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A composite inhibitor for preventing and controlling coal spontaneous combustion and preparation method thereof

A coal spontaneous combustion and inhibitor technology, which is applied in dust prevention, mining equipment, earthwork drilling, etc., can solve the problems of limited inhibition efficiency of physical inhibitors and coal heat accumulation, etc., and achieves environmental friendliness and long life of resistance Long and efficient effect

Inactive Publication Date: 2016-08-17
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] These inhibitor technologies have achieved the effect of preventing spontaneous combustion and dust in the process of coal stacking and transportation in different aspects, but the inhibition efficiency of physical inhibitors is limited, and the oxidizing agents commonly used in chemical inhibitors, when the reaction process occurs It will release heat so that the heat of the coal body will accumulate, and the oxidant itself has a greater fire hazard

Method used

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  • A composite inhibitor for preventing and controlling coal spontaneous combustion and preparation method thereof
  • A composite inhibitor for preventing and controlling coal spontaneous combustion and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1) First weigh 10g of polymer base material-polyvinyl alcohol, add it to 100ml of water, then heat and stir at a constant temperature of 60°C for 60-120min, until a uniform and viscous polymer aqueous solution is obtained. 2) Then add 1 g of ammonium dihydrogen phosphate into 20 ml of water and mix evenly, then mix with the polymer aqueous solution to obtain a polymer solution. 3) 3g surfactant-sodium dodecylbenzenesulfonate is dissolved in 60ml hot water simultaneously, then the hydrotalcite product synthesized by chemical method (referring to figure 1 ) weighed 1g and added it, heated and stirred to obtain a uniformly dispersed mixed solution. 4) After weighing 2g of calcium hydroxide and dissolving it in 20ml of water, add the mixed solution in 3), and disperse evenly to obtain an aqueous solution containing hydrotalcite. 5) Finally, the polymer solution and the aqueous solution containing hydrotalcite are uniformly mixed to obtain a composite inhibitor product.

Embodiment 2

[0024] 1) First weigh 6g of polymer base material-polyvinyl alcohol, add it to 60ml of water, then heat and stir at a constant temperature of 60°C for 60-120min until a uniform and viscous polymer aqueous solution is obtained. 2) Then add 2 g of starch into 20 ml of water and mix evenly, then mix and disperse with the polymer aqueous solution to obtain a polymer solution. 3) At the same time, 3g of surfactant-sodium dodecylbenzenesulfonate was dissolved in 60ml of hot water, and then 1g of the hydrotalcite product synthesized by chemical method was weighed into it, heated and stirred to obtain a uniformly dispersed mixed solution. 4) After weighing 4g of calcium hydroxide and dissolving it in 20ml of water, add the mixed solution in 3), and disperse evenly to obtain an aqueous solution containing hydrotalcite. 5) Finally, the polymer solution and the aqueous solution containing hydrotalcite are uniformly mixed to obtain a composite inhibitor product.

Embodiment 3

[0026] 1) First weigh 6g of polymer base material-polyvinyl alcohol, add it to 60ml of water, then heat and stir at a constant temperature of 60°C for 60-120min until a uniform and viscous polymer aqueous solution is obtained. 2) Then add 4 g of starch into 20 ml of water and mix evenly, then mix and disperse with the polymer aqueous solution to obtain a polymer solution. 3) At the same time, 3g of surfactant-sodium dodecylbenzenesulfonate was dissolved in 40ml of hot water, and then 1g of the hydrotalcite product synthesized by chemical method was weighed into it, heated and stirred to obtain a uniformly dispersed mixed solution. 4) After weighing 2g of magnesium hydroxide and dissolving it in 10ml of water, add the mixed solution in 3) after dissolving, and disperse evenly. 5) After weighing 4g of calcium hydroxide and dissolving it in 20ml of water, add the mixed solution in 4), and disperse evenly to obtain a mixed aqueous solution containing hydrotalcite. 6) Finally, the...

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Abstract

The invention relates to a novel environment-friendly composite stopping agent capable of preventing coal spontaneous combustion and a preparing method of the novel environment-friendly composite stopping agent. The composite stopping agent comprises a macromolecular matrix, an inorganic stopping agent, a surface active agent and a reinforcing agent. The constituents of the composite stopping agent in an aqueous solution comprise, by mass, the macromolecular matrix occupying 3% to 8% and containing one or two types of polyvinyl alcohol and starch, the inorganic stopping agent occupying 0.5% to 2% and containing one or more of organic modification hydrotalcite, ammonium dihydrogen phosphate and magnesium hydrate, the surface active agent occupying 1% to 3%, the reinforcing agent occupying 0.5% to 4% and the balance water occupying 83% to 95%, wherein the surface active agent is dodecylbenzene sodium sulfonate and the reinforcing agent is calcium hydroxide. The composite stopping agent is sprayed on the surface of coal under normal temperature, other devices and conditions are not needed, harmful gas and waste are not generated, and the composite stopping agent has not toxic and side effect on the human body and is environmentally friendly. Meanwhile, the composite stopping agent is good in physical moisturizing function and can effectively permeate through a coal seam, obtain large contact superficial area with the coal seam and well achieve the coal spontaneous combustion prevention function.

Description

technical field [0001] The invention belongs to coal safety guarantee technology, and in particular relates to a chemical inhibitor for preventing and controlling spontaneous combustion of coal. Background technique [0002] When coal is in contact with air during normal temperature stacking and transportation, it will be oxidized, and the heat generated will raise its temperature, causing fire or smoke, that is, spontaneous combustion. Fires caused by coal spontaneous combustion will not only cause a large loss of coal resources, but also release a large amount of harmful gases, threatening environmental safety, which is an urgent safety problem that needs to be solved. The principle of preventing coal spontaneous combustion is to eliminate the occurrence of coal oxidation or to eliminate the accumulation of heat in the process of coal oxidation. Inhibitor is a kind of chemical preparation to prevent coal spontaneous combustion. According to its inhibitory effect on coal s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21F5/06C09K21/02
Inventor 丁严艳徐亮金辉
Owner HANGZHOU DIANZI UNIV
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