Method for automatically recycling and treating carbon residue from boiler slag of coal gasification

Abstract

The invention relates to an automatic carbon residue recovery method for coal gasification slag treatment, which belongs to the technical field of coal gasification slag treatment and is characterized in that mixed slag is filled in a storage hopper, the top of the storage hopper is provided with a spraying device, the mixed slag is adjusted by adding water and stands in the storage hopper for 1-2 hours, and slag and carbon residue are separated from the mixed slag by schizolysis and then sieved; the sieve pore diameters of the front section and the rear section of a sievemesh are different, the slag is sieved out from the front section of the sievemesh, the carbon residue with a grain diameter between 10 mm and 15 mm is sieved out from the rear section of the sievemesh, and original carbon residue contained in the sieved carbon residue and mixed slag enters a second-stage carbon residue storage hopper from the tail part of a revolving screen. The invention utilizes the schizolysis to split the slag by adopting a principle that the stability of two substances with different structures are different because of the difference of the structures, thereby enabling the slag with complex grain diameters to become two materials which are easy to sieve so as to be recycled, such as fine slag with a small grain diameter and carbon residue coalballs which can not be split by the schizolysis but can be recycled, and realizing the automatic recycling of gasification slag carbon residue and the close type treatment.

Description

Technical field: [0001] The invention belongs to the technical field of coal gasification slag treatment, is an effective technology for automatic recovery of slag residual carbon in a fixed-layer intermittent coal gasification method, and is particularly aimed at the coal gasification reaction process using binder-type briquettes as raw materials. Background technique: [0002] The mixed slag produced by the reaction of fixed-layer batch coal gasification materials with briquettes as raw materials contains small granules of slag after reaction, unreacted residual carbon briquettes, and residual carbon briquettes and slag are melted and bonded under high temperature conditions. Slag body. Among them, the unreacted residual carbon briquettes account for 20-30% of the slag. The recovery and reuse of this part of residual carbon can greatly improve the utilization rate of gas-making raw material coal and reduce energy consumption. The particle size of part of the slag in the ...

AI Technical Summary

Problems solved by technology

These separation methods are complex in process, large in investment, and the slag content in the separated carbon residue is large. In order to recycle the residual carbon well, secondary screening must be carried out, which complicates the process and increases the operating cost.

Images