Medium-temperature catalytic denitration/heat accumulation integrated mullite ceramic material

Abstract

The invention discloses a medium-temperature catalytic denitration / heat accumulation integrated mullite ceramic material, belonging to the technical field of catalysis. The mullite ceramic material ismainly prepared from 35 to 40 parts of cordierite, 70 to 80 parts of mullite, 5 to 10 parts of tungsten trioxide, 5 to 8 parts of SiO2, 10 to 15 parts of montmorillonite, 2 to 3 parts of cellulose sponge, 4 to 5 parts of glass fibers, 3 to 6 parts of chlorinated polyethylene, 3 to 5 parts of a methyl methacrylate-butadiene-styrene terpolymer, 3 to 6 parts of hydroxypropylmethylcellulose, 2 to 3 parts of phthalate, 2 to 3 parts of monoethanolamine and 1 to 3 parts of stearic acid through kneading, ageing, extruding and molding, drying and calcining, impregnating with catalytic slurry, and secondary drying and calcining.

Description

technical field [0001] The invention relates to an integrated mullite ceramic material for medium-temperature catalytic denitrification and heat storage. The denitrification catalyst prepared by the invention has good mechanical strength, acid corrosion resistance and thermal shock resistance, and can be applied to coal-fired boilers and thermal power plants. In the air preheater of the unit, it replaces the original heat exchange element Corten steel in the air preheater, which has good heat exchange performance, denitrification activity and wide temperature window. Background technique [0002] In recent years, energy and its related environment have become the most concerned hotspots in countries all over the world. Due to the shortage of per capita energy resources, limited environmental capacity and fragile ecology in our country, it will greatly restrict the sustainable development of our country. Domestic GDP is growing rapidly every year, energy consumption is incre...

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Problems solved by technology

[0006] The traditional vanadium-titanium denitrification catalyst has a narrow activation temperature window (320-400°C), and is susceptible to SO 2 Poisoning, low activity at low temperature, and easy to produce ammonium sulfate, which can block the catalyst hole, air preheater and downstream equipment, cause a large pressure drop in the system, increase the electricity cost of the induced draft fan and other unfavorable factors

[0007] Moreover, the existing rare earth-based catalysts do not have heat storage function, and have poor wear resistance, narrow active temperature range, low strength, and short service life; so that the scope of application is greatly limited. Therefore, we urgently need to study a new catalyst to replace The above products

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