CN-122006407-A - Adsorption tower and dry carbon dioxide trapping device with same

CN122006407ACN 122006407 ACN122006407 ACN 122006407ACN-122006407-A

Abstract

The invention relates to the technical field of flue gas separation, and discloses an adsorption tower and a dry carbon dioxide trapping device with the same, wherein the adsorption tower comprises an adsorption body, an air distribution plate, a conveying air pipe and a feeding pipe, and the air distribution plate divides an accommodating space into a decarburization area and an air inlet area; the air inlet area is provided with a first inlet, one end of the conveying air pipe penetrates through the first inlet, the other end of the conveying air pipe penetrates through the air distribution plate and stretches into the decarburization area, the feeding pipe is arranged in the decarburization area and connected with the inner wall of the decarburization area, the lower end of the feeding pipe is sleeved at the upper end of the conveying air pipe and is spaced from the upper end face of the air distribution plate, the minimum distance between the lower end of the feeding pipe and the upper end face of the air distribution plate is H1, the minimum distance between the upper end of the hood and the upper end face of the air distribution plate is H2, and H1 is more than or equal to 1.5 times H1 is more than or equal to 4 times H2. According to the adsorption tower, the carbon dioxide-trapped adsorbent can smoothly flow to the feeding pipe, so that the carbon dioxide-trapped adsorbent can be conveniently guided out of the adsorption tower.

Inventors

ZHANG QIAN
XU YUN
ZHUANG KE
ZHANG XIAOYU
SU TIANYUE
MENG XIAOHUAN
WANG ZIQUN
ZHANG CHUNLEI
ZHOU KAI

Assignees

国家能源集团科学技术研究院有限公司

Dates

Publication Date: 20260512
Application Date: 20260413

Claims (10)

1. An adsorption tower, comprising: the adsorption body is internally provided with an accommodating space; the air distribution plate is arranged in the accommodating space and is used for dividing the accommodating space into a decarburization area and an air inlet area along the direction from top to bottom, the air inlet area is used for accommodating smoke, the decarburization area is used for accommodating an adsorbent, a hood is arranged on one side, close to the decarburization area, of the air distribution plate, and is communicated with the air inlet area and the decarburization area and used for guiding the smoke in the air inlet area to the adsorbent in the decarburization area; The air inlet area is provided with a first inlet, one end of the air conveying pipe penetrates through the first inlet, and the other end of the air conveying pipe penetrates through the air distribution plate and stretches into the decarburization area; The feeding pipe is arranged in the decarburization zone and is connected with the inner wall of the decarburization zone, the decarburization zone is provided with a first outlet, the first outlet is arranged at the upper end of the decarburization zone, the lower end of the feeding pipe is sleeved at the upper end of the conveying air pipe and is spaced from the upper end face of the air distribution plate, the upper end of the feeding pipe extends into the first outlet and is spaced from one end, close to the outer wall of the adsorption body, of the first outlet, and the feeding pipe is spaced from the air cap along the radial direction of the adsorption body; The minimum distance between the lower end of the feeding pipe and the upper end face of the air distribution plate is H1, the minimum distance between the upper end of the hood and the upper end face of the air distribution plate is H2, and the requirements that H2 is 1.5 times H1 is less than or equal to 4 times H2 are met.
2. The adsorption tower according to claim 1, wherein the inner diameter of the air supply pipe is D1, the inner diameter of the feeding pipe is D2, and the ratio of D1/D2 is 0.3-0.8.
3. The adsorption tower according to claim 2, wherein the length of the conveying air pipe extending into the feeding pipe is L1, and the L1/D1 is more than or equal to 0.5 and less than or equal to 3.
4. The adsorption column of claim 1, further comprising: and the differential pressure gauge is communicated with the air inlet area and the decarburization area.
5. A dry carbon dioxide capture device, comprising: The adsorption column according to any one of claims 1 to 4; The upper end of the regeneration tower is provided with a feed inlet which is communicated with the first outlet so that the adsorbent can flow into the regeneration tower, and the lower end of the regeneration tower is connected with the lower end of the decarburization zone.
6. The dry carbon dioxide capture device of claim 5, wherein the regeneration tower comprises: The feeding section is provided with a receiving cone which is arranged opposite to the feeding hole; the heating section is arranged at the lower side of the feeding section and is used for heating the adsorbent; and the cooling section is arranged at the lower side of the heating section and used for cooling the adsorbent, and the lower end of the cooling section is connected with the lower end of the decarburization zone.
7. The dry carbon dioxide capture device of claim 6, wherein the heating section has a shell-and-tube heat exchanger comprising: The tube side is internally circulated with a heating medium; a shell side within which the adsorbent flows; The tube side comprises a plurality of heat exchange tubes, and the heat exchange tubes are arranged in staggered mode.
8. The dry carbon dioxide capture device of claim 5, further comprising: The flue gas system comprises a booster fan and a temperature and humidity regulator, and is used for conveying flue gas to the air inlet area.
9. The dry carbon dioxide capture device of claim 8, wherein the flue gas system further comprises a flue gas dust collector disposed between the first outlet and the feed inlet, the flue gas dust collector having an inlet in communication with the first outlet, a flue gas outlet in communication with the feed inlet, and a solids outlet in communication with the feed inlet, the dry carbon dioxide capture device further comprising: The conveying fan is connected with the flue gas outlet of the flue gas dust remover and the conveying air pipe and is used for pressurizing the flue gas filtered by the flue gas dust remover and then conveying the flue gas into the conveying air pipe.
10. The dry carbon dioxide capturing device according to claim 5, wherein the upper end of the regeneration tower has a desorption gas outlet and a dedusting material inlet, the dry carbon dioxide capturing device further comprising: The dust remover is communicated with the analysis gas outlet and the dust removing material inlet.

