Denitration efficiency improving device based on SCR reactor lifting and urea direct injection technology

Abstract

The invention discloses a denitration efficiency improving device based on SCR reactor lifting and urea direct injection technology. A newly-added catalyst layer stand column is vertically fixed on an original denitration reactor stand column, an original reactor shell is fixed on the side surface of the original denitration reactor stand column, a newly-added reactor shell is fixed on the side surface of the newly-added catalyst layer stand column, the bottom of the newly-added reactor shell is communicated with the top of the original reactor shell, the structural frame is fixed in the newly-added reactor shell, and the newly-added catalyst is located on the structural frame; an outlet of the original SCR inlet flue is communicated with an inlet of the newly-added SCR inlet flue, an outlet of the newly-added SCR inlet flue is communicated with a top inlet of the newly-added reactor shell through the reactor top cover and the top original flue, and the device can meet the requirement for ultralow emission.

Description

technical field [0001] The invention belongs to the field of ultra-low-emission environmental protection transformation of coal-fired power plants, and relates to a denitrification and efficiency-improving device based on SCR reactor lifting and urea direct injection technology. Background technique [0002] At present, SCR denitrification technology has become the most extensive and mature flue gas purification technology for coal-fired power plants to fully implement ultra-low emission of air pollutants. SCR denitrification technology has high denitrification efficiency (up to 90%), small secondary pollution, Mature and reliable technology and other advantages. [0003] Most of the domestic coal-fired power plants in the initial stage of environmental protection transformation of SCR denitrification process catalyst layers are arranged according to the "2+1" pattern, with 2 layers initially installed and 1 layer reserved, and some "W" flame boilers SCR denitrification proc...

AI Technical Summary

Problems solved by technology

With the severe situation of environmental protection, the state has introduced the NOx emission concentration control at 50mg / m 3 Ultra-low emission standards, and some areas even introduced NOx emission concentration control at 30mg / m 3 Therefore, the denitrification efficiency of the original denitrification device cannot meet the ultra-low emission requirements, and the environmental protection equipment must be improved and upgraded

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