Flue gas denitrification device of coal-fired boiler

Abstract

The invention discloses a flue gas denitrification device of a coal-fired boiler. The flue gas denitrification device comprises a coal-fired boiler, a bag-type dust collector, a fan, an SCR reactor, an ammonia vaporizer and a wet electric precipitator, and is characterized in that the coal-fired boiler is with the bag-type dust collector, the fan, the SCR reactor, the ammonia vaporizer and the wet electric precipitator through pipelines; a catalyst layer is arranged in the middle of the SCR reactor; the upper part of the SCR reactor is connected with an ammonia / air mixer; one path of the ammonia / air mixer is connected with an ammonia diluting fan; the other path of the ammonia / air mixer and an ammonia buffer slot outlet are connected with the ammonia vaporizer. The flue gas denitrification device can remove pollutants, such as NOx, mercury, dioxin and flue dust, in flue gas of the coal-fired boiler, the removal efficiency of fine particles and aerosol in the flue gas through the wet electric precipitator is 99 to 99.99 percent, and efficient removal of combined pollutants, such as fine dust particles and SO3 acid mist, in the flue gas is realized; up-to-standard discharge of the flue gas is realized, and environmental pollution is reduced.

Description

technical field [0001] The invention relates to a flue gas denitrification device, in particular to a coal-fired boiler flue gas denitrification device, which belongs to the technical field of environmental protection. Background technique [0002] At present, for the treatment of flue gas from coal-fired boilers, the denitrification process mainly uses ammonia water as a reducing agent to react with nitrogen oxides in the flue gas; the above method has many disadvantages: [0003] (1) The denitrification process mainly uses ammonia water as a reducing agent to react with nitrogen oxides in flue gas; its disadvantage is that ammonia water and liquid ammonia are dangerous goods and are not convenient for transportation and storage. [0004] The traditional flue gas denitrification device has a certain effect on the removal of NOx in the flue gas, but it has a certain effect on fine dust, SO 3 The removal efficiency of complex pollutants such as acid mist is very low; [000...

AI Technical Summary

Problems solved by technology

With the continuous development of industry, the harm caused by atmospheric compound pollutants to the environment is becoming more and more serious. The existing technology for removing compound pollutants in flue gas still cannot achieve the desired effect. Therefore, it is very necessary to explore a new, Efficient removal of fine dust, SO 3 Acid mist and other composite pollutant technologies to reduce environmental pollution

Images