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A variable volume and constant pressure device and method for measuring the solubility of gas in liquid

A constant pressure device, a technology of solubility, applied in the direction of analyzing materials, instruments, etc., to achieve the effect of eliminating pressure changes

Inactive Publication Date: 2018-04-17
XI AN JIAOTONG UNIV
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  • Abstract
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Problems solved by technology

[0004] The purpose of the present invention is to provide a variable volume and constant pressure device and method for measuring the solubility of gas in liquid, to solve the problems existing in the equal volume saturation method, and to provide technical support for obtaining gas solubility data required in the field of energy and chemical industry

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  • A variable volume and constant pressure device and method for measuring the solubility of gas in liquid
  • A variable volume and constant pressure device and method for measuring the solubility of gas in liquid

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Embodiment Construction

[0031] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0032] see figure 1 The variable volume and constant pressure device for measuring the solubility of gas in liquid according to the present invention mainly includes: a gas sample bottle 1; a vacuum pump 2, a first valve 3, a second valve 4, a third valve 5, a gas chromatograph 6, Gas chamber 7, temperature sensor, fourth valve 9, sampling valve 10, sampling valve 11, balance chamber 12, constant temperature bath 13, data acquisition system 14, pressure sensor, fifth valve 16, pressure reducing valve 17 and pressure control gas cylinder 18. The gas chamber 7 is connected with the gas sample bottle 1 , the vacuum pump 2 and the balance chamber 12 through stainless steel pipes, and is used for measuring the amount of gas input into the balance chamber 12 . The gas chamber 7 and the balance chamber 12 are placed in a constant temperature tank 1...

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Abstract

The invention discloses a variable-volume pressure fixing device and method for measuring the solubility of gas in liquid. The variable-volume pressure fixing device includes a gas sample bottle, a gas cavity, a balance cavity, a thermostatic bath with a magnetic stirrer, a pressure sensor, a thermometer, a gas chromatograph, a pressure reducing valve, a pressure control gas cylinder, a vacuum pump and a real-time data acquisition system. The gas cavity is used for controlling and calculating the sample quantity of gas in the balance cavity. The balance cavity is provided with a visual window and a movable piston, the liquid level can be observed, and the pressure inside the balance cavity can be regulated. The constant pressure in the balance cavity is kept by adjusting the movable piston through the pressure control gas cylinder.The method stabilizes the pressure in the balance cavity through the external large-volume gas cylinder, achieves measurement of the solubility of a pure gas substance and a mixture in liquid under constant pressure and can avoid solubility equilibrium offset caused by sampling.

Description

technical field [0001] The invention belongs to the technical field of measuring fluid thermophysical properties, and relates to a device and method suitable for measuring the solubility of gas pure substances and mixtures in liquids. Background technique [0002] Almost all industrial processes involving gas-liquid contact involve the dissolution of gas in liquid. The solubility of gas in liquid is the basic data necessary for the design of these industrial processes. The measurement methods of gas solubility in liquid mainly include gravity balance method, quartz crystal microbalance method, weighing method, gas chromatography, bubble point method, equal volume saturation method, etc. [0003] Among many measurement methods, the equal volume saturation method is widely used due to its advantages of simple operation, high precision and high output efficiency. However, due to the lack of design, it is difficult to measure the solubility of gas under the specified pressure ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N7/04
CPCG01N7/04
Inventor 刘向阳何茂刚张颖白里航彭三国
Owner XI AN JIAOTONG UNIV
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