The invention discloses a multi-component
coal water
slurry additive and application thereof. The multi-component
coal water
slurry additive comprises 50-80 parts of a polycarboxylate dispersing agent, 10-60 parts of a surfactant, 5-45 parts of
cellulose ether, 1-15 parts of
phosphate and 0-3 parts of inorganic base. The polycarboxylate dispersing agent is used for dispersing
coal water
slurry, can simultaneously take the effects of a dispersing agent and a stabilizer and is low in consumption,
sulfur-free, little in
pollution, efficient and
environmentally friendly in the
coal water slurry preparation process; the polycarboxylate dispersing agent, the surfactant and the
phosphate are compounded, so that the interfacial tension and hydrophilicity / hydrophobicity of the surfaces of coal particles are changed, the dispersing agent is accelerated to be uniformly distributed on the pulverized coal particles, and the lubricating effect of a water film among the pulverized coal particles is improved; through a synergistic effect, the dispersing and stabilizing effects are achieved to the maximum extent; and due to the addition of the
cellulose ether and the inorganic base, the storage stability of the
coal water slurry can be improved. The
coal water slurry disclosed by the invention has relatively
high concentration and also has the characteristics of low
viscosity, good stability and good flowability.