A continuous flow high temperature and high pressure experimental device

Abstract

The invention relates to a continuous flowing type high temperature and high pressure experiment device. The continuous flowing type high temperature and high pressure experiment device comprises an accumulator still, a three-cycle high pressure phase equilibrium still, a separation kettle, a solvent storage tank, a first zero leak pump, a second zero leak pump, a third zero leak pump, a fourth zero leak pump, a vacuum device, a first six-way transfer valve, a second six-way transfer valve and an online analysis system. The provided continuous flowing type high temperature and high pressure experiment device is suitable for the phase equilibrium of a multicomponent system, supercritical fluid extraction, and measurement of various experimental data in high temperature and high pressure chemical reactions, a phase equilibrium sample truly representing the state is acquired, the balance time is short, the balance composition, the balance temperature and the balance pressure are accurately measured, and the experiment operation is simple and convenient.

Description

technical field [0001] The invention relates to the fields of thermodynamic phase equilibrium, reaction engineering, chemical mass transfer and chemical separation, in particular to a continuous flow high temperature and high pressure experimental device. Background technique [0002] The phase equilibrium relationship is the basic data of chemical unit operations such as distillation and absorption, and is also the basis for physical property estimation, simulation calculation, computer-aided design, chemical process optimization and equipment improvement. It is of great significance to chemical theoretical research and practical application. At present, the phase equilibrium data are mainly obtained through experimental measurement and theoretical calculation. However, due to the lack of corresponding physical parameters, it is difficult to obtain the phase equilibrium data of many substances directly by theoretical calculation. Therefore, the experimental measurement metho...

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Problems solved by technology

The experimental device adopted by the distillation method is simple and easy to operate, but it needs a large amount of liquid to measure, and it is easy to produce steam condensation and overheating of the boiling liquid during the operation, resulting in large errors; Destroy the balance in the equilibrium tank, but it is limited to the determination of the system with a short time to achieve equilibrium, and the scope of application is narrow; the experimental equipment used in the static method is simple, but the balance reached in the balance tank will be destroyed to a certain extent during the sampling process state, and the reagent consumption is large, and the equilibrium time is long; the bubble dew point method can be used for the phase equilibrium data determination of multi-components, without analyzing the composition, but the accuracy is low, and the equilibrium time is long; the circulation method, especially the vapor-liquid double cycle The phase equilibrium kettle is not only beneficial to reduce the equilibrium time, but also can obtain samples that can accurately represent the real equilibrium state.

[0004] CN 200910193714.8 and CN 200910193713.3 are based on the Dvorak-Boublik kettle, and branch pipes are respectively drawn from the upper and lower parts of the boiling kettle of the Dvorak-Boublik kettle to connect with the stirring chamber to form a liquid phase internal circulation loop, which is connected with the liquid phase reflux and gas phase condensate of the original equipment The circulation forms three internal circulation loops together, and the equilibrium time is short; but because the vapor phase circulation is realized by its own phase change, the liquid phase reflux liquid needs to be cooled, so the device is only suitable for the phase equilibrium data of the system with relatively low volatility Determination, and it is impossible to obtain an accurate two-phase sample that can accurately represent the real equilibrium state, and the measurement results cannot truly reflect the equilibrium state

[0005] CN 201120229585.6 is based on two vapor-liquid balance tanks with internal circulation loops, including a vapor-phase riser, a vapor-liquid separator, a still and a temperature control cabinet. The heat preservation effect is good, and the temperature control is also accurate. It is suitable for relative volatility Determination of phase equilibria data for smaller systems, and it is not possible to obtain a two-phase sample that accurately represents the true equilibrium state

[0006] CN 201310109090.3 is based on a stainless steel visual balance kettle with constant volume, and further optimizes and improves the feeding system and sampling system. The data collection is simple, but it is only suitable for liquid-liquid two-phase equilibrium data determination, and cannot be quickly achieved. Phase Equilibrium of Mixed Systems

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