Online regeneration system of denitrification catalyst

Abstract

The invention relates to an online regeneration system of a denitrification catalyst, and belongs to the field of flue gas treatment. The online regeneration system of the denitrification catalyst comprises a flue gas inlet, a flue gas inlet three-way valve, a cleaning fluid and replenishing fluid inlet, a group A denitrification catalytic unit, a group B denitrification catalytic unit, a heatingelement, a pollutant outlet, a flue gas outlet three-way valve, a flue gas analyzer and a flue gas outlet. Flue gas enters the group A denitrification catalytic unit or the group B denitrification catalytic unit to be subjected to denitrification through the flue gas inlet three-way valve, and the flue gas subjected to the denitrification is monitored online through the flue gas analyzer. When theconcentration of NOx in the flue gas is greater than 50mg / m<3>, the flue gas inlet three-way valve and the flue gas outlet three-way valve are simultaneously switched, and the working states of the group A denitrification catalytic unit or the B group denitrification catalytic unit are switched, the denitrification catalytic unit which does not work is cleaned to remove salts and dust on the surface of the catalyst, and replenishing fluid is supplemented and heated and dried to remove water, and temperature rise is performed continuously to activate the denitrification catalyst; online regeneration of the denitrification catalyst is realized, the service life of the catalyst is prolonged and the operation cost of a denitrification device is lowered.

Description

technical field [0001] The invention belongs to the technical field of flue gas treatment, and in particular relates to an online regeneration system for a denitrification catalyst. Background technique [0002] The denitrification catalyst is deactivated due to poisoning such as deposited dust, alkali metal salt, ammonium salt, etc., and the catalytic activity is also reduced due to the reduction of catalyst surface active substances due to mechanical wear. After the denitrification catalyst is deactivated, the NO in the flue gas x The concentration rises sharply, seriously polluting the air. Therefore, solving the deactivation problem of denitrification catalysts has become a hot and difficult point in the field of flue gas treatment. [0003] Chinese Invention Patent (Application No. 201810492114.0) discloses a solvothermal green and efficient regeneration method for sintered flue gas invalid SCR denitrification catalysts. The disassembled catalysts are realized through...

AI Technical Summary

Problems solved by technology

However, this patent only involves the regeneration of the catalyst through dust removal, and does not involve the regeneration of the active components of the catalyst, and the regeneration effect is not ideal

[0004] To sum up, the existing denitrification catalyst regeneration has disadvantages such as shutting down and dismantling, and the regeneration effect is not ideal.

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