Circulating system of combustion gasification materiel for double fluidized bed

Abstract

The present invention discloses a double fluidized beds combustion-gasification material circulating system comprising a fluidized bed gasification furnace and a circulating fluidized bed combustion furnace; the middle portion of the fluidized bed gasification furnace is connected with a material charging chamber of a material returning chamber, and then is connected with the lower portion of the circulating fluidized bed combustion furnace through a material discharging chamber of the material returning device; the upper portion of the circulating fluidized bed is connected to a material charging chamber of a bi-directional material control device through a hyperthermia separator, then is divided into two paths, one path is connected with the lower portion of the fluidized bed gasification furnace through a hyperthermia conical valve on the side surface of the material charging chamber of the bi-directional material control chamber, and the other path is connected with the lower portion of the circulating fluidized bed combustion furnace through the material returning chamber of the bi-directional material control chamber. The circulating fluidized bed combustion furnace and the fluidized bed gasification furnace are combined tightly to implement gasification, combustion, classification and conversion of coal in one set of system, which leads to highly efficiency conversion of coal; the inventive system is also can be used broadly in combustion, gasification, catalysis and regeneration processes.

Description

technical field [0001] The invention relates to a combustion device, in particular to a dual fluidized bed combustion gasification material circulation system. Background technique [0002] The double fluidized bed system is widely used in combustion, gasification, metallurgy, catalysis and regeneration processes, among which the high-temperature circulating material control between the two furnaces is the key. The existing technology adopts methods such as pneumatic conveying or high-temperature Jiaolong mechanical conveying, and the system is complex , Poor reliability. Especially for the combustion gasification system, it is difficult to realize the circulation flow of a large amount of high-temperature circulating materials between the two furnaces and prevent the coal gas and flue gas from colluding between the two furnaces. On the basis of the existing CFB material circulation control technology, the present invention adopts the method of combining the fluidized bed f...

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Problems solved by technology

[0002] The double fluidized bed system is widely used in combustion, gasification, metallurgy, catalysis and regeneration processes, among which the high temperature circulating material control between the two furnaces is the key. The existing technology adopts methods such as pneumatic conveying or high temperature Jiaolong mechanical conveying, and the system is complex , poor reliability

Especially for the combustion gasification system, it is necessary to realize the circulation flow of a large amount of high-temperature circulating materials between the two furnaces, and to prevent the coal gas and flue gas from colluding between the two furnaces, which is difficult to solve by the existing technology

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