Method and processing system for comprehensively recycling municipal solid wastes

Abstract

The invention relates to a method for comprehensively recycling municipal solid wastes, which comprises the following steps of: (1) breaking bags of municipal solid wastes, and then, sorting the wastes manually and sorting the wastes by a magnetic separator on a transmission belt; (2) crushing the sorted residual wastes through disk crushers at intervals of 2 inches; (3) transmitting the processed wastes into a drum-type blast sieving machine for separating; (4) crushing the processed wastes containing more than 98.5% of organic substances through disk crushers at intervals of 0.25 inch, transmitting the wastes into a high-temperature and high-pressure hydrolyzer for hydrolyzing, reducing the pressure, and then, crushing and spraying the wastes out; and (5) continuously transmitting the wastes to a sieving machine of 0.25 inch for sieving, wherein substances on the sieve are residual plastic substances, and substances below the sieve are pure organic substances. The method and the system for processing wastes, which are provided by the invention, can be used for realizing industrialization, are suitable for processing wastes in a scale of 100-300 tons per day, and have the advantages of low energy consumption and low water consumption.

Description

technical field [0001] The invention relates to a garbage treatment method, in particular to a comprehensive resource treatment method and a treatment system for municipal domestic garbage. Background technique [0002] Now there are very serious groundwater pollution and garbage pollution in the city. The major polluters of groundwater are industrial and agricultural wastewater, gas stations, and urban landfills. For example: Beijing produces about 5 million tons of garbage annually, ranking first in China. There are more than 4,000 new and old waste landfills scattered in the suburbs of Beijing with an area of ​​more than 50 square meters, forming a situation of "garbage surrounding the city". The mixed landfill garbage contains a large amount of highly toxic, poisonous substances and various harmful components. Significant leakage has been reported in several large landfills in Beijing. Some of them have caused the groundwater in the range of more than ten square kilo...

AI Technical Summary

Problems solved by technology

The above figures show that the total recycling rate of waste in China is less than 10%.

However, in the current garbage disposal method, landfill occupies a large amount of land resources, there are secondary pollution, odor, mosquitoes and other pollution, leachate treatment is difficult, and the cost is high. What is especially important is that a large amount of available resources cannot be recycled. is a waste

Incineration treatment is difficult to be widely used due to large investment, high operating costs and secondary pollution, and does not meet the requirements of circular economy for sustainable development

The composting production process occupies a large area, the production cycle is long, and industrial production is difficult. During the process of microbial fermentation, a large amount of organic nutrients are converted into heat energy and discharged as CO 2 Mainly, accompanied by H 2 、CH 3 SH, CH 4 、H 2 S. NO X , SO 2 , NH 3 and other gases, in addition, composting cannot remove heavy metals, harmful impurities, harmful biotoxins and harmful microorganisms

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