Semiconductor control rectifier (SCR) denitration catalytic agent applicable to high ash-laden gas condition and preparation method thereof

Abstract

The invention relates to a semiconductor control rectifier (SCR) denitration catalytic agent applicable to a high ash-laden gas condition and a preparation method thereof and belongs to the technical field of catalysis. A surface active agent, a sizing agent, a lubricating agent and the like are added when a vanadium tungsten titanium system denitration catalytic agent is prepared, a secondary micro structure and reasonable pore diameter distribution are formed through secondary drying and burning, and the SCR denitration catalytic agent applicable to the high ash-laden gas condition is prepared. The bore diameter of prepared denitration catalytic agent is no less than 6.4mm, extrusion pressure at extrusion molding is small, surface is smooth, frictional factor is small, adherence of dust on the surface of the catalytic agent is difficult, clogging and poisoning risks of the honeycomb-type catalytic agent under the high ash-laden gas condition are reduced, added metallic oxide further improves anti-poisoning capability of the catalytic agent, adaptability of the denitration catalytic agent under the high ash-laden gas condition is improved, and the denitration catalyst technology breaks through under the high ash-laden gas condition.

Description

technical field [0001] The invention relates to an SCR denitration catalyst suitable for high dust-containing flue gas conditions and a preparation method thereof. The honeycomb type denitration catalyst prepared by using the method has a flue gas dust content as high as 30-55 g / Nm 3 It still has good nitrogen oxide removal rate and anti-ash blocking and anti-poisoning performance, and belongs to the technical field of catalysis. Background technique [0002] With the increasingly strict control of nitrogen oxide emissions during the "Twelfth Five-Year Plan" period, simple low-nitrogen combustion technology can no longer meet the requirements of current emission standards. Selective catalytic reduction (SCR) technology is due to its efficient and reliable denitrification. The performance has begun to be applied in domestic coal-fired power plants. The main principle of SCR is based on NH 3 As a reducing agent, under the action of the denitration catalyst, the NO x revert ...

AI Technical Summary

Problems solved by technology

Although the catalyst has high activity and anti-sulfur and water resistance in this position, the flue gas environment conditions are relatively harsh, such as high dust concentration, high concentration of heavy metals adsorbed by dust, etc., making the catalyst easy to wear and tear. Under the condition of clogging and easy poisoning, the catalyst needs frequent daily maintenance (such as soot blowing cleaning), which greatly shortens the service life and increases the operating cost

The catalyst edge hardening solution invented by Jiangsu Longyuan Catalyst Co., Ltd. has solved the problem of easy wear of the catalyst under the condition of high dust content flue gas (Patent No. CN101474581). The existing situation of easy clogging and easy poisoning, the present invention studies a preparation method of SCR denitrification catalyst suitable for high dusty flue gas conditions, which is of great significance