Waste incineration method capable of inhibiting generation of dioxins and system thereof

Abstract

The invention discloses a waste incineration method capable of inhibiting generation of dioxins and a system thereof. The system comprises a fluid bed incinerator and an exhaust heat boil, and also comprises a first separating unit, an external heat exchanger and a retardant adding device, wherein the fluid bed incinerator, the first separating unit and the exhaust heat boil are connected in sequence; the external heat exchanger is connected between the first separating unit and the fluid bed incinerator and used for the recycle combustion of returning charge ash which is separated and returned through a returning charge inclined pipe to the hearth of the fluid bed incinerator, at the same time the heat exchange uses the heat of the returning charge ash to heat steam; and the retardant adding device is used for adding retardant from all parts of the system according to different retardant and operation condition. Through the overall optimized design of the waste incineration system, the invention can basically inhibit the generation of dioxins, effectively controls the pollution of dioxins on environment, and also can effectively recycle the heat energy generated by waste incineration.

Description

technical field [0001] The invention relates to the technical field of garbage incineration, in particular to a garbage incineration method and system for suppressing the generation of dioxin-like substances. Background technique [0002] Municipal solid waste is an accompanying product of human activities. With the increase of urban population and the improvement of urban living standards, the output of municipal solid waste is increasing day by day. The increasing amount of municipal solid waste is seriously polluting the living environment of human beings. How to realize the "three" treatment of harmless, volume reduction and resource utilization of municipal solid waste has become the focus of attention all over the world. Among the common waste disposal methods, waste incineration has become the mainstream of municipal solid waste treatment due to its advantages of complete harmlessness, deep volume reduction and possible resource utilization. [0003] However, waste...

AI Technical Summary

Problems solved by technology

Dioxins have no purpose, are difficult to degrade in the natural environment, and more importantly, are extremely toxic

[0018] 2. The mechanical grate waste incinerator system generally does not have a high-temperature separation device. Although the content of fly ash produced is less than that of fluidized bed furnaces, the carbon content in fly ash is higher

This may be somewhat different from the actual application in the incinerator, and it cannot completely cover the temperature range generated by PCDD / Fs

[0025] To sum up, in the existing waste incineration systems, there are few systematic and comprehensive optimization designs based on reducing the generation of dioxins

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