Gasification system for plasma-assisted garbage fluidized bed

Abstract

The invention relates to a gasification system for a plasma-assisted garbage fluidized bed. The gasification system comprises a garbage feeding device, a fluidized bed reactor, a plasma reforming chamber and a cyclone separator, wherein the garbage feeding device is connected with the fluidized bed reactor; the fluidized bed reactor is connected with the plasma reforming chamber through a synthesis gas outlet; the plasma reforming chamber is connected with the cyclone separator; and two plasma torches with a certain included angle are arranged on the top of the plasma reforming chamber. According to the gasification system, by adopting the structure of removing toxic and harmful substances by side feeding, upper exhausting and reaction chamber reforming, and improving a heat source for garbage pyrolysis and gasification employing a synthesis gas as circulating fluidized air, anoxycausis, pyrolysis and gasification are carried out by using the heat value of the garbage, and then plasma high-temperature treatment is carried out on the generated synthesis gas and fly ashes, so that direct pyrolysis and gasification on the garbage caused by plasma high temperature are avoided; the power consumption is greatly reduced; and meanwhile, the harmful substances such as dioxin can be safely and stably removed by the high-temperature synthesis gas generated by pyrolysis and gasification.

Description

technical field [0001] The invention relates to the treatment technology of urban living garbage, in particular to a plasma-assisted fluidized bed gasification system for garbage that can prevent the generation of dioxin. Background technique [0002] With the continuous growth of the global economy and the acceleration of urbanization, the generation of domestic waste has become an increasingly serious environmental problem. The increasing output of municipal solid waste and its environmental pollution has become a common problem faced by all countries. Harmless treatment of municipal solid waste is one of the important measures to promote the sustainable development of economy and ecological environment. [0003] At present, the harmless treatment technologies of municipal solid waste include composting technology, landfill technology, incineration technology and gasification technology. Neither landfill nor compost can fully realize the harmlessness and reduction of wast...

AI Technical Summary

Problems solved by technology

However, the current plasma waste gasification technology still has many deficiencies.

First of all, direct gasification of garbage with a plasma torch requires a huge amount of power, and its power consumption rate can reach 30% to 40% of the power it produces. Due to the high power consumption, the operating cost is greatly increased, making it unworthy of commercial operation

Second, this method gasifies garbage, and a dioxin treatment device needs to be added to the subsequent gas purification process, which increases the initial one-time investment and greatly increases the equipment cost

Third, using a plasma torch to directly gasify garbage, due to the uneven distribution of its temperature field, the garbage cannot be completely treated at high temperature, and there will be a large amount of dioxins and other harmful substances in the discharged waste residue, which makes the treatment of its waste residue become a problem. a problem

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