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Material system intermittent extracting and rectifying method reaching solvent boiling point higher than that of material by single tower and double-still

A technology for extractive distillation and extractive distillation column, which is applied to extractive distillation and other directions, can solve the problems of increasing operation complexity and energy consumption, difficult to meet the solvent accumulation amount, and small equipment operation flexibility, so as to achieve good equipment operation flexibility and increase The effect of stable steam volume and stable gas flow rate

Inactive Publication Date: 2005-10-05
TIANJIN UNIV
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Problems solved by technology

[0002] At present, the conventional conventional batch extractive distillation method is mainly completed by an extractive distillation tower and a tower reactor. During the operation, the solvent is continuously added, and the amount of liquid stored in the tower reactor will continue to increase, thus bringing a series of problems: the tower reactor It is difficult to meet the cumulative amount of solvent with a large capacity, so the amount of solvent is greatly limited, and the operation flexibility of the equipment is small; with the accumulation of solvent in the tower kettle, the boiling point of the kettle liquid will continue to rise, and it is necessary to maintain a stable rising vapor in the tower kettle It is necessary to adjust the heating capacity of the tower kettle at any time, which makes it difficult to keep the process stable and increases the complexity of operation and energy consumption

Method used

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  • Material system intermittent extracting and rectifying method reaching solvent boiling point higher than that of material by single tower and double-still

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Embodiment

[0012] use as figure 1 The shown one-tower and two-tank extractive distillation device realizes the process of intermittent extraction, rectification and separation of industrial ethanol with a mass percentage of 95% as follows: the inner diameter of the extractive distillation tower is φ30mm, and a φ3×3 θ mesh ring stainless steel packing is installed inside. The height of the packing in the recovery section is 200mm, the packing in the extraction and rectification section is 1000mm, the heat source is heat transfer oil, the cooling medium is circulating cooling water, and the operating pressure is normal pressure. 95% industrial ethanol is put into the material kettle at one time by mass percentage. Now close the valve between the solvent tank and the extractive distillation tower to cut off the communication between the two, keep the connection between the extractive distillation tower and the material tank, heat the material tank to 79°C-81°C, and perform total reflux oper...

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Abstract

The present invention discloses a single-tower double-kettle system interrupted extraction rectification method capable of implementing that the boiling point of solvent is higher than that of material. The described single tower is extraction rectification tower whose interior is equipped with filler recovery section and extraction rectification filler section, and the double-kettle comprises solvent kettle and material kettle which are connected with bottom portion of extraction rectification tower. Said invention also provides the concrete steps of said system interrupted extraction rectification method.

Description

technical field [0001] The invention relates to a batch extraction and rectification method in which the boiling point of a solvent is higher than that of a material in a single tower and two kettles, and belongs to the batch extraction and rectification technology. Background technique [0002] At present, the conventional conventional batch extractive distillation method is mainly completed by an extractive distillation tower and a tower reactor. During the operation, the solvent is continuously added, and the amount of liquid stored in the tower reactor will continue to increase, thus bringing a series of problems: the tower reactor It is difficult to meet the cumulative amount of solvent with a large capacity, so the amount of solvent is greatly limited, and the operation flexibility of the equipment is small; with the accumulation of solvent in the tower kettle, the boiling point of the kettle liquid will continue to rise, and it is necessary to maintain a stable rising ...

Claims

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Application Information

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IPC IPC(8): B01D3/40
Inventor 白鹏朱良伟华超赵丽娟
Owner TIANJIN UNIV
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