Boiler flue gas denitration system adopting SNCR/SCR mixing process

Abstract

The invention discloses a boiler flue gas denitration system adopting a SNCR / SCR mixing process. The structure of the system comprises a gas inlet, a gas buffer brush, a stainless steel shell, an anticorrosive copper plating film, a first-stage superheater, a first-stage boiler economizer, a high-temperature cyclone dust removal device, a sealing ring, a material return device, a water storage groove, an anticorrosive hose, an amino substance solution controller, an atomizing device, a regulating valve, a second-stage superheater, an amino substance solution storage tank, a soot blower, a small motor, a SCR denitration catalysis layer, a second-stage boiler economizer, a static mixer, a desulfurization chamber, a demister, a rectifying grid and a chimney port, wherein the gas buffer brushis fixed on the inner side of the gas inlet, the regulating valve is connected to the atomizing device through the anticorrosive hose, the high-temperature cyclone dust removal device is connected tothe material return device through the sealing ring, and the chimney port is fixed at the uppermost end of the rectifying grid. According to the present invention, the boiler flue gas denitration system has characteristics of simple structure, no secondary pollution, long service life and optimal denitration effect.

Description

technical field [0001] The invention relates to the technical field of boiler flue gas denitrification, in particular to a boiler flue gas denitrification system adopting an SNCR / SCR mixed process. Background technique [0002] Nitrogen oxides are one of the main sources of air pollution. The so-called nitrogen oxides (NOX) mainly include NO, NO2, N2O3, N2O5, etc. Among them, NO and NO2 are the main pollutants that pollute the atmosphere. Under the action of sunlight, NOX will cause photochemical reaction and form photochemical smog, thus causing serious air pollution. Since the 1970s, the air pollution problem of NOX has been paid more and more attention. It has been found that the damage to human health, high-content nitric acid rain, photochemical smog, ozone reduction and other problems are all related to low-concentration NOX, and its harmfulness is higher than that of people. Much larger than originally envisioned. Flue gas denitrification refers to the reduction of ...

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Problems solved by technology

[0004] In view of the above problems, the present invention provides a boiler flue gas denitrification system adopting SNCR / SCR hybrid technology, which solves the problem of lack of SNCR function and anti-corrosion function, long-term replacement of parts and components, and low denitrification efficiency, which may easily cause secondary pollution , there is no equipment for water storage times, and water seepage is prone to occur, resulting in the problem of low service life of the equipment

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