Novel flue gas CO2 capture system regeneration process

Abstract

The invention discloses a novel flue gas CO2 capture system regeneration process which comprises the following steps of: S1, CO2 absorption: flue gas subjected to desulfurization, denitrification and dust removal enters a deep purification tower, the flue gas is pressurized by an induced draft fan and then enters an absorption tower, a barren liquor absorbent is added into the absorption tower, the barren liquor absorbent is in countercurrent contact with the flue gas, and CO2 absorption is completed; S2, generation of rich liquid: the barren liquor absorbent reacts with carbon elements in the flue gas in the absorption tower to form rich liquid, the rich liquid is discharged through the bottom of the absorption tower, and gas is discharged from a tail gas discharge port in the top of the absorption tower; S3, rich liquid heat exchange; S4, falling film type regeneration; and S5, siphoning type regeneration. A falling film type boiler is mainly adopted to replace a conventional thermosyphon type boiler, top spraying falling film type regeneration and boiler bottom liquid inlet syphon type regeneration can be achieved through technological process switching, two regeneration technologies are achieved through one set of technological equipment, the number of equipment is reduced, and the engineering investment cost is saved.

Description

technical field [0001] This application relates to the technical field of atmospheric environmental protection, in particular to a new type of flue gas CO 2 Capture system regeneration process. Background technique [0002] Carbon capture and storage technology (Carbon Capture & Storage, referred to as CCS) is to reduce the emission of CO into the atmosphere without reducing the current consumption of fossil fuels. 2 The means of gas volume, the methods of CCS technology to separate carbon dioxide from flue gas mainly include: membrane separation method, physical adsorption method, low temperature distillation method, absorption separation method, etc. CO capture by chemical absorption 2 Because of its fast absorption rate, high absorption efficiency, simple process, and relatively mature technology, it is widely used, and many demonstration evaluation projects have been built at home and abroad. [0003] However, in the prior art, the chemical absorption method captures ...

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Problems solved by technology

[0003] However, in the prior art, the chemical absorption method captures CO 2 The main disadvantage of the technology is that the energy consumption of the regeneration system is too high, and the number of equipment used increases the project investment cost.

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