Method for preparing novel coal water slurry product from multiple materials

A technology for coal-water slurry and products, which is applied in the field of coal chemical industry, can solve the problems of poor stability, high energy consumption, uneven particle size distribution of coal-water slurry, etc., and achieves improved stability and atomization performance, optimized grading effect, and efficient cleaning. The effect of using

Active Publication Date: 2017-10-20
CCTEG CLEAN ENERGY CO LTD
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Problems solved by technology

[0008] However, the above-mentioned methods all have the problems of uneven particle size distribution, poor stability, high energy consumption, inability to adapt to gasification and fuel coal-water slurry, etc., and it is difficult to realize large-scale resource utilization of sludge and coal slime use

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  • Method for preparing novel coal water slurry product from multiple materials
  • Method for preparing novel coal water slurry product from multiple materials

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Experimental program
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Effect test

Embodiment 1

[0064] This embodiment provides a method for preparing a new type of coal-water slurry product with multiple raw materials. Among them, the raw coal is Fugu long-flame coal from Shaanxi, the sludge is municipal sludge from Shandong, and the coal slime is from a coal preparation plant in Shandong.

[0065] Among them, the water in the municipal sludge is 75wt%, containing 40ppm polyacrylamide; the coal slime full water M t 25.4wt%, analysis of water M ad 1.36wt%, Ash A ad 19.16wt%, volatile V daf 39.11wt%; long-flame coal full water M t 15.2wt%, analysis water M ad 9.14wt%, Ash A ad 15.12wt%, volatile V daf It is 36.37wt%. The maximum slurry concentration of long-flame coal in the traditional single-rod mill pulping process is 63%; the fluidity index test of coal slurry refers to the "cement slurry fluidity" in the industry standard "GB / T8077-2012 Concrete Admixture Homogeneity Test Method" of cement. "Test method, the result is 12cm; the index of the coal slurry stabil...

Embodiment 2

[0075] This embodiment provides a method for preparing a new type of coal-water slurry product with multiple raw materials. Among them, the raw coal is non-caking coal in Shenfu area, Shaanxi, and the sludge is sludge from a chemical plant in Anhui.

[0076] Among them, the water in the sludge is 90wt%, and the non-stick coal full water M t 10.6wt%, analytical water M ad 3.21wt%, Ash A ad 8.33wt%, volatile V daf It is 39.69wt%. The maximum slurry concentration of non-stick coal traditional ball mill pulping process is 65%; the fluidity index of coal slurry is 14cm; the index of coal slurry stability test is the water separation rate after standing for 8 hours, and the result is 15%.

[0077] The specific implementation method is:

[0078] (1) After the raw coal is crushed, a material A with a particle size of ≤3mm is obtained;

[0079] (2) Mix sludge with water and lignosulfonate at a ratio of 10:10:0.01. Among them, the dry basis of sludge is 1% of the dry basis of raw...

Embodiment 3

[0086] This embodiment provides a method for preparing a new type of coal-water slurry product with multiple raw materials. Among them, the raw coal is Fugu long-flame coal from Shaanxi, the sludge is municipal sludge from Shandong, and the coal slime is from a coal preparation plant in Shandong.

[0087] Among them, the water in municipal sludge is 75%wt%, and the whole water of coal slime M t 25.4wt%, analysis of water M ad 1.36wt%, Ash A ad 19.16wt%, volatile V daf 39.11wt%; long-flame coal full water M t 15.2wt%, analysis water M ad 9.14wt%, Ash A ad 15.12wt%, volatile V daf It is 36.37wt%. The maximum slurry concentration of long-flame coal in the traditional single-rod mill pulping process is 63%; the fluidity index test of coal slurry refers to the "cement slurry fluidity" in the industry standard "GB / T8077-2012 Concrete Admixture Homogeneity Test Method" of cement. "Test method, the result is 12cm; the index of the coal slurry stability test is the water separa...

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Abstract

The invention provides a method for preparing a novel coal water slurry product from multiple materials. The method includes the following steps: (1) after raw coal is crushed, a material A is obtained; (2) after being modified together, sludge, optional coal slime, water and additive then undergo strong shear treatment, so that a material B is obtained; (3) the material B is ultrafinely ground, so that a material C is obtained; (4) the material A, part of the material C, water and additive are shaped and roughly ground, so that a material D is obtained; (5) after being mixed, the material D and the remaining material C undergo strong shear, and thereby the coal water slurry product is obtained. The grain size distribution of the multi-material coal water slurry prepared by the preparation method is reasonable, and the novel coal water slurry product has good stability, flowability and good atomizing effect, and is also applicable to the preparation of fuel and gasified coal water slurry; in addition, the preparation method is easy to implement, energy consumption is low, and the problem on how to utilize sludge and coal slime on a large scale can be reasonably solved.

Description

technical field [0001] The invention belongs to the technical field of coal chemical industry and relates to the preparation technology of coal water slurry, in particular to a method for preparing a novel coal water slurry product with multiple raw materials. Background technique [0002] As an important biomass resource, sludge has the properties of high moisture content, high ash content, low calorific value, many hydrophilic functional groups on the surface, strong water holding capacity, and large volume. At present, landfill is the main treatment method for sludge in China, and the utilization rate of resource and energy is low, which causes serious pollution to the environment; although incineration reduces the amount significantly, the calorific value of sludge itself is low and cannot be directly burned. Coal slime mainly refers to the by-product of the coal washing process in the coal preparation plant, which is dehydrated by filter press and other equipment. It ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L1/32
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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