Condensation and reheating integration type smoke plume white-eliminating system

Abstract

The invention relates to a condensation and reheating integration type smoke plume white-eliminating system. The system comprises a denitration device, a flue gas waste heat utilization device, an electrostatic precipitator, a wet desulphurization device, an induced draft fan, a tail flue gas heater and a chimney which are connected in series in order, wherein the flue gas waste heat utilization device is used for recovering flue gas waste heat, and the tail flue gas heater is used for raising flue gas temperature. Compared with the prior art, the system utilizes the flue gas waste heat to heat condensed water, recovers the flue gas waste heat, and reduces the salt content; the tail flue gas heater utilizes a steam turbine to extract air so as to heat flue gas and raise the flue gas temperature; at the moment, the salt content of the steam of flue gas is not high, the steam temperature is raised, and the density declines; and thus, the flue gas is beneficially diffused to higher heightafter being discharged into the atmosphere, the local concentration of the flue gas discharged into the atmosphere is reduced, and the impact of flue gas containing smoke on the environment is reduced.

Description

technical field [0001] The invention relates to a tail flue gas treatment system of a coal-fired power plant, in particular to a condensation-reheating integrated smoke plume whitening system. Background technique [0002] Extensive use of coal will inevitably bring about many environmental problems. Coal combustion will produce many air pollutants, such as nitrogen oxides, sulfur oxides, dust, heavy metals, etc. Effective technical measures should be taken to purify the tail gas of coal-fired power plants to meet increasingly stringent environmental protection requirements. Sulfur dioxide is one of the main pollutants in the tail gas of coal-fired power plants, which is a huge hazard to humans and the environment. Limestone-gypsum wet desulfurization is a relatively mature desulfurization process for power plants at present, but it needs to inject a large amount of absorbing slurry during the desulfurization process, resulting in an increase in the moisture content of the ...

AI Technical Summary

Problems solved by technology

Limestone-gypsum wet desulfurization is a relatively mature desulfurization process for power plants at present, but it needs to inject a large amount of absorption slurry during the desulfurization process, resulting in an increase in the moisture content of the flue gas, and it is easy to form a large amount of white plume at the chimney outlet, which affects the appearance

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