Method for regenerating vanadium-titanium SCR denitration catalyst by utilizing regeneration activity complementing solution

Abstract

The invention discloses a method for regenerating a vanadium-titanium SCR denitration catalyst by utilizing a regeneration activity complementing solution. The method comprises the steps of deactivated catalyst preliminary treatment, ultrasonic water washing, acid pickling, novel regeneration activity complementing solution preparation, novel regeneration activity complementing solution dipping, microwave calcining treatment and the like. A complexation product of a valonea extract aqueous solution and vanadium serves as a novel regeneration activity complementing solution; through uniform adsorption of organic matters to the surface of the catalyst and stabilization of complexing ions, vanadium can form a uniform load layer on the surface of the catalyst, the production efficiency of regeneration of the deactivated catalyst is increased, and the load amount of active ingredients on the surface of the catalyst is increased; complexed organic matters can be simply removed through a microwave calcining method, the implementation is easy, and the subsequent use of the regenerated catalyst is unaffected; the agglomeration of vanadium in the solution and on the surface of the catalyst is effectively avoided, the utilization ratio of vanadium is increased, the consumption of vanadium required for regeneration is lowered, and thus, the overall regeneration cost is reduced.

Description

technical field [0001] The invention relates to the field of regeneration of SCR denitration catalysts, in particular to a method for regenerating vanadium-titanium series SCR denitration catalysts by utilizing a regenerating invigorating liquid. Background technique [0002] Nitrogen oxides are recognized as one of the major air pollutants in the world. They destroy the ozone layer, form photochemical smog, affect the ecological environment, and endanger human health. Thermal power plants are the main source of nitrogen oxide emissions. Since January 1, 2012, the "Emission Standards for Air Pollutants from Thermal Power Plants" (GB 13223-2011) put forward more stringent regulations on the emission of nitrogen oxides from thermal power plants. This is currently the most stringent NOx emission standard in the world. The denitrification rate of SCR flue gas denitrification technology is over 90%, and the technology is mature. SCR flue gas denitrification devices are widely us...

AI Technical Summary

Problems solved by technology

The traditional rejuvenating liquid usually uses an aqueous solution of active components such as vanadium to deposit the active components on the surface of the catalyst under a certain pH condition. This method is difficult to control the dispersion of active component particles such as vanadium oxide deposited on the surface of the catalyst. The particles are easy to agglomerate on the surface of the catalyst, resulting in ineffective accumulation, thereby increasing the amount of regeneration and activating fluid required for regeneration, and increasing the cost of regeneration

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