Process for comprehensively treating garbage

Abstract

The invention provides a process for comprehensively treating garbage. The process is suitable for garbage automatic separation and deep dehydration treatment of the garbage with the characteristics of high-humidity mixed garbage in China and comprises steps of automatic separation, smashing, dehydration and recovery. The process has the advantages that: the process of separating the garbage adopts fully-automatic mechanized operation, so that labor cost is saved and the recovery efficiency of the garbage is improved; a large amount of moisture content of the garbage is removed by the step of cone and disk type pressing dehydration which has high dehydration efficiency, clean outlet water and low energy consumption; the garbage separation and the deep dehydration adopt fully-mechanized assembly line work, so material retention phenomenon, secondary fermentation, and garbage percolate are avoided in the garbage treatment process, flies and the level of foul smell are reduced to the lowest limit, and simultaneously the caloric value of combustible matters is basically not lost in the treatment process; and the reutilization condition of sorted objects of the garbage is good, the recycling utilization rate of garbage treatment is above 90 percent, and the landfill amount of the garbage treatment is less than 10 percent.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and particularly relates to a garbage treatment process, which is a comprehensive garbage treatment process for sorting and deep dehydration of garbage with high-humidity mixed garbage characteristics suitable for China's national conditions. Background technique [0002] At present, my country's urban domestic waste is increasing at a rate of 10% every year, and the simple treatment of urban waste only accounts for 2.3% of the total. Since the per capita usable land in my country is less than 3.85% of that in the United States, the current stock of garbage in my country over the years has reached Up to 6 billion tons, occupying 500 million square meters of cultivated land, and direct economic losses amounted to 8 billion yuan. The number of cities across the country has grown to 660, and 200 of them have been surrounded by garbage. Based on an urban population of 260 million and...

AI Technical Summary

Problems solved by technology

[0004] ① Mixed and received components are complex, and the content of bags is high; general methods cannot be normally and effectively classified

[0013] 1. The sorting and sorting of garbage mainly depends on screening and manual sorting. Affected by garbage components and moisture, drum screens often block holes in actual work. If the moisture is too large, they will simply be grouped into balls, which cannot reflect its good classification effect.

[0014] 2. Manual sorting has the problems of strong randomness and low recovery efficiency, which not only increases labor costs, but also cannot guarantee the good implementation of the process

[0016] 1) The operating environment is harsh and the secondary pollution is serious: the method of draining water and fermentation and evaporation to remove water has a long cycle, a large amount of malodorous gas emissions, a large amount of landfill leachate, and high COD and BOD content in the leachate. Treatment costs are high

[0017] 2) Affected by changes in the moisture content of the garbage, the performance of the fermentation product is extremely unstable

[0018] 3) The production process is discontinuous, a large amount of organic matter is degraded into gas emissions such as CO2, and the secondary utilization value of fermentation products is low

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