Denitrification catalyst regeneration liquid, preparation method of regeneration liquid, and catalyst regeneration method

Abstract

The invention discloses a denitration catalyst regeneration solution and a preparation method thereof as well as a catalyst regeneration method. The denitration catalyst regeneration solution comprises the following raw material ingredients in parts by weight: 4-6 parts of vanadyl oxalate, 0.08-0.10 part of cerium nitrate, 0.11-0.13 part of lanthanum nitrate, 0.05-0.07 part of copper nitrate, 0.4-0.6 part of silica sol ST-O and 95 parts of deionized water. The catalyst regeneration method comprises the following steps of firstly, evenly mixing vanadyl oxalate and the deionized water; then, feeding cerium nitrate, lanthanum nitrate and copper nitrate into mixed solution, and fully stirring until the mixture is completely dissolved; finally, feeding silica sol ST-O, and continuing to stir until homogeneous phase is obtained; and sequentially carrying out strong scavenging and ultrasonic cleaning on an inactivated denitration catalyst module, soaking the module in cleaning solution for 18-25 minutes, continuing soaking the module in the regeneration solution for 25-40 minutes, taking out the denitration catalyst module and drying. After the denitration catalyst regeneration solution and the catalyst regeneration method are adopted, the activity of the inactivated denitration catalyst can be efficiently recovered, and the temperature range of the catalyst activity is widened.

Description

technical field [0001] The invention relates to a denitrification catalyst regeneration solution, and also relates to a preparation method of the denitration catalyst regeneration solution and a regeneration method of the denitration catalyst. Background technique [0002] Nitrogen oxides are one of the main pollutants in the atmosphere and one of the important sources of a series of environmental problems such as photochemical smog pollution, urban haze weather, and atmospheric acid deposition. Since nitrogen oxides can be transported for long distances in the atmosphere, the regional and even global pollution problems caused by them have become increasingly prominent. Selective Catalytic Reduction (Selective Catalytic Reduction, SCR) is a method of eliminating nitrogen oxide pollution under the action of a specific catalyst, specifically using ammonia or other reducing agents to selectively reduce nitrogen oxides NOx to N2 and H2O. [0003] Due to the high efficiency and ...

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Problems solved by technology

[0004] SCR denitrification catalysts are consumables. The chemical life is usually three years, and the mechanical life is usually about six years. Expensive catalyst replacement costs are a major problem faced by SCR systems at home and abroad.