Active molecule coupled cloth bag catalytic filtration process for incineration flue gas near-zero emission

Abstract

The invention discloses an active molecule coupled cloth bag catalytic filtration process for incineration flue gas near-zero emission. According to the process, after flue gas from a waste incineration power generation boiler is subjected to semi-dry deacidification through the original process, and passes through a traditional cloth bag dust removing device, the flue gas is completely mixed withactive molecules, and other free particles are generated; the obtained gas enters a catalytic filtering cloth bag, and under the action of a filtering catalyst on the surface of the cloth bag, NO, dioxin and other pollutants are subjected to strong catalytic oxidation into soluble or easily absorbed and removed molecules; the obtained gas enters an efficient washing tower, and the soluble or easily absorbed and removed molecules are effectively absorbed and removed; and finally the obtained material enters a wet electrostatic precipitator, and fine particles and fog droplets are further removed so as achieve the near-zero emission of acidic substances, dioxin, dust particles and fog droplets in the flue gas. According to the present invention, the process is designed for waste incineration flue gas, has advantages of simple process and low reforming cost based on the reforming of the original process, can effectively remove acidic pollutants such as NOx, SO2 and the like, can highly remove dioxin, and further has other advantages.

Description

technical field [0001] The invention belongs to the technical field of boiler flue gas treatment, and in particular relates to an active molecule coupling bag catalytic filtration process for near-zero emission of incineration flue gas. Background technique [0002] The problem of urban garbage has become one of the most serious public hazards in the world today. Timely cleaning and disposal of garbage is an indispensable condition for building a beautiful China and a beautiful, clean and civilized modern city. At present, the most effective way to solve the garbage problem is to reduce, recycle, and harmless. Since the 1960s, waste incineration technology has developed on a large scale in developed countries along with the slogan of resource recycling, and has found a scientific solution to the rapid growth of municipal solid waste, which is also in line with harmlessness, reduction, and resource utilization. standardized waste disposal policy. [0003] However, due to th...

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Problems solved by technology

This process mainly has the following defects: 1) In order to reduce the dioxin content in the waste incineration flue gas to the EU standard, a large amount of powdered activated carbon must be consumed, usually 15-20kg / h, and the annual operating cost is about 1.5 million yuan. Heavy burden; 2) The dioxin removal rate is limited, the lowest can be reduced to 0.05-0.06ng / m3, and the amount of powdered activated carbon needs to be doubled; 3) The adsorption efficiency of acidic substances is low, and the near-zero emission cannot be achieved The goal

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