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Extractive Distillation Divided Column Body

A technology of extractive distillation and separation tower, applied in the direction of extractive distillation, etc., can solve the problems of high energy consumption and complex process, and achieve the effect of simple process, good technical effect and energy saving effect.

Active Publication Date: 2014-10-15
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the current extractive distillation process needs to be realized by two towers, an extractive distillation tower and a solvent recovery tower, and there are problems of complicated process and high energy consumption. A new extractive distillation separation tower body is provided, and the method has the advantages of The characteristics of simple process and low energy consumption

Method used

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  • Extractive Distillation Divided Column Body
  • Extractive Distillation Divided Column Body
  • Extractive Distillation Divided Column Body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] according to figure 1 The extractive distillation partition tower body shown, the theoretical plate number of the common stripping section of the separated rectification tower is 10, the theoretical plate number of the extractive distillation interval is 20 (the theoretical plate number of the extractive distillation section is 15), and the theoretical plate number of the separated rectification section is 15. The number of theoretical plates in the solvent recovery section is 5. The complex extractant is added from the extractant feed port with a flow rate of 10 ml / min, and the mixture of acetic acid and water (71.13% by weight of water, 28.87% by weight of acetic acid) is added from the raw material feed port with a flow rate of 10 ml / min. The extractive distillation separation column operates under normal pressure, the reflux ratio is 1, the temperature at the top of the tower is controlled at 99.5-101.0°C, and the temperature at the bottom of the tower is controlle...

Embodiment 2

[0020] according to figure 1 The extractive distillation partition tower body shown, the theoretical plate number of the common stripping section of the separated rectification tower is 10, the theoretical plate number of the extractive distillation interval is 10 (the theoretical plate number of the extractive distillation section is 5), and the theoretical plate number of the separated rectification section is 10. The number of theoretical plates in the solvent recovery section is 3. The complex extractant is added from the extractant feed port with a flow rate of 10 ml / min, and the mixture of acetic acid and water (71.13% by weight of water, 28.87% by weight of acetic acid) is added from the raw material feed port with a flow rate of 10 ml / min. The extractive distillation separation column is operated under normal pressure, the reflux ratio is 1.5, the temperature at the top of the tower is controlled at 99.5-101.0°C, and the temperature at the bottom of the tower is contr...

Embodiment 3

[0022] according to figure 1 The extractive distillation partition tower body shown, the theoretical plate number of the common stripping section of the divided rectification tower is 30, the theoretical plate number of the extractive distillation interval is 40 (the theoretical plate number of the extractive distillation section is 20), and the theoretical plate number of the separated rectification section is 40, the number of theoretical plates in the solvent recovery section is 10. The complex extractant is added from the extractant feed port with a flow rate of 10 ml / min, and the mixture of acetic acid and water (71.13% by weight of water, 28.87% by weight of acetic acid) is added from the raw material feed port with a flow rate of 10 ml / min. The extractive distillation separation column operates under normal pressure, the reflux ratio is 0.5, the temperature at the top of the tower is controlled at 99.5-101.0°C, and the temperature at the bottom of the tower is controll...

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Abstract

The invention relates to an extractive distillation separation tower body, which mainly solves the problems that an extractive distillation tower and a solvent recovery tower are needed to implement the conventional extractive distillation process, processes are complicated and energy consumption is high. The extractive distillation separation tower body comprises an extracting agent inlet, a raw material inlet, a tower top inlet, a tower top outlet, a tower bottom inlet, a tower bottom outlet, a rectifying section inlet, a rectifying section outlet, a separation plate, a solvent recovery section, an extractive distillation section, a rectifying section and a public stripping section, wherein the separation plate in the extractive distillation separation tower body separates a tower into the solvent recovery section, an extractive distillation range, the rectifying section and the public stripping section; in the extractive distillation range, an area between the upper side of the raw material inlet and the lower side of the extracting agent inlet is an extractive rectifying section; an area between the lower side of the raw material inlet and the bottom of the separation plate is an extractive stripping section; an area among the extracting agent inlet, the tower top inlet and the tower top outlet is an extracting agent recovery section; an area among the bottom of the separation plate, the tower bottom inlet and the tower bottom outlet is the public stripping section; and the other side of the raw material inlet in an area where the separation plate is positioned is provided with the rectifying section. Through the technical scheme, the problems are well solved, and the method can be used in the industrial application of extractive distillation.

Description

technical field [0001] The invention relates to a tower body of an extraction distillation separation tower. Background technique [0002] Extractive distillation is an important industrial process, which usually means adding a substance (solvent) with a lower volatility than the separated component (usually a homogeneous liquid mixture with a close boiling point) to the separated system to change the relative Volatility. Selecting a suitable solvent can increase the relative volatility between the separated components, so that the difficult-to-separate system can be converted into an easily separated system, and the separation cost can be reduced. Therefore, extractive distillation can The separation of the system and the azeotrope is a very potential operation process. With the rapid development of petrochemical industry in recent years, it is required to make full use of various materials, and the requirements for the purity of raw materials and products are also continuo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D3/40
Inventor 钟禄平肖剑张惠明
Owner CHINA PETROLEUM & CHEM CORP