Process for preparing gas by microwave carbon pyrolysis of municipal solid waste

Abstract

The invention relates to a process for preparing gas by the microwave carbon pyrolysis of municipal solid waste and belongs to the technical field of environmental protection. The process comprises the following steps of: removing dust from municipal solid waste which is accumulated for a certain time, press-packing, and feeding into microwave heating equipment for pyrolysis; separating fixed carbon and residue which are generated by the pyrolysis, and making the fixed carbon into a shape which is loose and through which gas can conveniently pass; continuously heating the fixed carbon, and fully cracking incomplete pyrolysis gas and biological oil to generate combustible gas; reacting water vapor and thermofixed carbon to generate water gas; and performing purification treatment such as desulfurization and dephosphorization on the gas to obtain harmless combustible gas. By the process, the yield of the gas is high, the calorific value is high, the energy is equal to or higher than the energy consumed by the process, and the operation cost is low; and toxic and substances with peculiar smell such as dioxin are eradicated while a large amount of harmless combustible gas is obtained, so that the environment is effectively protected.

Description

technical field [0001] The invention relates to a treatment process of household garbage, in particular to a process for harmlessly treating urban household garbage with microwave technology and obtaining gas, which belongs to the technical field of environmental protection. Background technique [0002] With the rapid development of my country's economy and the acceleration of urbanization, urban domestic waste is also increasing at a rate of 10% per year. More than 600 cities across the country have stacked or filled 8 billion tons of domestic garbage, and about one-third of the cities are surrounded by garbage, which has polluted the environment while occupying a large amount of land. Since the 1970s and 1980s, developed countries such as the United States and Japan have carried out a large amount of research and application of waste cracking technology, but there are many problems: when using external heat heating method, the carbon accumulation on the wall is serious,...

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Problems solved by technology

The present invention aims to solve the problems that the existing garbage harmless treatment method cannot eradicate the output of dioxin, which causes environmental pollution, high energy consumption, and low yield of harmless combustible gas, and provides a harmless microwave Process for preparing gas by carbon pyrolysis of municipal solid waste

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