Device system for testing CO release and temperature change in coal incising process

A technology of temperature change and coal body, applied in the field of test system for simulating coal body crushing, can solve problems such as no relevant in-depth research, and achieve the effect of avoiding gas loss, realizing real-time monitoring and good repeatability

Active Publication Date: 2015-12-23
HENAN POLYTECHNIC UNIV
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  • Application Information

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Problems solved by technology

These observations confirm that the CO produced when the shearer cuts coal is an important source of underground CO, but it is not an effective amount of CO as a symbolic gas to predict coal spontaneous combustion. However, the CO concentration of this part is related to the working state of the shearer What is the relationship be

Method used

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  • Device system for testing CO release and temperature change in coal incising process
  • Device system for testing CO release and temperature change in coal incising process
  • Device system for testing CO release and temperature change in coal incising process

Examples

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Embodiment 1

[0030] Example 1: 1. Experimental process and working condition setting: The experiment mainly considered three factors: the quality of the coal sample, the rotational speed of the motor, and the crushing atmosphere. Among them, the coal sample quality is the amount of coal sample that is fully crushed by the blade, and this parameter reflects the amount of coal crushed by the shearer pick in the actual coal mining work. The motor speed is the motor speed of the pulverizer, which can be adjusted by the frequency converter to change the speed of the blade rotation, and this parameter reflects the speed of the drum rotation when the shearer is working. The crushing atmosphere was respectively selected nitrogen atmosphere and air atmosphere.

[0031] Before starting the experiment, first accurately weigh the coal sample to be crushed, put it into the crushing chamber of the pulverizer, and then pass the corresponding atmosphere gas. After the gas composition is stable, close the...

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Abstract

The invention discloses a device system for testing CO release and temperature change in a coal incising process and relates to a test system for simulating the coal breaking. The device system comprises a coal incising simulation device and a data acquisition system, wherein the coal incising simulation device comprises a gas distribution system (gas, a pressure meter, a control valve and a gas pipeline), a smashing system (a pulverizer and a frequency converter); and the data acquisition device comprises a temperature measuring thermocouple, a gas chromatograph and a data analysis and collection computer. The gas distribution system is connected with a gas inlet end of the pulverizer, the gas chromatograph is connected with a gas outlet end of the pulverizer, the temperature measuring thermocouple is arranged inside a coal sample tank, and the gas chromatograph and the temperature measuring thermocouple are respectively connected to a computer. The device system can be used for effectively simulating and analyzing the temperature change and gas release condition when the coal structure is damaged during the process that the coal is incised by a coal mining machine. The system is simple and convenient to install and easy to operate, and experiment data have good measurability and operability.

Description

technical field [0001] The invention relates to a test system for simulating coal crushing, in particular to a device system for testing CO release and temperature change during coal cutting. Background technique [0002] In order to effectively prevent coal mine fires and reduce the waste of resources and casualties caused by coal spontaneous combustion, many scholars in my country have devoted themselves to the research of related prediction and forecasting technologies. Significant gas analysis is one of the prediction technologies for coal spontaneous combustion. Among them, carbon monoxide (CO) is one of the gas products of coal spontaneous combustion. Because of its relatively large amount of generation and high sensitivity, most coal mines at home and abroad use it as a symbolic gas for predicting coal spontaneous combustion. However, in recent years, a large number of field situations in China, such as the Ciyaobao Coal Mine in Ningxia, Fujian, the Shendong Mine, the...

Claims

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Application Information

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IPC IPC(8): G01K7/04G01N30/00G01N1/28G01N33/22
Inventor 不公告发明人
Owner HENAN POLYTECHNIC UNIV
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