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

A technology for automatic recovery of coal gasification slag, applied in the petroleum industry, solid fuel, solid waste removal and other directions, can solve problems such as increased operating costs, complicated processes, and high slag content, achieve great environmental benefits, and eliminate dust pollution. , the effect of creating economic benefits

Active Publication Date: 2009-07-15
ZHISHENG CHEM
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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

Method used

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

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Embodiment Construction

[0007] The flow process of the present invention is as follows: the mixed slag discharge of small grain slag, residual carbon briquettes and bonded slag body produced by the gasifier can be carried out manually or automatically, continuously or intermittently, and the good slag is transported to the slag yard, directly Put the mixed slag into the silo (1), and set the spray device (2) on the top of the silo (1) to adjust the mixed slag by adding water; (1) Stay for a period of time in order to facilitate the full cracking of the bonded slag body. The residence time is about 0.5 to 5 hours, and the optimal residence time is 1 to 2 hours. The large sticky slag is fully decomposed and cracked in the silo (1), and the slag and residual carbon are separated by cracking, and then enters the chain bucket conveyor belt (3) from the bottom of the silo (1) and sends it to the drum screen (4 ) or a vibrating sieve; the drum sieve (4) sieves the small slag and bonded slag in the original ...

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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 ...

Claims

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Application Information

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IPC IPC(8): B09B3/00C10L5/00
Inventor 李仁茂王加奖罗建烘吴文钦
Owner ZHISHENG CHEM
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