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A decompression gas-liquid balance device with the function of automatic pressure control and sample measurement

A gas-liquid balancing and balancing device technology, applied in measuring devices, instruments, scientific instruments, etc., can solve problems such as difficulty in sampling, and achieve the effect of convenient and aggressive sample collection

Active Publication Date: 2020-06-23
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the above patents only provide the pressure control function to solve the problem of difficult sampling
However, it still does not solve the problem of excessive errors caused by pressure changes during the gas chromatograph injection process after sampling

Method used

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  • A decompression gas-liquid balance device with the function of automatic pressure control and sample measurement
  • A decompression gas-liquid balance device with the function of automatic pressure control and sample measurement
  • A decompression gas-liquid balance device with the function of automatic pressure control and sample measurement

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] (1) Detect the airtightness of the gas-liquid balance measuring device; (2) Add the solution H to be tested into the gas-liquid balance kettle 5 2 O+CH 3 OH+KCl system 50mL, set the system pressure to be detected through the gas pressure controller 16, close the inlet and sampling valves of the gas phase sampler 3 and the liquid phase sampler 14, open the vacuum pump 18 and the temperature controller 1; (3) Wait for the system After reaching the equilibrium state, turn on the power supply of the sampling controller 19, and the controller completes the sampling operation by controlling the sampling valves of the gas phase sampler 3 and the liquid phase sampler 14; (4) after the sampling operation is completed, the sampling controller 19 Control to open the micro-diaphragm vacuum pump 19-5, respectively complete the sampling operation for the gas phase sample in the gas phase sampler 3 and the liquid phase sample in the liquid phase sampler 14, and inject the sample into ...

Embodiment 2

[0048] (1) Detect the airtightness of the gas-liquid balance measuring device; (2) Add the solution H to be tested into the gas-liquid balance kettle 5 2 O+CH 3 OH+NaCl system 50mL, set the system pressure to be detected through the gas pressure controller 16, close the inlet and sampling valves of the gas phase sampler 3 and the liquid phase sampler 14, open the vacuum pump 18 and the temperature controller 1; (3) Wait for the system After reaching the equilibrium state, turn on the power supply of the sampling controller 19, and the controller completes the sampling operation by controlling the sampling valves of the gas phase sampler 3 and the liquid phase sampler 14; (4) after the sampling operation is completed, the sampling controller 19 Control to open the micro-diaphragm vacuum pump 19-5, respectively complete the sampling operation for the gas phase sample in the gas phase sampler 3 and the liquid phase sample in the liquid phase sampler 14, and inject the sample into...

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Abstract

The invention discloses a pressure reduction gas-liquid equilibrium device with automatic pressure control and sample test functions. A temperature controller is arranged in a gas-liquid equilibrium kettle; the gas-liquid equilibrium kettle is respectively connected with a gas phase sampler and a liquid phase sampler; an outlet of the sampler is connected with an inlet of a sample feeding and sampling controller; a minitype diaphragm vacuum pump is arranged in the sample feeding and sampling controller; an outlet of the minitype diaphragm vacuum pump is connected with an inlet of a gas chromatography detector; an outlet of the sampler and a gas phase outlet of a condensation pipe are connected with an inlet pipeline of a system vacuum pump; an electromagnetic valve is arranged on each of agas phase outlet pipeline and a liquid phase outlet pipeline; a pressure controller is arranged on the inlet pipeline of the system vacuum pump; a temperature controller controls the temperature through a thermocouple temperature detector and an electric heating rod; the pressure controller controls the pressure; the sample feeding and sampling controller respectively controls a switch of the electromagnetic valves. The control principle of air pressure in the kettle, air pressure in the sample feeding and sampling controller and the air pressure of a sampling pump is utilized; meanwhile, thegas chromatography is combined for realizing the goals of automatic pressure control and automatic detection of gas-liquid equilibrium.

Description

technical field [0001] The invention relates to gas-liquid balance measuring equipment in the principles of physical chemistry and chemical engineering, in particular to a decompression gas-liquid balance device with the functions of automatic pressure control and automatic sample measurement. Background technique [0002] The determination of gas-liquid equilibrium properties is the basis of chemical unit operations, simulation calculations, and process design, and has important research significance for chemical production. At present, the methods for measuring the gas-liquid equilibrium of the solution system mainly include the constant pressure method and the constant temperature method. The constant temperature method is to set the temperature of the container and wait until the system reaches equilibrium, read the vapor pressure value and measure the composition of the gas and liquid phases. The balance of this method It takes a long time and requires high-vacuum and l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/20
CPCG01N30/20
Inventor 王宗花徐显朕
Owner QINGDAO UNIV
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