A kind of highly stable coal water slurry and preparation method thereof
A coal water slurry, 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, rheological properties can not meet the requirements, poor adaptability of coal and process, etc., to achieve stability improvement and balance electrostatic repulsion , good stability
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Embodiment 1
[0028] A 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, the electrolyte is potassium sulfate.
[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 hydrochloride in turn to the mixed 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....
Embodiment 2
[0040] A highly 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; among them, 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 hydrochloride in turn to the mixed 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....
Embodiment 3
[0049] A highly 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; among them, 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 hydrochloride in turn to the mixed 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....
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