A flue gas treatment method and device based on energy quality deployment

Abstract

The invention provides a flue gas treatment method and device based on energy quality allocation, and relates to the technical field of flue gas treatment. The flue gas treatment method provided by the present invention comprises the following steps: performing first heat exchange between the flue gas to be treated and the first working fluid to obtain the first flue gas; performing wet desulfurization on the first flue gas to obtain the first flue gas Two flue gas; the second flue gas and the second working substance are subjected to a second heat exchange to obtain a third flue gas; the third flue gas is heated and discharged; the first working substance and the second working substance The compositions of the working fluids are the same, and the first working fluid is obtained by raising the temperature of the second working fluid. The flue gas treatment method provided by the invention can improve the desulfurization efficiency of the flue gas, and can achieve the purpose of dehumidification and whitening of the flue gas while adopting a wet desulfurization process for desulfurization.

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 based on energy quality allocation. 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 the flue gas after wet desulfurization is relatively high (13-15%), and the temperature is low (45-55°C). A large amount of water vapor condenses into small droplets when condensed. 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 and affecting vision. , will also cause dew point corrosion, and at the same time may provide a photochemical reaction environment f...

AI Technical Summary

Problems solved by technology

However, the moisture content of the flue gas after wet desulfurization is relatively high (13-15%), and the temperature is low (45-55°C). A large amount of water vapor condenses into small droplets when condensed. 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 and affecting vision. , will also cause dew point corrosion, and at the same time 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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