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A combined separation process and device for realizing gasification slag carbon-ash separation

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: 2022-04-12
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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  • A combined separation process and device for realizing gasification slag carbon-ash separation
  • A combined separation process and device for realizing gasification slag carbon-ash separation

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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Abstract

The invention discloses a combined sorting process and device for realizing gasification slag carbon-ash separation. The device includes conveying equipment, slurry tank, screening and dehydration equipment, hydrocyclone, grading cyclone, centrifuge, high gradient magnetic separator, filter press, flotation equipment, thickening tank, and slurry delivery pump equipment. The carbon-ash separation of the coarser grades in the gasification slag is carried out through a water-mediated cyclone to obtain high-carbon products and high-ash products; the finer-grained grades in the gasification slag are firstly separated by high-gradient magnetic separation. The gray matter is removed, and the fine-grained non-magnetic products after preliminary separation are further separated by flotation. This process has the advantage of large processing capacity of gravity separation, and it is more targeted to fine particles and magnetic 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 Patents(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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