Boiler fume denitration and desulfuration dedusting device and process

Abstract

The invention discloses a boiler fume denitration and desulfuration dedusting device and process. The device comprises a supergravity rotation bed pollution control device I, wherein the air inlet of the supergravity rotation bed pollution control device I is connected with the fume outlet of a boiler; the alkaline absorption liquid adding opening of the supergravity rotation bed pollution control device I is connected with an alkaline absorption liquid circulation water pool; the sewage discharging opening of the supergravity rotation bed pollution control device I is connected with the alkaline absorption liquid circulation water pool; the supergravity rotation bed pollution control device I is connected with a low-temperature plasma purification device; and the low-temperature plasma purification device is connected with a supergravity rotation bed pollution control device II. By using the scheme, the structure design is reasonable, waste water, waste gas and waste solids are not generated, the ammonia escape is avoided, the environment protection is realized, no catalyst is used, the dependence on ammonia is avoided, certain safety problems generated in use of ammonia are thoroughly avoided, the efficiency of removing fume particulate matters, sulfur oxides and nitric oxides is high, and the stable standard discharging is realized.

Description

Technical field: [0001] The invention relates to a boiler flue gas denitration, desulfurization and dust removal device and process. Background technique: [0002] The harmful substances in boiler flue gas are mainly smoke and SO 2 As with NOx, the traditional bag dust removal + desulfurization tower is used for desulfurization and dust removal. The system has large resistance, high operating costs, unstable treatment effects, high maintenance costs, and cannot simultaneously denitrify. SCR and SNCR are generally used for denitration. The SNCR method is also a selective non-catalytic reduction method. Its main raw material is urea. The problems are: low denitration efficiency, less than 50%, serious ammonia escape, affecting the surrounding environment and affecting boiler efficiency; SCR The method is the selective catalytic reduction method, and its main raw material is urea. The problem is that the denitration efficiency is low, 60-80%, the catalyst is easily blocked, the smo...

AI Technical Summary

Problems solved by technology

[0002] Harmful substances in boiler flue gas are mainly soot, SO 2 and NOx, desulfurization and dedusting traditionally use bag dust removal + desulfurization tower, the system resistance is large, the operation cost is high, the treatment effect is unstable, the maintenance cost is high, and denitrification cannot be performed at the same time

At present, SCR and SNCR are generally used for denitrification. The SNCR method is also a selective non-catalytic reduction method. The main raw material is urea. The problems are: the denitrification efficiency is low, less than 50%, and the ammonia escape is serious, which affects the surrounding environment and affects the boiler efficiency; SCR The method is the selective catalytic reduction method, and its main raw material is urea

Existing problems are: low denitrification efficiency, 60-80%, the catalyst is easy to block, smoke and dust affect the life of the catalyst, ammonia escape is serious, there is corrosion, and the surrounding environment is affected

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