Dependence of External and Internal Energy-Saving for Rectification of Binary Mixtures

Захаров, М. К.; Shvets, A. A.

doi:10.32362/2410-6593-2016-11-1-40-44

Fine Chem. Tech.

2016

DOI: 10.32362/2410-6593-2016-11-1-40-44

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Dependence of External and Internal Energy-Saving for Rectification of Binary Mixtures

М. К. Захаров

A. A. Shvets

Abstract: The comparison of energy consumption for rectification of binary mixtures in one-column and twocolumn apparatuses was carried out with the use of vapor flow energy from the first column for heating the second column. It is shown that the expected two-fold reduction of the flow of heat energy is impossible due to the decrease of the internal energy-saving.

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2018

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Selecting the Optimum Scheme of the Separation of Hydrocarbon Gases by Distillation

Захаров

Boychuk

2018

Fine Chem. Tech.

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The heat costs in distillation columns were determined for the purpose of separating a four-component gas mixture in gas fractionators with various component selection sequences. A method for selecting the optimal scheme was developed. It is based on the concept of “internal energy saving” upon rectification. Internal energy saving means multiple steam operation on the plates of a distillation column, namely, its condensation on each plate with the release of the heat of condensation, which is used for the evaporation of the liquid entering the plate to obtain a new steam composition. It was shown that when binary and three-component mixtures are separated and products of equal purity are obtained, the heat costs are related to the internal energy saving. The calculation of the internal energy saving in a three-column system for the separation of a four-component mixture was carried out. The calculation confirms that, as the internal energy saving increases and, accordingly, the average internal energy saving in the system of columns increases, the total heat consumption is reduced. The results of calculating three separation schemes of the four-component mixture were compared using the program Aspen Plus with different methods for describing the phase equilibrium (NRTL, Peng-Robinson, Chao-Seader) was carried out. It was shown that the calculations with the use of Peng-Robinson and Chao-Seader methods match.

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Selecting the Optimum Scheme of the Separation of Hydrocarbon Gases by Distillation

Захаров

Boychuk

2018

Fine Chem. Tech.

Self Cite

View full text Add to dashboard Cite

show abstract

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Dependence of External and Internal Energy-Saving for Rectification of Binary Mixtures

Cited by 1 publication

References 1 publication

Selecting the Optimum Scheme of the Separation of Hydrocarbon Gases by Distillation

Selecting the Optimum Scheme of the Separation of Hydrocarbon Gases by Distillation

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