Multi-functional coal sample spontaneous combustion oxidizing and warming experimental apparatus

An experimental device and multi-functional technology, applied in the field of mine safety engineering, can solve problems such as low efficiency and cumbersome experimental methods, and achieve the effects of flexible experimental process, high experimental accuracy, and improved experimental efficiency.

Inactive Publication Date: 2013-11-20
LIAONING TECHNICAL UNIVERSITY
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Problems solved by technology

Among them, regarding the determination of the oxygen consumption rate of coal under different oxygen concentrations, the existing traditional method is to pass gas samples with different oxygen concentrations into the coal sample tank, and conduct experiments separately; first, prepare a gas with a certain oxygen concentration. One experiment can only obtain the oxygen consumption rate value of coal under one oxygen concentration, and the experiment of different oxygen concentration must reconfigure the gas sample to do the experiment again, the experiment method is cumbersome and the efficiency is low

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  • Multi-functional coal sample spontaneous combustion oxidizing and warming experimental apparatus
  • Multi-functional coal sample spontaneous combustion oxidizing and warming experimental apparatus
  • Multi-functional coal sample spontaneous combustion oxidizing and warming experimental apparatus

Examples

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Embodiment 1

[0048] In this example, coal samples from the -850 working face of Jiudaoling Coal Mine in Liaoning were taken for a closed oxygen consumption experiment. For specific experimental results, see Figure 8 , using regression analysis to get Figure 9 .

[0049] Through experimental measurement, draw the basic rule of oxygen consumption of coal sample tank 4 in the process of coal oxidation as follows:

[0050] 1) The change of oxygen concentration is approximately a negative exponential decay change;

[0051] 2) When the oxygen concentration decreases to a certain value, the attenuation change tends to stop;

[0052] 3) Coal samples generate CO at room temperature;

[0053] 4) CO generation (concentration) corresponds to the change of oxygen concentration, and changes approximately exponentially;

[0054] Through experimental analysis, the attenuation change law of oxygen concentration in a sealed environment is obtained, according to the minimum oxygen concentration value o...

Embodiment 2

[0073] In this embodiment, an underground pure coal sample is taken from the Jiudaoling Coal Mine in Liaoning Province for experimentation. The coal sample tank 4 can contain 2kg of experimental coal sample once, the coal sample capacity is 2300mL, and the coal sample tank 4 has a total capacity of 3000mL. The key to the natural heating experiment is to reasonably determine the flow rate of the air. The amount of ventilation can be judged by judging the concentration of oxygen in the output air after coal oxidation. The flow rate is adjusted according to the outlet oxygen concentration of not less than 18%. The initial flow rate of the experiment is 20mL / min. As the coal continues to heat up in the experiment, the oxygen consumption accelerates. Afterwards, it is adjusted according to the outlet oxygen concentration, and the flow rate can reach more than 25mL / min. . In the later stage of the experiment, water vapor was constantly emitted from the outlet pipe 14 of the box bo...

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Abstract

The invention discloses a multi-functional coal sample spontaneous combustion oxidizing and warming experimental apparatus, and belongs to the technical field of mine safety engineering. The experimental apparatus disclosed by the invention comprises an experiment box body, wherein a gas inlet of a coal sample tank is communicated with one end of a preheating pipe through a connecting pipeline, the other end of the preheating pipe is communicated with an outlet of a gas pump, an inlet of the air pump is communicated with a second outlet of a linkage switching valve through a gas flowmeter, and a gas outlet of the coal sample tank is communicated with a first inlet of the linkage switching valve; the signal output end of a temperature sensor in the coal sample tank is connected with the signal input end of a temperature collector, the signal output end of the temperature collector is respectively connected with a data transmission interface and an experimental main control unit, and the experimental main control unit is connected with the input end of a temperature controller; a first outlet, before the pushing is implemented, of the linkage switching valve is communicated with a gas outlet pipe of the box body, and a second inlet is communicated with a gas inlet pipe of the box body; a first outlet, after the pushing is implemented, of the linkage switching valve is communicated with a second inlet of the linkage switching valve through a gas detector; a gas outlet of a gas outlet pipe of the box body is communicated with a gas chromatograph arranged outside the experimental box body.

Description

technical field [0001] The invention belongs to the technical field of mine safety engineering, in particular to a multifunctional coal sample spontaneous combustion oxidation and heating experimental device. The experimental device can be applied to the experimental research of coal spontaneous combustion oxidation, symbol gas and the shortest spontaneous combustion period in the coal spontaneous combustion prevention and control project. Background technique [0002] Spontaneous combustion of coal in coal mines is an important disaster that affects the safety of coal mine production and restricts the smooth mining of coal mine working faces. In the basic work of its prevention and research, it is necessary to carry out experimental work for the determination of three basic indicators: one is the experiment of coal oxidation characteristics Determination, that is, to understand the oxygen consumption rate and CO production ratio of coal with certain properties (particle siz...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N25/32
Inventor 李宗翔李林王双勇贾化成王天明
Owner LIAONING TECHNICAL UNIVERSITY
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