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Novel environment-friendly composite stopping agent capable of preventing coal spontaneous combustion and preparing method thereof

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

Inactive Publication Date: 2014-04-09
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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  • Novel environment-friendly composite stopping agent capable of preventing coal spontaneous combustion and preparing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0022] 1) First weigh 10g of polymer base-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 1g of ammonium dihydrogen phosphate into 20ml of water and mix evenly, then mix with polymer aqueous solution to obtain polymer solution. 3) At the same time, dissolve 3g of surfactant-sodium dodecylbenzenesulfonate in 60ml of hot water, and then dissolve the hydrotalcite product synthesized by chemical method (see figure 1 ) weighed 1g and added it, heated and stirred to obtain a uniformly dispersed mixed solution. 4) Weigh 2g of calcium hydroxide and dissolve 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 2g of starch into 20ml of water and mix evenly, then mix and disperse with the polymer aqueous solution to obtain a polymer solution. 3) At the same time, dissolve 3g of surfactant-sodium dodecylbenzenesulfonate in 60ml of hot water, then weigh 1g of the hydrotalcite product synthesized by chemical method into it, heat and stir to obtain a uniformly dispersed mixed solution. 4) Weigh 4g of calcium hydroxide and dissolve 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 4g of starch into 20ml of water and mix evenly, then mix and disperse with the polymer aqueous solution to obtain a polymer solution. 3) At the same time, dissolve 3g of surfactant-sodium dodecylbenzenesulfonate in 40ml of hot water, then weigh 1g of the hydrotalcite product synthesized by chemical method into it, heat and stir to obtain a uniformly dispersed mixed solution. 4) Weigh 2g of magnesium hydroxide and dissolve it in 10ml of water, then add the mixed solution in 3) after dissolving, and disperse evenly. 5) Weigh 4g of calcium hydroxide and dissolve it in 20ml of water, add the mixed solution in 4), and disperse evenly to obtain a mixed aqueous solution containing hydrotalcite. 6) Finally, mix the polymer solution and the mixed aqu...

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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 novel and environment-friendly 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 inhib...

Claims

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Application Information

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IPC IPC(8): E21F5/06C09K21/02
Inventor 丁严艳
Owner HANGZHOU DIANZI UNIV
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