System device for preparing coal water slurry by long-distance pipeline coal transportation

Abstract

The invention discloses a system device for preparing coal water slurry by long-distance pipeline coal transportation. Raw material coal from a coal storage storehouse is firstly transported to a crushing workshop by a reshipment belt, is crushed to be less than 6mm by a crushing machine, and is transported to a storehouse matching scratch board by a tail coal belt to enter into a cushion storehouse before grinding; the coal in the cushion storehouse before grinding is transported to a coal grinding machine by a quantitative coal feeder to be ground in a water adding way, prescreened, and transported into a safety sieve to be classified in an examining way after being ground into slurry, wherein the oversize product of the coal is transported into a slurry returning tank, the slurry in the slurry returning tank is transported back to the coal grinding machine to be ground by a slurry returning tank pump, and the screen underflow of the coal enters into a coal slurry cushioning tank to be transported to a slurry storing tank to be stored by a coal slurry cushioning tank pump; and an inlet end of the coal grinding machine is communicated with a water feed metering pump, and the slurry storing tank is provided with a stirring device. The system device is simple in technology, high in automaticity, and stable in the slurry, the slurry can be obtained by grinding and screening the raw material coal and the water in proportion under the normal-temperature condition, the slurry can realize the long-distance pipeline transportation, and the water is easy to remove. The system device can be widely used for the pipeline transportation slurry industry.

Description

technical field [0001] The invention relates to a special coal slurry preparation system, in particular to a system device for preparing coal-water slurry by long-distance pipeline coal transportation. Background technique [0002] At present, my country's coal industry is implementing structural adjustments, vigorously developing deep processing of coal, and implementing integrated strategies of coal production, transportation and marketing such as coal chemical industry and coal-electricity joint operation, which provides development opportunities for coal pipeline transportation. From the perspective of coal transportation, traditional coal transportation methods such as railways, highways and water transportation cannot fully meet the needs of my country's "west-to-east coal transportation, north-to-south coal transportation" for various reasons, and pipeline coal transportation is a new type of coal transportation. The transportation method has many advantages such as hi...

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Problems solved by technology

[0004] On the one hand, due to the constraints of various factors, my country has not yet formed a system in the research of long-distance pipeline coal transportation technology including coal slurry preparation, and the scientific research results are almost zero.

[0005] On the other hand, although my country has made considerable progress in the research and engineering application of high-concentration coal-water slurry preparation technology in recent years, and has found a new way to solve the problem of fuel oil resource shortage in my country, the coal-water slurry prepared by this technology Slurry cannot be transported in long-distance pipelines

In addition, in the preparation process of high-concentration coal-water slurry, additives accounting for about 2% of the dry coal mass must be added to improve its fluidity and stability, and these additives are expensive, which greatly increases the operating costs of enterprises

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