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Method for screening heavy metals in garbage

A heavy metal and garbage technology, applied in chemical instruments and methods, solid separation, wet separation, etc., can solve the problems of complex components, no heavy metal treatment means, and unpacked domestic garbage, so as to increase the content of organic matter and eliminate heavy metal pollution Effect

Inactive Publication Date: 2008-01-09
TIANJIN HANGU DISTRICT FUXIANG FERTILIZER PROCESSING FACTORY
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  • Summary
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Problems solved by technology

Household waste is not packaged, has complex components, and contains a large amount of heavy metal components. There is no treatment method for heavy metals, resulting in excessive heavy metal content in fertilizer products. Long-term large-scale use will cause serious pollution to crops and land.

Method used

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Examples

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Embodiment

[0006] Embodiment: A method for screening heavy metals in garbage. After domestic garbage is fermented and decomposed, it is shoveled out from the fermentation bin with a forklift, unloaded into a uniform feeding hopper, converted into uniform and continuous materials, and sent to the water separation mixing tank through a belt conveyor , so that the garbage and water are fully mixed and then flow into the vibrating sieve for screening and spraying water to rinse; the oversize is sent to the waste room through a slow belt conveyor, a small amount of fiber is manually sorted out, and the undersize flows into the water pan along the water and enters Fine grid sieve, the slurry of the underscreen material flows into the intermediate slurry tank, and then is pumped into the swirl tower by the mud pump to form a swirl flow, part of the heavy material enters the sedimentation tank, and other slurry enters the slurry tank; fine grid The sieve on the sieve is sent to the wet tube mill ...

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PUM

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Abstract

The process of sieving garbage to eliminate heavy metal includes the following steps: continuous feeding fermented and decayed domestic refuse from one fermenting bin with one belt conveyer, mixing refuse with water and sieving in a vibrating sieve while spraying water to flush; conveying the oversize with one slow belt conveyer to a waste room and sorting out some fibrous waste; flowing the undersize together with water to a depositing pan and sieving in a small mesh sieve, pumping the slurry of the undersize to a eddy flow tower for separating heavy matter to the settling tank and other slurry to the slurry tank; milling the oversize from the small mesh sieve in a wet tube mill and feeding the milled matter to the slurry tank; pumping the slurry into one intermediate tank and dewatering in a belt filter. The present invention has the advantages of reduced heavy metal pollution and raised organic matter content in the refuse compost.

Description

technical field [0001] The invention relates to a method for screening heavy metals in garbage. Background technique [0002] At present, the treatment direction of domestic waste is to process domestic waste into fertilizer and utilize the rich organic matter in domestic waste. After composting domestic waste, it is widely used in agriculture. Household waste is not packaged, has complex components, and contains a large amount of heavy metal components. There is no treatment method for heavy metals, resulting in excessive heavy metal content in fertilizer products. Long-term large-scale use will cause serious pollution to crops and land. Contents of the invention [0003] The purpose of the present invention is to overcome the above-mentioned deficiencies and provide a method for screening heavy metals in garbage. [0004] The technical solution of the present invention is: a method for screening heavy metals in garbage, which is characterized in that: after the domesti...

Claims

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Application Information

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IPC IPC(8): B03B7/00C05F9/00
CPCY02A40/20
Inventor 杜云福
Owner TIANJIN HANGU DISTRICT FUXIANG FERTILIZER PROCESSING FACTORY
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