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Combined sorting technology and device for realizing carbon-ash separation of gasified residues

A technology of gasification slag and coal gasification slag, which is applied in the direction of solid separation, wet separation, chemical instruments and methods, etc., can solve the problems of large consumption of chemicals and high cost, and achieve the effect of low production cost and high separation efficiency

Active Publication Date: 2020-09-11
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above flotation methods all have the problems of large reagent consumption and high cost

Method used

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  • Combined sorting technology and device for realizing carbon-ash separation of gasified residues
  • Combined sorting technology and device for realizing carbon-ash separation of gasified residues

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1. The gasification slag enters the slurry preparation barrel 2 through the conveyor belt 1, and a certain quality of water and coal gasification slag are added and stirred thoroughly to form a slurry with a mass concentration of 70g / L. The coal gasification slag is fully dispersed in the slurry preparation barrel.

[0031] 2. The gasification slag slurry is pumped into the high-frequency screen 3 by the delivery pump P1, and the particles and impurities above 3mm are removed by the high-frequency screen 3. After the particles and impurities on the screen are dehydrated, they are directly treated as coarse-grained and high-ash products.

[0032] 3. The slurry under the screen enters the slurry buffer tank T1, and is pumped into the 150mm-diameter coal slime cyclone gravity separation column 4 through the delivery pump P2 for separation. The feeding pressure is 0.15Mpa, and the overflow of the coal slime cyclone gravity gravity separation column 4 is buffered The barrel T...

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PUM

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Abstract

The invention discloses a combined sorting technology and device for realizing the carbon-ash separation of gasified residues. The device comprises conveying equipment, an ore pulp bucket, sieving anddewatering equipment, a water medium cyclone, a classifying cyclone, a centrifugal machine, a high-gradient magnetic separator, a filter press, flotation equipment, a concentration pool and ore pulpconveying and pumping equipment. Through the water medium cyclone, a thick granulometric class in the gasified residues is subjected to carbon-ash separation to obtain a high carbon product and a highash product, a thin granulometric class in the gasified residues is firstly subjected to high-gradient magnetic separation to remove high ash substances, and fine-grained nonmagnetic products are further separated through a floatation method. The technology has the advantages of a large gravity sorting handling capacity, and meanwhile, the technology exhibits better pertinence for fine grains andmagnetic particles.

Description

technical field [0001] The invention belongs to the field of resource utilization of coal gasification slag, and in particular relates to a method for separating carbon and ash of gasification slag by a gasification slag weight-magnetism-flotation combined separation process. Background technique [0002] Coal gasification technology is the leading and core technology of the modern coal chemical industry, and gasification slag solid waste will be produced during the gasification process. Research on gasification slag has found that gasification slag contains a large amount of unburned carbon (residual carbon), and the residual carbon in the fine slag even reaches more than 30%, which is much higher than that of boiler fly ash for preparing concrete, cement and other construction materials. The requirement of loss on ignition has seriously affected the bulk utilization of gasification slag, so that it can only be disposed of in landfill, which not only wastes valuable carbon ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B7/00
CPCB03B7/00
Inventor 樊盼盼董连平王建成樊民强鲍卫仁
Owner TAIYUAN UNIV OF TECH
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