Intermittent extraction and rectification apparatus and method with extractant continuously recovery device
A technology for extractive distillation and recovery equipment, which is applied to the intermittent extractive distillation process device and the separation field of intermittent extractive distillation, can solve the problems of large capacity limitation of the tower, low recovery efficiency, low separation efficiency, etc. The effect of limited volume and capacity of tower kettle, improved separation efficiency and high separation efficiency
Inactive Publication Date: 2006-08-23
TIANJIN UNIV
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[0002] At present, the conventional batch extractive distillation process is mainly completed by an extractive distillation tower, a condenser and a tower reactor. With the continuous addition of extractant during the operation, the liquid storage in the tower reactor continues to increase, which leads to the limitation of the tower reactor capacity. At the same time, with the continuous accumulation of high-boiling point extractant in the tower kettle, in order to maintain the stability of the rising vapor volume in the tower during the operation, it is necessary to constantly adjust the heating capacity of the tower kettle, which greatly increases the complexity of the operation control; due to the operation process The stability of the solvent is poor, which leads to the low separation efficiency of the process; for some processes that require a larger solvent ratio (the ratio of the amount of the extractant to the raw material liquid) to separate the system, the consumption of the extractant is too large and the recovery The efficiency is low, so it is of great practical significance to improve and innovate the conventional batch extractive distillation method
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[0018] The equipment of this device is described below in conjunction with accompanying drawing and further illustrates the present invention in conjunction with specific implementation method:
[0019] The description of its equipment is: the extraction agent constant temperature tank 2 is connected to two delivery pumps 1, one of which is connected to the rotameter 13 and connected to the upper part of the batch rectification tower, and the other delivery pump is connected to the constant temperature tank through the heat exchanger 3; The batch rectification column 14 is connected with the overhead fraction collection tank 8 at its top, and is connected to the middle part of the continuous rectification column 15 at the bottom of the column by a pipeline equipped with a shut-off valve 12, and the bottom of the column is connected to the continuous distillation column 15 through the heat exchanger 3 and The transfer pump connected to the constant temperature tank is connected ...
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The present invention relates to intermittent extraction and rectification apparatus and method with extractant continuously recovering device. The intermittent extraction and rectification apparatus with extractant continuously recovering device includes an intermittent rectification tower, a continuous rectification tower and pipeline with stop valve connected between the liquid collector in the bottom of the intermittent rectification tower and the middle part of the continuous rectification tower. Compared with conventional intermittent extraction and rectification apparatus and method, the present invention has the advantages of stable operation, great operation flexibility, high separating efficiency, etc. Owing the timely recovery and reuse of the extractant, the present invention is especially suitable for extraction and rectification process with hard-to-separate complicated chemical system and high solvent ratio requirement.
Description
technical field [0001] The invention relates to a batch extraction rectification process device and a method thereof with extractant continuous recovery equipment, belonging to the separation technology of batch extraction rectification. Background technique [0002] At present, the conventional batch extractive distillation process is mainly completed by an extractive distillation tower, a condenser and a tower reactor. With the continuous addition of extractant during the operation, the liquid storage in the tower reactor continues to increase, which leads to the limitation of the tower reactor capacity. At the same time, with the continuous accumulation of high-boiling point extractant in the tower kettle, in order to maintain the stability of the rising vapor volume in the tower during the operation, it is necessary to constantly adjust the heating capacity of the tower kettle, which greatly increases the complexity of the operation control; du...
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Inventor 华超白鹏李鑫钢徐世民赵丽娟
Owner TIANJIN UNIV