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Method for preparing coal water slurry

A technology of coal water slurry and raw coal, which is applied in the petroleum industry, liquid carbon-containing fuel, fuel, etc., can solve the problems of high process requirements and high transportation costs, and achieve the effects of expanding the selection range, good slurrying effect, and reducing transportation costs

Inactive Publication Date: 2015-04-29
广西梧州日成林产化工股份有限公司
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  • Summary
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method belongs to the intermittent wet pulping process, and some are continuous wet pulping processes. The characteristics of this process are that the coal type used is highly selective, the process requirements are high, and the close reading of the pulped products is generally ≤ 200 mesh (screening rate ≥ 90%), and moisture content ≥ 34%, high transportation cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] First, the raw coal is transported into the hopper by the elevator, and then the raw coal in the hopper is sent to the high-speed centrifugal airflow pulverizer with a quantitative feeder at a feeding speed of 1 T / H for pulverization until the pulverized coal fineness is 200 Purpose; The pulverized coal obtained is transported in the slurry mixing tank, then add water and additives, stir for 2 hours, then filter to obtain the finished product of coal water slurry; wherein, the mass ratio of pulverized coal, water and additives is 55: 42: 0.5.

Embodiment 2

[0018] First, the raw coal is transported into the hopper by the elevator, and then the raw coal in the hopper is sent into the high-speed centrifugal airflow pulverizer with a quantitative feeder at a feeding speed of 1.2 T / H for pulverization until the pulverized coal fineness is 250 Purpose; transport the obtained coal powder to the slurry mixing tank, then add water and additives, stir for 2.5 hours, and then filter to obtain the finished product of coal water slurry; wherein, the mass ratio of coal powder, water and additives is 58:45: 0.7.

Embodiment 3

[0020] First, the raw coal is transported into the hopper by the elevator, and then the raw coal in the hopper is sent to the high-speed centrifugal airflow pulverizer with a quantitative feeder at a feeding speed of 1.5 T / H for pulverization until the pulverized coal fineness is 300 Purpose: transport the obtained coal powder to the slurry mixing tank, then add water and additives, stir for 3 hours, then filter to obtain the finished coal water slurry; wherein, the mass ratio of coal powder, water and additives is 56:44: 0.6.

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Abstract

The invention discloses a method for preparing coal water slurry. The method comprises the following steps: A. conveying raw coal into a hopper by using a lifter at first, then conveying the raw coal in the hopper into a high-speed centrifugal jet mill by using a quantitative feeding machine for crushing, and crushing the raw coal to coal powder with fineness of 200-300 meshes; B. conveying the coal powder obtained in the step A by crushing into a dust collector by using a pipeline and a centrifugal fan in an air draft manner, and collecting the coal powder; and C. conveying the obtained coal powder into a slurrying stirring tank by using a feeding machine and a screw conveyor, adding water and additives, stirring for 2-3 hours, and filtering to obtain a finished product of coal water slurry. The fineness of the coal water slurry product prepared by the preparation method disclosed by the invention is larger than 200 meshes, the 200-mesh sieving rate is 100%, and the 300-mesh sieving rate is 60%.

Description

technical field [0001] The invention relates to the technical field of coal water slurry, in particular to a preparation method of coal water slurry. Background technique [0002] The traditional preparation process of coal water slurry is: raw coal → crushing → adding water, additives for ball (grinding) grinding slurry → filtering → finished product (coal water slurry). This method belongs to the intermittent wet pulping process, and some are continuous wet pulping processes. The characteristics of this process are that the coal type used is highly selective, the process requirements are high, and the close reading of the pulped products is generally ≤ 200 mesh (screening rate ≥ 90%), and moisture content ≥ 34%, high transportation costs. Contents of the invention [0003] The invention provides a method for preparing coal-water slurry. According to the method, the fineness of the slurry product obtained is greater than 200 mesh, and the sieving rate of 200 mesh reaches...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L1/32C10L1/24C10L1/198
Inventor 黄常活侯文彪林克忠李前孔令深
Owner 广西梧州日成林产化工股份有限公司
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