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Method for producing ash-free coal

A manufacturing method and technology for ash-free coal, which are applied in the petroleum industry, solid fuels, fuels, etc., can solve problems such as difficulty in mixing and caking coal, and achieve the effect of improving separation efficiency

Active Publication Date: 2018-09-11
KOBE STEEL LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, for example, when producing ashless coal in the coal production area, there is no room for widely selecting the coal type of the raw material (coal)
That is, when producing ashless coal, as described in Patent Document 1, it is difficult to mix caking coal with coal combustion

Method used

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  • Method for producing ash-free coal
  • Method for producing ash-free coal
  • Method for producing ash-free coal

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no. 1 approach

[0021] Such as figure 1 As shown, the ashless coal manufacturing facility 100 is equipped with the following in order from the upstream side of the ashless coal (HPC) manufacturing process: a coal hopper 1, a solvent tank 2, a slurry preparation tank 3, a transfer pump 4, and a preheater 5 , Extraction tank 6, gravity settling tank 7, filter device 8, and solvent separator 9·10.

[0022] Here, the method for producing ash-free coal according to this embodiment includes a particle size adjustment step, an extraction step, a separation step, an ash-free coal acquisition step, and a by-product coal acquisition step. Hereinafter, each step will be described. In addition, in this production method, the coal used as a raw material is not particularly limited, and bituminous coal with a high extraction rate (the ratio of the soluble content of the coal extracted by the solvent) can be used, and cheaper low-quality coal (sub-bituminous coal, lignite). In addition, the term "ashless...

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Abstract

Provided is a method for manufacturing ashless coal capable of cheaply and very efficiently manufacturing ashless coal from which the ash portion has been adequately removed, even when manufacturing ashless coal in, for example, a coal producing region having little leeway for selecting the type of raw material (coal). A method for manufacturing ashless coal comprising: an extraction step for heating a slurry obtained by mixing coal and a solvent, and extracting the coal components soluble in the solvent; a separation step for separating the slurry obtained in the extraction step into a liquid solution including the coal components soluble in the solvent, and a solid-concentrate liquid in which the coal components not soluble in the solvent are concentrated; and an ashless-coal acquisition step for evaporatively separating the solvent from the liquid solution separated in the separation step to obtain ashless coal. This method for manufacturing ashless coal improves the cohesion of the coal components not soluble in the solvent by using coal of a prescribed particle size to perform the extraction step.

Description

technical field [0001] The present invention relates to a method for producing ash-free coal for obtaining ash-free coal from which ash has been removed. Background technique [0002] As a method for producing ash-free coal, there is a method described in Patent Document 1, for example. The method for producing ashless coal described in Patent Document 1 comprises: mixing coal with a solvent to prepare a slurry, heating the obtained slurry to extract coal components soluble in the solvent, and extracting the slurry from which the coal components have been extracted, A method of obtaining ash-free coal by separating the solvent from the separated solution portion after separating into a solution portion containing a coal component soluble in a solvent and a non-solution portion containing a coal component insoluble in a solvent. The method for producing ashless coal described in Patent Document 1 is characterized in that when the gravity sedimentation method is used in the s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10L5/00
CPCC10L5/04C10L9/00C10L2290/06C10L2290/12C10L2290/24C10L2290/544
Inventor 堺康尔奥山宪幸吉田拓也木下繁
Owner KOBE STEEL LTD
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