Technological method of comprehensive utilization of separation and pyrolysis treatment of garbage

Abstract

The invention relates to a technological method of comprehensive utilization of separation and pyrolysis treatment of garbage, which solves the problem of comprehensive utilization of separation pretreatment and pyrolysis gas in the process of separation treatment of garbage. The method comprises the following steps: separating and crushing the garbage for secondary classification; classifying the available components in the garbage into three classes, wherein the first class comprises paper, plastic and the like which are used as pyrolysis raw materials 1, the second class comprises the mixture of soil, kitchen wastes and the like, and the third class comprises the mixture of rag, fresh branches, vines and the like; chopping the mixture of the third class, and mixing the chopped mixture of the third class with the mixture of the second class; treating the mixture of the second class and the mixture of the third class by aerobic fermentation, and using penetrant for direct back-spraying and evaporation in high-temperature regions; treating the obtained product by secondary sieving to obtain pyrolysis raw materials 2; mixing and drying the pyrolysis raw materials 1 and the pyrolysis raw materials 2; condensing the generated steam to obtain hot water which back flows into a waste heat boiler of a power generating system to be used as supplemental water; commercializing and recovering the pyrolysis raw materials; and burning the obtained combustible gas for power generation. The invention has the advantages of high recovery rate, low energy consumption and no pollution caused by discharge.

Description

Background technique [0001] The status quo of municipal solid waste treatment. Among the traditional waste treatment methods, the sanitary landfill method: due to the large area, high treatment costs, and waste of a lot of land resources, the applicable value is gradually reduced. Composting method: Due to incomplete utilization of organic matter, complex fertilizer components, and small reduction, it will be gradually eliminated. Garbage incineration has become the mainstream of harmless treatment of municipal solid waste because of its many unique advantages. The main manifestations are as follows: 1. After the garbage is incinerated, the pathogens in the garbage are completely eliminated, and the harmful gas and smoke generated during the burning process meet the emission requirements after treatment, and the degree of harmlessness is high. 2. Garbage can lose 80% of its weight and more than 90% of its capacity after being incinerated, which has a good reduction effect and...

AI Technical Summary

Problems solved by technology

[0013] (2) Due to the interference of the moisture in the garbage, the output of wood acetic acid and tar is large, and the recovery value of complex components is low

[0014] (3) If the pyrolysis product is semi-coke, the output is small and not easy to use. If it is deep cracking, its own energy consumption is too large, which affects the recovery efficiency

[0015] (4) The pyrolysis gas of waste has low calorific value and small output, which is not convenient for comprehensive utilization

[0020] (1) The treatment technology is incomplete. China's garbage contains 30-60% of the dregs and soils. The project technology has not treated such substances well, resulting in a large amount of secondary landfill and easy to cause secondary pollution

[0021] (2) High operating cost; unstable quality of bio-methanol and poor sales form

[0022] (3) 10% of carbon ash is directly used as fuel with low added value

[0023] (4) The discharge of three wastes in the production process has not yet reached the standard

[0024] (5) The comprehensive heat energy and material conversion efficiency of the system is lower than 50%; the operating cost is high and the recovery efficiency is low

[0040] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art, and provide a comprehensive utilization process for the pyrolysis treatment of garbage sorting objects with advanced technology. To solve the problem of comprehensive utilization of pretreatment and pyrolysis steam, treat the waste as raw materials, and obtain different products and intermediate products through step-by-step sorting, processing and classification recycling, so as to improve the efficiency of waste treatment and recycling; completely harmless the waste The purpose of treatment, the process achieves a product recovery rate of more than 95%

Images