Device for measuring danks surface gas adsorption and danks desorption curves

A gas adsorption and desorption curve technology, applied in the direction of analyzing materials, instruments, etc., can solve the problem of not reflecting the essential characteristics of gas desorption, and achieve the effect of accurate test results and improved accuracy

Inactive Publication Date: 2015-09-09
CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Application Information

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Problems solved by technology

[0005] One of the purposes of the present invention is to provide a device for measuring the gas adsorption and desorption curves of coal shale surface that can effectively improve the accuracy in order to solve the problem that traditional devices cannot reflect the essential characteristics of each gas desorption

Method used

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  • Device for measuring danks surface gas adsorption and danks desorption curves
  • Device for measuring danks surface gas adsorption and danks desorption curves
  • Device for measuring danks surface gas adsorption and danks desorption curves

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Experimental program
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Embodiment

[0022] Put the coal rock or shale sample test piece into the adsorption tank 1, connect the power supply of the super constant temperature box 2, set the experimental temperature to 23°C according to the actual formation temperature, and monitor the temperature in the adsorption tank 1 by the temperature sensor 3 at the gas outlet end, and the installation is completed Finally, close the valve 4 of the vacuum pump and the valve of the high-pressure gas cylinder to be tested, open the outlet valve of the helium cylinder, fill the system with a certain amount of helium, and then close the outlet valve of the helium cylinder, and record the system pressure change every 1 hour after the pressure is stable , if the system pressure does not change significantly within 6 hours, it means that the airtightness is good; if the system pressure changes significantly, it means that the airtightness is poor, and the experimental device needs to be rechecked and assembled.

[0023] If the air...

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Abstract

The invention discloses a device for measuring danks surface gas adsorption and danks desorption curves. The device comprises a super constant temperature box, a gas path system and a monitoring system, wherein the gas path system comprises a high-pressure to-be-measured gas cylinder, a vacuum pump, a helium gas cylinder and an adsorption tank; the monitoring system comprises an inlet end high-precision gas mass flow meter, a system pressure sensor which are arranged at the gas inlet end of the adsorption tank, and a temperature sensor and an outlet end high-precision gas mass flow meter which are arranged at the gas outlet end of the adsorption tank; the monitoring system is externally connected to a computer; the adsorption tank and the temperature sensor are arranged in the super constant temperature box. According to the device for measuring danks surface gas adsorption and danks desorption curves, the automatic collection and recording of methane desorption data can be realized, the measurement accuracy is greatly improved, and through calculation of the computer, the accuracy is improved, and the methane adsorption/desorption dynamic process can be accurately reflected.

Description

technical field [0001] The invention relates to a device for measuring the gas adsorption on the surface of coal shale and the desorption curve of coal shale. Background technique [0002] Due to the reservoir characteristics of coal rock and shale, it is determined that under certain pressure conditions, it has high adsorption capacity for methane and other gases stored in it. The desorption process of shale to the hydrocarbon gas adsorbed on its surface. Therefore, it is of great significance for the rational development of coalbed methane and shale gas to understand the adsorption and desorption mechanism of coal rock and shale for hydrocarbon gas. [0003] The most basic and direct research method for understanding the adsorption and desorption mechanism of coal rock and shale is indoor evaluation. [0004] At present, the experimental devices for measuring gas desorption can be divided into two categories, one is the gravimetric method, and the other is the volumetric...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N7/04
Inventor 徐春碧张旭戚志林雷登生曾顺朋张仕峰刘建军杨得圃焦国盈
Owner CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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