SNCR denitration deodorizing method

Abstract

The invention discloses an SNCR denitration deodorizing method. The method comprises the following steps: 1, inputting sewage and a leachate into a regulating tank, regulating the sewage and the sewage, pouring the adjusted sewage into a precipitation tank, and pumping obtained sewage to an intermediate water tank for secondary treatment; 2, denitrifying the sewage in the intermediate water tank, and carrying out primary nitration and secondary nitration; 3, separating the sewage through a nanofiltration system to obtain a clear liquid and a concentrate, and discharging the purified thick liquid into a concentrate tank for outward transportation; and 4, extracting air used for combustion supporting from a garbage pool, preheating the air, inputting the preheated air into a garbage incinerator to make the preheated air be mixed with the concentrate obtained in step 3 in the concentrate tank, and spraying the obtained solution into the garbage incinerator in order to realize a purifying effect. Sewage generated in the garbage deodorizing process is purified and reused, and the concentrate generated in the purifying process can be used in denitration of garbage incineration, so sewage purification and facilitation of purification of garbage incineration flue dust are simultaneously realized.

Description

technical field [0001] The invention relates to an SNCR denitrification and deodorization method. Background technique [0002] With the rapid development of social economy, the urban domestic garbage is also increasing rapidly, and these domestic garbage are gradually polluting the environment. The common disposal methods of domestic waste include landfill and incineration. The existing incineration methods are usually used for waste incineration to generate electricity. However, since domestic waste contains nitrogen-containing inorganic and organic matter, the flue gas in the incineration process will contain a certain amount of NOx. If it is directly discharged into the atmosphere, it will cause acid rain, so the flue gas must be denitrified before discharge. At present, there are selective non-catalytic reduction and selective catalytic reduction for this kind of flue gas denitrification treatment. Selective catalytic reduction requires temperature and catalyst to work...

AI Technical Summary

Problems solved by technology

The common disposal methods of domestic waste include landfill and incineration. The existing incineration methods are usually used for waste incineration to generate electricity. However, since domestic waste contains nitrogen-containing inorganic and organic matter, the flue gas in the incineration process will contain a certain amount of NOx. If it is directly discharged into the atmosphere, it will cause acid rain, so the flue gas must be denitrified before discharge

At present, there are selective non-catalytic reduction and selective catalytic reduction for this kind of flue gas denitrification treatment. Selective catalytic reduction requires temperature and catalyst to work together to achieve the maximum effect. Its cost is high and the equipment occupies a large area. , the cost of selective non-catalytic reduction is low, and the temperature required for the reaction is close to the temperature in the waste incinerator, but usually the temperature of the waste incinerator will change after the air is introduced, which will affect the temperature of the reduction reaction, resulting in low efficiency , and even oxidize the reducing agent, resulting in high cost

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