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A method for resource utilization of domestic waste

A technology for domestic waste and recycling, applied in the field of waste treatment and recycling, can solve the problems of occupying land resources, high operating costs, small scale, etc., and achieve the effect of self-balancing of energy, small waste output, and easy drying.

Active Publication Date: 2022-04-19
尹海
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the past, it was mainly piled up randomly, but it was changed to landfill due to the impact on the environment. Landfill occupies valuable land resources, and it also needs to be transported to a centralized landfill site, so it is not a very good disposal method
In the existing technology, the on-site treatment of township garbage is mainly small incinerators, which have problems such as high investment due to small scale, difficult online monitoring, high investment and high operating costs to solve the secondary pollution of flue gas.

Method used

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  • A method for resource utilization of domestic waste
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  • A method for resource utilization of domestic waste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] In a small town with a population of 8,000, the output of domestic waste is 5.6t / d, and the transportation distance from the county is relatively long. After classified collection, there are 3 tons / d of combustible garbage 1 and 2 tons / d of kitchen waste 4. Adopt the technology of the present invention to process, adopt the pyrolysis device 2 of propulsion type, carry out continuous pyrolysis to combustible garbage 1, produce volatile matter 8 and be 188m at 550-600 ℃ 3 / h, 62.5Nm under standard condition 3 / h, the water content of kitchen waste 4 is about 80%, and the specific gravity is 0.91t / m 3 After normal operation, 38% of the pyrolytic charcoal 10 discharged from the pyrolysis device 2 is mixed with the kitchen waste 4, and then spread on the surface of the kitchen waste pile 34 in two stages.

[0069] The thickness of the kitchen waste pile layer 34 is normally stable within the range of 350-450mm. The temperature in the drying device 3 is about 60-70°C in wi...

Embodiment 2

[0073] For a township with a population of 20,000, the domestic waste output is 19t / d. After classified collection, there are 11 tons / d of combustible garbage and 7.5 tons / d of kitchen waste. The technology of the present invention is used for processing, and a screw propulsion pyrolysis device is used to continuously pyrolyze combustible garbage, and the volatile matter produced is 691m at 550-600°C 3 / h, 229.2Nm under standard condition 3 / h, the water content of combustible garbage is about 81%, and the specific gravity is 0.92t / m 3 . After normal operation, 40% of the charcoal in the pyrolysis device is mixed with kitchen waste, and then spread on the surface of the combustible waste pile in two stages. The thickness of the kitchen waste pile is normally stable within the range of 350-450mm. The temperature in the drying device is about 60-70°C in winter and about 82-95°C in summer.

[0074] The volatile matter produced by the pyrolysis device is sent to the lower part...

Embodiment 3

[0077] In a medium-sized town with a population of 50,000, the output of domestic waste is 40t / d, and the transportation distance from the county seat is relatively long. After classified collection, there are 24 tons / d of combustible garbage and 16 tons / d of kitchen waste. The technology of the present invention is used for processing, and a screw propulsion pyrolysis device is used to continuously pyrolyze combustible garbage, and the volatile matter produced is 1508m at 550-600°C 3 / h, 500Nm under standard condition 3 / h or so, the water content of kitchen waste is about 82%, and the specific gravity is 0.94t / m 3 .

[0078] After normal operation, 40% of the charcoal in the pyrolysis unit is mixed with wet garbage, and then spread on the surface of the combustible garbage pile 3 times a day. The thickness of the kitchen waste pile is normally stable within the range of 300-400mm. The temperature in the drying device is about 60-70°C in winter and about 82-95°C in summer...

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Abstract

The invention provides a method for resource utilization of domestic garbage. The method is that after the domestic garbage is divided into combustible garbage, kitchen waste and other garbage according to the existing classification method, the combustible garbage and kitchen waste which account for more than 90% of the total Garbage is treated by drying device and pyrolysis device respectively. The drying device uses the sensible heat of the volatile matter generated by the pyrolysis device, the waste heat of exhausted flue gas and solar heating; the dried product is sent to the pyrolysis device. The volatile matter produced by the pyrolysis device passes through the pile of kitchen waste in the drying device to remove tar and particulate matter, and then enters the combustion furnace after being condensed and washed to generate high-temperature flue gas to heat the pyrolysis device, and the discharged flue gas The food waste is heated by the multi-tube support of the drying device. Part of the charcoal produced by the pyrolysis device is used as biochar or building materials, and part of it is mixed with kitchen waste and sent to the drying device. The invention realizes the harmlessness and resource utilization of domestic garbage.

Description

technical field [0001] The invention belongs to the field of waste treatment and resource utilization, and in particular relates to a resource utilization method of domestic waste. Background technique [0002] Domestic waste treatment refers specifically to the solid waste generated in daily life or activities that provide services for daily life, as well as the treatment of solid waste regarded as domestic waste as stipulated by laws and regulations, including source classification, classified collection, and classified storage of domestic waste , classified transportation, classified treatment and disposal and related management activities. Source separation is to make the subsequent collection, transportation and treatment of garbage easier, and turn waste into treasure. Waste disposal follows the principles of reduction, harmlessness, and recycling, and solves problems such as low landfill and incineration recycling and environmental pollution, ensuring the realization...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09B3/40B09B5/00B09B101/70
CPCY02W30/20
Inventor 尹海
Owner 尹海
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