Gas distributor and gasification furnace

Abstract

The invention relates to the technical field of chemical equipment, in particular to a gas distributor and a gasification furnace. The gas distributor can distribute part of airflow passing through horizontal openings along a vertical direction as required, so that the distribution of a flow field can be optimized, a flow dead zone caused by uneven distribution of the flow field can be avoided, smooth slag discharge can be realized, and the operation and maintenance cost of the gasification furnace can be reduced. The embodiment of the invention provides a gas distributor, which comprises a conical distribution plate with a slag discharge port at the bottom; the conical distribution plate is provided with a plurality of horizontal openings penetrating through inner and outer annular surfaces; the horizontal openings of the conical distribution plate corresponding to a first fluidization area are positioned on the inner side of the conical distribution plate and are connected with a gasdistribution structure respectively; and the gas distribution structure is used for re-distributing the air flow introduced into the horizontal openings of the conical distribution plate corresponding to the first fluidization area, so that the air flow passing through the horizontal openings of the conical distribution plate corresponding to the first fluidization area is uniformly dispersed ina vertical direction. The gas distributor provided by the embodiment of the invention is used for distributing gas in the gasification furnace.

Description

technical field [0001] The invention relates to the technical field of chemical equipment, in particular to a gas distributor and a gasifier. Background technique [0002] Fluidized bed coal gasification technology is one of the earliest industrialized gasification processes. The process is that the raw coal maintains continuous boiling and suspension state movement under the action of bottom-up gasification agent, and rapidly mixes and exchanges heat. gasification technology. As the main component of the fluidized bed equipment, the gasification agent distribution device (generally called "distribution plate" or "distributor") plays an important role in evenly distributing gas and supporting solid particles, and its shape and structure greatly affect the equipment. Production operation performance such as heat transfer and mass transfer. Specifically, the fluidized bed gas distributor is mainly used to evenly distribute the gasification agent, so that the gasification age...

AI Technical Summary

Problems solved by technology

However, when the direction of the opening is horizontal, the gasification agent is injected into the center of the gasifier through the horizontal opening, which will cause the bubbles in the center to gather and easily form large bubbles; while the distribution of the flow field in the area outside the center flow field is weak In this way, on the one hand, the high-concentration oxygen injected by the central jet tube is easily entrained into the large bubbles, resulting in uneven oxygen dispersion.

And under high temperature conditions, the center jet tube is severely impacted and worn by the large bubbles in the center, resulting in short service life of the center jet tube, high manufacturing cost, and difficult maintenance; at the same time, due to the excessive momentum of the center flow field, it is easy to discharge slag in the center Large air bubbles are formed at the mouth of the gasifier, causing the material to fail to fall normally and affecting the slag discharge, which cannot guarantee the normal operation of the gasifier; The distribution plate surface of the gasifier and the angle between the distribution plate and the gasifier wall form a flow dead zone

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