Lifting type on-site regeneration device for SCR (Selective Catalytic Reduction) catalyst

Abstract

The invention discloses a lifting type on-site regeneration device for an SCR (Selective Catalytic Reduction) catalyst. The device comprises a fixing supporting frame which is abutted with an SCR catalyst on-site reaction station, wherein a liquid storing assembly is arranged at the bottom end of the fixing supporting frame; a conveying lifting assembly which can extend into the liquid storing assembly is arranged in the fixing supporting frame; an abutting assembly which is abutted with an SCR catalyst at the reaction station is arranged at the bottom end of the conveying lifting assembly; aheating lifting assembly for heating the SCR catalyst is arranged above the abutting assembly on the conveying lifting assembly. The device has the advantages of being simple and compact in structure,short in period, low in cost, small in workload, and high in regeneration quality.

Description

technical field [0001] The invention mainly relates to the field of flue gas purification, in particular to an on-site regeneration equipment for a lift-type SCR catalyst. Background technique [0002] In recent years, with the reduction of my country's environmental capacity and the stricter national emission standards for nitrogen oxides, the pressure to reduce nitrogen oxides is increasing. At present, coal-fired power plants' control of nitrogen oxide emissions is mainly divided into pre-generation control and post-generation control. Pre-generation control mainly includes low-nitrogen combustion technology and re-combustion technology, and post-generation control is mainly divided into dry method and wet method. The post-combustion control of coal-fired power plants in my country mainly adopts the Selective Catalytic Reduction (SCR) method in the dry process, which is applied to the flue gas denitrification system. This technology is basically applied in most power pla...

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Problems solved by technology

However, the life of the catalyst is generally 3 to 5 years due to surface ash clogging, poisoning, and wear, and the cost of the catalyst is high. Therefore, it is necessary to use the method of catalyst regeneration and activation to reduce the operating cost of the SCR system.

[0004] At present, the regeneration method of SCR denitrification catalyst in coal-fired power plants is to remove the SCR catalyst module and send it to the regeneration factory, and regularly turn over the regenerated SCR catalyst module in the cleaning tank and regeneration tank, because the volume and weight of the catalyst module are relatively large At the same time, the catalyst wall is thin, which is not suitable for strong agitation or transportation. In addition, most of the existing SCR denitrification catalyst regeneration devices are designed and manufactured for each process, resulting in the existing SCR denitrification catalyst regeneration devices occupying an excessively large area and costing construction funds

Moreover, due to the continuity of the regeneration process, it is necessary to move the SCR denitration catalyst module to be regenerated from one device to another for multiple transportations. During the transportation process, it is very easy to cause damage to the SCR denitration catalyst module to be regenerated, thereby affecting regeneration. quality

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