Manufacturing method and process device of reactivated cleaning agent for regeneration of honeycomb SCR (selective catalytic reduction) denitration catalyst

Abstract

The invention discloses a manufacturing method and process device of a reactivated cleaning agent for regeneration of a honeycomb SCR (selective catalytic reduction) denitration catalyst. The deactivated SCR denitration catalyst in the process device is regenerated through the steps of pressurized water spraying, ultrasonic cleaning, secondary pressurized water spraying, acid washing, forced air drying, active component supplementation, secondary forced air drying, step-by-step calcination and the like in sequence. By using (NH4)2SO4 as a main component of an acid washing solution, potential hazards caused by sulfuric acid are avoided, and the economic performance and the safety are realized. The components such as EDTA (ethylene diamine tetraacetic acid) are added into the cleaning agent, and under the chelation of the EDTA and heavy metal elements, the toxic action on the denitration catalyst caused by the heavy metal elements can be well eliminated. According to the process, the denitration activity of the deactivated catalyst can be recovered, and meanwhile, the structural strength of the catalyst can be kept. The process device is simple, suitable for regeneration in hoisting transportation, and high in efficiency. By the promotion of the process, the performance of the regenerated honeycomb SCR catalyst can be improved, the replacement cost of the catalyst is saved, and the process has an important significance on NOX control.

Description

technical field [0001] The invention relates to the engineering technical field of denitrification catalyst regeneration in power plants, in particular to a manufacturing method and process device for realizing the deactivation honeycomb selective catalyst (SCR) denitrification catalyst regeneration, regeneration and revival cleaning agent. It is used to realize the regeneration and utilization of the denitration catalyst and save the cost of catalyst replacement. Background technique [0002] my country is a country where coal is the main energy source, and the main source of electricity is the direct combustion of coal in thermal power plants. Pollutants emitted by power plants include absorbable solid particles, carbon dioxide, sulfur dioxide, and nitrogen oxides (NOX), which have brought about environmental problems such as greenhouse effect, acid rain, and photochemical aversion. Among them, nitrogen oxide (NOX) emissions reached 12.07 million tons in the first half ...

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Problems solved by technology

The Chinese patent with the publication number CN102266723A mainly provides a process of using an autoclave to expand the pores of the catalyst during the regeneration process. However, the pore-enlarging agent used in this process, such as methanol, will cause secondary pollution, and the temperature rises. There are safety hazards in realizing the rapid pressure relief under the conditions, and the process has problems such as processing time and so on.

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