Active impregnation solution and preparation method thereof

Abstract

The invention provides an active impregnation solution and a preparation method thereof. The active impregnation solution is prepared from the following components: 0.1wt%-0.5wt% of a penetration enhancer, 0.1wt%-0.5wt% of an emulsifier, 0.02wt%-0.1wt% of a surfactant, 1wt%-10wt% of a cosolvent, 1wt%-10wt% of ammonium metavanadate, 1wt%-10wt% of ammonium paratungstate, 1wt%-10wt% of ammonium heptamolybdate, and the balance of de-ionized water and acid, wherein the cosolvent is acetamide. The active impregnation solution provided by the invention has a good supplementation effect on active components of an SCR (Selective Catalytic Reduction) denitration catalyst and the activity recovery rate of the supplemented SCR denitration catalyst is high.

Description

technical field [0001] The invention relates to the technical field of catalyst regeneration, and more specifically relates to an active impregnating solution and a preparation method thereof. Background technique [0002] Coal is one of the main energy sources in the world. It accounts for about 70% of China's primary energy consumption, of which 85% is used through combustion. The flue gas produced by coal combustion contains a large amount of nitrogen oxides, which is extremely harmful to the environment. Therefore, my country has strictly controlled the emission standards of nitrogen oxides. [0003] At present, coal-fired power plants generally adopt Selective Catalytic Reduction (hereinafter referred to as SCR) denitrification technology to control the emission of nitrogen oxides. Among them, the catalyst is the core of SCR denitrification technology, and the cost accounts for 30% of the total investment of the denitrification project. 50%, and its performance directly...

AI Technical Summary

Problems solved by technology

[0005] However, the existing active impregnation solution has a general supplementary effect on the active components of the SCR denitration catalyst. For example, the Chinese patent with the publication number CN102059156A discloses a denitration catalyst regeneration solution and a regeneration method thereof. The activity recovery rate of the catalyst after regeneration is 95%- 99%; Another example is that the Chinese patent with publication number CN103816946A discloses a cleaning solution for regenerated SCR denitration catalyst and a method for regenerating SCR denitration catalyst. The denitration efficiency of the catalyst after regeneration is only 63% to 72%.