Dehydrating combustion treating method for living refuse

A technology of domestic waste and treatment method, applied in combustion methods, grain treatment, incinerators and other directions, can solve the problems of low calorific value, difficult incineration, high moisture content of domestic waste, achieve high waste burnout rate, improve fire conditions, The effect of high dehydration efficiency

Inactive Publication Date: 2005-07-27
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a new dehydration and incineration treatment method for domestic waste, which can improve the temperature of waste incineration, reduce the cost of flue gas treatment, and reduce environmental pollution.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The calorific value is 1000kcal / kg, and the water content in the garbage is 55%. First, the roller speed is controlled at 0.5 revolutions per minute and the crushing time is 30 minutes. The water seeping out after the crushing is drained, and the water content of the garbage is reduced to 42%, and then undergo deep dehydration at a speed of 15,000 rpm in a high-speed centrifuge. After a centrifugal time of 3 minutes, the moisture content of the garbage is reduced to 30%. The dewatered garbage is burned in a mobile fire-bed boiler to stabilize the fire while strengthening the combustion of the fire-bed and furnace space. The outlet temperature of the furnace is about 950℃, the residence time of flue gas is 2s, and the thermal ignition reduction rate of incinerator slag is 3%. The flue gas produced by combustion is discharged after deacidification by spray semi-dry method and dust removal by self-cleaning filter barrel filter. In the deacidification process, the height to dia...

Embodiment 2

[0019] The calorific value is 1000kcal / kg, and the water content in the garbage is 55%. First, the roller speed is controlled at 150 rpm to roll and crush, the crushing time is 3 minutes, and the water seeping out after crushing is drained, and the water content of the garbage is reduced to 44%, and then undergo deep dehydration at a speed of 15,000 rpm in a high-speed centrifuge. After a centrifugal time of 3 minutes, the moisture content of the garbage is reduced to 31%. The dewatered garbage is burned in a mobile fire-bed boiler to stabilize the fire while strengthening the combustion of the fire-bed and furnace space. The outlet temperature of the furnace is about 940°C, the residence time of flue gas is 2.5s, and the thermal ignition reduction rate of incinerator slag is 3%. The flue gas produced by combustion is discharged after deacidification by spray semi-dry method and dust removal by self-cleaning filter barrel filter. In the deacidification process, the height to diame...

Embodiment 3

[0021] The calorific value is 800kcal / kg, and the water content in the garbage is 60%. First, it is crushed by screw pressing. The screw speed is controlled at 3 revolutions / min. The crushing time is 30 minutes. The water seeping out after crushing is drained, and the water content of the garbage is reduced. The water content of the garbage is reduced to 32% after a high-speed centrifuge is used for deep dehydration at a speed of 6000 revolutions per minute. The centrifugal time is 60 minutes. The dehydrated garbage is burned in the chain boiler to stabilize the fire while strengthening the combustion of the fire bed and the furnace space. The furnace outlet temperature is about 920°C, the flue gas residence time is 3s, and the thermal ignition reduction rate of the incinerator slag is 4%. The flue gas produced by combustion is discharged after deacidification by spray semi-dry method and dust removal by self-cleaning filter barrel filter. In the deacidification process, the heigh...

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Abstract

This invention is a dewatering burning treatment method of household garbage. Mechanical dewatering pretreatment method is adopted to replace the heat drying pretreatment method, household garage is broken up at first then efficient deep dewatering process is carried out by high speed centrifuge after removing water by filtering, the garbage dewatered is sent into the furnace to burning, the amount of the calorific power generated is increased by burning garbage through controlling the burning temperature and residence time of flue gas, the amount of generating dioxin is reduced too. The fluw gas generated by burning will be discharged after spray damp dry acid stripping and dsting. This invention can raise the burning temperature of garbage, and reduce the cost for flue gas treatment and environment pollution.

Description

Technical field [0001] The invention relates to a dehydration and incineration treatment method of domestic garbage, which is used for the harmless treatment of municipal solid waste and other domestic garbage, and realizes urban environment optimization treatment and energy utilization, and belongs to the technical field of environmental protection and energy saving. Background technique [0002] At present, the output of municipal solid waste in my country is increasing at an annual rate of 8% to 10%. How to effectively treat municipal solid waste has attracted much attention. Incineration is the fastest and most effective technical method to achieve waste reduction. Garbage incineration must have certain conditions: Garbage must have a certain calorific value. When the calorific value of garbage is less than or equal to 3350kJ / kg (800kcal / kg), incineration needs to support combustion, including mixing coal or burning oil to support combustion. It is generally believed that whe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B02C18/00F23G5/02
CPCY02E20/12
Inventor 申哲民句丙新吴旦王文华程金平袁涛
Owner SHANGHAI JIAO TONG UNIV
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