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Preparation method for coal water slurry used for gasification

A technology of coal water slurry and coal slurry, which is applied in the field of clean coal, can solve the problem that coal slime is difficult to realize long-distance clean utilization, and achieve the effect of improving economy

Inactive Publication Date: 2016-11-09
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The main purpose of the present invention is to provide a method for preparing coal slurry for gasification, so as to solve the problem in the prior art that it is difficult to realize long-distance clean utilization of coal slurry

Method used

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  • Preparation method for coal water slurry used for gasification

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preparation example Construction

[0021] As mentioned in the background technology section, although most of the utilization methods of fine coal slime in the prior art are prepared into coal water slurry for clean utilization, they are basically on-site utilization or short-distance utilization of coal slime, and it is difficult to Realize long-distance transportation or storage of coal slime, and then realize long-distance clean utilization. In order to improve this defect in the prior art, in a typical implementation of the present application, a method for preparing coal slurry for gasification is provided. The preparation method includes: step S1, diluting the coal slurry with water to obtain Coal slurry; Step S2, adding coal and water to the coal slurry to mix to obtain a mixed coal slurry; Step S3, grinding the mixed coal slurry to obtain gasification water-based coal slurry.

[0022] In the above preparation method of the present application, the coal slime is diluted with water to prepare a coal slurr...

Embodiment 1

[0034] as attached figure 1As shown, the coal slime 01 from the coal washing plant with a water content of 26% and a particle size of 80% less than 0.5mm is sent to the agitator 04 through the belt 11, and is stirred together with the water in the water tank 02 and the additive 03 (lignin), and the average stirring The time is 15 minutes, and the concentration of the coal slurry after stirring is 50%.

[0035] The stirred coal slurry enters the storage tank 05 through the first delivery pipeline 12 . Then use the coal slurry pump 06 to send the coal slurry in the storage tank 05 into the wet rod mill 08 through the second delivery pipeline 13, and the length of the second delivery pipeline 13 is 2 km. The coal slurry transported into the rod mill 08 is ground together with the coal from the coal bunker 07 and the water in the water tank 02, and finally the coal water slurry with a concentration of 61% is sent into the coal water slurry gas through the third delivery pipeline ...

Embodiment 2

[0037] as attached figure 1 As shown, the coal slime 01 from the coal washing plant with a water content of 31% and a particle size of 95% less than 1mm is sent to the agitator 04 through the belt 11, and is stirred together with the water in the water tank 02. The average stirring time is 20 minutes, and the coal slurry concentration after stirring is 40%.

[0038] The stirred coal slurry enters the storage tank 05 through the first delivery pipeline 12 . Then use the coal slurry pump 06 to drive the coal slurry in the storage tank 05 into the wet rod mill 08 through the second delivery pipeline 13, and the length of the second delivery pipeline 13 is 500 km. The coal slurry sent into the rod mill 08 is ground together with the coal from the coal bunker 07 and the water in the water tank 02, and finally the coal water slurry with a concentration of 60% is sent to the gasifier 09.

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Abstract

The invention provides a preparation method for coal water slurry used for gasification. The preparation method comprises the following steps: step S1, adding water to dilute slime so as to obtain coal slime; step S2, adding coal and water into the coal slime and carrying out mixing so as to obtain mixed coal slurry; and step S3, grinding the mixed coal slurry so as to obtain the coal water slurry for gasification. According to the invention, the slime is diluted with water to prepare the coal slime, which facilitates transportation; then coal and water are added and mixing is carried out so as to prepare the mixed coal slurry; and the coal water slurry for gasification is eventually obtained through grinding. The method prepares the coal water slurry for gasification with an appropriate concentration through dilution at first and supplementation of coal to adjust coal concentration of a product next, so transport of slime according to needs of practical utilization distance is realized, the coal water slurry for gasification with a high combustion value is prepared, and the economic performance of utilization of slime is improved.

Description

technical field [0001] The invention relates to the technical field of clean coal, in particular to a method for preparing coal slurry for gasification. Background technique [0002] With the rapid development of my country's economy in recent decades, my country's coal production and consumption have leapt to the first place in the world. Coal slime is a kind of waste in the coal washing process, and the output is about 10% to 20% of the raw coal washed. In recent years, with the continuous increase of the selection ratio of raw coal in my country and the transformation of coal mining methods, the output of coal slime has also increased significantly. Coal slime is difficult to store and transport because of its fine particles, high moisture content and high viscosity. It will be lost when exposed to water, and will fly when air-dried. It is one of the main sources of pollution in mining areas. How to efficiently utilize coal slime resources and at the same time solve the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L1/32C10L1/24
CPCC10L1/326C10L1/2437C10L2200/04C10L2290/08C10L2290/28C10L2300/20
Inventor 任海君王立志李水弟赵代胜王进孙卫军
Owner CHNA ENERGY INVESTMENT CORP LTD
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