A system and method for pyrolysis, gasification and melting of garbage

Abstract

The invention provides a system and method for waste pyrolysis, gasification and fusion. The system comprises a sorting device, a crushing device, a heat storage type rotating bed used for performing drying and pyrolysis treatment on waste so as to obtain pyrolytic water, pyrolytic oil and gas mixtures and pyrolytic carbon, a gasification and fusion reaction chamber used for making pyrolytic oil and hydrocarbon gas subjected to gasification and recombination under the high-temperature gasification effect of a plasma torch so as to obtain synthesized gas comprising CO and H2 and fusing the pyrolytic carbon into glass state slag, a heat exchange device, a power generation device and a coke quenching device. The heat storage type rotating bed is adopted to perform pyrolysis on pretreated waste raw materials; the gasification and fusion reaction chamber is used for gasifying the pyrolytic oil and gas mixtures, water obtained through drying serves as water for coke quenching of the pyrolytic carbon, and the obtained synthesized gas is high in yield and heat value and is used as fuel gas of a heat storage type radiant pipe; and steam obtained by performing heat exchange treatment on the synthesized gas can be used for power generation selling, and the 'harmless, reduction and recycling' treatment of waste is achieved.

Description

technical field [0001] The invention belongs to the technical field of solid waste treatment, and in particular relates to a system and method for pyrolysis, gasification and melting of waste. Background technique [0002] With the rapid development of my country's economy, material consumption is increasing day by day, and the output of domestic waste is also gradually increasing. A large amount of household garbage is randomly piled up, which will not only pollute the soil and water sources, but also affect human health. Therefore, how to effectively deal with household garbage is one of the major environmental problems faced by our country and countries all over the world. At present, technologies such as landfilling and composting have been gradually eliminated. Although incineration power generation has a significant reduction effect, it will also bring about problems such as dioxins. The domestic waste pyrolysis technology is to heat the materials in an oxygen-free or...

AI Technical Summary

Problems solved by technology

For example, some garbage rotary kiln pyrolysis processes produce a lot of tar, which is easy to block pipelines and corrode equipment, etc., often shut down for maintenance, and the back end requires complex oil-water separation and purification devices, resulting in a significant increase in investment

Some garbage shaft furnace gasification and melting technologies directly use plasma torch to gasify and melt garbage raw materials. When dealing with large-scale garbage, the power of this process is extremely high and the power consumption rate is very high, which leads to increased operating costs and is difficult to realize. Industrial application

There are also some waste treatment processes that realize waste pyrolysis and gasification in one furnace. Although a large amount of synthesis gas is generated, the gas quality is poor and the operating cost is high, so it does not have commercial operation value.

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