Method and device for deep purification of dioxin and mercury produced by waste incineration
A technology for deep purification and waste, applied in chemical instruments and methods, separation methods, dispersed particle separation, etc., can solve the problems of pollution, physical health and ecological environment hazards, complex structure, etc., and achieve simple process, easy operation, and processing cost. low effect
Active Publication Date: 2018-01-02
UNIVERSITY OF CHINESE ACADEMY OF SCIENCES
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Problems solved by technology
[0003] Dioxin has 210 isomers in total according to the position and quantity of chlorine atom substitution. The structure is very complex, the physical and chemical properties are stable, and it is difficult to degrade naturally. Discharging into the atmosphere will bring great harm to human health and the ecological environment. the harm of
At present, the treatment technologies for heavy metal waste gas such as mercury, lead, and arsenic produced by waste incineration mainly include: ① bag dust removal; ② bag dust removal + activated carbon adsorption technology; ③ bag dust removal + quenching technology, etc. The above technologies can partially solve the problem of mercury pollution emissions , but it will produce secondary potential pollution, and the mercury removal efficiency is not high, only particulate mercury can be removed, and the basic removal efficiency for elemental mercury is zero
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[0010] The present invention is further illustrated below by the examples, but the present invention is not limited by the examples.
[0011] The waste is burned in the incinerator 1, and the flue gas enters the high-frequency pulse low-temperature plasma electric field reaction chamber 4 through the flue 2 between the incinerator and the reaction chamber, and reacts with the high-energy electrons and free radicals generated by the electric field, and at the same time, the elemental mercury is strong oxidation to Hg 2+ , the output voltage of the high-frequency pulse low-temperature plasma electric field power supply 3 is 10-35 kV, the pulse current is 8-160 A, the pulse frequency is 200-1000 times / s, and the rising edge is below 50-100 ns; the reaction chamber is set to cycle The water pipe 7 keeps a constant temperature for the reaction chamber; the flue gas from the reaction chamber enters the condenser 6 through the flue 5 between the reaction chamber and the condenser 6, ...
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The present invention provides a method and device for deep purification of dioxin and mercury produced by waste incineration. The electric field generates high-energy electrons and free radicals to react, and at the same time strongly oxidizes elemental mercury into Hg2+; the waste gas from the electric field enters the condensing device, and adds additives that can react with Hg2+ to form a salt to form mercury compounds in a stable state Precipitation and exhaust gas. The beneficial effects of the present invention are as follows: the dioxin removal rate is over 95%, and the mercury removal rate is over 98%; the method has the advantages of simple process, easy operation, 1 / 3 lower treatment cost than the traditional one, and no secondary pollution Etc.
Description
technical field [0001] The invention relates to the field of atmospheric environmental protection, in particular to a method and a device for treating pollutants such as dioxin and mercury produced by waste incineration. technical background [0002] Incineration disposal is an important technical choice to realize the disposal of medical waste, domestic garbage and other wastes, but if the incineration disposal process is improper, it is easy to cause secondary pollution and produce secondary pollutants such as dioxin and mercury that exceed the standard discharge. Therefore, how to realize the deep purification of pollutants such as dioxin and mercury, especially the collaborative deep purification is very important. [0003] Dioxin has 210 isomers in total according to the position and quantity of chlorine atom substitution. The structure is very complex, the physical and chemical properties are stable, and it is difficult to degrade naturally. Discharging into the atmosp...
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IPC IPC(8): B01D53/32B01D53/81B01D53/72B01D53/64
Inventor 陈扬冯钦忠张正洁
Owner UNIVERSITY OF CHINESE ACADEMY OF SCIENCES