Pressure controlling system and pressure control method for low pressure phase equilibrium experiment device

Abstract

According to the pressure controlling system and the pressure control method for low pressure phase equilibrium experiment device provided by the invention, the pressure of an experiment system and the pressure of an buffer system are controlled separately, fluctuations of the pressure of the experiment system caused by frequent actions of the pressure controlling system are avoided, and the working pressure of the experiment system is more stable; in addition, due to the existence of the pressure buffer system and the adjustable pressure, continuous operation of different horizontal pressurevapor-liquid phase equilibrium experiment measurement is realized by combining the pressure controlling system provided by the invention with the experiment system.

Description

technical field [0001] The invention relates to the field of experimental data testing in the fields of petroleum, chemical and metallurgical industries, in particular to a pressure control system and a pressure control method of a low-pressure phase balance experimental device. Background technique [0002] The fluid phase equilibrium property is an indispensable basic physical property for the design, operation, control and optimization of industrial processes. It determines the correctness and accuracy of process simulation calculations. For example, in the calculation of separation towers, the theoretical plate number of distillation towers Important parameters such as the operating reflux ratio are closely related to the phase equilibrium properties, and rectification, extraction, absorption, and leaching are the basic unit operations of industrial processes, and any research on them must be based on the phase equilibrium properties of the corresponding system. [0003]...

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Problems solved by technology

For the low-pressure system (that is, the internal pressure of the experimental system is lower than the atmospheric pressure), it is necessary to consider how to keep the pressure constant, how to collect samples, and how to reduce external disturbances, etc., and the stable control system pressure has become the most important issue in the development of low-pressure systems. Because in phase equilibrium, the pressure and temperature of the equilibrium system are mutually restricted, small fluctuations in pressure will inevitably cause fluctuations in temperature, which will directly affect the stability of the fluid phase equilibrium experimental system and the accuracy of data measurement

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