Fluid jet bed coal-to-synthetic gas gasification furnace

Abstract

The invention discloses a fluid jet bed coal-to-synthetic gas gasification furnace which comprises a furnace body, a spacer bush, an overflow pipe, a gas distribution plate and a center pipe, wherein a cavity is formed in the furnace body; the spacer bush is arranged in the cavity to divide the cavity into an upper cavity and a lower cavity; the overflow pipe is arranged at the outer side of the furnace body, one end of the overflow pipe is communicated with an inlet of the overflow pipe, and the other end of the overflow pipe is communicated with an outlet of the overflow pipe; the gas distribution plate is arranged in the lower cavity, and a slag discharge pipe which protrudes out of the lower cavity and discharges slag inside the lower cavity is arranged at the bottom of the gas distribution plate. According to the fluid jet bed coal-to-synthetic gas gasification furnace, the upper cavity and the lower cavity both form fluid jet beds, and the upper cavity and the lower cavity are communicated through a through hole; a solid material enters the upper cavity of the gasification furnace and then sufficiently contacts with a gasification agent and a synthetic gas, and the retention time of the solid material in the gasification furnace is prolonged, so that the methane (CH4) content, steam decomposition rate and carbon transformation rate of the synthetic gas are increased.

Description

technical field [0001] The invention relates to coal gasification technology, in particular to a jet bed coal-made synthesis gas gasification furnace. Background technique [0002] The traditional fluidized bed gasifier is usually a single-stage straight cylinder gasifier. In related technologies, pulverized coal is fed from the lower part of the gasifier, and the drying, pyrolysis, oxidation and gasification of pulverized coal are all carried out in the gasifier. The bottom is completed, resulting in gasification agents, such as water vapor cannot be fully reacted and utilized, the hydrogen generated by the gasification reaction cannot be fully reacted to form methane, and the residence time of some pulverized coal particles in the gasifier is too short. However, the structure of the multi-layer fluidized bed gasifier is more complex and the operation is more complicated, which is not conducive to the long-term stable operation of the gasifier; raw coal and catalyst are add...

AI Technical Summary

Problems solved by technology

[0002] The traditional fluidized bed gasifier is usually a single-stage straight cylinder gasifier. In related technologies, pulverized coal is fed from the lower part of the gasifier, and the drying, pyrolysis, oxidation and gasification of pulverized coal are all carried out in the gasifier. The bottom is completed, resulting in the gasification agent, such as water vapor cannot be fully reacted and utilized, the hydrogen generated by the gasification reaction cannot be fully reacted to form methane, and the residence time of some pulverized coal particles in the gasifier is too short, etc.

However, the structure of the multi-layer fluidized bed gasifier is more complex and the operation is more complicated, which is not conducive to the long-term stable operation of the gasifier; raw coal and catalyst are added to each layer of fluidized bed, resulting in the temperature of each layer of fluidized bed is not easy control, which affects the gasification effect; moreover, it needs to use a catalyst, which increases the cost

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