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Novel coal water slurry preparation method and coal water slurry prepared by using same

A technology of coal-water slurry and slurry, which is applied in the field of coal chemical industry to achieve the effects of reducing production costs, improving gasification efficiency, and reducing energy consumption

Active Publication Date: 2016-08-24
CCTEG CLEAN ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, the above-mentioned coal-water slurry concentration and stacking efficiency need to be further improved, so as to be better used for fuel coal-water slurry and gasification coal-water slurry

Method used

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  • Novel coal water slurry preparation method and coal water slurry prepared by using same

Examples

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Effect test

Embodiment 1

[0062] A method for preparing fuel coal-water slurry from Shenfu coal. Shenfu coal is a common low-rank coal in Shaanxi area. The analytical water is 5.9%, the total water is 12.8%, and the ash content is 19.9%.

[0063] The method comprises the steps of:

[0064] (1) crushing Shenfu coal to coal powder with a particle size less than 13mm to obtain the first slurry;

[0065] (2) mixing the first slurry with water and additives according to the mass ratio of 92:8:0.3 and kneading to obtain the second slurry with a concentration of 80.8wt%;

[0066] (3) Reshaping the second slurry, as a fuel coal-water slurry, the maximum particle size is less than 0.5mm, and the material less than 75 μm accounts for more than 75% of the total material, and the third slurry having a concentration of 68.2wt% is obtained;

[0067] (4) After the third slurry is removed by an 8-mesh sieve and sheared under a shear force of 110r / s, the fourth slurry having a concentration of 65.5wt% is obtained;

...

Embodiment 2

[0071] A method for preparing gasified coal-water slurry from lignite, which is a common low-rank coal in the Hailaer area of ​​Inner Mongolia, has an analytical water content of 12.5%, a total water content of 25%, and an ash content of 19.9%.

[0072] The method comprises the steps of:

[0073] (1) crushing lignite to pulverized coal with a particle size less than 13 mm to obtain the first slurry;

[0074] (2) mixing the first slurry with water and additives according to the mass ratio of 95:5:0.3 and kneading to obtain the second slurry with a concentration of 70.8wt%;

[0075] (3) Reshaping the second slurry, as a gasified coal-water slurry, the maximum particle size is 2.4mm, and the material less than 75 μm accounts for more than 40% of the total material, and the third slurry having a concentration of 59.8wt% is obtained;

[0076] (4) After the third slurry is removed by a 14-mesh sieve and sheared under a shear force of 80r / s, the fourth slurry with a concentration of...

Embodiment 3

[0080] A method for preparing gasified coal-water slurry from Xinjiang Hongshan coal. Xinjiang Hongshan coal is a common low-rank coal in the Zhungeer area of ​​Xinjiang. The analyzed water is 9.7%, the total water is 18.5%, and the ash content is 12.9%. The particle size is less than 50mm.

[0081] The method comprises the steps of:

[0082] (1) crushing Xinjiang coal to coal powder with a particle size less than 13mm to obtain the first slurry;

[0083] (2) kneading after mixing the first slurry with water and additives according to the mass ratio of 91:9:0.3 to obtain the second slurry with a concentration of 74.3wt%;

[0084] (3) Reshaping the second slurry as a gasified coal-water slurry with a maximum particle size of 2.4mm, and materials less than 75 μm accounted for more than 40% of the total material to obtain a third slurry with a concentration of 63.5wt%;

[0085] (4) After the third slurry is removed by a 14-mesh sieve and sheared under a shear force of 90r / s, th...

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Abstract

The invention provides a novel coal water slurry preparation method and coal water slurry prepared by using the same. The novel coal water slurry preparation method comprises steps of kneading, mixing, shaping, screening, shearing, superfine grinding and shaping fine grinding, so that the grain size distribution of the prepared coal water slurry is reasonable, gaps of coal powder can be effectively filled, the slurry concentration is increased, the concentration can be up to 65.5wt%, the coal powder granularity of the coal water slurry is uniform, the average particle size is 50-150mu m, and the prepared coal water slurry can be used as fuel coal water slurry and gasified coal water slurry; moreover, by adopting the novel coal water slurry preparation method, the energy consumption of slurry preparation is effectively reduced, and due to a continuous production process, continuous, stable and low-consumption production requirements on preparation of the fuel coal water slurry and the gasified coal water slurry can be met.

Description

technical field [0001] The invention belongs to the technical field of coal chemical industry, and relates to a novel preparation method of coal-water slurry and the prepared coal-water slurry, in particular to a method for preparing coal-water slurry by using low-rank coal. Background technique [0002] In recent years, the demand for energy has been rising, forcing people to constantly seek new energy. Many scholars direct their attention to the field of combustion and gasification of CWS. A typical CWS contains 60-75% coal, 25-40% water and 1% chemical additives. The raw coal in the coal water slurry has been processed through multiple processes, and the sulfur content and ash content have been reduced. However, the properties of CWS are affected by variables such as coal properties, particle size and distribution, type and amount of chemical additives, method of preparing CWS and rheological effects, etc. [0003] Coal water slurry has similar fluidity to heavy oil, s...

Claims

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Application Information

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IPC IPC(8): C10L1/32
CPCC10L1/326C10L2290/24C10L2290/28
Inventor 何国锋段清兵吕向阳张胜局王冉
Owner CCTEG CLEAN ENERGY CO LTD
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