Boiler fuel gas denitrification system adopting SNCR/SCR (Selective Non-catalytic Reduction/Selective Catalytic Reduction) mixing technology

Abstract

The invention discloses a boiler fuel gas denitrification system adopting an SNCR / SCR (Selective Non-catalytic Reduction / Selective Catalytic Reduction) mixing technology. The boiler fuel gas denitrification system structurally comprises a gas inlet, gas buffering brushes, a stainless steel shell, an anticorrosion copper-plated film, a primary superheater, a primary boiler economizer, a high-temperature cyclone dust removal device, a sealing ring, a feedback unit, a water storage groove, an anticorrosion hose, an amino substance solution controller, atomization devices, an adjusting valve, a secondary superheater, an amino substance solution storage tank, an ash blowing device, a small-size motor, an SCR denitrification catalyst layer, a secondary boiler economizer, a static mixer, a desulfurization chamber, a demister, a rectification grid and a chimney opening; the gas buffering brushes are fixed at the inner side of the gas inlet; the adjusting valve is connected with the atomizationdevices through the anticorrosion hose; the high-temperature cyclone dust removal device is connected with the feedback unit through the sealing ring; and the chimney opening is fixed at the uppermost end of the rectification grid. The boiler fuel gas denitrification system disclosed by the invention is simple in structure and secondary pollution is not caused; and the boiler fuel gas denitrification system has a relatively long service life and reaches an optimal denitrification 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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