Complete two-stage slurry production equipment of water-coal-slurry and gasified water-coal-slurry by using low-rank coal fuel

Abstract

The invention relates to complete two-stage slurry production equipment of water-coal-slurry and gasified water-coal-slurry by using low-rank coal fuel, mainly used for fuel for industrial boilers and power station boilers and fuel for gasification furnaces. The complete two-stage slurry production equipment for water-coal-slurry and gasified water-coal-slurry from low-rank coal fuel comprises a low-rank coal raw material warehouse (1), a vibration feeder (2), a type conveyer (4), a crusher (5) of a reversible counterattack hammer type, a hopper lifter (6), a low-rank coal middle warehouse (7), a measuring belt machine (10), a spiral feeder (11), a high-concentration water-coal-slurry ball mill (12), a water-coal-slurry vibration sieve (13), a water-coal-slurry buffer tank (14), a water-coal-slurry filter (16), a stability treatment tank (17), a Homogenizing tank (19) and a slurry storage tank (21), wherein a bypass is divided from a discharge port of the high-concentration water-coal-slurry ball mill (12), is a fine slurry preparation system and comprises a rotary vibration sieve (27), a front inlet tank (28) of a fine grinding machine, a medium-concentration ultrafine vertical mill (31) and a slurry storage tank (29) of the fine grinding machine. The invention can improve the product concentration of the water-coal-slurry.

Description

(1) Technical field [0001] The invention relates to a complete set of production equipment for coal water slurry. In particular, it relates to a complete set of production equipment for two-stage pulping low-rank coal fuel coal-water slurry and gasification coal-water slurry. It is mainly used as fuel for combustion of industrial boilers and power plant boilers, and fuel for gasifiers in the coal chemical industry. (2) Background technology [0002] Conventional coal-water slurry is made of about 69% coal, about 30% water and a small amount of compound additives through grinding, mixing certain chemicals, filtering, stability adjustment and homogeneous ripening. A clean fuel that is a liquid fluid with a certain viscosity. At present, in general CWS plants, most of the pulping coals are made of high-quality coking coal, but coking coal resource reserves are small and the price is expensive, which can no longer meet the development of CWS industrialization. Therefore, coal ...

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Problems solved by technology

[0004] 1. Due to the short grinding time of the grinding raw materials in the high-concentration coal-water slurry ball mill, after entering the buffer tank through the outlet of the high-concentration coal-water slurry ball mill and stirring, it can only be the primary product of coal-water slurry, and the thixotropy of coal-water slurry is relatively weak. The yield stress is low, resulting in poor rheology of CWS and low stability of CWS

[0005] 2. The viscosity of coal water slurry in the cylinder of high concentration coal water slurry ball mill is high, the flow velocity in high concentration coal water slurry ball mill is low, the power consumption of grinding is high, the particle size distribution of coal slurry is unreasonable, and the concentration of coal water slurry product is low , the concentration of low-rank coal-water slurry can only reach about 60%

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