High-stability coal water slurry and preparation method thereof

Abstract

The invention relates to high-stability coal water slurry and a preparation method thereof. The coal water slurry contains coal powder, an additive, a stabilizer and water and has the mass concentration of 64-70 percent, wherein antibiotic fungi residues are adopted as the stabilizer, the addition of a fungi residue dry base is 0.1-1.5 percent of the total mass of a coal powder dry base and the fungi residue dry base, the addition of the additive is 1.0-2.0 percent of the mass of the coal water slurry, and the rest is water, and the antibiotic fungi residue comprises lincomycin wet bacteria residues, gentamicin wet bacteria residues and penicillin wet bacteria residues. In the preparation process of the coal water slurry, the antibiotic fungi residues are added, have less viscosity influence on the coal water slurry, but can remarkably decrease the syneresis rate of the coal water slurry and improve the stability of the coal water slurry, the slurry can be placed for a long time, and the requirements for pumping, atomizing, transporting in various modes, combusting and gasifying can be met. The method has low cost, not only can improve the stability of the coal water slurry, but also provides a new path for solving the problem of environmental pollution due to the antibiotic fungi residues.

Description

technical field [0001] The invention relates to a coal-water slurry and a preparation method thereof, in particular to a high-stability coal-water slurry and a preparation method thereof. Background technique [0002] Coal water slurry is a coal-based fluid fuel developed in the early 1980s. It is a clean and environmentally friendly fuel. It not only retains the combustion characteristics of coal, but also has the application characteristics of liquid combustion similar to heavy oil. It is a reality in China at present. clean coal technology. It is made of 60%-70% of coal with different particle size distribution, 30-40% of water and less than 1.5% of chemical additives through certain processing technology. It looks like oil, with good fluidity, stable storage, convenient transportation (train or car tanker, pipeline, ship), combustion efficiency as high as 95%, and pollutants (SO 2 , NO X ) has low emissions, about 2t of coal water slurry can replace 1t of fuel oil, an...

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Problems solved by technology

[0008] Although remarkable achievements have been made in the field of coal-water slurry additives at home and abroad, the existing additives, especially stabilizers, have problems such as narrow range of coal types and high cost.

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