Solid powder burner and use method thereof

Abstract

The invention discloses a solid powder burner and a use method thereof. The solid powder burner is characterized by comprising a central channel, a circular channel and a cooling system, wherein a sweep gas inlet, a powder fuel inlet, and a liquid / gaseous fuel inlet are sequentially formed in the central channel inlet; a sweep gas inlet and an oxygen-rich gas inlet are sequentially formed in the circular channel inlet; conventional furnace-baking of a gasifier can be finished by firstly igniting the liquid / gaseous fuel; a furnace-baking burner, an ignition burner, and a production burner used in the multiple burner gasification technology can be integrated into a whole through performing sweeping and fuel switching. According to the invention, a starting-up burner, the ignition burner and the production burner are integrated into a whole, the overall ignition process of the gasifier is simplified, and the manufacturing cost is reduced, so that the solid powder burner has the characteristics of versatility, wide application, and long service life.

Description

technical field [0001] The invention relates to a solid powder fuel burner and a use method thereof, and belongs to the technical field of gasification process burners. Background technique [0002] Dry coal powder entrained bed gasification technology is one of the mainstream gasification technologies in today's coal gasification technology. Its development history is simpler than that of coal water slurry entrained bed gasification technology. First, the dry powder feed is used, the raw material does not need to be atomized at high speed, and stable combustion and gasification can be achieved only through particle dispersion. However, due to the use of a cold-wall gasifier, the gasifier cannot be put into operation through simple In order to increase the problem in the gasifier to above 1300 ℃ and inject pulverized coal, because the natural gas or diesel oven is only used to get through the stable operation of the water wall hydrodynamic system, it also needs to cooperate ...

AI Technical Summary

Problems solved by technology

[0003] The start-up and ignition process of the existing solid fuel entrained bed gasifier is complicated, and the ignition process is started sequentially by using three types of burner combinations: the ignition burner, the start-up burner and the process burner. Heat the gasifier to a high temperature and high pressure state, and then start the process burner. In order to make the process burner reach a stable combustion state, the start-up burner will enter the stage of timely accompanying combustion

The operation of the existing device shows that the start-up process is complicated, and the burner head is very easy to burn out during the burning process of the start-up burner

[0004] Chinese patent CN200610030864.3 discloses a combustion nozzle of a dry coal powder pressurized gasifier, which mainly adopts a double-channel structure, and the middle channel and the annular channel are respectively injected with coal powder and gasification agent, which are used as the final operation during normal operation. The process burner, specifically as the above process is more complicated

Chinese patent CN200420114032.6 discloses a different burner cooling method from patent CN200610030864.3, but retains the dual-channel structure setting, and its functions and effects are basically the same

[0005] In order to effectively solve the multiple complex links involved in the dry coal gasification process, it is necessary to achieve an integrated breakthrough in the function and structure of the process burner, and simplify the complex gasifier start-up process, but this integrated technology has not been achieved. solve

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