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Method for mixed burning of agriculture and forestry waste, sludge and household garbage by using grate furnace

A technology for agricultural and forestry waste and domestic waste, applied in the field of urban domestic waste, to achieve the effects of improving stability, saving investment, and strong operability

Inactive Publication Date: 2010-06-16
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Technical problem: The technical problem to be solved by the present invention is to provide a low-cost, improve the combustion efficiency of waste incinerators, solve the pollution problem caused by sludge, resource utilization of agricultural and forestry waste, and reduce pollutants, especially heavy metals and dioxins. emissions and reduce the consumption of fossil energy, using a grate furnace mixed incineration method for processing agricultural and forestry waste, sludge and municipal solid waste

Method used

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  • Method for mixed burning of agriculture and forestry waste, sludge and household garbage by using grate furnace
  • Method for mixed burning of agriculture and forestry waste, sludge and household garbage by using grate furnace

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Embodiment 1

[0046] When the boiler is started, spread the straw evenly on the grate of the incinerator. The ignition bed material generally chooses the bulk material with a length less than 100mm, and the ignition bed material is required to be 30-40cm thick. The straw on the grate is ignited by means of burning. Turn on the primary air, and when the furnace temperature rises to 400°C, continuously add agricultural and forestry waste to the furnace through the screw feeder, adjust the primary and secondary air volumes, and when the furnace temperature rises to 850°C, add to the furnace according to a certain ratio Municipal solid waste and sludge can be co-fired. Organize the air distribution reasonably, and gradually adjust the bed temperature to 850°C to 1000°C.

Embodiment 2

[0048] Municipal solid waste has high moisture content and low calorific value. The moisture content and composition of sludge are complex, and the calorific value varies greatly. In the actual process of waste incineration, the specific blending ratio of agricultural and forestry waste should be flexibly adjusted according to the quality of waste and sludge. When the waste coal ash content is high in winter in the north, or the moisture content of the waste in the rainy season in the south is high, and the combustible components are low. The proportion of mixed combustion of agricultural and forestry waste can reach 30%-40%, so that the calorific value of the mixed fuel can be increased to more than 1200kcal / kg; when the quality of garbage and sludge is good, the calorific value is about 1000-1200kcal / kg. The proportion of mixed combustion of waste is within 10%; the combustion temperature in the incinerator is maintained in the range of 850 ° C to 950 ° C, and the residence ...

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Abstract

The invention relates to the technical field of energy environmental engineering and provides a method for mixed burning of agriculture and forestry waste, sludge and household garbage by using a grate furnace. The method comprises burning the agriculture and forestry waste, sludge and household garbage in a grate garbage burning furnace, igniting by using agriculture and forestry waste, and adding household garbage and sludge in the furnace to realize mixed burning when the temperature of the furnace rises to 850 DEG C, wherein the mass percent of the agriculture and forestry in the mixed fuel is within 40 percent, the mass percent of sludge in the mixed fuel is within 30 percent, the burning temperature of the grate burning furnace is controlled at 850 to 1000 DEG C, and the smoke gas generated by burning stayed in the furnace is controlled above two seconds. The invention is low in the cost, improves the burning efficiency of the garbage burning furnace, solves the problem of pollution caused by the sludge, ensures that the agriculture and forestry waste can be recycled, reduces discharge of pollutants, particularly heavy metal and dioxin and reduces the consumption of fossil energy.

Description

technical field [0001] The invention belongs to the technical field of energy and environment engineering, and in particular relates to a method for treating agricultural and forestry waste, sludge and urban domestic waste by using a grate furnace for mixed incineration. Background technique [0002] At present, the state vigorously advocates and encourages the development of circular economy, energy conservation, development of renewable energy, and building a conservation-oriented society. [0003] In 2008, the volume of urban domestic garbage removal and transportation in my country reached 174 million tons, and the rapid growth of urban garbage has become one of the four major environmental pollutions that our country is currently facing. The incineration method of municipal solid waste can effectively achieve harmlessness, reduction and recycling, and it is a technical route widely promoted and applied at home and abroad. However, due to the low calorific value and hig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23G5/033
Inventor 赵长遂任强强段伦博吴新陈晓平梁财
Owner SOUTHEAST UNIV
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