Gasification furnace and method for gasifying molded coal

Abstract

The invention relates to a gasification furnace and a method for gasifying molded coal. According to the invention, a plurality of grooves are provided on the inner wall of the hearth of the gasification furnace, the grooves separate the inner wall of hearth from the outer wall of a charcoal layer, and a groove type ascending pipeline is formed; high temperature flames and high temperature gas which have been horizontally sprayed to all the grooves are quenched and cooled in time during heat exchange with the inner wall of a water jacket, the cooled high temperature gas with dust undergoes heat exchange with the wall of the water jacket, the charcoal layer and a fireproof wall along the way during ascending in each groove so as to get further cooled, the dust scatters on the surface of the charcoal layer and in the grooves when the cooled gas is sent out through the ascending pipeline, descending down blow steam in each groove undergoes heat exchange with the wall of the water jacket, the charcoal layer and the fireproof wall along the way, and superheated steam brings the scattered dust in each groove into the charcoal layer for gasification and slagging. The invention enables the phenomenon that molded coal hangs on a wall during gasification to be effectively prevented, the height of a gasification layer to be stabilized, system resistance to be reduced and energy saving and consumption reduction to be realized.

Description

technical field [0001] The invention relates to a coal gasification method with a fixed bed circulation method, in particular to a gasification furnace and a method for gasifying molded coal. Background technique [0002] There are two main types of fixed bed circulation coal gasification process currently used, one is the intermittent gasification method represented by UGI fixed bed gasifier, and the other is the two-stage furnace circulation gasification method represented by IGI . The traditional UGI and IGI coal gasifier batch gas production process can only use lump coke, anthracite lump coal, and anthracite drying and air-dried briquettes; as the prices of lump coke and anthracite lump coal have doubled, many Small and medium enterprises in ammonia synthesis are forced to use low-priced drying and air-drying briquettes. Generally speaking, cold-extruded briquettes need to be equipped with drying equipment to dry briquettes, and hot-extruded briquettes do not need to b...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a gasification furnace and a method for gasifying briquettes in view of the defects of the prior art, which solves the problem of wall-hanging briquettes gasification

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