A method for increasing the concentration of end product of pipeline transportation coal water slurry

A technology for product concentration and water transportation, applied in fuel additives, liquid carbon-containing fuels, petroleum industry, etc., can solve problems such as insufficient optimization of coal slurry particle size distribution, low efficiency, and increased oxygen consumption

Active Publication Date: 2019-07-12
CCTEG CLEAN ENERGY CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the problems in the prior art of high energy consumption and low efficiency, insufficient optimization of the particle size distribution of coal slurry, more coarse particles in the coal slurry, increased oxygen consumption and incomplete reaction, etc., the present invention provides a method to improve pipeline transportation Method for final product concentration of coal water slurry

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  • A method for increasing the concentration of end product of pipeline transportation coal water slurry
  • A method for increasing the concentration of end product of pipeline transportation coal water slurry
  • A method for increasing the concentration of end product of pipeline transportation coal water slurry

Examples

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Embodiment 1

[0066] This embodiment provides a method for improving the concentration of the terminal product of pipeline transportation coal-water slurry. The low-concentration pipeline transportation coal slurry and the raw coal used in this embodiment are all low-rank coals in Shenmu, Shaanxi, and the analysis water Mad is 4.5wt %, total water Mt is 15.3wt%, ash Aad is 7.9wt%, volatile Vdaf is 28.8wt%.

[0067] Such as figure 1 As shown, the method includes the following steps:

[0068] (1) Select a low-concentration pipeline coal slurry with a concentration of 50wt%, the largest particle ≤ 2.4mm, and the fluidity index of the coal slurry is 13cm. The fluidity index of the coal slurry is tested with reference to the cement "GB / T8077-2012 Concrete Admixture Homogeneity According to the test method of "fluidity of cement slurry" in the industry standard of "Test Method", the stability of coal slurry is 20% of the water separation rate after being placed for 2 hours;

[0069] (2) Mix the...

Embodiment 2

[0075] This embodiment provides a method for improving the concentration of the terminal product of pipeline transportation coal-water slurry. The low-concentration pipeline coal slurry and the raw coal used in this embodiment are all low-rank coals in the Ordos area of ​​Inner Mongolia, and the analysis water Mad is 5.5wt %, total water Mt is 18.5wt%, ash Aad is 10.5wt%, volatile Vdaf is 25.7wt%.

[0076] Such as figure 2 As shown, the method includes the following steps:

[0077] (1) Select a low-concentration pipeline coal slurry with a concentration of 45wt%, the largest particle is ≤2mm, and the fluidity index of the coal slurry is 14cm. The fluidity index of the coal slurry is tested with reference to the cement "GB / T8077-2012 Concrete Admixture Homogeneity Test Method "in the industry standard "Cement slurry fluidity" test method, the stability of coal slurry is 25% of the water separation rate after being placed for 2 hours;

[0078] (2) Mix the low-concentration pi...

Embodiment 3

[0084] This embodiment provides a method for improving the concentration of the terminal product of pipeline transportation coal-water slurry. The low-concentration pipeline coal slurry used in this embodiment and the raw coal used are all low-rank coals in the Ordos area of ​​Inner Mongolia. Its composition is the same as that in Example 2. same.

[0085] Described method is with reference to the method in embodiment 2, and difference is: in the step (1), choosing concentration is the low-concentration pipeline coal slurry of 35wt%; The concentration of the first slurry prepared in the step (2) is 30wt%, finely ground The proportion of particles with a particle size of ≤75 μm is 60 wt %; the mass concentration of the second slurry prepared in step (3) is 30 wt %, wherein the proportion of particles with a particle size of ≤ 75 μm is 80 wt %.

[0086] In the high-concentration finished coal slurry prepared in this example, the mass concentration of the finished coal slurry is ...

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Abstract

The invention provides a method for improving the concentration of a pipeline transportation coal water slurry end product. The method includes the steps of: (1) mixing part of pipeline transportation coal slurry with water and an additive, and performing fine grinding to obtain a first slurry; (2) mixing part of pipeline transportation coal slurry, part of a first slurry, water and an additive, and performing fine grinding to obtain a second slurry; (3) mixing the remaining first slurry with the second slurry to obtain a third slurry; (4) mixing raw coal with the remaining pipeline transportation coal slurry, part of the third slurry, water and the additive, and then performing wet ore grinding to obtain a fourth slurry; and (5) mixing the fourth slurry with the remaining third slurry, and carrying out screening and impurity removal, thus obtaining a finished coal slurry product. The method provided by the invention can optimize coal slurry granularity grading, and improves the concentration by at least 8-20% compared with the pipeline transportation end product. And the coal slurry fluidity, stability and atomization performance are all greatly improved.

Description

technical field [0001] The invention belongs to the technical field of coal-water slurry preparation, and relates to a method for increasing the concentration of a terminal product of coal-water slurry transported by pipelines, in particular to a method for increasing the concentration of a terminal product of coal-water slurry transported by long-distance pipelines. Background technique [0002] Coal slurry pipeline transportation can be used as another important coal resource transportation method besides railway, highway and waterway transportation. It has the advantages of relatively low investment, little impact on the environment, little impact on climate and low transportation cost. It is a coal transportation method that is safe, efficient, advanced in technology, energy-saving and land-saving, and clean and environmentally friendly. Affected by rheology and stability, the concentration of coal slurry transported by conventional pipelines is generally lower than 55%,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10L1/32C10L1/24
CPCC10L1/146C10L1/2462C10L1/326C10L2300/30C10L2300/40
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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