Low-temperature denitration device for hazardous waste incineration flue gas

Abstract

The invention discloses a low-temperature denitration device for hazardous waste incineration flue gas, and the device comprises an alkali spraying and deacidification system which is used for carrying out an acid-base reaction on to-be-treated flue gas and alkali liquor to remove acidic gas in the flue gas to obtain first flue gas; the bag-type dust collector is used for capturing fly ash in the first flue gas to obtain second flue gas; the ammonia spraying system is used for mixing ammonia gas with the heated air to obtain mixed gas, and inputting the mixed gas into the low-temperature denitration reactor, so that the second flue gas reacts with the ammonia gas to convert oxynitride into nitrogen to obtain third flue gas; the low-temperature denitration control system is used for controlling the content of oxynitride and ammonium sulfate in the third flue gas, so that the amount of alkali liquor input by the alkali spraying and deacidification system and the concentration of atomized ammonia sprayed by the ammonia spraying system are controlled and adjusted according to the content of oxynitride and ammonium sulfate. The technical problems of various blockage and low-temperature corrosion in the process line process in the prior art are solved.

Description

technical field [0001] The present application relates to the technical field of environmental protection process control, in particular to a low-temperature denitrification device for flue gas from hazardous waste incineration. Background technique [0002] With the increasingly urgent ecological environment construction, the emission of air pollution such as urban garbage, industrial waste, electric power, coal chemical industry, and petroleum refining has become increasingly prominent. Therefore, national and local regulations are increasingly controlling the emission of various pollution factors in various industries strict. Since the flue gas produced by the incineration of urban garbage or industrial waste, or electric power, coal chemical industry, petroleum refining, etc. may contain a large amount of toxic and harmful substances, in order to control the content of dioxins or other harmful substances in the flue gas, it is necessary to The flue gas produced by indus...

AI Technical Summary

Problems solved by technology

[0004] The technical problem solved by this application is: in view of various blockages and low-temperature corrosion in the process line process in the prior art, this application provides a low-temperature denitrification device for hazardous waste incineration flue gas. The embodiment of this application provides In the plan, on the one hand, the low-temperature denitrification reactor is placed behind the bag filter, which shortens the process flow of the hazardous waste incineration system and reduces the risk of system clogging and corrosion; on the other hand, in order to reduce the risk of denitrification reactor clogging, an automatic Alkali spraying deacidification system to adjust the concentration of sulfur dioxide at the inlet of the low-temperature denitrification reactor

Images