Multi-component coal water slurry additive and application thereof

Abstract

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.

Description

technical field [0001] The invention belongs to the technical field of preparation of chemical reagents, in particular to the technical field of preparation of coal water slurry additives in the technical field of coal energy application, in particular to a multi-component high-efficiency coal water slurry additive and its application. Background technique [0002] my country is a country rich in coal but deficient in oil. Coal resources account for more than 96% of the total fossil resources. Domestic energy production and consumption are also dominated by coal, which has caused serious harm to the ecological environment. Control the pollution caused by coal processing and utilization, and reduce SO emissions 2 , CO 2 , TSP and NO x , saving coal is an inevitable requirement and a realistic choice to promote my country's energy security supply and implement a sustainable development energy strategy. As a new type of clean energy, coal water slurry not only retains the co...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of high slurry viscosity, poor stability, and low coal powder concentration during the use of coal water slurry, and to provide a multi-component high-efficiency coal water slurry additive and its preparation in the coal water slurry application in

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