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Fire preventing and extinguishing gel for coal mine, and preparation method thereof

A technology for fire-fighting and coal mines, applied in fire-fighting equipment and other directions, can solve problems such as unfavorable fire-fighting work, deterioration of underground production environment, etc., and achieve the effects of controllable glue formation time, good viscoelasticity and remarkable effect.

Inactive Publication Date: 2020-06-02
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Gel is a polymer with a three-dimensional structure, which can cover the coal body, fill and block the pores and cracks of the coal body, has good water retention, and can cool the fire zone at high temperature for a long time. Gel has gradually become the main coal mine Fireproof materials, but some gel materials will produce irritating gas, which will worsen the underground production environment, which is not conducive to the smooth progress of fire prevention and extinguishing work.

Method used

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  • Fire preventing and extinguishing gel for coal mine, and preparation method thereof
  • Fire preventing and extinguishing gel for coal mine, and preparation method thereof
  • Fire preventing and extinguishing gel for coal mine, and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] 1) Prepare sodium carboxymethyl cellulose solution: at room temperature, slowly and evenly add 2 g sodium carboxymethyl cellulose to 100 ml of water, and stir rapidly while adding. You can stop stirring and let it stand for a period of time (10-20 hours) until the sodium carboxymethylcellulose is completely dissolved before use;

[0035] 2) Configure a zirconium chloride solution with a mass fraction of 20%, add citric acid at a ratio of zirconium tetrachloride: citric acid mass ratio of 2:1, and keep stirring until complete reaction to form a zirconium citrate solution;

[0036] 3) Prepare a certain amount of 5% sodium hydroxide solution;

[0037] 4) To the zirconium citrate solution prepared in step 2), titrate 5% sodium hydroxide solution at a rate of 30 drops per minute, and monitor its pH value until the pH value rises to about 7 to stop the titration. When there is white precipitation in the solution, after standing for a period of time, the solution becomes a cl...

Embodiment 2

[0043] 1) Prepare sodium carboxymethyl cellulose solution, add 2.5g sodium carboxymethyl cellulose evenly into 100 ml of water at room temperature, then transfer to a stirrer and stir at a speed of 900r / min, when there is no obvious When there are large lumps, you can stop stirring and let it stand for a period of time (10-20 hours) until the sodium carboxymethyl cellulose is completely dissolved before use;

[0044] 2) Prepare a zirconium tetrachloride solution with a mass fraction of 20%, and mix zirconium tetrachloride: citric acid at a mass ratio of 2:1 to prepare a zirconium citrate solution;

[0045] 3) Configure a sodium hydroxide solution with a mass fraction of 5%;

[0046] 4) Into the zirconium citrate solution prepared in step 2), drop sodium hydroxide solution at a rate of 30 drops per minute, monitor its pH value, stop the titration until the pH value rises to about 7, and let it stand until the solution Turn into a clear solution, and stir at a speed of 75r / min ...

Embodiment 3

[0052] 1) Prepare sodium carboxymethyl cellulose solution, add 3 g sodium carboxymethyl cellulose evenly into 100 ml water at room temperature, then transfer to a stirrer and stir at a speed of 1000 r / min, when there is no obvious When there are large lumps, you can stop stirring and let it stand for a period of time (10-20 hours) until the sodium carboxymethyl cellulose is completely dissolved before use;

[0053] 2) Prepare a zirconium tetrachloride solution with a mass fraction of 20%, and mix zirconium tetrachloride: citric acid at a mass ratio of 2:1 to prepare a zirconium citrate solution;

[0054] 3) Prepare a sodium hydroxide solution with a mass fraction of 5%;

[0055] 4) Into the zirconium citrate solution prepared in step 2), drop sodium hydroxide solution at a rate of 30 drops per minute, monitor its pH value, stop the titration until the pH value rises to about 7, and let it stand until the solution Turn into a clear solution, and stir at a speed of 100r / min dur...

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Abstract

The invention discloses a fire preventing and extinguishing gel for coal mines, and a preparation method thereof. According to the invention, sodium carboxymethyl cellulose is used as a polymer, zirconium citrate with a cross-linking effect is introduced, gluconic acid-delta-lactone capable of controlling a gelling time by controlling the zirconium ion release speed is taken as a pH modifier, andascorbic acid for inhibiting the activity of coal free radicals is added; the gel is easy to prepare, the gelling time is controllable, and the gels with different proportions can be selected according to different requirements to meet the time requirement; physical and chemical effects are combined to extinguish fire, and the effect is remarkable; the state is stable and can be restored to the original state after being physically destroyed, and a good colloidal state is still kept after one month; and the gel has good viscoelasticity and strong thermal stability, can meet the requirements ofmine fire prevention and extinguishment sites, and is suitable for coal mine fire prevention and extinguishment.

Description

technical field [0001] The invention discloses a fire-preventing gel for coal mines and a preparation method thereof, belonging to the technical field of fire-prevention materials for coal mines. Background technique [0002] In my country's energy industry, coal will still be the main energy source in our country for quite a long time. The spontaneous combustion of coal releases a large amount of harmful gas, damages the environment, burns coal resources, and may even cause a major vicious accident of gas and coal dust explosions that cause casualties, seriously threatening coal mine production and the lives of miners. Therefore, the prevention and control of mine fires is very important. The prevention and control of coal spontaneous combustion should destroy the heat storage environment while eliminating the oxygen supply condition, so a material with superior performance is needed to prevent and extinguish mine spontaneous combustion fire. The mud foam materials, high ...

Claims

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Application Information

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IPC IPC(8): A62D1/00
CPCA62D1/0064
Inventor 王俊峰董凯丽梁择文赵永飞刘轩
Owner TAIYUAN UNIV OF TECH
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