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Isobaric gas-liquid equilibrium measuring device

A measuring device and balanced technology, applied in the direction of laboratory equipment, investigation stage/state change, chemical instruments and methods, etc., can solve problems such as overheating and bumping, non-equilibrium vaporization, experimental failure, etc., to prevent overheating and bumping , Eliminate concentration gradients, improve accurate results

Inactive Publication Date: 2010-06-09
SUN YAT SEN UNIV
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AI Technical Summary

Problems solved by technology

[0004] 1. The Dvorak-Boublik kettle without stirring function cannot solve the concentration gradient problem in the kettle well; the Dvorak-Boublik kettle with stirring function leads to the non-equilibrium vaporization problem, and it is difficult to obtain a gas phase that truly represents the gas-liquid equilibrium composition sample
[0005] 2. The heating area of ​​the rod-shaped heater in the Dvorak-Boublik kettle is small, which is prone to problems such as overheating and bumping, resulting in inaccurate test data and even test failure
[0006] 3. The insulation effect of the Dvorak-Boublik kettle is poor, and the gas phase is prone to partial condensation, which affects the accuracy of the measurement results

Method used

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Examples

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Embodiment 1

[0021] Embodiment 1 is a measurement experiment of water-ethanol system gas-liquid equilibrium data.

[0022] When using the device of this embodiment to carry out the gas-liquid equilibrium measurement experiment, add 100ml of pure ethanol to the heating kettle through the grinding port of the mixer 6, add 150ml of pure water in the feed funnel 9, connect the circulating water, and turn on the magnetic stirrer 16 power supply , adjust the heating voltage until the kettle liquid can boil stably, adjust the system pressure to 101.3kPa through the pressure controller, and then start the measurement experiment of the gas-liquid equilibrium data of the water-ethanol system.

[0023] During the experiment, the gas-liquid two-phase in the gas-liquid equilibrium tank circulates continuously in the three loops, fully mixing and contacting. After 2 hours, the reflux in the gas-phase condenser is stable, and the temperature of the gas-liquid mixture is stable for 30 minutes, which means...

Embodiment 2

[0024] Embodiment 2 is the determination experiment of water-acetic acid system gas-liquid equilibrium data.

[0025] When using the device of this embodiment to carry out the gas-liquid equilibrium measurement experiment, add 100ml of pure acetic acid to the heating kettle through the grinding port of the mixer 6, connect the feeding funnel 9 and other devices, add 150ml of pure water in the feeding funnel 9, and turn on the circulation Water, turn on the power supply of the magnetic stirrer 16, adjust the system pressure to 101.3kPa through the pressure controller, adjust the heating voltage until the kettle liquid boils stably, and then start the measurement experiment of the gas-liquid equilibrium data of the water-acetic acid system.

[0026] During the experiment, the gas-liquid two-phase in the gas-liquid equilibrium tank circulates continuously in the three loops, fully mixing and contacting. After 2 hours, the reflux in the gas-phase condensing tube is stable, and whe...

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Abstract

The invention relates to an isobaric gas-liquid equilibrium measuring device, belongs to the field of thermodynamic data measurement, and consists of a gas-liquid equilibrium kettle and a pressure controller. When the device measures the gas-liquid equilibrium data, the liquid phase in the gas-liquid equilibrium kettle continuously circulates in three circulation loops and the gas phase is completely mixed and contacted with the liquid phase to fast achieve the equilibrium, so the isobaric gas-liquid equilibrium measuring device can ensure that the gas phase and the liquid phase samples can accurately represent the composition of the gas phase and the liquid phase during the gas-liquid equilibrium, and has the advantages of short measuring time, simple and convenient operation and accurate measuring result.

Description

technical field [0001] The invention relates to the field of measuring thermodynamic data, in particular to a measuring device for measuring gas-liquid equilibrium data under isobaric conditions. Background technique [0002] The gas-liquid equilibrium data are the basis of industrial distillation technology, simulation calculation, computer-aided design, physical property estimation and chemical process design improvement. In the current industrial situation where rectification technology is widely used, it is extremely important to obtain accurate gas-liquid equilibrium data. For the calculation of gas-liquid equilibrium, although many theoretical models can be used today, their accuracy and versatility are still quite limited, and they must be verified by experimental data before use. Therefore, the current experimental measurement method is still the most important and effective means to obtain accurate and reliable gas-liquid equilibrium data. [0003] The gas-liquid ...

Claims

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Application Information

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IPC IPC(8): G01N25/12B01L3/00
Inventor 陈清林胡松张冰剑冯志威高学农
Owner SUN YAT SEN UNIV
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