Multistage series-connection gasifier chamber structure

Abstract

The invention relates to entrained flow gasifier technology, and particularly discloses a multistage series-connection gasifier chamber structure which comprises a first-stage chamber, a second-stage chamber and a third-stage chamber which are sequentially connected in the longitudinal direction, wherein the first-stage chamber, second-stage chamber and third-stage chamber are respectively a hollow cylinder and are connected through a hollow cone. By organizing the gasifier chambers in a multistage series-connection structure, the reaction regions in the chambers are distributed in a more reasonable way, thereby prolonging the retention time of coal powder particles in the reaction regions, increasing the carbon conversion rate, reducing the volume of the upper mixing region and pyrolysis region, reinforcing the mass transfer, reducing the high-temperature backflow region and lowering the possibility of vault slump.

Description

technical field [0001] The invention relates to the technology of an entrained bed gasification furnace, in particular to the furnace structure of a multi-stage serial gasification furnace. Background technique [0002] The entrained bed gasifier has the characteristics of strong adaptability to coal types, high degree of automation, stable and reliable operation, high gasification intensity, high gasification efficiency and simple treatment of three wastes. It is currently the mainstream gasifier type. [0003] At present, the entrained-flow gasifier can be divided into one-stage furnace and two-stage furnace according to the gasification space, and can be divided into coal-water slurry gasifier and dry coal powder gasifier according to the feed material, and can be divided into liquid gasifier according to the slagging method. Slagging and solid-state slagging gasifiers. [0004] The structures of the existing entrained-bed gasification furnaces are all single cylinders o...

AI Technical Summary

Problems solved by technology

For entrained bed gasifiers (including coal water slurry and dry pulverized coal gasifiers), during the coal gasification process, the gas flow rate will gradually increase as the reaction proceeds, and the furnace space of equal furnace diameter is not suitable for each gasification reaction. Step-by-step requirements are not conducive to the optimization of the reaction process; at the same time, due to the large volume of the front end of the reaction zone, it will cause a local high-temperature reflow zone in the front section of the reaction zone, resulting in low space utilization of the gasification furnace and increasing the possibility of vault collapse caused by high-temperature radiation sex

[0005] The above defects are all caused by the unreasonable layout of the existing entrained-flow gasifier furnace, and there will also be problems such as low carbon conversion rate, improper distribution of flow field and temperature field

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