Antitoxic regeneration solution of deactivated SCR denitration catalyst, and preparation method thereof

Abstract

The invention relates to an antitoxic regeneration solution of a deactivated SCR denitration catalyst, and a preparation method thereof. The antitoxic regeneration solution comprises an active replenisher, an antitoxic modification liquid, and an additive component. The active replenisher comprises ammonium metavanadate, ammonium tungstate, and acid liquid. The antitoxic modification liquid comprises germanium nitrate, ammonium molybdate tetrahydrate, and ammonium cerium nitrate. The additive component comprises a penetrating agent, a dispersing agent, and an adhesive. According to the invention, the prepared active replenisher, antitoxic modification liquid, and additive component are well mixed according to a certain weight ratio, such that an antitoxic regeneration solution is obtained. The solution and the preparation method provided by the invention have the advantages that: the deactivated catalyst is pickled, and active components are simultaneously replenished, such that catalyst denitrification efficiency is recovered to above 90%. With the existence of the antitoxic component, the antitoxic performance of the catalyst is substantially improved, such that catalyst arsenic, sulfur and alkali metal toxic effects can be effectively relieved, and service life of the catalyst after regeneration is prolonged.

Description

technical field [0001] The invention relates to a catalyst regeneration liquid and a preparation method thereof, in particular to an anti-toxic regeneration liquid suitable for deactivating SCR denitrification catalysts in coal-fired power plants and a preparation method thereof. Background technique [0002] As a primary pollutant, nitrogen oxides are harmful to human health and can also produce a variety of secondary pollution. It is one of the important precursors for the formation of ozone and is also an important cause of regional fine particle pollution and haze. In 2011, the national nitrogen oxide emissions did not fall but rose by 5.73%. In view of the adverse impact of nitrogen oxides on the atmospheric environment and the current severe situation of nitrogen oxide emission control in thermal power plants, the country proposed the "Twelfth Five-Year Plan" nitrogen oxide emission Planning and requirements: The total emission of nitrogen oxides in key industries and ...

AI Technical Summary

Problems solved by technology

However, the above-mentioned technology does not modify the anti-poison ability of the catalyst, which leads to the fact that the regenerated catalyst is still easily poisoned and deactivated during use, which reduces the service life of the catalyst after regeneration

Moreover, the catalyst is affected by the high-temperature flue gas flow, and its mechanical strength decreases. The regeneration process involved in the above patents does not effectively solve this problem.

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