Hazardous waste incineration smoke further denitrification purification system and method

Abstract

The invention relates to a hazardous waste incineration smoke further denitrification purification system. The hazardous waste incineration smoke further denitrification purification system comprisesa rotary kiln, an insulation cavity, a secondary combustion chamber, an urea solution spraying gun, a waste heat boiler system, a smoke quench tower, a deacidification tower, a dust collector, a denitrification reactor, an active carbon fixed bed, a draught fan, a tubular GGH heat exchanger, a desulphurization tower, a demist device, a chimney and a water sealing slag scraper machine for collecting ash; a first smoke inlet of the tubular GGH heat exchanger is communicated with the active carbon fixed bed, a first smoke outlet of the tubular GGH heat exchanger is communicated with a smoke inletof the desulphurization tower, a smoke outlet of the desulphurization tower is communicated with a second smoke inlet of the tubular GGH heat exchanger, and a second smoke outlet of the tubular GGH heat exchanger is communicated with the chimney. By adopting the hazardous waste incineration smoke further denitrification purification system, not only can the lost heat of the rotary kiln be effectively recovered, but also the smoke is ensured enabledto reach the emission standard; and moreover, the ultralow NOx emission can be realized, the system structure is reasonable, the technology is reliable, cleanliness and high efficiency can be realized, and the hazardous waste incineration smoke further denitrification purification system is suitable for being popularized to use in the city withdense population and in the rural garbage recycling industry.

Description

technical field [0001] The invention belongs to the environmental protection field of garbage treatment, relates to the technical field of medical hazardous waste treatment, and specifically relates to a system and method for deep denitrification and purification of flue gas from incineration of hazardous waste. Background technique [0002] Medical waste includes waste in solid, semi-solid and liquid forms. Because it contains a large number of bacteria and viruses, it is biologically toxic, infectious, harmful and corrosive. Once disposed of improperly, it is very easy to cause serious harm to the health of residents and the social environment, so it has become a key target of prevention and control in countries around the world, and has also been included in the "National List of Hazardous Wastes" by my country. Domestic and foreign medical waste treatment technologies mainly include incineration treatment, high-pressure steam disinfection, plasma treatment, microwave tre...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a more stable and reliable complete set of equipment for energy-saving utilization of hazardous waste flue gas and deep purification of NOx for the problems of low thermal efficiency of ro...

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