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Coal slurry and preparation method thereof

A technology of coal slurry and nano slurry, which is applied in the petroleum industry, liquid carbon-containing fuel, fuel, etc., can solve the problem of low concentration of coal slurry, achieve the prospect of large-scale industrial application, high concentration of slurry, and high solid content Effect

Active Publication Date: 2014-03-19
EAST CHINA UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the defects in the prior art that the concentration of coal slurry is low, and it is not suitable for coal with a very low degree of coalification such as lignite to make coal slurry, or the raw material lignite for making coal slurry needs complicated pretreatment, it provides A kind of coal slurry with high slurry concentration, very beneficial to pumping, storage and transportation, easy to atomize, burn and gasify and its preparation method

Method used

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  • Coal slurry and preparation method thereof
  • Coal slurry and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0030] 1. Raw materials

[0031] (1) Lignite, the specific composition is shown in the table below.

[0032]

[0033] (2) Dispersant: sodium naphthalenesulfonate

[0034] (3) Non-polar solvent: kerosene

[0035] (4) Nano powder: nano calcium carbonate, diameter 50nm

[0036] (5) water

[0037] 2. Preparation conditions

[0038] (1) Raw material ratio, weight fraction. 153 parts by weight of lignite (after drying, remove free water in coal), 118 parts by weight of water, 1.5 parts by weight of dispersant, 0.75 parts by weight of non-polar solvent, 0.15 parts by weight of nano Powder.

[0039] (2) Preparation method. First, the non-polar solvent is divided into B solvent and C solvent in two parts (the mass ratio of B solvent and C solvent is 1:1), B solvent is added to the pulverized lignite, and stirred for 30 minutes to make the surface of lignite particles become It is hydrophobic; C solvent is added to nano-powder, and stirred for 30 minutes to form a nano-slurry...

Embodiment 2

[0048] 1. Raw materials

[0049] (1) Lignite, the specific composition is shown in the table below.

[0050]

[0051] (2) Dispersant: sodium naphthalenesulfonate

[0052] (3) Non-polar solvent: kerosene

[0053] (4) water

[0054] 2. Preparation conditions

[0055] (1) Raw material ratio, weight fraction. 147 parts by weight of lignite (after drying), 118 parts by weight of water, 1.5 parts by weight of dispersant, and 0.75 parts by weight of non-polar solvent.

[0056] (2) Preparation method. First, the non-polar solvent is added to the pulverized lignite and stirred for 30 minutes to make the surface of the lignite particles hydrophobic to form a modified oil-coal slurry; the modified oil-coal slurry, water and dispersant mixing to form a raw material mixture; finally, the raw material mixture was stirred for 60 minutes to obtain the slurry.

[0057]3. Product performance indicators

[0058] (1) Appearance shape: gray-black paste. At 25 degrees Celsius, the appar...

Embodiment 3

[0065] 1. Raw materials

[0066] (1) Bituminous coal, the specific composition is shown in the table below.

[0067]

[0068] (2) Dispersant: sodium naphthalenesulfonate

[0069] (3) Non-polar solvent: kerosene

[0070] (4) Nano powder: nano calcium carbonate, diameter 50nm

[0071] (5) water

[0072] 2. Preparation conditions

[0073] (1) Raw material ratio, weight fraction. 213 parts by weight of bituminous coal (after drying), 118 parts by weight of water, 1.5 parts by weight of dispersant, 0.75 parts by weight of non-polar solvent, and 0.15 parts by weight of nanometer powder.

[0074] (2) Preparation method. First, divide the non-polar solvent into B solvent and C solvent (the mass ratio of B solvent and C solvent is 1:1), B solvent is added to the pulverized bituminous coal, and stirred for 20 minutes to make the surface of the bituminous coal particles change. It is hydrophobic; C solvent is added to nanopowder, and stirred for 20 minutes to form a nanoslurry;...

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Abstract

The invention discloses coal slurry and a preparation method thereof. The coal slurry comprises the following components: 100-300 parts by weight of coal, 50-200 parts by weight of water, 0.01-3 parts by weight of dispersant and 0.01-3 parts by weight of nonpolar solvent, wherein the mass ratio of the nonpolar solvent to the coal is less than or equal to 1%. The preparation method comprises the following steps: evenly mixing the nonpolar solvent with the coal to obtain a material A; and then evenly mixing the material A with water and the dispersant to obtain the coal slurry. The coal slurry prepared by the preparation method disclosed by the invention is high in slurrying concentration, high in solid content and low in viscosity; the coal slurry can be burnt or gasified as a fuel; the coal slurry is advantageous for pumping, storage and transportation, and easy to atomize, burn and gasify.

Description

technical field [0001] The invention relates to a coal slurry and a preparation method thereof. Background technique [0002] Coal water slurry is a widely used slurry fuel, which can be used in power station boilers, industrial boilers, industrial kilns and coal gasification furnaces to replace oil, gas and coal. It is an important part of today's clean coal technology. The higher the concentration (solid content) of coal slurry, the more favorable it is for its combustion and gasification. Therefore, under the premise of meeting the requirements of viscosity, etc., the higher the concentration of the prepared coal slurry, the higher the economic benefits. Coal-water slurry entrained bed gasification technology is the mainstream of large-scale coal gasification technology at present, and represents the development direction of coal gasification technology in the future. [0003] At present, the existing coal-water slurry entrained bed gasification technology mostly relies...

Claims

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Application Information

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IPC IPC(8): C10L1/32C10L1/24C10L1/12C10L1/188C10L1/192
Inventor 刘海峰赵辉李伟锋龚欣王辅臣于广锁王亦飞徐梦涵许建良李伟东梁钦锋周志杰代正华陈雪莉郭晓镭王兴军郭庆华刘霞陆海峰李超龚岩王立
Owner EAST CHINA UNIV OF SCI & TECH
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