Alkali washing regenerating liquid for denitration catalyst and regenerating method

A technology for denitrification catalyst and regeneration solution, which is applied in the direction of catalyst regeneration/reactivation, chemical instruments and methods, physical/chemical process catalysts, etc. It can solve the problems of fresh catalyst, denitrification activity of denitrification catalyst, specific surface area and void of denitrification catalyst Volume reduction and other issues, to achieve high denitrification efficiency and good regeneration effect

Active Publication Date: 2014-12-17
TIANHE BAODING ENVIRONMENTAL ENG
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  • Summary
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AI Technical Summary

Problems solved by technology

For the denitration catalyst operating in the co-firing flue gas of coal and sludge with high phosphorus content, a large amount of P will be enriched on its surface 2 o 5 , resulting in a decrease in the specific surface area and void volume of the denitration catalyst, which has a serious impact on the denitration activity of the denitration catalyst
At present, ...

Method used

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preparation example Construction

[0075] In the present invention, the preparation method of the active replenishing liquid preferably includes the following steps:

[0076] a) Mix JFC-1 type fatty alcohol polyoxyethylene ether, TX-10 type alkylphenol polyoxyethylene ether, AEO type fatty alcohol polyoxyethylene ether with deionized water to obtain solution A;

[0077] b) mixing ammonium metavanadate, ammonium paratungstate, ammonium heptamolybdate, and acetamide with the solution A to obtain a solution B;

[0078] c) The solution B is mixed with nitric acid and aged to obtain an active replenishing solution.

[0079] The present invention mixes JFC-1 type fatty alcohol polyoxyethylene ether, TX-10 type alkylphenol polyoxyethylene ether, AEO type fatty alcohol polyoxyethylene ether with deionized water to obtain solution A. The present invention has no special limitation on the source of the JFC-1 type fatty alcohol polyoxyethylene ether, and the commercially available JFC-1 type fatty alcohol polyoxyethylene...

Embodiment 1

[0101] Add 4wt‰ of JFC-1 type fatty alcohol polyoxyethylene ether and 2wt‰ of SXS-40 type sodium xylene sulfonate into 0.3mol / L sodium hydroxide solution, stir for 5 minutes until uniform, and obtain alkali cleaning regeneration solution .

Embodiment 2

[0103] Add 3wt‰ of JFC-1 type fatty alcohol polyoxyethylene ether and 4wt‰ of SXS-40 type sodium xylene sulfonate into 0.8mol / L sodium hydroxide solution, stir for 5 minutes until uniform, and obtain alkali cleaning regeneration solution .

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Abstract

The invention provides alkali washing regenerating liquid for a denitration catalyst and a regenerating method. The alkali washing regenerating liquid comprises the following components in permillage by weight: 1 to 5wt%o of surface active agent, 1 to 5wt%o of solubilizer, and the balance of sodium hydroxide solution, wherein the solubilizer is sodium xylene sulfonate. Compared with the prior art, the alkali washing regenerating liquid shows a good effect on regenerating the denitration catalyst poisoned from phosphorus, and the regenerated denitration catalyst is high in denitration efficiency; the experiment result shows that the regenerated denitration catalyst contains not greater than 0.12% of P2O5, and the denitration efficiency is more than 90%.

Description

technical field [0001] The invention relates to the technical field of catalyst regeneration, and more specifically relates to an alkaline cleaning regeneration solution and regeneration method for denitration catalysts. Background technique [0002] my country is a country with coal as the main energy source, and nitrogen oxides emitted after coal combustion is one of the main pollutants in the atmosphere, which is extremely harmful to the environment. Therefore, my country has strictly controlled the emission of nitrogen oxides. [0003] Selective Catalytic Reduction (hereinafter referred to as SCR) denitrification technology has a remarkable effect on the removal of nitrogen oxides, and is currently the most widely used flue gas denitrification technology. In the entire SCR denitrification system, the denitrification catalyst is the core component and accounts for a relatively large proportion of equipment investment. However, the denitrification performance of the denit...

Claims

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Application Information

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IPC IPC(8): B01J38/64
Inventor 於承志闫坤鹏崔飞飞毛昂李毅王丽娜李庆丰贾彦奇张毅翟洪乐
Owner TIANHE BAODING ENVIRONMENTAL ENG
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