High-temperature coal oil mixture preparation method

Abstract

The invention discloses a high-temperature coal oil mixture preparation method, which comprises the following steps of: (1) causing coal dust from a coal dust storage tank to enter a horizontal solid-liquid mixer through a coal dust inlet, mixing the coal dust and solvent oil injected into the horizontal solid-liquid mixer through liquid inlets from a high temperature solvent tank, discharging an obtained coal oil mixture from a discharge opening of the horizontal solid-liquid mixer, and delivering the coal oil mixture to a coal mixture stirred tank; (2) further homogenizing the coal oil mixture under the action of a stirring paddle in the coal mixture stirred tank; and (3) pumping the coal oil mixture out of the coal mixture stirred tank by using a coal mixture discharge pipeline, returning a part of the pumped coal oil mixture to the coal mixture stirred tank by using a coal mixture circulating pipeline, and delivering the other part of the pumped coal oil mixture to a downstream liquefaction reaction system by using a reaction material delivery pipeline. By the method provided by the invention, the problems that small coal particles are difficult to completely disperse in the solvent oil and the high-temperature coal oil mixture is difficult to form can be solved, qualified coal mixtures can be rapidly prepared, and the continuous coal liquefaction reaction production of the coal mixture can be realized.

Description

technical field [0001] The invention relates to a preparation method of oil-coal slurry, more specifically, a preparation method of high-temperature oil-coal slurry. Background technique [0002] The commonly used solid-liquid two-phase mixing method is generally to add the two materials into the mixer separately, and then mix them by mechanical stirring or bubbling stirring. For powders with fine particle size, especially powders with a particle size of less than 100 mesh, it is easy to "wrap" when mixed with liquid, that is, when fine powder is mixed with liquid, the liquid only dissolves the surface of the powder block and cannot penetrate into the powder. The inside of the body, thereby producing secondary aggregated particles of the powder, and it is very difficult to redisperse the generated secondary aggregated particles into the liquid. In actual operation, the above-mentioned "secondary agglomeration" phenomenon often occurs when coal powder with a particle size of...

AI Technical Summary

Problems solved by technology

This method can solve the problem that small-sized coal particles are difficult to completely disperse in solvent oil and form a uniform high-temperature oil-coal slurry, can quickly prepare qualified coal slurry, and can realize the continuous production of coal slurry required for coal liquefaction reaction

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