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Hardening liquid used for strengthening top of low temperature SCR denitration catalyst module and application thereof

A technology of denitrification catalyst and hardening solution, which is applied in the direction of catalyst activation/preparation, catalyst protection, physical/chemical process catalyst, etc. It can solve the problems of catalyst softening and damage, especially obvious catalyst damage, and restrict the service life of catalyst, so as to resist wear and corrosion , The effect of prolonging the life of the catalyst

Active Publication Date: 2014-09-17
ZHEJIANG TIANLAN ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The impact of dust in this environment is relatively small, but moisture precipitates at low temperature and adheres to the surface of the catalyst, which will cause softening and damage of the catalyst, especially the top of the catalyst. Accompanied by the high-speed erosion of the flue gas, the damage of the top of the catalyst is particularly obvious, which greatly Restricts the service life of the catalyst
Therefore, strengthening the tip of the low-temperature SCR catalyst and increasing the deliquescence resistance are an important part of improving the service life of the catalyst. However, waterproof measures for the tip of the low-temperature SCR catalyst have not yet been reported.

Method used

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  • Hardening liquid used for strengthening top of low temperature SCR denitration catalyst module and application thereof
  • Hardening liquid used for strengthening top of low temperature SCR denitration catalyst module and application thereof
  • Hardening liquid used for strengthening top of low temperature SCR denitration catalyst module and application thereof

Examples

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Effect test

Embodiment 1

[0026] Prepare potassium methyl silicate, PEO, and CMC three kinds of standby solutions respectively: (1) Weigh 44.0g potassium methyl silicate (solid content is 36-44%, silicone content is 18-22%, purchased from Xinyu City Xingtai Organic Silicon Co., Ltd., the following examples are the same as the methyl silicate used in the comparative example) and 100g deionized water, add in the container and stir; (2) take by weighing 30.0g polyoxyethylene (relatively Molecular mass is 3,000,000 ~ 4,000,000, purchased from Wuxi Hengzhongyuan Chemical Trade Co., Ltd., the polyoxyethylene used in the following examples and comparative examples is the same), with ultrasonic pulverization, slowly added to 400g of deionized water, let stand for one day; (3) Weigh 10.8g of sodium carboxymethylcellulose and 400g of deionized water, stir well and let stand for one day. Take the above three standby liquids, mix them uniformly under the action of a mechanical stirrer, let stand for 2 hours, and t...

Embodiment 2

[0028] Prepare potassium methyl silicate, PEO, and CMC three kinds of spare solutions respectively: (1) weigh 44.0g potassium methyl silicate and 100g deionized water, add them into the container and stir evenly; (2) weigh 4.5g polyoxygen Ethylene is ultrasonically crushed, slowly added to 400g deionized water under the action of a mechanical stirrer, and left to stand for one day; (3) Weigh 10.8g of sodium carboxymethylcellulose and 400g of deionized water, stir evenly and let stand for one day . Take the above three standby liquids, mix them uniformly under the action of a mechanical stirrer, let stand for 2 hours, and the obtained transparent liquid is the hardening liquid of the present invention.

Embodiment 3

[0030] Prepare potassium methyl silicate, PEO, and CMC three kinds of spare solutions respectively: (1) weigh 44.0g potassium methyl silicate and 100g deionized water, add them into the container and stir evenly; (2) weigh 18.0g polyoxygen Ethylene was ultrasonically crushed, slowly added to 400g of deionized water under the action of a mechanical stirrer, and left to stand for a day; (3) Weighed 10.8g of sodium carboxymethylcellulose and 400g of deionized water, stirred evenly and stood for 2 hours . Take the above three standby liquids, mix them uniformly under the action of a mechanical stirrer, let stand for a day, and the transparent liquid obtained is the hardening liquid of the present invention.

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Abstract

The invention discloses a hardening liquid used for strengthening the top of a low temperature SCR denitration catalyst module and application thereof. The hardening liquid is prepared from the following raw materials by weight: 100 parts of water, 0.1 to 8 parts of a hardener, 0.1 to 10 parts of a waterproof agent and 0.1 to 4 parts of a stabilizing agent. After calcinations and saw cutting of a low temperature SCR denitration catalyst, the top of the catalyst is dipped in the hardening liquid and then taken out, unneeded liquid on the top is removed by using compressed air, and finally, the top is subjected to natural air drying. The hardening liquid provided by the invention enables a permanent water-proof film to be formed on the top of the catalyst, so the catalyst is prevented from easy deliquescence and falling off, can effectively resist abrasion and corrosion and has a prolonged service life.

Description

technical field [0001] The invention relates to the technical field of preparation of SCR denitration catalysts, in particular to a hardening solution for strengthening the top of a low-temperature SCR denitration catalyst module and its application. Background technique [0002] Selective catalytic reduction technology (SCR) is the most widely used and most efficient technology for removing NOx in cement plant kilns, coal-fired boilers in power plants, and waste incinerators. Among them, the denitrification catalyst is a key part of the implementation of this technology, and it is generally made of titanium dioxide as a carrier and added with active substances. Titanium dioxide is a barren raw material with weak cohesiveness. The catalyst made of titanium dioxide is easy to cause wear and dust under the action of dust in the flue, especially the top wear is the most prominent, which will cause the catalyst to break down. Damage and fracture, which in turn cause blockage of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J33/00B01J37/02
Inventor 莫建松王岳军王瑞洋刘伟虞廷兴陈美秀刘学炎
Owner ZHEJIANG TIANLAN ENVIRONMENTAL PROTECTION TECH