Method for preparing coal water slurry through mixing of reverse osmosis membrane (RO) sewage and VAE emulsion waste water

A technology of coal-water slurry and emulsion, which is applied in the field of preparing coal-water slurry by mixing RO sewage and VAE emulsion wastewater, can solve the problems of insufficient salt content and waste of energy, and achieves the improvement of reused water production, huge economic benefits and energy saving. The effect of water benefits, significant economic benefits and environmental benefits

Active Publication Date: 2016-06-01
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If evaporative crystallization technology is adopted, the salt content is not

Method used

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  • Method for preparing coal water slurry through mixing of reverse osmosis membrane (RO) sewage and VAE emulsion waste water
  • Method for preparing coal water slurry through mixing of reverse osmosis membrane (RO) sewage and VAE emulsion waste water
  • Method for preparing coal water slurry through mixing of reverse osmosis membrane (RO) sewage and VAE emulsion waste water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 27 parts of RO membrane high-salt wastewater were adjusted to pH 7 with hydrochloric acid and mixed with 8 parts of VAE emulsion. Then, 63.65 parts of coal and 1.2 parts of dispersant were added to the mill for grinding, and then 0.15 parts of stabilizer was added to make a slurry.

Embodiment 2

[0022] 10 parts of RO membrane high-salt wastewater was adjusted to pH 7 with hydrochloric acid and mixed with 26 parts of VAE emulsion. Then, 62.9 parts of coal and 1 part of dispersant were added to the mill for grinding, and then 0.1 part of stabilizer was added to make a slurry.

Embodiment 3

[0024] 18 parts of RO membrane high-salt wastewater were mixed with 18 parts of VAE emulsion after adjusting the pH to 7 with hydrochloric acid, then added 62.5 parts of coal and 1.3 parts of dispersant into the mill for grinding, and then added 0.2 parts of stabilizer and then ground into a slurry.

[0025] The parameter of the coal-water slurry that each embodiment obtains sees the following table:

[0026]

[0027] Burning effect:

[0028]

[0029] Through the above table data, it is verified that the coal water slurry produced by RO sewage and VAE emulsion wastewater meets the quality standard requirements of coal water slurry, and is used normally in the boiler and the flue gas environmental protection discharge meets the Beijing "Boiler Air Pollutant Emission Standard" 21148-2007DB standard requirement.

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Abstract

The invention discloses a method for preparing coal water slurry through mixing of reverse osmosis membrane (RO) sewage and VAE emulsion waste water. The coal water slurry comprises, by mass, 0-36% of RO sewage, 0-36% of VAE emulsion waste water, 0.05-0.2% of a stabilizing agent, 0.5-1% of a dispersant and 60-68% of coal dust and the total mass parts of the RO and VAE emulsion waste water is in a range of 10-36. The method comprises adjusting pH of the RO sewage to 6-7 through hydrochloric acid, mixing the RO sewage and the VAE waste emulsion according to different ratios, adding the dispersant and coal into a mill together, carrying out milling, adding the stabilizing agent into the mixture and carrying out milling to obtain the coal water slurry.

Description

technical field [0001] The present invention relates to the method that utilizes reverse osmosis membrane RO sewage and VAE emulsion waste water to mix the method for making sewage coal slurry, specifically, is the method that utilizes RO sewage and VAE emulsion waste water to replace fresh water to make sewage coal slurry, utilizes RO sewage The development of sewage slurry with VAE emulsion wastewater, and its application in coal-water slurry boiler. Background technique [0002] Coal water slurry is a new type of oil-substituting coal-based fuel developed after the world oil crisis in the 1970s. It has the advantages of convenient transportation, high combustion efficiency, and low pollutant emissions. It can replace fuel oil for power plant boilers, industrial Boilers and industrial furnaces. Coal-water slurry is a low-pollution, high-efficiency, pipeline-transportable oil-substituting coal-based fluid fuel obtained through physical processing of about 65% by mass of co...

Claims

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Application Information

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IPC IPC(8): C10L1/32
Inventor 姜琳张永林高建新宋金栋崔建光朱智宏
Owner CHINA PETROLEUM & CHEM CORP
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