Description

Adsorption tower and dry carbon dioxide trapping device with same Technical Field The invention relates to the technical field of flue gas separation, in particular to an adsorption tower and a dry carbon dioxide trapping device with the same. Background The development of efficient, low cost carbon dioxide capture, utilization and sequestration (CCUS) technologies, particularly the direct capture of CO 2 from industrial emissions sources (e.g., coal-fired power plants, steel plants, cement plants, etc.), has become one of the key routes to achieve reduced carbon emissions. Currently, the mainstream technology for capturing CO 2 in emission sources such as industrial flue gas and tail gas is still mainly wet chemical absorption (such as amine liquid absorption). Although the technology is relatively mature, the problems of high system energy consumption (especially heat consumption in the desorption regeneration process), loss and secondary pollution caused by solvent easy to volatilize and degrade, serious equipment corrosion, complex process flow, large occupied area and the like exist. The economic feasibility and the application and popularization speed of the method under the large-scale emission reduction scene are severely restricted. In recent years, new dry trapping technologies represented by solid adsorbents (e.g., metal organic framework materials, modified zeolites, high performance activated carbon, etc.) have received attention because of their potential advantages of low energy consumption, high selectivity, and low equipment corrosiveness. However, the existing trapping device based on the solid adsorbent mostly refers to the traditional gas-solid contact mode such as a fixed bed or a fluidized bed, and still faces a series of challenges in actual operation, namely that the adsorbent is easy to be attenuated due to mechanical abrasion such as collision in repeated adsorption-regeneration cycles, and the adsorption efficiency is poor. Disclosure of Invention The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides the adsorption tower, and the adsorbent with carbon dioxide trapped in the adsorption tower can smoothly flow to the feeding pipe under the guidance of air flow, so that the adsorbent with carbon dioxide trapped is conveniently led out of the adsorption tower. The invention also provides a dry carbon dioxide capturing device, which comprises the adsorption tower. The adsorption tower comprises an adsorption body, an air distribution plate, a feeding pipe, a first outlet and a second outlet, wherein the adsorption body is internally provided with an accommodating space, the air distribution plate is arranged in the accommodating space and used for dividing the accommodating space into a decarburization area and an air inlet area along the direction from top to bottom, the air inlet area is used for accommodating flue gas, the decarburization area is used for accommodating adsorbent, one side, close to the decarburization area, of the air distribution plate is provided with an air cap, the air cap is communicated with the air inlet area and the decarburization area and used for guiding flue gas in the air inlet area to adsorbent in the decarburization area, the air inlet area is provided with a first inlet, one end of the air distribution pipe is arranged in the first inlet in a penetrating mode, the other end of the air distribution pipe is arranged on the decarburization area in a penetrating mode, the air inlet area is connected with the inner wall of the decarburization area, the first outlet is arranged at the upper end of the air inlet area, the lower end of the feeding pipe is sleeved with the upper end face of the air distribution plate, the distance between the first outlet and the upper end face of the air cap and the air inlet pipe is equal to or less than or equal to 1, and the distance between the first end face and the air inlet and the first end of the air distribution plate is equal to or less than or equal to 1, and the distance between the first end face and the end of the air distribution plate is equal to or less than 1, and the distance between the end and the end is equal to 1 and the end of the end face and the end is equal to the H2. According to the adsorption tower provided by the embodiment of the invention, the minimum distance between the lower end of the feeding pipe and the upper end face of the air distribution plate is defined as H1, the minimum distance between the upper end of the hood and the upper end face of the air distribution plate is defined as H2, and the requirements that H1 is less than or equal to 1.5 and H1 is less than or equal to 4 are met, so that flue gas flowing out of the upper end of the hood can be fully mixed with the adsorbent, and the conveying wind can form larger suction force in a gap between the lower end of the feeding pipe and the air distribu