Double-bed composite coal gasifier for burning out carbon-containing fly ash

Abstract

The invention relates to a double-bed composite coal gasifier for burning out carbon-containing fly ash, wherein the double-bed composite coal gasifier is characterized in that the carbon-containing fly ash generated in a circulating fluidized bed at the upper part is separated and then fed into a high-temperature slag coke layer of a pyrolysis fixed bed arranged at the lower part of a same furnace chamber by a fly ash dispersing disc to be burnt and gasified until the carbon-containing fly ash is burnt out. The fly ash dispersing disc is composed of a first-stage ash distributing pipe, an ash distributing ring, a second-stage ash distributing pipe, an ash distributing ring and an ash spraying ring; and a fly ash input pipe is communicated with the ash distributing ring through the first-stage ash distributing pipe, the ash distributing ring is communicated with the ash spraying ring through the second-stage ash distributing pipe, the ash spraying ring is connected with a furnace core, the ash spraying ring is provided with ash spraying holes, and the ash spraying holes feed carbon-containing fly ash into a high-temperature coke slag layer of a fixed bed. The double-bed composite coal gasifier has the advantages of energy conservation, environmental protection, smooth fly ash conveying, uniform distribution in the furnace chamber, thorough combustion and gasification and the like.

Description

technical field [0001] The invention relates to a gasification furnace, in particular to a double-bed composite coal gasification furnace with carbon-containing fly ash recycled and gasified and burnt out, and belongs to the technical field of coal gasification. Background technique [0002] In recent years, despite the rapid development and utilization of clean energy such as wind power, hydropower, nuclear power and photovoltaics, they still cannot meet the needs of social development. On the one hand, the total amount of energy developed cannot meet the requirements, and on the other hand, the price is high and the cost of use is relatively high. Due to its large stock and low price, coal is still the main source of heat for my country's smelting, chemical, ceramic and other industries at present and for a certain period of time in the future. Focusing on the efficient and clean utilization of coal, various coal gasifiers have been designed. The most widely used are fixed...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problem that the carbon-containing fly ash produced by the circulating fluidized bed is difficult to handle in the background technology, the present invention proposes a double-bed composite coal gasifier that burns out the carbon-containing fly ash

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