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Process for preparing coal water slurry from coal dust

A process method and coal powder preparation technology, applied in the direction of block/powder fuel preparation, combustion method, combustion equipment, etc., can solve the problems of restricting the promotion and use of coal-water slurry, high freight costs, and restricting the use of coal-water slurry. Achieve simple and fast operation, reduce transportation costs, and save costs

Inactive Publication Date: 2011-03-30
陈驰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its shortcoming is: a, freight is high
[0004] Because the current coal water slurry preparation technology has the above shortcomings, which limits the promotion and use of coal water slurry technology, especially limits the use of coal water slurry in medium and small user groups

Method used

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  • Process for preparing coal water slurry from coal dust
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Embodiment Construction

[0010] The process method of the present invention is as follows: firstly, the raw coal is crushed, and then dry-milled; the remaining coal particles after dry-grinding and fine-sieving are added with water for high-concentration fine-grinding, and mixed with the dry-milled fine-sieved coal powder; after that, a dispersant is added After kneading and stirring, it is made into a dry powder semi-finished product; after being transported to the user over a long distance, it is stirred with water; finally, after the pulp is filtered, the sundries are removed to make a coal water slurry product.

[0011] This process breaks the conventional practice of transporting the liquid coal-water slurry to the user from the coal-water slurry factory in the current market. The advantages are as follows: (1) It adopts the combination of dry and wet methods. On the other hand, it can make the semi-finished product of coal-water slurry contain a certain amount of water, which can avoid the hazard...

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Abstract

The invention relates to a process for preparing coal water slurry from coal dust, and belongs to the technical field of coal processing. The invention provides a process for preparing the coal water slurry from the coal dust for solving the problems. By the process, the conveying cost of the coal water slurry is reduced substantially, and size distribution is more reasonable simultaneously through the grading of wet-dry particles so as to achieve the accumulation efficiency as high as possible. The process of the invention comprises the following steps of: firstly, crushing raw coal and then performing dry grinding, adding water into residual coal granules subjected to dry grinding and fine screening to perform high-concentration fine grinding, and mixing with coal dust obtained by the dry grinding and the fine screening; secondly, adding a dispersing agent, kneading, mixing and stirring to prepare a dry powdery semifinished product, and after conveying to users for long distance, adding water and stirring; and finally, filtering the slurry and removing impurities to prepare a product of the coal water slurry.

Description

Technical field: [0001] The invention belongs to the technical field of coal processing, and more specifically relates to a process method for preparing coal-water slurry from coal powder; using this method can greatly reduce the transportation cost of coal-water slurry under the premise of safety, thereby becoming a national Many small and medium-sized coal-water slurry users who are far away from coal-water slurry plants and do not have the ability to build plants provide a practical way and provide a wider space for the further promotion of coal-water slurry. Background technique: [0002] CWS is a coal-based fluid fuel developed during the oil crisis in the 1970s. It is a mixture composed of about 70% coal powder, 30% water and a small amount of chemical additives, and about 2t or 2.5t of ordinary coal-water slurry replaces 1t of heavy oil. Because of its good fluidity and stability, coal-water slurry can realize fully sealed storage and transportation and high-efficien...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23K1/02
Inventor 陈驰
Owner 陈驰
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