absorption tower

Abstract

The invention discloses an absorption tower. The absorption tower comprises a casing, an atomizing device and a separation device. The casing has an air inlet and an air outlet; The mouth and the air outlet are connected, and the atomization device is used to atomize the absorbent; the separation device is arranged inside the absorption chamber, one end of the separation device is connected with the air inlet, and the other end of the separation device passes through the atomization device and communicates with the air outlet, and the separation device Used to separate carbon dioxide into the absorption chamber. In the absorption tower of the present invention, through the arrangement of the atomization device and the separation device, the carbon dioxide in the raw material gas enters the absorption chamber after being separated by the separation device, and the carbon dioxide entering the absorption chamber is immediately absorbed by the absorbent sprayed by the atomization device, increasing the At the same time, the atomization device atomizes the absorbent, which increases the contact area between the absorbent and carbon dioxide, and improves the rate at which the absorbent absorbs carbon dioxide.

Description

technical field [0001] The invention relates to the technical field of carbon dioxide capture, in particular to an absorption tower. Background technique [0002] The conventional pre-combustion carbon capture process uses a shift process to convert carbon monoxide in the synthesis gas into carbon dioxide and hydrogen (shift gas), and the shift gas then enters the carbon dioxide absorption tower for carbon capture. [0003] In the related technology, the commonly used absorption towers are mostly packed towers or plate towers. The shift gas enters the upward direction from the middle and lower part of the tower and contacts with the semi-lean liquid (amine liquid) in the middle of the tower in countercurrent to complete the partial absorption of carbon dioxide, and the residual carbon dioxide in the shift gas Secondary absorption is carried out with the regenerated lean liquid (amine liquid) in the upper part of the tower. However, the shift gas of this kind of absorption t...

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Problems solved by technology

However, the shift gas of this kind of absorption tower passes through the flow surface of the tower body at full flow. In order to ensure a good absorption effect, a larger-sized absorption tower is required, and the impurity gas in the shift gas affects the total proportion of carbon dioxide, so the required The circulation volume of semi-lean liquid and lean liquid absorbents is relatively large, which results in relatively high power consumption of pumps and large subsequent system capacity, resulting in energy consumption and equipment investment for the overall pre-combustion carbon capture process bigger

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