SCR low-temperature denitration device

Abstract

The invention provides an SCR low-temperature denitration device, and the device comprises: a reactor shell, which is equipped with a flue gas inlet and a flue gas outlet; an ammonia spraying grid, which is provided with spraying heads; and a catalyst storage cylinder, wherein a flue gas overflow channel is reserved between the catalyst storage cylinder and the inner side wall of the reactor shelland is communicated with the flue gas outlet; the catalyst storage cylinder comprises a catalyst outer cylinder and a catalyst inner cylinder located in the catalyst outer cylinder, a material turning piece is installed in the catalyst inner cylinder, the material turning piece is provided with a fork-shaped piece capable of rotating in a reciprocating mode, and the fork-shaped piece stirs catalyst particles in the catalyst inner cylinder when rotating; a reactor inner pipe is located in the middle of the catalyst outer cylinder, the catalyst inner cylinder abuts against the reactor inner pipe, an air inlet is formed in the top of the reactor inner pipe, the bottom of the reactor inner pipe is of a sealed structure, and flue gas entering the reactor inner pipe from the air inlet passes through the catalyst inner cylinder and the catalyst outer cylinder in the radial direction and then enters the flue gas overflow channel. The problems that the catalyst in a denitration reactor is easyto cake and inactivate and the catalytic efficiency is low can be solved.

Description

Technical field [0001] The present invention belongs to the technical field of environmental protection equipment, and more particularly to a SCR low temperature denitration device. Background technique [0002] Pollutants in the smoke in the migrant of the fire, sulfur dioxide, nitrogen oxides, etc., the flue gas control path can be treated first, then enter the high-temperature bag dust, then enter the SCR reactor denitration, and finally discharged from the air blower. In the chimney. [0003] Since the flue gas after desulfurization still contains a small amount of SO X It has a catalyst to be catalyst or inactivated by a catalyst that is adsorbed to the reactor after reacting the ammonia gas in the SCR reactor, and the ammonium salt is easily catalyst or deactivated due to increased viscosity, and shorten the operating cycle of the catalyst. In addition, since the catalyst bed is usually a fixed bed, the contact area of ​​the flue gas and the catalyst is small in the premise...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a SCR low-temperature denitration device to solve the problems of easy agglomeration and deactivation of the catalyst in the denitration reactor, the adsorption of the catalyst to the flue gas, insufficient cooling effect, and low catalytic efficiency.

Images