Mild technique for separating coal whole components

A full-component, mild technology, applied in the petroleum industry, solid fuel, solid solvent extraction, etc., can solve problems such as unfavorable coal reuse, and achieve the effect of increasing value

Inactive Publication Date: 2008-08-06
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] This scheme extracts three kinds of components from coal through extraction and back extraction, but...

Method used

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  • Mild technique for separating coal whole components

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Experimental program
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Effect test

Embodiment 1

[0023] Embodiment 1: In Fig. 1, 1, solid-liquid mixer; 2, extractor; 3, extraction solid-liquid separator; 4, extraction liquid stripper; 5, stripping solid-liquid separator; 6, layering Separator; 7, raffinate coal scrubber; 8, raffinate coal dryer; 9, ultra-pure coal I scrubber; 10, ultra-pure coal I dryer; 11, atmospheric distiller; 12, layered liquid reaction Extractor; 13. Adhesive component dryer; 14. Coarse membrane separator; 15. Fine membrane separator; 16. Atmospheric rectification tower; 17. Vacuum distillation tower; 18. Ultra-pure coal II dryer; 19. Ultrafine mineral dryer; 20. Liquid-liquid mixer.

[0024] For a commercial coal sample with a carbon content of 86.5% (W%, daf), a coal sample of <100 mesh is prepared by crushing, and the whole components are separated according to the following process:

[0025] Put the raw coal into the solid-liquid mixer 1, mix it with the prepared mixed solvent of solvent A and solvent B at a ratio of 100L / kg coal, and then send...

Embodiment 2

[0034] Embodiment 2: To the coal commodity sample that carbon content is 85.0% (W%, daf), make the coal sample of < 120 mesh through pulverization, carry out whole component separation according to the following technological process:

[0035] Put the raw coal into the solid-liquid mixer 1, mix it with the prepared mixed solvent of solvent A and solvent B at a ratio of 50L / kg coal, then send it to the extractor 2, and stir and extract at a pressure of 2atm and a temperature of 20°C for 300min. Then it is sent to solid-liquid separator 3 for solid-liquid separation; the separated solid phase components are sent to washing machine 7 and washed with solvent C at a ratio of 1L / kg solids, and the washed solid phase components are sent to dry In vessel 8, after drying at 0.01 atm and 50°C, the first component, that is, raffinate coal, is separated.

[0036] The liquid-phase extraction liquid of solid-liquid separator 3 is sent into stripper 4, and the solvent C from scrubber 7 is ca...

Embodiment 3

[0044] Embodiment 3: to the coal commodity sample that carbon content is 83.9% (W%, daf), make the coal sample of <300 meshes through pulverization, carry out whole component separation according to the following technological process:

[0045] The raw coal is added to the solid-liquid mixer 1, and the mixed solvent prepared with the raffinate of the atmospheric rectification tower 16 and the recovery solvent A is mixed with the ratio of 150L / kg coal and then sent to the extractor 2. Stir and extract at 100°C for 30 minutes, and then send it to the solid-liquid separator 3 for solid-liquid separation; the separated solid phase components are sent to the scrubber 7 to wash with solvent C at a ratio of 3L / kg solids, and the washed The solid phase components are sent to the drier 8, and after drying at 0.5atm and 120°C, the first component, namely raffinate coal, is separated.

[0046] The liquid-phase extraction liquid of solid-liquid separator 3 is sent into back extractor 4, a...

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Abstract

The invention relates to a mild technique of coal complete group separation, which belongs to the separating technique of coals. And the method comprises the following steps: mixing and extracting raw coal with the mixed dissolvent of dissolvent A and dissolvent B, separating out solid-phase component, getting coal residue after drying, adding dissolvent in the liquid phase which is separated out to reversely extract, precipitating solid body, obtaining superpurity coal I after washing solid-phase component which is separated from solid and liquid, stewing the liquid matter which is separated out, and layering, separating liquid in one of the stratification, recycling use, reversely extracting residual liquid to get solid-state matter, and getting binding component after drying, liquid of another layering liquid gets into a crude membrane separator, obtaining super-purity coal II after drying solid matter which is separated out, getting ultra-micro mineral after drying the solid matter which passes through a fine membrane separator and being separated through membrane, liquid of fine membrane separator normally presses a rectifying tower, separating out dissolvent C, dissolvent B and dissolvent A to repeatedly use, and residues are lightweight component. The technique has simple technique equipment, mild process, simple control and low production cost, and dissolvent can be recycled to use. The mild technique separates coals into six matters, which opens up different processing and conversion to each group of coal, and improves the value, value in use and environmental benefit of coal.

Description

technical field [0001] The invention relates to a separation process for separating all coal components by groups based on extraction and stripping methods, in particular to a mild process for group separation of all coal components. Background technique [0002] So far, coal has been commercially utilized in the form of burning coal as a whole, gasification, liquefaction or coking. Invention patent "Separation method of mild coal group components based on extraction and stripping", patent application number: 200710022120.1, created a new method for the commercial utilization of coal, the patent application is: adding mixed solvents to coal samples, Stir to obtain the extracted solid-liquid mixture; conduct solid-liquid separation on the extracted solid-liquid mixture to obtain the extract and raffinate respectively; wash the raffinate with water, and then dry it in vacuum to obtain raffinate coal; add solvent C to the extract , stirring, to obtain back-extracted solid-liqu...

Claims

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Application Information

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IPC IPC(8): C10L5/04B01D11/02
Inventor 秦志宏
Owner CHINA UNIV OF MINING & TECH
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