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Method for preparing water coal slurry

A technology of coal water slurry and slurry storage, which is applied in the direction of combustion methods, block/powder fuel preparation, combustion equipment, etc., to achieve the effects of reducing energy consumption, high efficiency, and reducing investment

Inactive Publication Date: 2011-03-16
JIANGYIN DONGFA MACHINERY MFG
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003]The historical lessons of severe air pollution caused by traditional coal burning cannot be repeated

Method used

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  • Method for preparing water coal slurry
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  • Method for preparing water coal slurry

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Embodiment Construction

[0019] 1. The first preparation method of coal-water slurry, raw coal is crushed, buffer bin, feeder to the first ball mill, the first ball mill controls more than 90% of the ground particles to pass through a 325 mesh screen, and the first ball mill 20% of the weight of the discharged material is passed through the second ball milling, and the particles are ground to more than 90% and pass through a 600-mesh sieve. Or after mixing, it is subjected to high shear treatment, slag screening, slurry mixing, and slurry storage to obtain coal-water slurry. The solids content of the blended coal was increased to 65%.

[0020] 2. The second preparation method of coal-water slurry, raw coal is crushed, buffer bin, feeder to the first ball mill, the first ball mill controls more than 90% of the ground particles to pass through a 400-mesh sieve, and the first ball mill 30% of the weight of the discharged material is passed through the second rod mill, and the particles are ground to mor...

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Abstract

The invention discloses a method for preparing water coal slurry, which comprises the following steps of: crushing raw material coal, conveying the crushed coal to a first mill through a surge bin and a feeder, controlling over 90 percent of milled granules to pass through a sieve with fineness of over 325 meshes in the first mill, conveying 20 to 30 percent of the weight of the discharged material of the first mill to a second mill, milling the discharged material till over 90 percent of granules can pass through a sieve of 500 to 600 meshes, mixing the materials in the second mill, then performing high shearing treatment, screening the slag, and regulating and storing the slurry to obtain the water coal slurry. The coal content of the conventional water coal slurry is improved to about 65 to 67 percent from about 60 percent so that the integral heat value is improved by 6 to 8 percent. The method can improve the coal milling process and has simple flow and compact layout.

Description

Technical field [0001] The present invention involves the preparation process of coal slurry. Background technique [0002] The existing coal slurry is made of about 60%of coal, 39%of water and a small amount of chemical additives. It is a kind of slurry fuel that can pump, atomize, storage and stable burning like oil.Half of the fuel oil can replace fuel oil for boilers, power stations, industrial furnaces and kiln and civilian heating. It is used to replace coal fuel. It has high combustion benefits, convenient load adjustment, reducing environmental pollution, improving labor conditions and saving savingThe advantages of coal use, enterprises have achieved good economic benefits.Therefore, water coal slurry technology can be used not only for oil generation, but also for agency coal, but also has energy saving and environmental protection benefits.However, the improvement of solid capacity under the conditions of stability and pump flow is still an important aspect of improve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L1/32F23K1/02
Inventor 姜丽琴钟小明陆浩良
Owner JIANGYIN DONGFA MACHINERY MFG
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