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Multiple-component lateral line thermal coupling rectification method

A process method and thermal coupling technology, applied in fractionation, chemical industry, distillation purification/separation, etc., can solve the problems of few practical applications and difficult to solve practical control problems, and achieve the effect of reducing energy consumption of rectification

Active Publication Date: 2012-08-22
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
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Problems solved by technology

Therefore, although this Petlyuk thermal coupling tower has been proposed for more than 30 years, it has been rarely used in practice, and the actual control problem is difficult to solve

Method used

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  • Multiple-component lateral line thermal coupling rectification method

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Embodiment Construction

[0014] The present invention includes forward sequence rectification and reverse sequence rectification process, as shown in Fig. 1, in described forward sequence rectification process, multiple component enters first rectification tower T101 as raw material, in the first rectification tower Light components are distilled from the top of T101, and the liquid phase mixture other than light components of the bottom distillate is used as the feed stream of the second rectification tower T102, and the light components are extracted from the side line of the first rectification tower T101 The mixture of points, as the newly added feed stream of the second rectifying tower T102 tower, its feed position is located above the original feed position; in the reverse sequence rectification process, the multicomponent enters the first Rectification tower T101, heavy components are distilled from the bottom of the first rectification tower T101, and the liquid phase mixture other than heavy ...

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Abstract

The invention relates to a multiple-component lateral line thermal coupling rectification method. A lateral line connection is added between two rectification towers, so that the rectification energy consumption can be greatly reduced. At least two rectification towers are adopted in the method, raw materials enter the first rectification tower, light components are rectified out on the top of the first tower, and intermediate components and heavy components are rectified out in a tower kettle and used as feeding materials for the second tower. An intermediate component and heavy component mixture containing a small amount of light components is extracted at the lateral line of the first tower, and the intermediate component content of the lateral line is obviously higher than the intermediate component content in the flow of the tower kettle, so that the back mixing degree of the intermediate components is reduced; the mixture is used as the newly added material for the second tower; and a feeding tower plate is positioned above the original feeding position. Compared with the conventional rectification method, the method has the advantage of obvious energy-saving effect. The method can be universally applied to the rectification separation process of the three-component, four-component or multi-component mixture.

Description

technical field [0001] The invention relates to a process method for multi-component side line thermal coupling rectification, and relates to a rectification process in chemical separation engineering, especially an energy-saving process method for rectification separation of ternary mixtures, which can be generally applied to three-component and four-component and the rectification separation process of multi-component mixtures. Background technique [0002] Distillation is a separation method commonly used in the chemical industry. For the mixed raw material containing light component A, intermediate component B and heavy component C, if the product of expected purity is obtained by rectification, two rectification towers (T1, T2) are required by conventional two-tower positive sequence separation process, Light components are distilled from the top of column T1, and intermediate component B and heavy component C flow into column T2 from the bottom of T1, and intermediate...

Claims

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Application Information

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IPC IPC(8): B01D3/14C07C7/04C07C15/04C07C15/06C07C15/08
CPCY02P20/50
Inventor 蔡智凌昊沈本贤
Owner CHINA PETROLEUM & CHEM CORP
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