Method for changing distillation conditions of binary mixture system by using electrostatic field

An electrostatic field and mixture technology is applied in the field of changing the distillation conditions of a binary mixture system by using an electrostatic field, which can solve the problems of low distillation efficiency and high energy consumption, and achieve the effects of increasing the distillation rate, strengthening the distillation separation, and improving the separation efficiency.

Inactive Publication Date: 2021-08-03
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

[0004] In order to solve the problem of low distillation efficiency and high energy consumption caused by the limitation of gas-liquid balance in the operation of the existing distillation unit, the present invention provides a method for changing the distillation conditions of the binary mixture system by using an electrostatic field

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  • Method for changing distillation conditions of binary mixture system by using electrostatic field
  • Method for changing distillation conditions of binary mixture system by using electrostatic field
  • Method for changing distillation conditions of binary mixture system by using electrostatic field

Examples

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Embodiment 1

[0068] In this example, a methanol-ethanol binary mixture system is used for illustration.

[0069] The pressure is 15kPa, for the initial composition of the liquid phase x 1 =0.4 The mixture solution has a bubble point temperature of 302.46K and a dew point temperature of 304.30K when there is no electrostatic field. At an electric field strength of 8×10 7Under the action of V / m electrostatic field, when the angle between the applied direction of the electrostatic field and the phase interface is θ = 90°, that is, the direction of the electrostatic field is parallel to the phase interface, the bubble point temperature is 302.69K, an increase of 0.23K, an increase of 0.08%; dew point The temperature is 304.54K, an increase of 0.24K, an increase of 0.08%; when the angle between the direction of the electrostatic field and the phase interface is θ=0°, that is, the direction of the electrostatic field is perpendicular to the phase interface, the bubble point temperature is 302.4...

Embodiment 2

[0075] In this embodiment, the R32-R22 binary mixture system is selected for illustration.

[0076] The pressure is 200kPa, for the liquid phase initial composition x 1 =0.4 The mixed solution has a bubble point temperature of 241.98K and a dew point temperature of 243.50K without the action of an electrostatic field. At an electric field strength of 8×10 7 Under the action of V / m electrostatic field, when the angle between the applied direction of the electrostatic field and the phase interface is θ=90°, that is, when the direction of the electrostatic field is parallel to the phase interface, the bubble point temperature is 242.08K, an increase of 0.10K, an increase of 0.04%; dew point The temperature is 243.50K, an increase of 0.12K, an increase of 0.05%; when the angle between the direction of the electrostatic field and the phase interface is θ=0°, that is, the direction of the electrostatic field is perpendicular to the phase interface, the bubble point temperature is 2...

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Abstract

The invention belongs to the field of chemical thermodynamic engineering application, and relates to a method for changing distillation conditions of a binary mixture system by using an electrostatic field. An electrostatic field with the direction parallel to the phase interface is applied to the binary mixture system with certain composition, so that the temperature-composition phase diagram of the binary mixture system can move towards the temperature rising direction, and the bubble point temperature and the dew point temperature of the binary mixture system are increased compared with those of the binary mixture system without the action of the electrostatic field; under the determined pressure intensity, the temperature-composition phase diagram of the binary mixture system can move towards the temperature reduction direction by applying an electrostatic field with the direction perpendicular to the phase interface to the binary mixture system with certain composition, and the bubble point temperature and the dew point temperature of the binary mixture system are reduced compared with those of the binary mixture system without the action of the electrostatic field. The gas-liquid balance condition of the system is changed by providing smaller electric energy for the binary mixture system, so that the distillation efficiency is improved by utilizing an electrostatic field, the gas-liquid mass transfer separation process is enhanced, and the energy consumption is reduced.

Description

technical field [0001] The invention belongs to the application field of chemical engineering thermodynamics, and relates to a method for changing the distillation condition of a binary mixture system by using an electrostatic field. Background technique [0002] In industrial production, it is often necessary to separate products from miscible raw materials, intermediate products, by-products, etc. to meet the concentration standards required by industrial production, among which distillation or rectification is the most widely used separation technology for miscible liquid mixtures. Distillation separation is a thermodynamic separation process that uses the difference in volatility of each component between different mixtures to achieve separation through dynamic mass transfer between gas-liquid two-phase. It occupies a pivotal position in the industrial field due to its advantages of simple operation, wide application range, and no new impurities introduced during the ope...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D3/42B01D3/00B03C11/00
CPCB01D3/00B01D3/42B03C11/00
Inventor 韩光泽陈俊岩胡秋霞陈明东
Owner SOUTH CHINA UNIV OF TECH
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