Wet separation technology of municipal wet waste

A garbage sorting technology, which is applied in recycling technology, solid waste removal, furniture waste recycling, etc., can solve the problems of unsatisfactory urban wet garbage sorting and treatment requirements, unsatisfactory efficiency and effect, and decreased garbage sorting efficiency, etc. problems, to achieve the effect of reducing the amount of landfill leachate, realizing resource utilization, and high recycling rate

Active Publication Date: 2014-09-24
CHINA HAISUM ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The composition of urban wet garbage is complex and diverse, and the size distribution range is large. The efficiency and effect of air separation and bounce separation alone are not ideal, and there are many operational failures and high energy consumption.
Wet garbage contains viscous organic components such as kitchen waste, vegetable leaf peels, and oils. It is sorted by drum sieving, which is easy to block the screen, resulting in a decrease in garbage sorting efficiency
Manual sorting is not only inefficient, but also the malodorous gas and toxic substances produced by wet garbage seriously endanger the health of workers
In summary, the existing sorting technology cannot meet the needs of urban wet waste sorting and treatment.

Method used

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  • Wet separation technology of municipal wet waste

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Experimental program
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Effect test

Embodiment 1

[0021] Such as figure 1 Shown is the process flow chart of a kind of wet sorting process of urban wet garbage provided by the present invention, taking the small-scale wet sorting demonstration line of daily processing 10 tons of urban wet garbage as an example:

[0022] Step 1: Urban wet garbage is continuously fed through the vibrating belt conveyor 1 to remove large pieces of heavy garbage such as bricks, concrete, etc., and the magnetic separator 2 placed above the vibrating belt conveyor 1 recycles the garbage Precious metals are selected by winnowing machine 3 to reclaim the paper in the rubbish, and then each component of rubbish is cut to 50mm long by shearing crusher 4.

[0023] Step 2: The crushed wet garbage is transported to the grease trap 5, and the flushing water with a weight 15 times that of the wet garbage is added to the grease trap 5, and the grease on the surface of the garbage liquid is scraped off by the grease trap baffle, and then the garbage liquid is...

Embodiment 2

[0030] The difference with embodiment 1 is that in the first step, each component of the rubbish is cut to 40 cm through the shear crusher 4; in the grease trap 5 of the second step, the flushing water whose weight is 20 times that of the wet rubbish is added.

[0031] The moisture content of the organic product was 9.3% and the doping rate was 3.1%. At the same time, the doping rate of the recyclable components was 4.0% and the doping rate of the inorganic components was 1.5%.

Embodiment 3

[0033] The difference with embodiment 1 is that in the first step, each component of the rubbish is cut to 45cm through the shear crusher 4; in the grease trap 5 of the second step, the flushing water whose weight is 18 times that of the wet rubbish is added.

[0034] The moisture content of the organic product was 9.2% and the doping rate was 3.5%. At the same time, the doping rate of the recyclable components was 4.3% and the doping rate of the inorganic components was 1.8%.

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Abstract

The invention discloses a wet separation technology of municipal wet waste, characterized by: successively removing heavy waste, precious metal, and paper waste from the municipal wet waste; crushing, then adding water to recover floating oil, plastic, rubber, wood, textile and the like according to density, and then removing inorganic particles; purifying to obtain an organic product with good quality; recycling waste water by carrying out biochemical treatment on waste water. According to the invention, the technology disclosed herein has high separation efficiency, follows the principle of volume reduction, innoxious disposal, and recycling, embodies the principles of energy saving and emission reduction and circular economy, and realizes the recycling of the municipal wet waste under a premise of safety and environmental protection.

Description

technical field [0001] The invention relates to a wet sorting process of urban wet garbage, belonging to the technical field of garbage sorting. Background technique [0002] Since 2011, Shanghai has implemented dry and wet classification of municipal solid waste, and major cities such as Beijing and Guangzhou have gradually adopted this classification method. Urban wet garbage mainly refers to the ingredients such as meal waste and vegetable leaves and peels in urban domestic garbage, accounting for more than 50% of domestic garbage. Compared with dry garbage, urban wet garbage has a high moisture content, high oil and salt content, and is easy to corrupt. Deterioration and other characteristics, easy to cause air, soil and other environmental pollution. At present, about 10% of recyclable components and about 10% of non-recyclable components are still mixed in urban wet garbage, of which recyclable paper accounts for 4.65%, rubber and plastic accounts for 3.57%, glass acc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09B3/00B09B5/00
CPCY02W30/78
Inventor 贺磊吴立群杨娇
Owner CHINA HAISUM ENG
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