Flue gas decarbonization system of stepped absorption and regeneration

Abstract

A flue gas decarbonization system of stepped absorption and regeneration belongs to the technical field of clean coal and comprises two parts of an absorption system and a regeneration system. The absorption system comprises a pregnant solution tank, an absorption tower, filling, a defogger and two barren liquor inlets; and the regeneration system comprises a regeneration tower, a barren liquor tank, two barren liquor accumulating tanks, a defogger, a solution boiler, a regeneration gas cooler, and the like. The flue gas decarbonization system adopts the new technology of two-stage absorption and stepped regeneration, can adapt to the absorption characteristic of absorbent, obviously optimizes the system, lowers the energy consumption and the electricity consumption of regeneration, and is suitable to the decarbonization of the coal-fired power plant and the chemical field.

Description

technical field [0001] The invention belongs to the technical field of flue gas purification, and in particular relates to a flue gas decarbonization system with hierarchical absorption and regeneration. Background technique [0002] The problem of climate warming is a problem that affects the development of the whole human being, CO 2 is a major contributor to climate warming, while coal-fired power stations are a major contributor to CO 2 The largest emission source, its proportion exceeds 50% in our country. Anyone who wants to control CO on a large scale 2 emission, to deal with climate warming, we must focus on the CO of coal-fired power plants 2 catch. [0003] Carbon capture in coal-fired power plants mainly includes pre-combustion capture, oxygen-enriched combustion technology and post-combustion capture. Carbon capture before combustion is mainly used in IGCC power plants, and the latter two can be applied to the transformation of traditional power plants. Amo...

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Problems solved by technology

[0006] Experimental studies have found that for traditional carbon capture technology, the absorption tower has absorbed about 90% of the CO in the lower 1 / 3 to 1 / 2 of the tower 2 , the remaining half of the tower height only removes about 5%; for the regenerative system, the existing absorbent generally has most of the CO when it pays less energy 2 Regenerated, and to continue to regenerate, you need to pay twice the cost of energy consumption before

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