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Method for rapidly calculating gas concentration of distillation column

A gas concentration and fast calculation technology, applied in calculation, special data processing applications, instruments, etc., can solve the problems of difficult detection, small range of pressure and temperature changes, and inconvenient calculation by table lookup, so as to achieve difficult detection and improve Computational Efficiency Effects

Inactive Publication Date: 2018-11-23
HANGZHOU DIANZI UNIV
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Problems solved by technology

In the prior art, the gas concentration value under certain temperature and pressure conditions is generally obtained by detection or table lookup, thereby calculating the number of theoretical plates, and then calculating the efficiency of the whole column according to the number of theoretical plates. However, due to the small range of pressure and temperature, Rapid changes, the pressure / temperature gas concentration table cannot be fully listed, and because the detection is relatively difficult, the look-up table method is also inconvenient for calculation, resulting in low efficiency in the calculation of theoretical plate number and total column efficiency

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  • Method for rapidly calculating gas concentration of distillation column
  • Method for rapidly calculating gas concentration of distillation column
  • Method for rapidly calculating gas concentration of distillation column

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Embodiment Construction

[0022] The technical solution of the present invention will be further specifically described below through specific examples.

[0023] A fast calculation method for gas concentration in a rectification tower:

[0024] (1) Obtain the pressure and temperature of the rectification section and the stripping section;

[0025] (2) Obtain the gas concentration under the corresponding pressure and temperature by means of table lookup or measurement;

[0026] (3) Construct a multiple regression model about gas concentration under pressure and temperature;

[0027] Multiple regression model for gas concentration under pressure and temperature: Y=Xβ,

[0028] in,

[0029] x i Indicates pressure, z i means x i temperature under pressure, y i is the corresponding pressure x i and temperature z i Under the gas concentration, β is the regression parameter.

[0030] (4) Use the least squares method to estimate the estimated value of the regression parameters, including:

[0031]...

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Abstract

A method for rapidly calculating gas concentration of distillation column comprises the following steps: firstly, obtaining the pressure and temperature of a rectification section and a stripping section; obtaining the gas concentration corresponding to the pressure and temperature by means of look-up or measurement; constructing a multivariate regression model of the pressure and temperature withrespect to the gas concentration; calculating an estimated value of the regression parameter by using least square method; and substituting the estimated value of the regression parameters into a multivariate regression model, so as to obtain a calculation formula of the gas concentration.

Description

technical field [0001] The invention relates to rectification tower efficiency calculation, in particular to a method for fast calculation of rectification tower gas concentration. Background technique [0002] A rectification tower is a tower-type vapor-liquid contact device for rectification. Utilizing the different volatility of each component in the mixture, that is, the property that the vapor pressure of each component is different at the same temperature, the light components (low boilers) in the liquid phase are transferred to the gas phase, and the light components in the gas phase are transferred to the gas phase. The heavy components (high boilers) are transferred to the liquid phase, thus achieving the purpose of separation. Distillation column is also a mass transfer and heat transfer device widely used in petrochemical production. [0003] The rectification tower is heated at the bottom of the tower to generate rising steam in the tower; the top of the tower ...

Claims

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Application Information

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IPC IPC(8): G06F19/00
Inventor 葛铭裘虹飞郑松郑小青魏江
Owner HANGZHOU DIANZI UNIV
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