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Experiment device for initial laws of tectonic coal gas desorption

An experimental device and a technology for structuring coal, which is applied in the direction of analyzing materials and instruments, can solve the problems that cannot reflect the essential characteristics of coal gas desorption, the amount of experimental coal samples is too small, and the device is under low pressure, so as to improve the response time and data collection. The effect of precision, small error and fast decay speed

Inactive Publication Date: 2013-10-02
HENAN POLYTECHNIC UNIV
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Problems solved by technology

The gravimetric method has high experimental accuracy, but the device bears a small pressure, which is not suitable for gas desorption measurement under high pressure, and the gravimetric method uses few coal samples, which cannot reflect the essential characteristics of gas desorption in coal
The container method is now widely used, but the amount of coal samples in the experiment is relatively small and the repeatability of the experiment is poor

Method used

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  • Experiment device for initial laws of tectonic coal gas desorption

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Embodiment Construction

[0016] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0017] figure 1 It is a diagram of the experimental device for desorption of structural coal gas provided by the embodiment of the present invention. For ease of illustration, only the parts relevant to the present invention are shown.

[0018] The high-purity gas cylinder 1 is connected to a port of the three-way valve 12 through the stop valve 13, and one port of the three-way valve 12 is connected to a port of the four-way valve 11 through the stop valve 13, and one port of the four-way valve 11 is directly connected to the four-way valve. One port of the one-way valve 13 and the four-way valv...

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Abstract

The invention discloses a experiment device for initial laws of tectonic coal gas desorption. A high-purity gas steel cylinder is connected with a port of a three-way valve through a stop valve. A port of the three-way valve is connected with a port of a four-way valve through the stop valve. The four-way valve is connected with the stop valve, a vacuum gauge, a vavuum pump, a large-size measuring cylinder and a pressure gage. The three-way valve is connected with the four-way valve through the stop valve directly. The pressure gage is connected with a coal sample tank. The coal sample tank is arranged in a constant-temperature water-bath device. The bottom of the coal sample tank is connected with the constant-temperature water-bath device. A port of the four-way valve is connected with a gas mass flow meter through a spherical valve. One end of the gas mass flow meter is connected with a computer, and the other end of the gas mass flow meter is connected with a desorption instrument. Through the combination of a sensor and a computer, rapid acquisition of gas desorption speed data is achieved. The gas desorption instrument can measure the gas desorption amount synchronously, so that the reaction time of experiment data acquisition is shortened and the data acquisition precision is raised. The experiment device is advantaged by less error and large data acquisition amount.

Description

technical field [0001] The invention belongs to the technical field of gas measurement, and in particular relates to an experimental device for the initial law of desorption of structural coal gas. Background technique [0002] Structural coal is the product of brittle fracture or ductile deformation and rheological migration of coal seams under tectonic action, and it is a sign for predicting coal and gas outburst. The characteristics of low strength, high adsorption, fast release and low permeability of tectonic coal are the root causes of coal and gas outburst. Critical state of coal and gas outburst. The rapid desorption capacity of structural coal gas is also an important reason for the inaccurate determination of coal seam gas content, which seriously affects the prediction of outburst dangerous areas and the implementation effect of outburst prevention measures. [0003] At present, the prediction and prevention of mine gas disasters is mainly based on the measureme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N7/10
Inventor 江林华赵宇侯锦绣李云波谢向向
Owner HENAN POLYTECHNIC UNIV
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