Garbage burning processing method and device capable of accomplishing dioxin and dust zero discharge

Abstract

A garbage incineration treatment method and device capable of realizing zero discharge of dioxins and dust, without pretreatment of urban garbage, can be directly sent into a sealed and heat-insulated garbage storage bin, and the smoke generated by incineration of garbage can be used to treat it Heating, fermentation, and dehydration treatment, while the waste also filters the tail gas to filter out harmful substances such as dioxins, dust, and heavy metals, and discharges them together with the waste water; the dehydrated waste is sent to the incinerator for combustion, and the waste generated by fermentation A large amount of combustible gas and most of the flue gas are sent to the secondary combustion chamber together with the secondary air for combustion, and the residual dioxins, dust, heavy metals and other harmful substances in a small amount of gas are regenerated by straw ash, lime powder and dust collectors. After the purification treatment, it is discharged from the purification gas port. The whole treatment process circulates in the system repeatedly. The process steps are simple, the equipment investment is small, the floor space is small, the equipment and operation costs are low, and basically realizes zero discharge of dioxin and dust and detoxification. CO2 emission reduction.

Description

technical field [0001] The utility model belongs to the field of environmental protection, in particular to a comprehensive treatment system for garbage incineration and garbage pretreatment. Background technique [0002] At present, municipal solid waste is treated by incineration, which generally requires various pretreatment processes such as sorting, screening, crushing, and dehydration before incineration. The investment cost of equipment is high and the floor area is large; The resulting flue gas contains a large amount of CO 2 , SO 2 , NO X And harmful substances such as dioxins, heavy metals, dust, etc., the conventional method of purifying flue gas is to use electrostatic precipitator or cyclone dust collector or wet dust collector or dry dust collector or several kinds of dust collectors to carry out organic cooperation. Finally, it is discharged into the atmosphere through the chimney. None of these methods can meet the requirements for the purification of muni...

AI Technical Summary

Problems solved by technology

[0002] At present, municipal solid waste is treated by incineration, which generally requires various pretreatment processes such as sorting, screening, crushing, and dehydration before incineration. The investment cost of equipment is high and the floor area is large; The resulting flue gas contains a large amount of CO 2 , SO 2 , NO X And harmful substances such as dioxins, heavy metals, dust, etc., the conventional method of purifying flue gas is to use electrostatic precipitator or cyclone dust collector or wet dust collector or dry dust collector or several kinds of dust collectors to carry out organic cooperation. Finally, it is discharged into the atmosphere through the chimney. None of these methods can meet the requirements for the purification of municipal waste incineration tail gas. Separated, sent to the combustion chamber to reduce the discharge of dioxins, such as: Chinese patent publication number is CN1246597A, the publication date is March 8, 2000, and the title of the invention is "Dioxin treatment method in garbage incineration waste gas" ; The application discloses that in the flue gas produced by garbage incineration, the dust is first removed through a wet dust collector, and then activated carbon powder is sprayed into it, and then the activated carbon powder adsorbed with dioxin is separated from the flue gas and sent to the combustion chamber. chamber combustion

Although this method can reduce the outward discharge of harmful substances such as dioxins, the disadvantages of this method are: a. Before the garbage enters the garbage storage bin, the garbage needs to be pretreated, and the equipment investment cost is high and the floor area is large; b. The flue gas purification equipment used is also relatively large and relatively large, and the harmful substances such as dioxins and dust in the flue gas cannot be completely removed, and it is still necessary to build a taller chimney to discharge outward; c. The cost of using activated carbon powder to adsorb dioxins is high, which increases the operating cost

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