Preparation method of coal water slurry

A coal-water slurry and slurry technology, which is applied in the petroleum industry, liquid carbon-containing fuel, fuel additives, etc., can solve the problems of increasing storage and transportation difficulties and production costs, low quality of coal-water slurry products, and thermodynamic instability. , to achieve the effect of changing interfacial tension and hydrophilic and hydrophobic properties, increasing storage stability and superior performance

Active Publication Date: 2017-12-22
JIANGSU TIANMAI CHEM CO LTD
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  • Claims
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AI Technical Summary

Problems solved by technology

[0003] Because the surface of coal particles is non-polar, even if the coal particles are finely ground, they cannot be stably dispersed in polar water, which belongs to a thermodynamically unstable system, which makes the existing coal-water slurry products low in quality and poor in stability, resulting in Gasification efficiency is low, increasing the difficulty of storage and transportation and production costs

Method used

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  • Preparation method of coal water slurry

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1) Crushing and coarsely grinding the raw coal to obtain the first pulverized coal with an average particle size of 200 µm, mixing the first pulverized coal and water at a mass ratio of 3.5:1, adding 1 wt% of the total mass The first additive is mixed by a planetary mixer to obtain the first slurry;

[0031] 2) Finely grind the first pulverized coal to obtain the second pulverized coal with an average particle size of 100µm, mix the second pulverized coal with water at a mass ratio of 3:1, add 1.5% of the total mass The second additive of wt%, is mixed homogeneously through planetary mixer, obtains the second slurry;

[0032] 3) Secondary fine grinding of the second pulverized coal to obtain the third pulverized coal with an average particle size of 20µm, mixing the third pulverized coal with water at a ratio of 2:1, adding 2wt of the total mass % of the third additive, mixed uniformly through a planetary mixer, to obtain the third slurry;

[0033] 4) Ultrafine grindi...

Embodiment 2

[0037] 1) Crushing and coarsely grinding the raw coal to obtain the first pulverized coal with an average particle size of 300 µm, mixing the first pulverized coal and water at a mass ratio of 5:1, adding 1 wt% of the total mass The first additive is mixed by a planetary mixer to obtain the first slurry;

[0038] 2) Finely grind the first pulverized coal to obtain the second pulverized coal with an average particle size of 50µm, mix the second pulverized coal with water at a mass ratio of 4:1, and add 2wt of the total mass % of the second additive, mixed uniformly through a planetary mixer, to obtain the second slurry;

[0039] 3) The second pulverized coal is finely ground for the second time to obtain the third pulverized coal with an average particle size of 30µm, and the third pulverized coal and water are mixed in a ratio of 2:1, and 3wt of the total mass is added % of the third additive, mixed uniformly through a planetary mixer, to obtain the third slurry;

[0040] 4)...

Embodiment 3

[0044] 1) Crushing and coarsely grinding the raw coal to obtain the first pulverized coal with an average particle size of 150 µm, mixing the first pulverized coal and water at a mass ratio of 3:1, adding 1 wt% of the total mass The first additive is mixed by a planetary mixer to obtain the first slurry;

[0045] 2) Finely grind the first pulverized coal to obtain the second pulverized coal with an average particle size of 50µm, mix the second pulverized coal with water at a mass ratio of 2:1, and add 1wt of the total mass % of the second additive, mixed uniformly through a planetary mixer, to obtain the second slurry;

[0046] 3) The second pulverized coal is finely ground for the second time to obtain the third pulverized coal with an average particle size of 15µm, and the third pulverized coal is mixed with water in a ratio of 1:1, adding 1wt of the total mass % of the third additive, mixed uniformly through a planetary mixer, to obtain the third slurry;

[0047] 4) Ultra...

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Abstract

The invention provides a preparation method of coal water slurry. The preparation method has the advantages that the ratio of all levels of particles with average particle sizes in the coal water slurry is strictly controlled through graded crushing, fine grinding and superfine grinding, so that the granularity gradation of the prepared coal water slurry is reasonable, the gap in the coal powder is effectively filled, and the concentration of the finished coal water slurry is improved; in the preparation process of the coal water slurry, the different additives are added according to different particle sizes in different types of slurry in different steps, so as to improve the stability of the finished coal water slurry; the different types of slurry are respectively performed with fine grinding and superfine grinding, and then are mixed, so that the distribution of all levels of particles with granularity in the slurry is effectively controlled, the energy consumption in the coal water slurry preparation process is effectively reduced, and the production requirements of stability and low consumption of the coal water slurry of the fuel are met.

Description

technical field [0001] The invention relates to a preparation method of coal-water slurry, in particular to a preparation method of accurately graded particle size distribution and good stability of coal-water slurry. Background technique [0002] Energy has always been the basis for the progress and development of human society. With the development of the world economy and society, the world's energy demand will continue to increase in the future. China is a big country in energy production and consumption, and energy plays an absolutely important role in the development of the national economy. In recent years, the increasing demand for energy has forced people to continuously seek new energy sources. Many scholars have directly focused their attention on the field of combustion and gasification of coal-water slurry. A typical coal water slurry contains 70% coal, 30% water and 1% chemical additives. It is a clean fuel with high combustion efficiency, low pollution and l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L1/32C10L1/10C10L1/12C10L1/185C10L1/192C10L1/195C10L1/236C10L1/24C10L1/28
CPCC10L1/10C10L1/1233C10L1/1283C10L1/1852C10L1/192C10L1/1955C10L1/2364C10L1/2437C10L1/2462C10L1/28C10L1/326C10L2300/20
Inventor 周小虎朱红进
Owner JIANGSU TIANMAI CHEM CO LTD
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