Ultrafine coal water slurry preparation method

A coal slurry and fine water technology, applied in the petroleum industry, liquid carbon-containing fuel, fuel, etc., can solve problems such as lag, increase system energy consumption and enterprise production costs, limit the promotion and application of coal water slurry technology, and achieve adjustment range big effect

Inactive Publication Date: 2015-12-16
CCTEG CLEAN ENERGY CO LTD
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AI Technical Summary

Problems solved by technology

[0003] With the expansion of the range of raw materials for pulping, the innovation of the original pulping technology is relatively lagging behind. The particle size of the coal water slurry is still pulped according to the original particle size requirements (average particle size is about 45 μm), and it is not specific for each raw material.

Method used

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  • Ultrafine coal water slurry preparation method

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Embodiment 1

[0039] A method for preparing ultra-fine coal-water slurry from low-rank coal in the Ordos area, the low-rank coal in the Ordos area, the analysis water is 6.5%, the total water is 15%, the ash content is 7.5%, and the particle size is less than 50mm; the method Including the following steps:

[0040] (1) crushing the low-rank coal in the Ordos area to below 13 mm to obtain the first slurry;

[0041] (2) mixing the first slurry with water at a mass ratio of 60:40 to obtain the second slurry; adding 0.4wt% naphthalenesulfonic acid formaldehyde condensate of coal raw material to the water;

[0042] (3) The second slurry is wet-processed and finely ground to obtain the third slurry, and the particle size of the third slurry is less than 1mm, and materials less than 45 μm account for more than 80% of the total material; The vertical grinding machine with the blade grinding disc is carried out, the grinding line speed of the blade grinding disc is 10m / s, and the unit volume proces...

Embodiment 2

[0046] A method for preparing superfine coal-water slurry from semi-coke in Shenmu area, wherein the analysis water of semi-coke in Shenmu area is 0.5%, the total water is 4%, the ash content is 9.5%, and the particle size is less than 25mm; the method includes Follow the steps below:

[0047] (1) Crushing the semi-coke in the Shenmu area to less than 13mm to obtain the first slurry;

[0048] (2) mixing the first slurry with water at a mass ratio of 75:25 to obtain a second slurry; adding 0.6wt% lignosulfonate of coal raw material to the water;

[0049] (3) The second slurry is wet-processed and finely ground to obtain the third slurry, and the particle size of the third slurry is less than 1mm, and materials less than 45 μm account for more than 80% of the total material; A vertical grinding machine with a blade grinding disc, the grinding line speed of the blade grinding disc is 15m / s, and the unit volume processing capacity is 2.2m 3 / h·m 3 ; Grinding medium is added in ...

Embodiment 3

[0053] A method for preparing ultra-fine coal-water slurry from low-rank coal in the Ordos area, the low-rank coal in the Ordos area, the analysis water is 6.5%, the total water is 37%, the ash content is 7.5%, and the particle size is less than 3mm; the method Including the following steps:

[0054] (1) crushing the low-rank coal in the Ordos area to below 13 mm to obtain the first slurry;

[0055] (2) mixing the first slurry with water at a mass ratio of 65:35 to obtain the second slurry; the water is added with 0.55wt% humate of coal raw material;

[0056] (3) The second slurry is wet-processed and finely ground to obtain the third slurry, and the particle size of the third slurry is less than 1mm, and materials less than 45 μm account for more than 80% of the total material; A vertical grinding machine with a blade grinding disc, the grinding line speed of the blade grinding disc is 18m / s, and the unit volume processing capacity is 2.3m 3 / h·m 3 ; Grinding medium is add...

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Abstract

The present invention relates to an ultrafine coal water slurry preparation method, which comprises: (1) crushing a coal raw material to achieve a particle size of less than or equal to 13 mm to obtain a first slurry; (2) mixing the first slurry and water according to a mass ratio of 5-85:15-95 to obtain a second slurry; (3) carrying out wet shaping fine grinding on the second slurry to obtain a third slurry, wherein the particle size of the third slurry is less than 1 mm, and the material having the particle size of less than 45 [mu]m accounts for more than or equal to 80% of the total material; and (4) carrying out screen mesh impurity removing on the third slurry to remove impurities so as to obtain the ultrafine coal water slurry. According to the present invention, with the ultrafine coal water slurry preparation method, the process for preparing the ultrafine coal water slurry by using the material having the single characteristic or a variety of different characteristics as the slurry preparing raw material can be achieved; the solid content in the prepared ultrafine coal water slurry has the large adjusting amplitude and can be adjusted between 30-70 wt%; and the preparation method is the wet ore grinding, and has characteristics of safety, stability and long-period operation.

Description

technical field [0001] The invention belongs to the field of coal-water slurry preparation, and relates to a method for preparing ultra-fine coal-water slurry, in particular to a method for preparing ultra-fine coal-water slurry from coal raw materials such as lignite, bituminous coal, anthracite, semi-coke or petroleum coke. Background technique [0002] Coal water slurry is made by mixing coal powder with a certain graded fineness and water. It has certain stability and fluidity. It is a coal-based fluid fuel and raw material. After nearly 30 years of application practice, it has been proved that coal water slurry Gasification has the advantages of mature technology, safe and reliable operation, long-term high-load operation, high system efficiency, and low investment and operating costs. It has significant advantages in energy saving and environmental protection, and at the same time brings significant economic benefits to users. Large-scale promotion and application, the...

Claims

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Application Information

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IPC IPC(8): C10L1/32
Inventor 何国锋段清兵吕向阳张胜局
Owner CCTEG CLEAN ENERGY CO LTD
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