Jet assembly, multi-burner gasifier and feeding system thereof

Abstract

The invention discloses a jet assembly, a multi-burner gasifier and a feeding system thereof. The gasifier comprises a gasifier body (1) and a body top seal head (2). The jet assembly (3) comprises a burner table (32) mounted on the body top seal head, more than two burner units are mounted on the burner table, burner openings (31) of the burner units are annularly distributed and circumferentially spaced, and the jet directions of the burner openings are vertically downward or obliquely downward but not collected at one point. A pulverized coal or coal slurry conveying device (4) can respectively and independently convey pulverized coal or coal slurry for each burner or each group of burners, so that stable and symmetric flow field distribution can be achieved while mass transfer efficiency is improved by the multiple burners, standing time of particles in a furnace chamber is prolonged, and mixing effects of the particles and gasifying agents are enhanced. The feeding system avoids the shortcomings of non-uniform distribution, easiness in blockage and difficulty in detachment and maintenance by independent or grouped independent pulverized coal supply of the burners.

Description

technical field [0001] The invention relates to a gasification furnace, in particular to an overhead multi-nozzle gasification furnace. Background technique [0002] Entrained bed coal gasification technology is required to be carried out under high temperature and high pressure, and its kinetic control is basically transformed into mass transfer control. Therefore, how to improve the mass transfer and mixing efficiency is one of the key elements in the design process of coal gasification equipment. The design of the nozzle is crucial important. [0003] The current gasifier mostly adopts the multi-nozzle mode. The gasifier under the multi-nozzle mode will significantly improve the micro-mixing efficiency due to the increase of the mass transfer area and the shortening of the mass transfer distance. Due to the interaction between nozzles and between nozzles and walls, it is difficult to obtain a stable and symmetrical free jet field in the furnace under the condition of a s...

AI Technical Summary

Problems solved by technology

[0007] Aiming at the above-mentioned defects or deficiencies in the prior art, the present invention provides a multi-nozzle gasifier and its feeding system. The multi-nozzle gasifier can optimize the flow field distribution in the furnace, effectively improve mass transfer efficiency, increase The residence time of large particles, the feeding system can avoid the disadvantages of uneven material distribution, easy blockage and difficult disassembly and maintenance.

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