Method and device for combined denitrification of flue gas in hazardous waste incineration system
A flue gas and denitrification technology, applied in separation methods, chemical instruments and methods, gas treatment, etc., can solve problems such as difficulty in meeting nitrogen oxide emission standards, reduce the actual processing capacity of the incineration system, and reduce the service life of equipment, etc., to achieve The effect of reducing denitrification operating costs, small changes, and reducing the amount of injection
Active Publication Date: 2022-07-08
CHONGQING CISDI THERMAL & ENVIRONMENTAL ENG CO LTD
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Problems solved by technology
At present, the discharge of pollutants in new projects of hazardous waste incineration generally adopts GB18484 "Pollution Control Standards for Hazardous Waste Incineration" or the European Union 2000 (EU2000 / 76 / EC) standard, and the process for flue gas denitrification either does not have or only uses selective non-catalysis Reduction technology (SNCR), the denitrification efficiency is not high, and it is difficult to meet the nitrogen oxide emission standards specified in the design
Since the single SNCR process only uses ammonia water or urea spray in the waste heat boiler, the utilization rate of the reducing agent is low and the operating cost is high. At the same time, the unreacted ammonia gas will escape and cause corrosion of subsequent equipment, reducing the service life of the equipment and reducing incineration. The actual processing capacity of the system
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[0027] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
[0028] figure 1 It is a schematic structural diagram of the flue gas combined denitrification device of the hazardous waste incineration system of the present invention, figure 2 A schematic diagram of the layout of the secondary combustion chamber reburning fuel lance, such as figure 1 and figure 2 As shown, the device adopts a combined process method of organic liquid waste, light diesel reburning denitration and selective non-catalytic reduction denitration (SNCR). The device mainly includes: rotary kiln 4, secondary combustion chamber 9, waste heat boiler 17, quench tower 18, bag filter 19, wet deacidification tower 20, induced draft fan 21 and chimney 22. The secondary combustion chamber 9 is mainly used for the reburning and denitrification of organic liquid waste and light diesel oil and the SNCR denitration of some ammonia wate...
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The invention relates to a combined denitration method and device for flue gas of a hazardous waste incineration system, and belongs to the technical field of flue gas denitration of an industrial hazardous waste incineration system. The method and device utilize the organic liquid waste to be treated and the secondary fuel gas diesel as reburning fuel, and combine the respective characteristics of reburning denitrification and selective non-catalytic reduction (SNCR) to reduce NO in flue gas. X Staged reduction and removal can greatly improve the denitrification efficiency and reduce the NO in flue gas. X It can meet the emission standards, improve the utilization rate of the reducing agent, reduce the spray amount of ammonia water, and reduce the production and operation cost. The method and device can effectively reduce NO in flue gas X It has a broad market promotion and use value.
Description
technical field [0001] The invention belongs to the technical field of environmental protection, in particular to the field of flue gas denitrification of an industrial hazardous waste incineration system, and relates to a combined denitration method and device for flue gas of a hazardous waste incineration system. Background technique [0002] In recent years, the demand for hazardous waste incineration and disposal in my country has been increasing. According to the 2014 National Environmental Statistics Bulletin of the Ministry of Environmental Protection, by the end of 2013, the existing domestic hazardous waste incineration and disposal capacity was about 1.5 million tons, and the actual demand was close to 10 million tons. huge. At present, the pollutant emission of new hazardous waste incineration projects generally adopts GB18484 "Pollution Control Standard for Hazardous Waste Incineration" or the EU 2000 (EU2000 / 76 / EC) standard. Among them, the flue gas denitrificati...
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IPC IPC(8): B01D53/78B01D53/56
CPCB01D53/56B01D53/78B01D2258/0283B01D2251/2062
Inventor 郎明松徐志鹏
Owner CHONGQING CISDI THERMAL & ENVIRONMENTAL ENG CO LTD