Hazardous waste disposal method for setting incineration temperature and duration according to classification

Abstract

The invention discloses a hazardous waste disposal method capable of setting incineration temperature and duration according to classification, and particularly relates to the technical field of hazardous waste disposal. The low-temperature out-phase synthesis of dioxin precursors (phenol, chlorophenol, benzene, chlorobenzene, unchlorinated dioxin and furan) at the temperature of 250-450 DEG C is reduced, the combustion temperature of flue gas in the secondary combustion chamber is kept at 1100 DEG C or above, the retention time of the flue gas in the secondary combustion chamber is longer than 2 s, the oxygen content of a flue gas outlet of the rotary kiln is 5-8%, the CO content is smaller than 50 mg / Nm < 3 >, and the combustion temperature of the flue gas in the secondary combustion chamber is kept at 100 DEG C or above. According to the method, high-temperature gas-phase synthesis of precursors (polychlorinated biphenyl, polychlorinated diphenyl ether, chlorobenzene and chlorophenol) at the temperature of 500-800 DEG C is reduced, semi-dry-method deacidification, dry-method deacidification, wet-method washing, activated carbon treatment, catalyst treatment and bag-type dust collector treatment are carried out in the subsequent flue gas treatment process, generation of dioxin can be effectively reduced, and meanwhile, the emission concentration of dioxin is controlled in the subsequent treatment process.

Description

technical field [0001] The invention relates to the technical field of hazardous waste disposal, and more specifically, the invention relates to a hazardous waste disposal method in which the incineration temperature and duration are set according to classification. Background technique [0002] Hazardous waste treatment methods include physical method, chemical method, biological method, solidification treatment, marine disposal, geological disposal, incineration treatment, landfill, etc. No matter which treatment method is used, the principle of "reduction, harmlessness, and resource utilization" must be followed. Among them, physical methods and biological methods are pretreatment of hazardous wastes. The purpose is to change the nature of hazardous wastes, such as volume reduction. , immobilization of toxic components and detoxification, etc., incineration, landfill, solidification, ocean disposal, and geological disposal are methods for the final disposal of hazardous w...

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the above-mentioned defects of the prior art, the present invention provides a hazardous waste disposal method that sets the incineration temperature and duration according to classification. The technical problem to be solved by the present invention is: in the hazardous waste incineration process, it is necessary to Physical and chemical properties such as calorific value, volatile matter, sulfur and chlorine content, ash characteristics, packaging and other physical and chemical properties of materials, rationally homogenize the shape, calorific value, and composition of materials to achieve stable, controllable and uniform incineration in the kiln The purpose of balanced combustion is to facilitate the subsequent precise control of the temperature and duration of the incineration process, but it is prone to the problem that the content of dioxins produced during the combustion process cannot be effectively controlled