Internal circulating fluidized-bed oxygen-enriched gasification device

Abstract

The invention provides an internal circulating fluidized-bed oxygen-enriched gasification device. The device comprises a gasifier body, a rich oxygen generation device, a multi-air-chamber air distribution device, a feeding device and a deslagging device, wherein the gasifier body consists of a lower dense-phase region and an upper dilute-phase region; the dense-phase region is connected with the dilute-phase region through a throat region; the multi-air-chamber air distribution device which is provided with directional wind caps is arranged at the bottom of the dense-phase region and is connected with the rich oxygen generation device; an outlet of the feeding device is arranged at the junction of the dense-phase section and the dilute-phase section; a slag outlet is arranged at a gap of the multi-air-chamber air distribution device and the gasifier body at the bottom of the dense-phase section; the deslagging device is arranged below the slag outlet. The system can efficiently realize pyrolysis and gasification of waste solid organic matters such as garbage and biomass, and has the advantages of high gasification speed, high conversion efficiency, less deslagging carbon residue, easiness in control over pollutants and the like.

Description

technical field [0001] The invention relates to the field of pyrolysis and gasification of solid organic waste, in particular to an internal circulating fluidized bed oxygen-enriched gasification device. technical background [0002] With the rapid development of the country's economy, the generation of organic solid waste led by municipal solid waste has increased sharply, and the problem of disposal is imminent. [0003] At present, my country's waste treatment mainly adopts landfill, composting and incineration. Landfills are prone to produce methane-rich landfill gas, causing explosions, and a large amount of landfill leachate, which contains heavy metals, toxic and harmful organic chemical pollutants, and a large number of viral pathogens. Due to the imprecise classification of waste in the composting method, the fertilizer quality is low and difficult to sell. When the incineration method is used to treat municipal solid waste, since the solid waste contains a large ...

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Problems solved by technology

Once the gasification furnace does not reach the appropriate temperature, it cannot guarantee a sufficient gasification rate, resulting in excessive carbon content in the bottom slag, resulting in energy waste; and insufficient heat value of the syngas will lead to subsequent gasification without auxiliary fuel. The temperature of the melting furnace is low, and it is difficult to realize the melting of fly ash, which leads to a decrease in the collection rate of fly ash, resulting in a decrease in the environmental protection of the system

At present, my country's garbage has a high moisture content and a low calorific value, which cannot meet the needs of the current garbage gasification and melting process.

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