Cleaning method and equipment for denitration catalyst

Abstract

The invention relates to the technical field of desulfurization and denitrification equipment, and discloses a denitration catalyst cleaning method which comprises the following steps: injecting cleaning liquid into an ultrasonic cleaning pool, and immersing a catalyst module into the ultrasonic cleaning pool; adopting ultrasonic waves to conduct oscillation descaling on the inner side wall of a pore channel of the catalyst module and the outer side wall of the catalyst module at the same time, meanwhile, keeping one end of the pore channel of the catalyst module in an open state, and adopting negative pressure to suck the other end of the pore channel of the catalyst module; and heating and drying the catalyst module in a drying box. Meanwhile, the invention further provides cleaning equipment for the denitration catalyst, the pore channels of the catalyst module can be sucked, the ultrasonic vibration rod is inserted into the pore channels of the catalyst module for cleaning, and an ultrasonic generation plate and the outer side wall of the catalyst module are subjected to vibration cleaning. According to the cleaning method and equipment, the catalyst module with micron-sized communicating holes can be cleaned while flowing of the cleaning liquid is utilized, and the cleaning efficiency of the catalyst module is improved.

Description

technical field [0001] The invention relates to the technical field of desulfurization and denitrification equipment, in particular to a method and equipment for cleaning a denitration catalyst. Background technique [0002] Coal-fired power plants produce a large amount of nitrogen oxides (NOx) when burning coal, which is currently recognized as the main cause of environmental problems such as acid rain, regional smog, and photochemical smog. After the implementation of the new environmental protection law, thermal power plants need to remove nitrogen oxides in flue gas through a series of methods. In practice, catalysts are often used to improve the removal efficiency of nitrogen oxides. At present, coal-fired power plants mainly use selective catalytic reduction (SCR) denitration technology to control NOx emissions, and the core of the entire denitration reactor is the SCR catalyst. [0003] Patent CN109012645A (application number: 201810902728.1) discloses a porous tubu...

AI Technical Summary

Problems solved by technology

[0003] Patent CN109012645A (application number: 201810902728.1) discloses a porous tubular denitration catalyst and its preparation method. The core of the denitration reactor is an SCR catalyst. After a period of use, the efficiency of the catalyst will be reduced due to deactivation, and the denitration catalyst is dangerous. Chemical waste, non-qualified catalyst treatment plants cannot be recycled

In practice, the efficiency of the cleaning process of the catalyst is not high, especially for the new type of catalyst module in the patent CN109012645A, the cleaning efficiency of the connected micron-scale holes is not high, and the connected micron holes on the catalyst surface and the catalyst The dust in the level hole cannot be removed in time, and the effect of cleaning and recycling the catalyst module is not good.

Images