Flue gas treatment method and device

Abstract

The invention provides a flue gas treatment method and device, and relates to the technical field of flue gas treatment. The flue gas treatment method comprises the following steps that to-be-treatedflue gas and a first working medium are subjected to first heat exchange, and first flue gas is obtained; the first flue gas is subjected to wet desulphurization, and second flue gas is obtained; thesecond flue gas and a second working medium are subjected to second heat exchange, and third flue gas is obtained; the third flue gas is heated and then discharged. By using the flue gas treatment method, the desulphurization efficiency of the flue gas can be improved, and while desulphurization is implemented by using a wet desulphurization technology, the aim of dehumidification and white smokeelimination of the flue gas is achieved.

Description

technical field [0001] The invention relates to the technical field of flue gas treatment, in particular to a flue gas treatment method and device. Background technique [0002] At present, the flue gas desulfurization process used in China is usually wet desulfurization, especially after the ultra-clean emission transformation of boilers in thermal power enterprises, almost all wet desulfurization processes have been adopted. However, the moisture content of flue gas after wet desulfurization is relatively high (13-15%), and the temperature is low (45-55°C). A large amount of water vapor in the air condenses into small droplets. After the refraction and heat dissipation of light, the wet smoke appears white or gray, which is called "wet smoke plume" (commonly known as "big white smoke"), causing smog to surround and affect the environment. Vision can also cause dew point corrosion, and at the same time, it may provide a photochemical reaction environment for nitrogen oxide...

AI Technical Summary

Problems solved by technology

However, the moisture content of flue gas after wet desulfurization is relatively high (13-15%), and the temperature is low (45-55°C). A large amount of water vapor in the air condenses into small droplets. After the refraction and heat dissipation of light, the wet smoke appears white or gray, which is called "wet smoke plume" (commonly known as "big white smoke"), causing smog to surround and affect the environment. Vision can also cause dew point corrosion, and at the same time, it may provide a photochemical reaction environment for nitrogen oxides, sulfur dioxide and water molecules, thereby affecting the quality of the air environment

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