Life refuse treating process

A domestic garbage and treatment process technology, applied in the field of solid waste treatment, can solve problems such as high labor intensity, high operating cost, and secondary pollution of the environment, and achieve the effects of reducing labor intensity, avoiding secondary pollution, and low operating cost

Inactive Publication Date: 2005-02-23
LUZHOU ENVIRONMENTAL PROTECTION SCI & TECH XINCHANG COUNTY
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Problems solved by technology

This garbage treatment process has the following disadvantages: 1) sorting adopts manual roughing and magnetic separation, which is labor-intensive and there are more bacteria in the garbage, which has a certain impact on the health of operators; 2) the sorting effect is poor, Sorting only removes scrap metal and waste batteries, as well as hard objects, sundries and foam plastics with a diameter or length greater than 50mm, while hard objects, sundries and foam plastics with a diameter or length less than 50mm cannot be separated from organic matter. During the pyrolysis process, a relatively large amount of organic matter will be wrapped by the reduced waste plastic (diameter or length less than 50mm), which is not conducive to re-screening, and the utilization rate of organic matter is low; 3) The pyrolysis process needs to treat organic matter, inorganic matter and

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Embodiment Construction

[0011] As shown in the figure, municipal domestic waste is crushed with a crusher, and then enters a sorter for specific gravity air separation and magnetic separation, and is divided into three categories: inorganic matter (mainly fine sand, gravel, etc.), organic waste, and waste plastic. Inorganic substances are sent to the building material system, and curing agents are added to make building materials; waste plastics are sent to the waste plastic treatment system; organic waste is sent to the hydrolysis tank for self-hydrolysis reaction, and the hydrolysis and dehydration are carried out at the same time by circulating steam, which is controlled at The reaction was carried out for 3.3 hours at a pressure of 8 to 10 MPa and a temperature of 150 to 200°C. Continue dehydration after hydrolysis until the water content is less than 20%. After the dehydration is completed, it is sprayed and dried, and then subdivided and sieved to obtain inorganic matter, organic matter and was...

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Abstract

A process for treating life garbage includes such steps as breaking, sorting them by wind separation and magnetic separating to obtain inorganic substance, organic garbage and waste plastics, using inorganic substance to prepare building material, treating the waste plastics by the plastics-treating system, hydrolyzing and dewatering the organic garbage and then spray drying, and further sorting to obtain inorganic substance used to prepare building material, organic substance used to prepare fertilizer and waste plastics treated by said plastic treating system.

Description

technical field [0001] The invention belongs to the field of solid waste treatment, in particular to a process for treating urban domestic garbage, which is suitable for treating mixed domestic garbage not collected according to classification. Background technique [0002] With the increasing awareness of global environmental protection, my country's municipal solid waste treatment has gone through a development process from bare garbage→simple landfill→simple composting→high temperature composting→sanitary landfill and incineration→recycling treatment. The municipal solid waste in our country is different from developed countries. The output and density of domestic solid waste are high, there are not many combustible materials such as paper, and the water content is as high as 40-60%. The municipal solid waste is not classified and collected as mixed waste. Foreign waste treatment technologies and equipment are not suitable for treating China's municipal solid waste becaus...

Claims

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Application Information

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IPC IPC(8): B09B3/00
Inventor 袁静波
Owner LUZHOU ENVIRONMENTAL PROTECTION SCI & TECH XINCHANG COUNTY
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