Method for performing synchronous desulfurization, denitrification and dust removal in bag type dust collector

Abstract

The invention discloses a method for performing synchronous desulfurization, denitrification and dust removal in a bag type dust collector. The method is characterized by comprising the following steps: by taking the bag type dust collector as a reaction device, introducing coal-fired flue gas subjected to electric precipitation into the bag type dust collector through a connecting pipeline, and injecting manganese oxides into the connecting pipeline, so that the manganese oxides are used for performing desulfurization and denitrification on the coal-fired flue gas; allowing the unreacted manganese oxides, desulfurization and denitrification products and smoke dust to enter a filter bag of the bag type dust collector along with the coal-fired flue gas, and retaining the unreacted manganese oxides, desulfurization and denitrification products and smoke dust on the surface of the filter bag to form a filter layer; spraying ammonia gas into the coal-fired flue gas entering the bag type dust collector, and thus reducing the residual nitric oxides in the coal-fired flue gas into nitrogen by virtue of the ammonia gas; recovering and regenerating the materials on the filter layer, and recycling the obtained manganese oxides to be injected into the connecting pipeline. According to the invention, the bag type dust collector serves as a core device, the manganese oxides are taken as active materials, and synchronous and integrated desulfurization, denitrification and dust removal on the flue gas can be realized in the bag type dust collector through a series of separation, regeneration and recycling operations.

Description

1. Technical field [0001] The invention relates to the field of air pollution control, in particular to a method for synchronous desulfurization, denitrification and dust removal of flue gas. 2. Background technology [0002] Thermal power plants produce a large amount of SO in the process of high temperature combustion 2 , NO x , soot and other pollutants, nitrogen oxides in the air are the main source of fine particulate matter PM2.5, and thermal power plants are the largest emitters of nitrogen oxides. Therefore, it is imperative to denitrify power plants and reduce PM2.5 concentration without delay. Nitrogen oxides can also cause regional environmental pollution problems such as photochemical smog and ozone layer depletion. Thanks to SO 2 , NO x Emissions have caused acid rain in 81.6% of cities across the country, and increased severe weather such as smog across the country, which has seriously affected industrial and agricultural production, people's lives, and hu...

AI Technical Summary

Problems solved by technology

[0008] Aiming at the problems existing in the comprehensive treatment of flue gas pollution, the present invention invents a method for synchronous desulfurization, denitrification and dust removal in a bag filter, aiming at realizing synchronous desulfurization and denitrification, and further reducing the concentration of smoke and dust

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