Moving bed gasification furnace

Abstract

The invention provides a moving bed gasification furnace which is used for fuel gasification. The moving bed gasification furnace comprises a furnace body, wherein the inside of the side wall of the furnace body is provided with a water cooling wall through which cooling water can pass, which is used for reducing high temperature generated by gasification of the fuel in the furnace body; a cavity is formed between the side wall and water cooling wall of the furnace body; and the cavity can be filled with inert gas to prevent the furnace body from overhigh temperature. The water cooling wall is arranged inside the moving bed gasification furnace to protect the furnace body of the moving bed gasification furnace, thereby avoiding the damage to the furnace body due to overhigh temperature.

Description

technical field [0001] The invention relates to a gasification furnace, in particular to a water-cooled wall-type moving bed gasification furnace. Background technique [0002] In the process of coal gasification to produce synthesis gas, the gasifier and gasification method are the key links in the gasification process. Up to now, industrialized gasifiers can be divided into three categories: moving bed, entrained flow and fluidized bed process. Among them, the moving bed means that the gasification raw material and gasification oxygen enter the furnace synchronously, but the relative movement speed of the gasification raw material particles is very slow. Representatives of such moving bed gasifiers include: traditional Lurgi furnace, BGL gasifier and YM Yunwei furnace. [0003] Among them, the Lurgi furnace is cooled by a water jacket in the furnace body, and solid-state ash is discharged. The disadvantage is that the gasification energy is low, the water jacket is easy ...

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Problems solved by technology

[0005] However, in practice, the daily output of the furnace type with a diameter of 4500mm is 900-1050 tons (dry basis), and the gasification intensity is still relatively low compared with other furnace types. The main reason is that this furnace type uses a water jacket to protect the outer furnace body. The inner lining is made of refractory bricks with a thickness of 220mm, the effective furnace diameter is only 3600mm, and the utilization rate of the internal space is low, so that the amount of coal input is limited

[0006] The patent No. CN102041098B is disclosed in the Chinese patent, which discloses a fixed bed slag gasifier. In this kind of gasifier, the composite furnace lining and the composite furnace lining include four layers of refractory bricks, and its structure is too large. Complicated, not conducive to improving gasification intensity

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