A low partial pressure carbon dioxide capture and absorption tower

Abstract

The invention discloses a low partial pressure carbon dioxide capture and absorption tower, which relates to the technical field of carbon dioxide emission reduction equipment. Structure; the primary scrubbing structure includes a flue gas inlet, a primary water inlet and a primary drain, the absorption structure includes a first amine escape control bed, a lean liquid inlet and a rich liquid outlet, and the secondary scrubbing structure includes a second amine escape Control bed, secondary water inlet and secondary drain, and the tertiary washing structure includes a third amine escape control bed, a tertiary water inlet, a tertiary drain and an exhaust gas outlet; the primary drain is connected to the primary water inlet, The tertiary water inlet is communicated, the secondary water outlet is communicated with the secondary water inlet, and the tertiary water outlet is communicated with the tertiary water inlet. The invention integrates flue gas purification, carbon dioxide absorption, and amine escape control, and reduces floor space.

Description

technical field [0001] The invention relates to the technical field of carbon dioxide emission reduction equipment, in particular to a low partial pressure carbon dioxide capture and absorption tower. Background technique [0002] There is a large amount of low partial pressure carbon dioxide in the exhaust gas emitted by coal-fired power plants, cement kilns, steel plants, refineries and other enterprises, which is the key area of ​​national carbon dioxide emission reduction. Considering factors such as carbon dioxide capture cost and technology maturity, currently The low partial pressure carbon dioxide capture system mostly adopts chemical absorption method. Before using amine absorbent to capture carbon dioxide in the absorption tower, it is necessary to wash the raw gas in the water washing tower to control the temperature, as well as the solid particles, SO 2 At the same time, it is necessary to control the amine escape and water balance of the capture system. The enti...

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Problems solved by technology

[0002] Coal-fired power plants, cement kilns, steel plants, refineries and other enterprises have a large amount of low partial pressure carbon dioxide in the tail gas, which is the key area of ​​national carbon dioxide emission reduction. Considering factors such as carbon dioxide capture cost and technology maturity, currently The low partial pressure carbon dioxide capture system mostly adopts the chemical absorption method. Before the amine absorbent is used in the absorption tower to capture carbon dioxide, the raw material gas needs to be washed in the water washing tower, the temperature is controlled, and the solid particles, SO 2 , NOx and other harmful components. At the same time, it is necessary to control the amine escape and water balance of the capture system. The entire absorption reaction system needs to be equipped with raw material deep purification towers, absorption towers, scrubbers and other links. The system process is long, occupies a large area, and is expensive. , which is not conducive to the construction of large-scale carbon dioxide capture system

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