is poor, so that the temperature gradient in the bed layer is increased, and the temperature rising and reducing rate of the adsorbent is slowed down, so that the cycle period of carbon dioxide adsorption and desorption is prolonged, and the carbon dioxide productivity is restricted. Disclosure of Invention Based on this, it is necessary to provide an air trapping device against the problem of a large temperature gradient inside the bed. An air capture device, the air capture device comprising: The shell is provided with a containing cavity and a gas inlet and a gas outlet which are communicated with the containing cavity; The bearing mechanism is arranged in the accommodating cavity and is provided with a plurality of subchambers, the subchambers are respectively communicated with the gas inlet and the gas outlet, and the subchambers are used for bearing the adsorbent. In one embodiment, a gas channel is arranged between two adjacent subchambers, the gas channel is communicated with the corresponding two subchambers, and the gas channel is communicated with the gas inlet. In one embodiment, the subchambers and the gas channels are alternately arranged along a first direction, and a vent is arranged on one side of the subchambers, which is close to the gas channels, so as to communicate the subchambers and the gas channels, and the first direction is perpendicular to the air inlet direction of the gas inlet. In one of the embodiments, the side walls of the subchamber extending in the gas inlet direction are configured as a porous structure, and/or, The side walls of the subchambers extending along the first direction are configured as porous structures; Wherein the porous structure has a plurality of vents. In one embodiment, the gas outlet is offset from the vent. In one embodiment, the gas inlet and the gas outlet are respectively positioned at two ends of the bearing mechanism along the gas inlet direction of the gas inlet. In one embodiment, the air capture device further comprises: The electrode interface is arranged on the bearing mechanism and is used for being electrically connected with a power supply and the adsorbent. In one embodiment, the plurality of subchambers are sequentially communicated, and the electrode interface is arranged in the outer subchamber. In one embodiment, a regeneration medium inlet is provided on the housing, the regeneration medium inlet being in communication with the receiving chamber, and the regeneration medium inlet being on the same side of the housing as the gas inlet. In one embodiment, the air capture device further comprises: The induced draft fan is arranged outside the shell and is used for blowing air to the air inlet; the blocking door is arranged on the shell and can block or open the gas inlet; and the vacuum part is communicated with the gas outlet and is used for exhausting the accommodating cavity. Above-mentioned air trapping apparatus, bearing mechanism set up in holding the intracavity, and bearing mechanism includes a plurality of subchambers, and the adsorbent is filled in different subchambers, and a plurality of subchambers all communicate with gas inlet and gas outlet respectively. In the carbon dioxide adsorption process, air enters different subchambers through the gas inlet, the adsorbent adsorbs carbon dioxide, and other gases are discharged from the subchambers and then discharged to the outside through the gas outlet. In the carbon dioxide desorption process, the gas inlet is closed, carbon dioxide is desorbed from the adsorbent, high-concentration carbon dioxide is discharged from the subchamber, and then the high-concentration carbon dioxide is recovered and stored through the gas outlet. By adopting the structure, the contact area of the