Method and system for dry rotary kiln drying and incineration of urban domestic waste

Abstract

The invention provides a method and system for drying and incinerating urban household garbage through a dry-process rotary kiln. The method comprises the following steps: feeding wet garbage into a C5 blanking pipe, fast drying and alkalizing the garbage by utilizing high-temperature powder in the C5 blanking pipe, enabling the dry and easily-combustible garbage to enter in a kiln tail smoke chamber along with the powder, so as to be fast gasified and combusted, pumping high-temperature steam and combustion waste gas generated due to combustion through a bypass flue, mixing cold wind through a bypass fan so as to be mixed and regulate the temperature, and collecting dust through a dust collector, wherein the residual heat of dust-removed waste gas is used for power generation of a cement kiln waste heat power generation system, or productive drying, or can be discharged after dust is finely collected; calcining untimely burnout garbage and burnout slag into clinker in the rotary kiln along with raw materials; and enabling untimely burnout hydrocarbon compounds to ascend into a decomposing furnace for continuously burning. The invention further comprises the system for drying and incinerating urban household garbage through a dry-process rotary kiln. According to the method and system, the problems that the urban household garbage causes the influence on a kiln condition and the increase of coal consumption can be solved, and the sticking and plugging of a kiln system caused by the water in the garbage and chlor-alkali can be effectively eliminated.

Description

technical field [0001] The invention relates to drying and incineration treatment of domestic garbage in cities and towns, in particular to a method and system for drying and incinerating domestic garbage in a dry rotary kiln. Background technique [0002] At present, the drying and incineration of domestic waste in cities and towns is widely used at home and abroad. Professional drying furnaces or beds and professional waste incinerators require large investment, high energy consumption in operation, and harmless treatment is actually very difficult, especially in domestic low calorific value waste incineration. Furnace generally needs to add coal or inject oil to support combustion. [0003] In terms of dry rotary kiln co-processing of domestic waste, domestic powerful cement group enterprises such as BBMG, Conch, Huaxin, China Resources, and Taiwan Cement have introduced or learned from Denmark, Sweden, Germany, Japan and other foreign technical experience. After years o...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method and system for drying and incinerating urban domestic waste in a dry rotary kiln in view of the deficiencies in the prior art. This method can solve the impact of urban domestic waste on kiln conditions and the increase in coal consumption It can effectively eliminate the sticking problem caused by water in the garbage and chlor-alkali to the kiln system, and can completely eliminate the discharge of waste residue, waste gas, waste water and toxic and harmful substances, and is suitable for treating domestic garbage of different scales and characteristics in cities, counties and towns, with small investment , good economy

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