A scr denitration device

Abstract

The invention discloses an SCR denitrification device which comprises a gas inlet mixing section, a rotating cylinder, a fan impeller, a rectification section and a catalysis section. A reducing agent supply pipe and a fixing frame are arranged inside the gas inlet mixing section, the outlet end of the reducing agent supply pipe is fixed to the fixing frame, the reducing agent supply pipe is led out of the gas inlet mixing section; the rotating cylinder is rotationally assembled at the outlet end of the reducing agent supply pipe, a plurality of spraying pipes are connected to the side wall of the rotating cylinder, a plurality of backlash spraying holes are uniformly formed in the side wall of each spraying pipe, and the axial lead of each backlash spraying hole and the axial lead of the rotating cylinder are orthogonal; a hub of the fan impeller is rotationally assembled on the side wall of the reducing agent supply pipe; the rectification section and the gas inlet mixing section are connected, and a rectification device is arranged inside the rectification section; one end of the catalysis section is connected with the rectification section, and the catalysis section is filled with a catalyzer module. According to the SCR denitrification device, the sprayed reducing agent can be mixed with boiler flue gas to be uniform within a short period of time, and the denitrification efficiency can be improved.

Description

technical field [0001] The invention belongs to the technical field of flue gas purification, and in particular relates to an SCR (Selective Catalytic Reduction, selective catalytic reduction technology) denitrification device. Background technique [0002] Nitrogen oxides are the main harmful gases in the flue gas produced by fuel combustion, which mainly include NO and NO 2 At present, SCR denitrification devices are mainly used to purify flue gas. The principle is to convert nitrogen oxides in flue gas into harmless nitrogen and water under the action of reducing agents and catalysts, so that nitrogen in flue gas Oxygen compound removal, in which the mixing of reducing agent and flue gas is a key step, the current SCR denitrification device generally has the problem of long distance required for the mixing of reducing agent and flue gas, and uneven mixing of reducing agent and flue gas, which will lead to smoke Insufficient gas reduction reaction reduces denitrification ...

AI Technical Summary

Problems solved by technology

[0002] Nitrogen oxides are the main harmful gases in the flue gas produced by fuel combustion, which mainly include NO and NO 2 At present, SCR denitrification devices are mainly used to purify flue gas. The principle is to convert nitrogen oxides in flue gas into harmless nitrogen and water under the action of reducing agents and catalysts, so that nitrogen in flue gas Oxygen compound removal, in which the mixing of reducing agent and flue gas is a key step, the current SCR denitrification device generally has the problem of long distance required for the mixing of reducing agent and flue gas, and uneven mixing of reducing agent and flue gas, which will lead to smoke Insufficient gas reduction reaction reduces denitrification efficiency

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