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Compound stopping agent for preventing pulverized coal from spontaneous combustion

A chemical inhibitor, self-ignition technology, applied in the direction of fire prevention, dust prevention, safety devices, etc., can solve problems such as delaying the spontaneous combustion process of coal

Inactive Publication Date: 2013-09-18
SHENMU ZHANGJIAMAO COAL MINING CO LTD OF SHAANXI COAL & CHEM IND GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is to say, there is no inhibitor that can completely prevent the spontaneous combustion of coal, but can only delay the spontaneous combustion process of coal.

Method used

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  • Compound stopping agent for preventing pulverized coal from spontaneous combustion
  • Compound stopping agent for preventing pulverized coal from spontaneous combustion
  • Compound stopping agent for preventing pulverized coal from spontaneous combustion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Sodium dodecyl sulfonate is made into 0.1% aqueous solution, and the weight percentage is 70% sodium dodecyl sulfonate solution, and then the weight percentage is 30% sodium percarbonate dissolved in the above penetrant solution, After stirring evenly, component A is obtained;

[0035] Then, the prepared sodium chloride of component A and component B was added to the pulverized coal at 40°C in a weight ratio of 1:1.5, and its temperature was monitored in real time and compared with the blank sample. Such as figure 1 As shown, the influence of the inhibitor on the pulverized coal temperature is obtained.

Embodiment 2

[0037] Make fatty alcohol polyoxyethylene ether into 0.3% aqueous solution, weigh 80% fatty alcohol polyoxyethylene ether solution by weight, and then dissolve 10% sodium persulfate and 10% potassium persulfate into the above-mentioned In the penetrant solution, after stirring evenly, component A is obtained;

[0038] Then add the prepared ammonium chloride of component A and component B to the coal powder according to the weight ratio of 1:2.0, and place it on the XK type spontaneous combustion test bench to detect the gases in the process of spontaneous combustion in real time . As shown in Figure 2(a), Figure 2(b) and Figure 2(c).

Embodiment 3

[0040] Dioctyl sodium dibutyrate sulfonate and sodium sulfamate are formulated into 0.2% aqueous solution, and 45% dioctyl sodium dibutyrate sulfonate and 45% sodium sulfamate aqueous solution are weighed respectively, and then 5% by weight of percarbamide and 5% of ammonium persulfate are dissolved in the above penetrant solution, and after stirring evenly, component A is obtained;

[0041] Then add the prepared A component and B component sodium bicarbonate and diammonium hydrogen phosphate to the coal powder according to the weight ratio of 1:3.0. The coal powder is packaged in an independent ton bag. The open-pit coal plant of Jiamao Coal Mine is stockpiling. Real-time monitoring of the central temperature of the bag coal to obtain the influence of the inhibitor on the temperature of the stored coal powder, such as image 3 shown.

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Abstract

The invention discloses a compound stopping agent for preventing pulverized coal from spontaneous combustion and a preparation method of the compound stopping agent. The compound stopping agent mainly comprises a component A and a component B, wherein the component A comprises 70%-90% of a penetrant and 10%-30% of peroxide; the component B comprises inorganic salt. The component A and the component B are mixed at a weight ratio of 1:(1.5-3) and used as the compound stopping agent. The preparation method comprises steps as follows: firstly, the penetrant is prepared into an aqueous solution, then the peroxide is dissolved in the penetrant, and the mixture is stirred, so that the component A of the stopping agent is obtained; the component A is matched with the inorganic salt of the component B for use. The compound stopping agent has the characteristics of low cost and non-toxic. During the use, the component A and the component B of the stopping agent are jointly and uniformly added to the pulverized coal, the operation is simple, the stopping effect is excellent, and the compound stopping agent has a wide application prospect.

Description

technical field [0001] The invention relates to a composite inhibitor, in particular to a composite inhibitor suitable for preventing spontaneous combustion of pulverized coal in the coal industry. technical background [0002] Spontaneous combustion of coal is mainly caused by the heat released by the recombination of coal and oxygen, and it mainly goes through four stages: physical adsorption, chemical adsorption, formation of intermediate transition products, and product decomposition. The whole process of coal spontaneous combustion is like a chain reaction, one ring after another, as long as one of the rings is broken, the whole reaction will be terminated. In the process of coal-oxygen recombination, the interaction between coal and oxygen at low temperature is initially dominated by physical adsorption, and after the physical adsorption reaches equilibrium, it is dominated by chemical adsorption. The chemical adsorption process has the most important influence on coal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F5/06
Inventor 方刚昝丽娜王碧清邵水源李增林巨鹏何钊方世剑王渝岗尚文静庞青涛
Owner SHENMU ZHANGJIAMAO COAL MINING CO LTD OF SHAANXI COAL & CHEM IND GRP
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