Coal gasification device for circulating fluidized bed

Abstract

The invention discloses a coal gasification device for a circulating fluidized bed. The coal gasification device comprises a start combustion chamber, a raising pipe and a primary cyclone separator, wherein the start combustion chamber is arranged at the lower end of the raising pipe; a slag discharge opening and a fuel inlet are further arranged in the lower end of the raising pipe; a pulverized coal inlet is arranged in the middle part of the raising pipe; a smoke outlet is arranged in the upper end of the raising pipe; the primary cyclone separator is connected with the smoke outlet of the raising pipe; an M-shaped material returner is arranged at the lower end of the primary cyclone separator; a material returning tuyere, a loosening tuyere and an ash discharge tuyere are respectively arranged at the bottom of the M-shaped material returner; a material returning pipe is arranged at the upper end of the material returning tuyere; an ash discharge pipe is arranged at the upper end of the ash discharge tuyere; and the material returning pipe is connected to the middle part of the raising pipe. According to the coal gasification device disclosed by the invention, ash discharge operations are carried out at the bottom of the raising pipe and inside the M-shaped material returner respectively. Compared with the situation of singly discharging slag at the bottom of the raising pipe in the prior art, the M-shaped material returner obviously has a lower carbon content.

Description

technical field [0001] The invention relates to a method and a device for a coal gasification reactor. In particular, it relates to a method and apparatus for a pressurized circulating fluidized bed. Background technique [0002] In today's world, the pollution of the air caused by coal burning is very serious, and clean coal technology must be vigorously developed. Coal gasification is the most important clean coal technology widely used, and the most important unit technology for the development of modern coal chemical industry. At present, there are dozens of coal gasification technologies being applied and developed in the world, and the types of gasification furnaces are also various. According to the state of movement of coal gas and gasification agent in the gasification furnace, they can be divided into moving bed, fluidized bed, There are four types of entrained bed and molten bed gasification methods, and with the development of higher gasification pressure, high-...

AI Technical Summary

Problems solved by technology

At present, there are dozens of coal gasification technologies being applied and developed in the world, and the types of gasification furnaces are also various. According to the state of movement of coal gas and gasification agent in the gasification furnace, it can be divided into moving bed, fluidized bed, There are four types of entrained bed and molten bed gasification methods, and with the development of higher gasification pressure, high-pressure circulating fluidized bed gasifier has become one of the main directions of future development, which is different from normal pressure circulating fluidized bed What is more complex is the ash removal problem faced by high-pressure circulating fluidized bed gasifiers

[0003] At present, the pressurized coal gasification circulating fluidized bed adopts slag discharge at the bottom of the riser, and a large part of the unreacted coal at the bottom of the riser is directly discharged through the slag discharge pipe, and cannot be burned.

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