Solid waste disposal method

Abstract

The invention discloses a solid waste disposal method, and relates to the technical field of disposal of multiple types of solid waste. The solid waste disposal method comprises the following steps that S1, multiple types of solid waste are classified and pretreated; S2, RDF obtained in the step S1 is subjected to pyrolysis to obtain carbon residues and pyrolytic tar, solid-phase materials obtained in the step S1 are subjected to aerobic fermentation, and a water phase obtained in the step S1 is subjected to anaerobic fermentation to obtain methane and biogas residues through separation; S3, the carbon residues, dry compounds and the biogas residues obtained in the step S2 are mixed with sludge, and SDF is prepared; and S4, the SDF obtained in the step S3 is fed into a gas-fired furnace, fuel gas is prepared, and meanwhile inorganic matter and heavy metal in the residues are sintered to form building materials. The solid waste disposal method has the beneficial effects of realizing collaborative and concentrated treatment of multiple types of solid waste, not only realizing treatment of multiple types of solid waste, but also realizing recycling of multiple types of solid waste.

Description

technical field [0001] The invention relates to the technical field of multi-type solid waste disposal, in particular to a solid waste treatment method. Background technique [0002] With the rapid development of industrial civilization and the acceleration of urbanization in my country, the "quality" and quantity of domestic waste are changing. The proportion of organic matter (mainly packaging materials) has increased, the proportion of inorganic matter (ash, soil, bricks, tiles, stones, etc.) has shown a downward trend, the proportion of recyclables has increased, the composition of combustibles has increased, and the calorific value has decreased. improved. At present, the treatment methods of domestic waste mainly include sanitary landfill, incineration, and composting. [0003] Mineralized waste refers to waste that has been buried in landfills for many years, and after years of degradation, almost no gas is produced, and the waste is basically stabilized and can be ...

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to provide a solid waste treatment method to solve or at least alleviate at least one of the problems in the background art

[0012] The present invention adopts the comprehensive treatment process of "pretreatment--low-temperature pyrolysis--aerobic fermentation--high-temperature gasification" to carry out cooperative disposal of various solid wastes, which can solve the problem of incomplete reduction in the treatment of various solid wastes. Uncontrollable secondary pollution, scattered projects, difficult management and monitoring, etc.

Organically combine the environmental protection disposal of solid waste with its resource transformation, and at the same time solve the problems of primary production waste treatment, renewable resource supply, regional production and living environment management, etc.

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