A kind of coal water slurry and preparation method thereof

A technology of coal-water slurry and slurry, which is applied in the field of coal chemical industry to achieve the effect of filling the accumulation space, saving space, and low-consumption production requirements

Active Publication Date: 2019-07-23
CCTEG CLEAN ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 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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  • A kind of coal water slurry and preparation method thereof
  • A kind of coal water slurry and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A kind of coal water slurry, it is prepared by following steps:

[0042] 1) crushing Shenfu coal to obtain coal powder with a particle size less than 5mm, mixing 60wt% of coal powder with water and naphthalenesulfonic acid formaldehyde condensate according to a mass ratio of 70:30:0.1 to obtain the first slurry; The remaining coal powder is mixed with naphthalenesulfonic acid formaldehyde condensate and water according to the mass ratio of 90:10:0.5 to obtain the second slurry;

[0043] 2) Shaping and finely grinding the second slurry to obtain a third slurry with a particle size of 16-20 μm, mixing the first slurry with 5wt% of the third slurry for shaping and coarse grinding to obtain a fourth slurry with a particle size of 75~90μm;

[0044] 3) mixing the fourth slurry with the remaining third slurry, and performing high shear at a rate of 80r / min to obtain the fifth slurry;

[0045] 4) The fifth slurry is output to obtain coal water slurry.

[0046] The concentrat...

Embodiment 2

[0048] A kind of coal water slurry, it is prepared by following steps:

[0049] 1) crushing Yulin coal in Shaanxi to obtain coal powder with a particle size less than 5mm, mixing 99wt% of coal powder with water and humate according to a mass ratio of 90:10:1 to obtain the first slurry; The powder is mixed with naphthalenesulfonic acid formaldehyde condensate and water according to the mass ratio of 70:30:1 to obtain the second slurry;

[0050] 2) Shaping and finely grinding the second slurry to obtain a third slurry with a particle size of 5-10 μm, mixing the first slurry with 40 wt% of the third slurry for shaping and coarse grinding to obtain a fourth slurry with a particle size of 35~50μm;

[0051] 3) Mix the fourth slurry with the remaining third slurry, and perform high shear at a rate of 150r / min to obtain the fifth slurry; 5wt% of the fifth slurry is returned to step 2) for shaping and fine grinding;

[0052] 4) The remaining fifth slurry is exported to obtain coal wa...

Embodiment 3

[0055] A kind of coal water slurry, it is prepared by following steps:

[0056] 1) crushing Shenfu coal to obtain coal powder with a particle size of less than 5mm, mixing 60wt% of coal powder with water and lignosulfonate according to a mass ratio of 75:25:0.5 to obtain the first slurry; The pulverized coal is mixed with lignin sulfonate and water according to the mass ratio of 70:30:0.5 to obtain the second slurry;

[0057] 2) Shaping and finely grinding the second slurry to obtain the third slurry with a particle size of 10-15 μm, mixing the first slurry with 30 wt% of the third slurry for shaping and coarse grinding to obtain the fourth slurry with a particle size of 50~60μm;

[0058] 3) Mix the fourth slurry with the remaining third slurry, and perform high shear at a rate of 100r / min to obtain the fifth slurry; 40wt% of the fifth slurry is returned to step 2) for shaping and fine grinding;

[0059] 4) The remaining fifth slurry is exported to obtain coal water slurry. ...

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Abstract

The invention relates to a preparation method of coal water slurry, which includes the steps of: 1) crushing a coal raw material to obtain coal powder, mixing a part of the coal powder with an additive and water to obtain first slurry, and mixing the rest of the coal powder with an additive and water to obtain second slurry; 2) performing shaping and fine-grinding to the second slurry to obtain third slurry, and mixing the first slurry with a part of the third slurry and performing shaping and coarse-grinding to obtain fourth slurry; 3) mixing the fourth slurry with the rest of the third slurry and performing high-speed shearing to obtain fifth slurry; 4) outputting the fifth slurry to prepare the coal water slurry. The coal water slurry produced through the continuous production process is 30-80 [mu]m in average particle size and has reasonable particle size gradation, so that gaps can be effectively filled and stacking efficiency is increased. The slurry concentration of the product can reach more than 62.2 wt%, and energy consumption and production cost of the coal water slurry are effectively reduced.

Description

technical field [0001] The invention relates to the technical field of coal chemical industry, and relates to a coal-water slurry and a preparation method thereof. Background technique [0002] Coal water slurry is a new type of coal-based fluid fuel, a national high-tech product and a key product for environmental protection promotion. It is processed by mixing a certain proportion of coal, water and chemical additives. It has the advantages of high concentration, fine particle size, good rheology, high combustion efficiency, large load adjustment range, environmental protection, energy saving, safety and high efficiency. It is a realistic clean coal technology in my country at present. [0003] Coal water slurry is a new coal product developed after the world oil crisis in the late 1970s. It is a new type of clean fuel that can replace heavy oil and coal. In various industrial applications, coal water slurry has a combustion efficiency of more than 99%, which is twice th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10L1/32
CPCC10L1/326C10L2290/28
Inventor 何国锋段清兵吕向阳张胜局王冉柳金秋
Owner CCTEG CLEAN ENERGY CO LTD
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