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Method for preparing high-concentration water-coal-slurry through coal with high oxygen content

A high-concentration water and oxygen content technology, applied in the direction of liquid carbon-containing fuel, petroleum industry, fuel, etc., can solve the problem that the high-concentration coal-water slurry technology has not made breakthrough progress, and achieve good fluidity and stability, The effect of reducing pulping cost and using less

Active Publication Date: 2014-07-23
WUHUAN ENG
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] For a long time, no breakthrough has been made in the technology of preparing high-concentration coal-water slurry from high-oxygen coal

Method used

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  • Method for preparing high-concentration water-coal-slurry through coal with high oxygen content
  • Method for preparing high-concentration water-coal-slurry through coal with high oxygen content
  • Method for preparing high-concentration water-coal-slurry through coal with high oxygen content

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Embodiment

[0025] The amount of coal sample is about 3kg, pre-crushed to less than 10mm, and then finely crushed to less than 3mm with a roller crusher, and the finely crushed coal sample is evenly spread on the tray, and placed in a constant temperature blast drying oven at 105°C-110°C The drying time is 10-14 hours, and the moisture content of the dried high-oxygen coal is not more than 2%. The dried coal sample is prepared by grinding coal with a ball mill. The diameter ratio of the steel balls is 20mm, 12mm and 5mm, and the mass ratio is 20%:50%:30%. The speed of the ball mill is set at 150-200r / min. Coal grinding time 5-10min. Coal samples are screened with 40-mesh and 200-mesh sieves, and the coal with a particle size of 40 mesh to 200 mesh (coarse) and less than 200 mesh (fine) is classified according to the mass ratio of (4-6): (6-4) Then add water and additives (ZM-19 high-efficiency coal-water slurry additive, the dosage is 0.3% of the dry basis coal, wt) and mix evenly, and t...

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Abstract

The invention relates to a method for preparing high-concentration water-coal-slurry through coal with high oxygen content. The problem that high-concentration water-coal-slurry is difficultly prepared in conventional coal with high oxygen content is solved. According to the technical scheme, the method comprises the following steps: finely grinding and screening the coal with high oxygen content, grading according to a weight ratio of (4-6):(6-4) of high oxygen content coal with the granularity of 40-200 meshes to high oxygen content coal with the granularity of less than 200 meshes, adding a water-coal-slurry additive and water, uniformly stirring and mixing, and preparing the high-concentration water-coal-slurry with the concentration of over 60 percent. The method is simple in process, high in slurry property and high in concentration and is particularly suitable for preparing the high-concentration water-coal-slurry through the coal with high oxygen content.

Description

technical field [0001] The invention discloses a method for preparing coal-water slurry, in particular to a method for preparing high-concentration coal-water slurry from coal with high oxygen content. Background technique [0002] Coal water slurry is a new type of coal-based fluid clean fuel developed with the international oil crisis in the 1970s. It is a fluid mixed with coal powder, water and additives. Like heavy oil, it can be transported as a fluid , storage, and participate in chemical reactions in the gasifier to produce syngas. [0003] Coal water slurry gasification technology has: wide source of raw materials, stable coal slurry performance, easy to pump; mature and reliable technology, with several sets of process equipment for many years of operation experience, easy to large-scale, large-scale, easy to realize automatic control and cleaning production; the gasification pressure is high, which can save the compression work of the syngas; there is no transmiss...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L1/32
Inventor 曾凡虎陈钢夏吴杨建国李泽海李清陈风敬卢文新
Owner WUHUAN ENG
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