Gasification furnace

Abstract

The invention discloses a gasification furnace, and belongs to the technical field of gasification, the gasification furnace comprises a gasification furnace shell, a gasification chamber and a chilling chamber which are arranged up and down are arranged in the gasification furnace shell, the top of the gasification furnace shell is provided with a raw material inlet communicated with the gasification chamber, and the bottom of the gasification furnace shell is provided with a slag outlet communicated with the chilling chamber; the lower end of the gasification chamber is a contraction section, the contraction section of the gasification chamber is communicated with the first end of the slag discharging channel, and the second end of the slag discharging channel extends into the chilling chamber. According to the gasification furnace provided by the invention, high-temperature molten ash is carried by high-temperature gas to be discharged into the chilling chamber instead of self-flowing of the high-temperature molten ash, and the high-temperature gas continuously passes through the slag outlet, so that the temperature of the slag outlet can be kept, and blockage caused by temperature reduction of the slag outlet is prevented.

Description

technical field [0001] The invention belongs to the technical field of gasification, and in particular relates to a gasification furnace. Background technique [0002] Fixed bed gasifier is a kind of equipment that produces synthesis gas by reacting block carbonaceous material with gasification agent. form discharge. In the 1970s, British Gas Company and German Lurgi Company jointly developed the BGL liquid slag discharge fixed-bed gasifier. The ash and slag were discharged in liquid form. By increasing the gasification temperature, the gasification intensity and production capacity were greatly improved. The decomposition rate of water vapor in the gasification agent is increased, and the waste water produced by the gasification furnace is reduced. BGL gasifier has been applied in China Coal Tuke Fertilizer Plant and other projects. [0003] BGL liquid slag discharge fixed bed gasifier requires that the viscosity of the coal ash at the slag outlet is within a certain ran...

AI Technical Summary

Problems solved by technology

However, because the agitator is long and has no support at the bottom, the agitator is subjected to a large torque, which causes damage to the weld seam and serious leakage of cooling water, resulting in a large change in the bed resistance in the gasifier, or blockage of the outlet of the gasifier, and eventually Causing the gasifier to be shut down

Therefore, frequent maintenance of the agitator is required, which affects the long-term operation of the gasifier

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