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Apparatus and method for determining phase state or phase change of high-pressure fluid

A technology of high-pressure fluid and phase change, applied in the direction of material resistance, etc., can solve the problem of high cost and achieve the effect of less investment in equipment

Inactive Publication Date: 2016-04-13
TAIYUAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Among them, method (4) and method (5) are new methods reported in the literature in recent years, which can measure the phase state of the static system, and can also perform in-situ tracing on the flow system, but both methods require special signal receiving devices ,higher cost

Method used

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  • Apparatus and method for determining phase state or phase change of high-pressure fluid
  • Apparatus and method for determining phase state or phase change of high-pressure fluid
  • Apparatus and method for determining phase state or phase change of high-pressure fluid

Examples

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Effect test

Embodiment 1

[0036] Example 1: Device for Measuring High-Pressure Fluid Phase State or Phase Change in the Present Invention

[0037] Such as figure 1 As shown, the device for measuring the phase state or phase change of the high-pressure fluid of the present invention includes: electrode 2, the electrode material of this electrode is metal platinum sheet, size is 5mm * 5mm, thickness 0.5mm, two metal platinum sheets The spacing is 4mm, and the electrodes are placed in the high-pressure fluid in the autoclave 1 to measure the conductivity of the high-pressure fluid; the conductivity display device 9 is connected to the electrode 2 through an insulated wire 8, and is used to display the conductivity of the high-pressure fluid ; and a high pressure sealing device (sealing ring 7) for fixing and sealing the electrodes.

Embodiment 2

[0038] Example 2: Device for Measuring High-Pressure Fluid Phase State or Phase Change in the Present Invention

[0039] The present embodiment is similar to embodiment 1, and its difference is that filler 10 is arranged between two metal platinum sheets of the electrode, please see figure 2 , the filler is a porous insulating material, and there are holes on the metal platinum sheet, and the fluid can pass through the pores of the filler between the metal platinum sheet and the metal platinum sheet.

Embodiment 3

[0040] Example 3: Method for Measuring High-Pressure Fluid Phase State or Phase State Change in the Present Invention

[0041] Step 1: Load electrodes into the lower part of a 50ml high-pressure variable-volume kettle. The electrode material is a metal platinum sheet with a size of 5mm×5mm and a thickness of 0.5mm. The distance between the metal platinum sheets is 4mm. The electrode constant was calibrated with standard potassium chloride aqueous solution. Before the experiment, put a stirring magnet in the kettle. with high pressure CO 2 Check sealing performance. And use CO 2 Replace the air in the kettle.

[0042] Step 2 adds 4.967 grams of acetonitrile to the still with CO 2 The sampler added 31.79 grams of CO to the kettle 2 . The content of acetonitrile in the kettle is 0.143 mole fraction, CO 2 The content is 0.857 mole fraction.

[0043] Step 3: Connect the conductivity display device.

[0044] Step 4: Heat the autoclave, control the system temperature to 5...

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Abstract

The invention provides a device and a method for measuring the phase state or phase state variation of high-pressure fluid. The device comprises an electrode, a conductivity display device and a high-pressure sealing device, wherein the electrode is arranged in the high-pressure fluid and used for measuring the conductivity of the high-pressure fluid; the conductivity display device is connected with the electrode through an insulated conductor and used for displaying the conductivity of the high-pressure fluid; and the high-pressure sealing device is used for fixing and sealing the electrode. According to the method, the electrode serves as a sensor, and the phase state and the phase state variation of the high-pressure fluid are traced by measuring the conductivity variation of the high-pressure fluid. By the method, the phase state of the high-pressure fluid in an intermittent state can be measured, in-situ detection can be carried out on the phase state of the high-pressure fluid, and in-situ tracing is carried out on the phase state of a dynamic system. The method has the function of remotely and quickly detecting the phase state of a high-pressure fluid system on line.

Description

technical field [0001] The invention relates to a device and method for measuring the phase state or phase change of high-pressure fluid. Background technique [0002] For high-pressure fluids, whether it is a system with a fixed composition (such as a pure substance or a mixture) or a system with a changed composition (such as a chemical reaction system), as the temperature and pressure change, the phase state of the system may change. Because the phase state of the system (gas phase, liquid phase, supercritical state, etc.) has a significant impact on the properties of the system, in the process of extraction, separation and chemical reaction, it is often necessary to control the phase state of the system according to the experimental requirements. Then it is very necessary for the measurement of the phase state of the system, or in-situ detection. This requires simple and convenient measurement or detection methods. [0003] The usual measurement methods are as follows:...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/06G01N27/07
Inventor 侯玉翠杨春梅
Owner TAIYUAN NORMAL UNIV