Method for preparing coal water slurry by matching low-rank coal low-temperature pyrolysis semicoke with non-caking coal

A low-temperature pyrolysis, non-stick coal technology, used in liquid carbonaceous fuels, petroleum industry, fuels, etc., can solve the problem of semi-coke utilization approaching saturation and other problems, and achieve the effects of not easy deposition, simple and reliable methods, and easy availability.

Pending Publication Date: 2022-07-05
CHINA UNIV OF MINING & TECH +1
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  • Claims
  • Application Information

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Problems solved by technology

[0013] In view of the deficiencies of the existing technology, this application provides a method for preparing coal-water slurry by low-temperature pyrolysis semi-coke of low-rank coal combined with non-sticky coal, which solves the existing problems that the traditional utilization method of semi-coke is close to saturation.

Method used

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  • Method for preparing coal water slurry by matching low-rank coal low-temperature pyrolysis semicoke with non-caking coal
  • Method for preparing coal water slurry by matching low-rank coal low-temperature pyrolysis semicoke with non-caking coal
  • Method for preparing coal water slurry by matching low-rank coal low-temperature pyrolysis semicoke with non-caking coal

Examples

Experimental program
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Effect test

Embodiment 1

[0046] The semi-coke obtained after pyrolysis treatment at 550 ℃ for 30 min was taken in the pyrolysis plant, and the semi-coke obtained was processed by a rapid compaction coal pulverizer for 720 s to obtain semi-coke powder with a maximum particle size of 200 μm. The non-stick coal was naturally air-dried in the air for 24 hours to obtain an air-dried coal sample, and the coal sample was processed by a rapid compaction coal mill for 1080 s to obtain a non-stick coal powder with a maximum particle size of 100 μm. According to the mass ratio of "non-stick coal: semi-coke = 9:1", 0.2%, 0.6wt.% and 1.0wt.% of sodium lignosulfonate (SLS), sulfonated acetone formaldehyde polycondensate ( SAF) and naphthalenesulfonic acid formaldehyde condensate (NSF) dispersant and 30-40wt.% water, use a mechanical stirring paddle to stir for 5min at a rotating speed of 500r / min to prepare a semi-coke-non-stick coal-water slurry. The slurry properties such as slurry concentration, apparent viscosi...

Embodiment 2

[0051] The semi-coke obtained after pyrolysis treatment at 550 ℃ for 30 min was taken from the pyrolysis plant, and the semi-coke was processed by rapid compaction coal milling for 720 s to obtain semi-coke powder with a maximum particle size of 200 μm. The non-stick coal was naturally air-dried in the air for 24 hours to obtain an air-dried coal sample, and the coal sample was processed by a rapid compaction coal mill for 1080 s to obtain a non-stick coal powder with a maximum particle size of 100 μm. According to the mass ratio of "non-stick coal: semi-coke = 8:2", 0.2%, 0.6wt.% and 1.0wt.% of sodium lignosulfonate (SLS), sulfonated acetone formaldehyde polycondensate ( SAF) and naphthalenesulfonic acid formaldehyde condensate (NSF) dispersant and 30-40wt.% water, use a mechanical stirring paddle to stir for 5min at a rotating speed of 500r / min to prepare a semi-coke-non-stick coal-water slurry. The slurry properties such as slurry concentration, apparent viscosity and water...

Embodiment 3

[0055] The semi-coke obtained after pyrolysis treatment at 550 ℃ for 30 min was taken from the pyrolysis plant, and the semi-coke was processed by rapid compaction coal milling for 720 s to obtain semi-coke powder with a maximum particle size of 200 μm. The non-stick coal was naturally air-dried in the air for 24 hours to obtain an air-dried coal sample, and the coal sample was processed by a rapid compaction coal mill for 1080 s to obtain a non-stick coal powder with a maximum particle size of 100 μm. According to the mass ratio of "non-stick coal: semi-coke = 7:3", 0.2%, 0.6wt.% and 1.0wt.% of sodium lignosulfonate (SLS), sulfonated acetone formaldehyde polycondensate ( SAF) and naphthalenesulfonic acid formaldehyde condensate (NSF) dispersant and 30-40wt.% water, using a mechanical stirring paddle to stir at a speed of 500r / min for 5min to prepare a semi-coke-non-stick coal-water slurry. The slurry properties such as slurry concentration, apparent viscosity and water separa...

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Abstract

The invention discloses a method for preparing coal water slurry by matching low-rank coal low-temperature pyrolysis semi-coke with non-caking coal, which comprises the following steps: pyrolyzing low-rank coal at 550 DEG C by using a pyrolyzing furnace, and treating the obtained semi-coke for 720 seconds by using a rapid compression type coal milling sampling machine to obtain semi-coke powder with proper granularity; the method comprises the following steps: naturally air-drying non-caking coal in air to obtain an air-dried coal sample, and treating the air-dried coal sample for 1080 seconds by using a rapid compression type coal grinding sampling machine to obtain non-caking coal powder with the particle size suitable for slurrying; the preparation method comprises the following steps: adding 0.1-1.0 wt.% of an anionic dispersant and 30-40 wt.% of water according to a certain matching proportion of semicoke and non-caking coal, and stirring for 5 minutes by using a mechanical stirring paddle at the rotating speed of 500 r/min to prepare semicoke-non-caking coal water slurry; when the low-rank coal is pyrolyzed to generate pyrolysis gas, the semi-coke and the non-caking coal are matched to prepare the coal water slurry, so that the additional value of pyrolysis byproducts is increased, the reutilization of resources is realized, and the method is simple and has multiple benefits of environmental protection, economy and the like.

Description

technical field [0001] The invention belongs to the field of utilization of coal pyrolysis products for preparing coal-water slurry, and in particular relates to a method for preparing coal-water slurry by low-temperature pyrolysis semi-coke of low-rank coal and non-stick coal. Background technique [0002] Semi-coke is also known as low-temperature coke. Gray-black, with higher volatiles than coke, crunchy and porous texture, good reaction performance, easy to burn, no smoke. It is a solid product of coal dry distillation at low temperature (500-600°C). The main uses of traditional semi-coke are: [0003] (1) For civil or industrial fuel. The semi-coke is moderate in size, easy to ignite, smokeless when burning, and is widely used as a civil fuel in Europe. Semi-coke with powder and volatile content <20% is suitable for boiler fuel. [0004] (2) As a coal blending additive in high temperature coking. Semi-coke has low strength and high reactivity, and cannot be dir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L1/32
CPCC10L1/326
Inventor 孟献梁叶泽浦张同华褚睿智朱竹军吴国光李晓孔卉茹江晓凤李伟松
Owner CHINA UNIV OF MINING & TECH
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