Porous medium adsorption and diffusion dynamic self-test experiment system and method

A technology of porous media and experimental system, which is applied in the field of dynamic self-testing experimental system of adsorption and diffusion of porous media, and achieves the effect of wide application range, high degree of automation and ingenious design.

Pending Publication Date: 2021-07-20
HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Aiming at the shortcomings of existing adsorption and desorption experimental devices, the present invention proposes a dynamic self-testing experimental system and method for adsorption and diffusion of porous media

Method used

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  • Porous medium adsorption and diffusion dynamic self-test experiment system and method
  • Porous medium adsorption and diffusion dynamic self-test experiment system and method
  • Porous medium adsorption and diffusion dynamic self-test experiment system and method

Examples

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Effect test

Embodiment 1

[0041] A dynamic self-testing experimental system for adsorption and diffusion of porous media, including: a diffused gas constant temperature storage system, a high frequency data automatic acquisition system, a pressure difference automatic leveling system and a gas constant temperature adsorption system.

[0042] The diffused gas constant temperature storage system includes a gas collection column 21 and a water storage column 20 connected at the bottom through a hose 10. The gas collection column 21 and the water storage column 20 are cylindrical or cubic columns with equal cross-sections and the cross-sectional areas of the two are the same. The height of the water storage column 20 is 2 times of the height of gas-collecting column 21. The manual lifting platform 12 below the gas-collecting column 21 is provided with an air intake pipe 1 above the gas-collecting column 21, a water pipe 11 is provided on the flexible pipe 10, and a three-way valve 9 is provided on the water...

Embodiment 2

[0047] A kind of porous medium adsorption diffusion dynamic self-test experiment method, comprises the following steps:

[0048] S1: Open the three-way valve 9 to inject deionized water 7 into the water pipe 11, adjust the height of the manual lifting platform 12 and the automatic lifting platform 26, so that the liquid level in the gas collection column 21 is flush with the exhaust pipe a4, and the water storage column 20 The height of the liquid level is flush with the height of the liquid level in the gas-collecting column 21;

[0049] S2: Put the measured porous medium solid into the adsorption tank 37, open the solenoid valve c32 and the solenoid valve d33, and use the vacuum pump 29 to vacuum the adsorption tank 37 and the reference tank 39 for 12 hours;

[0050] S3: Close the solenoid valve d33, open the solenoid valve b31 and fill the reference tank 39 with a pressure of p h1 Then close the solenoid valve b31, open the solenoid valve d33, record the pressure p in the ...

Embodiment 3

[0066] A dynamic self-testing method for gas adsorption in porous media, comprising the following steps:

[0067] S1: Put the measured porous medium solid into the adsorption tank 37, open the solenoid valve c32 and the solenoid valve d33, and use the vacuum pump 29 to vacuum the adsorption tank 37 and the reference tank 39 for 12 hours;

[0068] S2: Adsorbed gas is filled above the liquid surface of the gas collection column 21, the liquid surface of the water storage column 20 and the gas collection column 21 are even in the initial state, the opaque oil 22 blocks the light emitted by the transmitter 5, and the strip sensor switch 23 is deactivated;

[0069] S3: Open the second outlet of the solenoid valve a30, fill the adsorption tank 37 with helium at a standard atmospheric pressure according to the indication of the gas pressure sensor 38, and then close the second outlet of the solenoid valve a30;

[0070]S4: Open the first outlet of the solenoid valve a30, the adsorbed ...

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Abstract

The invention discloses a porous medium adsorption and diffusion dynamic self-test experiment system and method. The system comprises a diffusion gas constant-temperature storage system, a data high-frequency automatic acquisition system, a pressure difference automatic leveling system and a gas constant-temperature adsorption system. The liquid level of the water storage column and the liquid level of the gas collection column are flush through the differential pressure automatic leveling system, and systematic errors caused by gas pressure changes are avoided; and a diffusion gas constant-temperature storage system and a gas constant-temperature adsorption system are utilized to solve systematic errors caused by gas temperature changes. The data high-frequency automatic acquisition system acquires data information through ultrasonic reflection, and high-frequency and high-accuracy reading can be achieved. And the total volume of gas diffusion and the gas adsorption capacity of the porous medium are calculated through computer programming, and dynamic visual display of experimental data is realized, so that the working efficiency of scientific research is improved. The whole experiment system is high in automation degree, errors caused by manual operation are reduced to a great extent, and meanwhile a large amount of time is saved for researchers.

Description

technical field [0001] The invention relates to the technical field of adsorption and diffusion of porous media, in particular to a dynamic self-testing experimental system and method for adsorption and diffusion of porous media. Background technique [0002] With the rapid development of my country's economy in recent years, the demand for energy has also increased steadily, and the development of coalbed methane and shale gas energy has become a research hotspot. Therefore, the study of the desorption and diffusion characteristics of gas and shale gas in coal rock and shale is of great significance to the development and utilization of coalbed methane and shale gas. Coal rock, shale, and various gas adsorbents are typical porous media materials with complex pore networks inside, and these pore-fracture systems provide the main places for gas storage and migration. Gas migration in porous media can be divided into adsorption, desorption, diffusion and percolation. Among t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/08
CPCG01N15/0826
Inventor 宋浩然仲政周晔欣
Owner HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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