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Compound colloid for treating coal bed fire

A colloid and fire technology, applied in fire rescue, fire prevention equipment and other directions, can solve the problems of large amount of glue-forming raw materials, difficult to control on-site ratio, labor intensity of workers, etc. long lasting effect

Inactive Publication Date: 2007-03-21
西安森兰科贸有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The gel base is generally made of water glass, and the coagulant is made of NH 4 HCO 3 or NaHCO 3 , but the cost is very high, and the amount of raw materials added into the glue is large, the on-site ratio is difficult to master, and the labor intensity of the workers is high
In addition, using NH 4 HCO 3 When used as a coagulant, there is NH 3 released, affecting miners' health

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Take four parts of a certain amount of water, respectively add fly ash, loess, sand and stone powder with a diameter of less than 1mm accounting for 100% of the water weight, mix evenly, and then add sodium polyacrylate (molecular weight greater than 1500 Ten thousand). After testing, gelation begins to occur in 25-45 seconds, and its fluidity is 64-85mm in 30 seconds, which fully meets the requirements of fire-fighting grouting and air isolation.

[0020] The test method of fluidity is: place the metal truncated cone mold with smooth and seamless inner wall with a diameter of 36mm on the upper mouth, a diameter of the lower mouth of 64mm, a height of 60mm, and a thickness of 5mm on the center of the horizontal glass plate. The inside of the cone mold and the glass plate are both Wipe it with a damp cloth, and cover it with a damp cloth; add water to a 2000ml beaker, then add the weighed powder and stir evenly, place the cone mold in the center of the horizontal glass p...

Embodiment 2

[0022] Take four parts of a certain amount of water, respectively add fly ash, loess, sand and stone powder accounting for 140% of the water weight and having a diameter of less than 1mm, and mix evenly; then add 0.5% of the water weight Sodium polyacrylate (molecular weight greater than 15 million) . After testing, gelation occurs after 20 seconds, and its fluidity is 64-70mm in 20 seconds.

Embodiment 3

[0024] Take four parts of a certain amount of water, respectively add fly ash, loess, sand, stone powder accounting for 40% of the water weight, diameter less than 1mm, sodium carboxymethyl cellulose accounting for 1% of the water weight; then add 1.5% of the water weight Sodium polyacrylate (molecular weight greater than 15 million). After testing, gelation occurs after 60 seconds, and the fluidity is 80-120mm in 60 seconds.

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Abstract

The compound colloid for treating coal bed fire consists of water, aggregate and gel forming agent. The aggregate is fly ash, loess, sand soil or rock powder; and the gel forming agent is sodium polyacrylate. When the compound colloid is used, water and the aggregate are first mixed to form slurry, and sodium polyacrylate is then added. Into the compound colloid, aluminum sulfate and ammonium bicarbonate may be added to foam the gel and to decrease the slurry consumption, and some suspending agent may be added to avoid settling of the aggregate during pipelining. The fire extinguishing colloid for coal bed has low cost, simple operation and low consumption.

Description

technical field [0001] The invention belongs to the field of anti-fire extinguishing materials, in particular to a composite colloid used for coal seam fire control. Background technique [0002] The main reason for the coal seam to catch fire naturally is that there are cracks in the coal seam, the air enters the coal seam with the cracks, oxygen reacts with some free radicals to release heat, and the heat accumulates to the ignition point and it happens naturally. Injecting fly ash or yellow mud, gel, etc. is one of the coal seam fire prevention and control measures required by the "Coal Mine Safety Regulations". The fire extinguishing principle of fly ash or yellow mud grouting is that the water in the slurry absorbs a large amount of heat, which plays a role in extinguishing the fire and cooling down the temperature. The slurry covers the surface of the floating coal to isolate the air and prevent the reaction of oxygen and free radicals. Fly ash or yellow mud has good ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A62D1/06A62C3/02
Inventor 文虎张辛亥刘鑫邓军马砺张平丽
Owner 西安森兰科贸有限责任公司
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