Gasified coal-water-slurry preparation process and corresponding production line

A technology for gasification of coal-water slurry and preparation process, which is applied in the gasification of granular/powdered fuel, petroleum industry, liquid carbon-containing fuel, etc. Long-term stable operation and other problems, to achieve the effect of reasonable particle size distribution of coal slurry, improved throughput capacity, and increased load

Active Publication Date: 2013-07-03
YANKUANG GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Due to the large particle size of the current gasified coal-water slurry, its particle size distribution determines that the stability of the coal slurry is poor. Precipitation blocks pipelines and equipment, making it impossible to run stably for a long period of time; and the grinding efficiency of the fine mill is greatly reduced, so optimization and improvement are needed

Method used

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  • Gasified coal-water-slurry preparation process and corresponding production line
  • Gasified coal-water-slurry preparation process and corresponding production line

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Experimental program
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Effect test

Embodiment 1

[0029] Embodiment one: if figure 1 As shown, the special-purpose production line of the preparation new technology of gasification coal-water slurry of the present invention comprises coal storage bunker 1, coal mill 2 and fine mill 3, and wherein coal storage bunker 1 feeding port is provided with a weighing feeder 4, The measured coal enters the drum feeder 5, mixes with additives and water according to the proportion, and then enters the coal mill 2 for grinding, and the ground coal water slurry passes through the coal mill outlet chute 6 and the low-pressure coal slurry pump 7. The degasification furnace 8 is characterized in that: a circuit pump 9 is also connected to the discharge trough 6 of the coal mill, and the outlet of the circuit pump 9 is connected to a coarse slurry rotary vibrating screen 10, and the coarse slurry rotary vibrating screen 10 Water inlet pipe 11 and additive feeding pipe 12 are also provided on the top, the oversize of this coarse slurry rotary v...

Embodiment 2

[0035] Such as figure 2 Shown: embodiment two: this gasification coal-water slurry preparation process comprises following operation:

[0036]1). Coal, water and additives are processed into coal water slurry by coal mill 2, wherein the weight mixing ratio of coal, water and additives is 65:28:1;

[0037] 2). The coal-water slurry obtained in process 1) is divided into two paths, one path of coal-water slurry is directly sent to gasifier 8, and the path of coal-water slurry accounts for 80% of the output of coal mill 2; the other path of coal-water slurry is mixed with water and After additive, send into a coarse slurry rotary vibrating screen 10;

[0038] After the coarse slurry rotary vibrating screen 10 screens out large particles, the remaining coal-water slurry is sent to the fine mill 3, and after the fine mill 3 grinds, the coal-water slurry is mixed with flushing water again at the slurry outlet 15 of the fine mill, and finally forms Fine coal slurry with a concentr...

Embodiment 3

[0041] Embodiment three: the gasification coal-water slurry preparation process comprises the following procedures:

[0042] 1).Use the coal mill 2 to process coal, water and additives into coal water slurry, wherein the weight mixing ratio of coal, water and additives is 60:30:1

[0043] 2). The coal-water slurry obtained in process 1) is divided into two paths, one path of coal-water slurry is directly sent to the gasifier 8, and the path of coal-water slurry accounts for 90% of the output of coal mill 2; the other path of coal-water slurry is mixed with water and After additive, send into a coarse slurry rotary vibrating screen 10;

[0044] After the coarse slurry rotary vibrating screen 10 screens out large particles, the remaining coal-water slurry is sent to the fine mill 3, and after the fine mill 3 grinds, the coal-water slurry is mixed with flushing water again at the slurry outlet 15 of the fine mill, and finally forms The concentration is 47% fine coal slurry;

[...

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Abstract

The invention relates to a novel rotation-vibration sieve. When coal-water-slurry is processed by using an existing rotation-vibration sieve, the coal-water-slurry containing a large amount of coal particles directly scours a sieve mesh, and the sieve mesh should be replaced every 2-3 days, such that the machine is frequently shut down, and long-period stable operation is affected. Also, an upper sieve cylinder and a lower sieve cylinder are fastened by using bundle buckles. When the rotation-vibration sieve works, constant vibration is carried out, and buckle disengagement accident frequently happens. Therefore, the rotation-vibration sieve provided by the invention comprises a cylindrical pedestal and a sieve cylinder. A vibration generation device and a driving motor are arranged in the cylindrical pedestal. A crude material outlet and a fine material outlet are arranged outside a sieve cylinder. A sieve mesh and a fine material plate are arranged in the sieve cylinder. A sieve cover is arranged on the sieve cylinder. A feeding port is provided on the sieve cover. A buffering mixer is arranged in the sieve cylinder and is positioned above the sieve mesh. The buffering mixer faces a matching feeding pipe. The novel rotation-vibration sieve provided by the invention has the advantages of simple structure, convenient assembly and disassembly, long sieve mesh life, and long working period. The novel rotation-vibration sieve provided by the invention is suitable to be used for sieving various slurries and especially coal-water-slurry.

Description

technical field [0001] The invention relates to a gasification coal-water slurry preparation process and a corresponding production line. Background technique [0002] Coal-water slurry pressurized gasification technology is one of the most mature and widely used clean coal technologies in the world today. The coal slurry used for coal-water slurry gasification comes from the coal slurry preparation system. Coal, water and additives are added to pulverized coal in a certain proportion machine to produce coal water slurry with a concentration of about 60%. The higher the concentration of coal-water slurry, the higher the gas production rate and the higher the utilization rate of coal, and vice versa. [0003] The Chinese invention patent with the publication number CN101173765B discloses a method for preparing high-concentration coal-water slurry by using low-rank coal. In this method, part of the coarse coal slurry is diluted with water, and then ground into a fine coal slu...

Claims

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Application Information

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IPC IPC(8): C10L1/32C10L1/10C10J3/46C10J3/50
Inventor 吕向阳杨军红芮胜波曹昭军高宪国何国锋
Owner YANKUANG GRP CO LTD
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