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A kind of pure coal water slurry and production method thereof

A technology of coal-water slurry and coal slurry, which is applied in the field of fuel manufacturing, can solve problems such as environmental pollution and restricted use.

Active Publication Date: 2015-08-26
LUZHOU LANDLONG CEMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the ash content of the produced coal-water slurry always exists, its combustion also causes environmental pollution, thus limiting the use of this coal-based fuel

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The coal-water slurry produced in a certain region of Xinjiang is adopted to produce coal-water slurry according to the method of the present invention.

[0033] The coal quality is: about 3.5% ash, about 38% volatile matter, and about 0.18% total sulfur. The composition of the ash is shown in Table 1.

[0034]Table 1. Ash composition (by weight percentage)

[0035] al 2 o 3

SiO 2

Fe 2 o 3

MgO

CaO

13.5%

46.5%

12.3%

1.93%

1.93%

[0036] First, the raw coal is crushed into particles or powders with a particle size below 3 mm, placed in an acid-resistant pool, and then according to the oxide Al in the ash 2 o 3 , Fe 2 o 3 , CaO, and MgO content, add a hydrochloric acid aqueous solution with a concentration of 20% by volume, so that the liquid surface completely covers the coal, and soak for 3.5 hours. Remove the soaking solution by suction filtration, then add the hydrochloric acid aqueous solution to s...

Embodiment 2

[0042] Coal produced in a certain area of ​​Shaanxi is adopted to produce pure coal according to the method of the present invention.

[0043] The coal quality is: about 5.0% ash, about 37% volatile matter, and about 0.22% total sulfur. The ash composition is shown in Table 2.

[0044] Table 2. Ash composition (by weight percentage)

[0045] Al 2 o 3

SiO 2

Fe 2 o 3

MgO

CaO

12.8%

46.5%

11.8%

2.01%

14.11%

[0046] First, the raw coal is crushed into particles or powders with a particle size below 3 mm, placed in an acid-resistant pool, and then according to the oxide Al in the ash 2 o 3 , Fe 2 o 3 , CaO, and MgO contents were added to an aqueous hydrochloric acid solution with a concentration of 15% by volume, so that the liquid surface completely covered the coal, and soaked for 4.0 hours. Remove the soaking solution by suction filtration, then add the hydrochloric acid aqueous solution to soak, and the amou...

Embodiment 3

[0052] Coal produced in a certain area of ​​Inner Mongolia is adopted to produce pure coal according to the method of the present invention.

[0053] The coal quality is: about 3.9% ash, about 35% volatile matter, and about 0.21% total sulfur. The ash composition is shown in Table 3.

[0054] Table 3. Ash composition (by weight percentage)

[0055] al 2 o 3

SiO 2

Fe 2 o 3

MgO

CaO

14.8%

47.5%

12.1%

2.15%

13.85%

[0056] First, the raw coal is crushed into particles or powders with a particle size below 3 mm, placed in an acid-resistant pool, and then according to the oxide Al in the ash 2 o 3 , Fe 2 o 3 , CaO, and MgO contents were added to an aqueous hydrochloric acid solution with a concentration of 10% by volume, so that the liquid surface completely covered the coal, and soaked for 4.1 hours. Remove the soaking solution by suction filtration, then add the hydrochloric acid aqueous solution to soak, and t...

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Abstract

The invention relates to pure coal water slurry and a production method thereof, and provides the production method of the pure coal water slurry. The production method comprises the steps of soaking feed coal with an aqueous solution of hydrochloric acid / sulfuric acid, and an aqueous solution of hydrofluoric acid in sequence to remove ash in the feed coal, and then preparing coal water slurry from the processed feed coal. The pure coal water slurry produced according to the production method is high in combustion heat; smoke and dust generated during the combustion of the pure coal water slurry can meet national smoke and dust emission standards, without the treatment of any dust removing equipment; noncombustible coal ash and coal slag cannot be left; the pure coal water slurry can be used in areas with high environment protection requirements; the condition of fuel shortage can be beneficial for being alleviated.

Description

technical field [0001] The invention belongs to the field of fuel production, in particular, the invention relates to a coal-water slurry and a production method thereof. Background technique [0002] Coal is the most important primary energy, currently accounting for more than 60% of the world's primary energy. At present, my country's coal production has reached more than three billion tons. The main purpose of coal is as fuel, but unlike other fuels, such as petroleum, which can be completely burned, coal contains high ash content, so its combustion process will bring serious environmental pollution. To this end, a variety of dust removal equipment and processes have been invented and applied, and in the case of a high proportion of coal ash or associated gangue, coal washing is also used to remove part of the gangue and other impurities, so that the coal Quality improvement and ash reduction. However, the inherent ash in coal cannot be removed by such physical or mech...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10L1/32
Inventor 齐正良齐润章
Owner LUZHOU LANDLONG CEMENT
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