Device for on-line cleaning of selective catalyctic reduction (SCR) denitration catalyst and cleaning process thereof

Abstract

The invention relates to a device for on-line cleaning of a selective catalyctic reduction (SCR) denitration catalyst and a cleaning process thereof. The device is formed through integrating a soot blower, a cleaning device, a waste liquid collecting device and a hot air drying device, in addition, the on-line cleaning on the catalyst is carried out in the early period of the catalyst invalidation, and catalyst surface sediments, pore blockage substances, alkali metal and other soluble toxic substances are removed. The technology has the advantages that the catalyst activity is improved, the service life of the catalyst is prolonged, the denitration efficiency is improved, the nitrogen oxide discharge is reduced, simultaneously, the cleaning process of the catalyst is simplified, the dismounting and handling work is not needed, the unnecessary loss caused by the dismounting and handling work is avoided, the catalyst cleaning period is shortened, and a large amount of operation cost issaved for enterprises using the SCR denitration catalyst.

Description

technical field [0001] The invention belongs to the technical field of cleaning devices and processes thereof, in particular to a device for cleaning SCR denitration catalysts online and a cleaning process thereof. Background technique [0002] The emission control of nitrogen oxides in thermal power plants is a key task in the field of energy conservation and environmental protection during the country's "Twelfth Five-Year Plan". X The emission concentration has established the most stringent control standard in the world. With the promulgation of national policies, how to effectively control the emission of nitrogen oxides has become one of the important issues to be solved in the field of environmental protection. [0003] At present, the flue gas denitrification of thermal power plants mainly adopts Selective Catalytic Reduction (SCR). The SCR catalyst is the core of the SCR flue gas denitrification system. At present, the activity of the SCR catalyst in use will cont...

AI Technical Summary

Problems solved by technology

Off-line cleaning can thoroughly clean the SCR denitrification catalyst and improve the denitrification efficiency and activity of the catalyst. However, the problem with this technology is that the catalyst needs to be disassembled and transported. This process is cumbersome, complicated, and requires many engineers. The cycle of catalyst cleaning is increased, which is not conducive to reducing the operating costs of enterprises

At the same time, in the process of dismantling and transporting the catalyst, it is easy to cause damage to the catalyst, which will easily cause secondary pollution to the environment while bringing unnecessary losses to the enterprise.

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