Novel high-stability coal water slurry and preparation method thereof
A coal-water slurry and high stability technology, applied in the field of coal chemical industry, can solve the problems of additives restricting the development of coal-water slurry technology, the rheological properties cannot meet the requirements, and the adaptability of coal and process is poor, so as to achieve stability improvement and balance electrostatic repulsion. , good stability
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Embodiment 1
[0028] A novel highly stable coal-water slurry, comprising 68 parts of coal, 35 parts of water and 1.2 parts of additives by weight;
[0029] The additive is made by mixing the modified polyvinyl alcohol fiber solution with a solid content of 48% and the electrolyte at a mass ratio of 4:1; among them, potassium sulfate is selected as the electrolyte.
[0030] The preparation method of above-mentioned modified polyvinyl alcohol fiber comprises the steps:
[0031] a) Dissolve polyvinyl alcohol fibers with a molecular weight of 1200-1500 in warm water and disperse them in ultrasonic for 30 minutes to obtain mixed component A, wherein the mass ratio of polyvinyl alcohol fibers to warm water is 1:3;
[0032] b) Add tartaric acid, carbodiimide, octylphenol polyoxyethylene ether and 1-ethyl-(3-dimethylaminopropyl) carbodiimide hydrochloric acid successively to mixing component A, and use 0.2mol / The PBS buffer of 1 L adjusts the pH of the system to 6.8-7.4, wherein the PBS buffer of...
Embodiment 2
[0040] A novel high-stable coal-water slurry, comprising 69 parts of coal, 34 parts of water and 1.3 parts of additives by weight;
[0041] The additive is made by mixing the modified polyvinyl alcohol fiber solution with a solid content of 50% and the electrolyte at a mass ratio of 4:1; the electrolyte is potassium nitrate.
[0042] The preparation method of above-mentioned modified polyvinyl alcohol fiber comprises the steps:
[0043] a) Dissolve polyvinyl alcohol fibers with a molecular weight of 1200-1500 in warm water and disperse them in ultrasonic for 30 minutes to obtain mixed component A, wherein the mass ratio of polyvinyl alcohol fibers to warm water is 1:3;
[0044] b) Add tartaric acid, carbodiimide, octylphenol polyoxyethylene ether and 1-ethyl-(3-dimethylaminopropyl) carbodiimide hydrochloric acid successively to mixing component A, and use 0.2mol / The PBS buffer of 1 L adjusts the pH of the system to 6.8-7.4, wherein the PBS buffer of 0.2 mol / L is made of 0.2 ...
Embodiment 3
[0049] A novel high-stable coal-water slurry comprising 70 parts by weight of coal, 32 parts of water and 1.4 parts of additives;
[0050] The additive is made by mixing the modified polyvinyl alcohol fiber solution with a solid content of 51% and the electrolyte at a mass ratio of 4:1; the electrolyte is potassium carbonate.
[0051] The preparation method of above-mentioned modified polyvinyl alcohol fiber comprises the steps:
[0052]a) Dissolve polyvinyl alcohol fibers with a molecular weight of 1200-1500 in warm water and disperse them in ultrasonic for 30 minutes to obtain mixed component A, wherein the mass ratio of polyvinyl alcohol fibers to warm water is 1:3;
[0053] b) Add tartaric acid, carbodiimide, octylphenol polyoxyethylene ether and 1-ethyl-(3-dimethylaminopropyl) carbodiimide hydrochloric acid successively to mixing component A, and use 0.2mol / The PBS buffer of 1 L adjusts the pH of the system to 6.8-7.4, wherein the PBS buffer of 0.2 mol / L is made of 0.2 ...
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