CN219050366U - Continuous separation device - Google Patents
Continuous separation device Download PDFInfo
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- CN219050366U CN219050366U CN202223507871.1U CN202223507871U CN219050366U CN 219050366 U CN219050366 U CN 219050366U CN 202223507871 U CN202223507871 U CN 202223507871U CN 219050366 U CN219050366 U CN 219050366U
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Abstract
The utility model relates to the technical field of continuous extraction, rectification and separation of azeotropic mixtures, in particular to a continuous separation device, which comprises a first extraction rectifying tower and a second extraction rectifying tower which are connected through pipelines, wherein the bottoms of the first extraction rectifying tower and the second extraction rectifying tower are connected with an extractant recovery tower through pipelines, and the tops of the second extraction rectifying tower and the extractant recovery tower are respectively connected with a first product tank and a second product tank through pipelines.
Description
Technical Field
The utility model relates to the technical field of continuous extraction, rectification and separation of azeotropic mixtures, in particular to a continuous separation device.
Background
Extractive distillation is a special distillation separation technology, and is suitable for the separation of azeotropic systems. The separation is achieved by continuously adding an extractant to the top of the rectifying column to change the relative volatilities of the original components. The continuous extractive distillation has the advantages of combining continuous distillation and extractive distillation, has the characteristics of flexible operation, high separation capacity, high efficiency and the like, and is suitable for separating large-batch azeotropic systems and near-boiling systems. Patent CN105175280a discloses a continuous extractive distillation separation method of acetonitrile-tert-butanol azeotropic mixture, which adopts a common double-tower reflux process, and in the process, an extractant is added into a kettle at one time. There are major problems: because the continuous operation period is longer, part of the extractant can run off along with the extraction of the product, so that the content of the extractant in the system is continuously reduced, and the quality of the product is difficult to ensure stability.
Disclosure of Invention
In order to solve the above problems, the present utility model provides a continuous separation apparatus.
The technical scheme adopted by the utility model is as follows: the utility model provides a continuous separation device, includes first extraction rectifying column and the second extraction rectifying column of pipe connection, the bottom of first extraction rectifying column and second extraction rectifying column is through the extractant recovery tower of pipe connection, the second extraction rectifying column with the top of extractant recovery tower is pipe connection first product jar and second product jar respectively.
Preferably, the bottoms of the extractant recovery towers are respectively connected with the first extraction rectifying tower and the second extraction rectifying tower through pipelines.
Preferably, the bottoms of the first extraction rectifying tower, the second extraction rectifying tower and the extractant recovery tower are respectively connected with a reboiler.
Preferably, the number of the tower plates of the first extraction rectifying tower is 25-30, the feeding position of the extractant is 1-5 tower plates, and the feeding position of the raw material is 5-10 tower plates.
Preferably, the number of the tower plates of the first extraction rectifying tower is 20-25, the feeding position of the extractant is 1-5 tower plates, and the feeding position of the raw material is 15-20 tower plates.
The beneficial effects are that: compared with the prior art, the continuous separation device provided by the utility model has the advantages that the azeotropic system of acetonitrile-benzene is destroyed by adopting the extractant with high boiling point, and continuous extraction and rectification are carried out by adopting a mode of adding the extractant for the second time, so that the condition that the quality of a product is unstable due to the fact that the content of the extractant in the system is continuously reduced is effectively avoided, high-purity acetonitrile and benzene are separated, the operation difficulty is low, the separation effect is good, and the yield is high.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
Detailed Description
The present utility model will be described in detail below with reference to the drawings and detailed description to enable those skilled in the art to better understand the technical scheme of the present utility model.
As shown in fig. 1, a continuous separation device comprises a first extractive distillation column 1 and a second extractive distillation column 2 which are connected through pipelines, wherein bottoms of the first extractive distillation column 1 and the second extractive distillation column 2 are connected with an extractant recovery column 3 through pipelines, and tops of the second extractive distillation column 2 and the extractant recovery column 3 are respectively connected with a first product tank 4 and a second product tank 5 through pipelines. Specifically, extracting agent and raw materials are added from the upper part of the first extraction rectification, tower top steam enters the lower part of the second extraction rectification tower, extracting agent is added from the upper part of the second extraction rectification tower, and acetonitrile extracted from the tower top of the second extraction rectification tower enters a first product tank; benzene-extractant extracted from the bottoms of the first extraction rectifying tower and the second extraction rectifying tower enters an extractant recovery tower, and benzene extracted from the top of the extractant recovery tower enters a second product tank, so that the energy consumption can be remarkably reduced, and the separation effect can be improved.
In this embodiment, the bottoms of the extractant recovery tower 3 are respectively connected to the first extractive distillation tower 1 and the second extractive distillation tower 2 through pipelines. Specifically, the extractant extracted from the bottom of the extractant recovery tower is circularly and continuously added into the first extraction rectifying tower and the second extraction rectifying tower, so that the purpose of continuous rectifying and separating is achieved.
In this embodiment, the bottoms of the first extractive distillation column 1, the second extractive distillation column 2 and the extractant recovery column 3 are respectively connected with a reboiler 6. Specifically, the reflux is maintained at the tops of the extractive distillation column and the extractant recovery column.
In this embodiment, the number of trays in the first extractive distillation column 1 is 25-30, the feeding position of the extractant is 1-5 th tray, and the feeding position of the raw material is 5-10 th tray. Specifically, the feed ratio of extractant to raw materials was maintained at 3:5.
In this embodiment, the number of trays in the first extractive distillation column 1 is 20-25, the feeding position of the extractant is 1-5 th tray, and the feeding position of the raw material is 15-20 th tray. Specifically, the feed ratio of extractant to raw materials was maintained at 1:4.
Finally, it should be noted that the above description is only a preferred embodiment of the present utility model, and that many similar changes can be made by those skilled in the art without departing from the spirit and scope of the utility model as defined in the appended claims.
Claims (4)
1. A continuous separator, characterized in that: including first extraction rectifying column (1) and second extraction rectifying column (2) of pipe connection, the bottom of first extraction rectifying column (1) and second extraction rectifying column (2) is through pipe connection extractant recovery tower (3), second extraction rectifying column (2) with the top of extractant recovery tower (3) is pipe connection first product jar (4) and second product jar (5) respectively, the tower bottom of first extraction rectifying column (1), second extraction rectifying column (2) and extractant recovery tower (3) is connected with reboiler (6) respectively.
2. A continuous separation apparatus according to claim 1, wherein: the bottoms of the extractant recovery towers (3) are respectively connected with the first extraction rectifying tower (1) and the second extraction rectifying tower (2) through pipelines.
3. A continuous separation apparatus according to claim 1, wherein: the number of the tower plates of the first extraction rectifying tower (1) is 25-30, the feeding position of the extractant is 1-5 tower plates, and the feeding position of the raw material is 5-10 tower plates.
4. A continuous separation apparatus according to claim 1, wherein: the number of the tower plates of the first extraction rectifying tower (1) is 20-25, the feeding position of the extractant is 1-5 tower plates, and the feeding position of the raw material is 15-20 tower plates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223507871.1U CN219050366U (en) | 2022-12-28 | 2022-12-28 | Continuous separation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223507871.1U CN219050366U (en) | 2022-12-28 | 2022-12-28 | Continuous separation device |
Publications (1)
| Publication Number | Publication Date |
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| CN219050366U true CN219050366U (en) | 2023-05-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202223507871.1U Active CN219050366U (en) | 2022-12-28 | 2022-12-28 | Continuous separation device |
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| CN (1) | CN219050366U (en) |
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- 2022-12-28 CN CN202223507871.1U patent/CN219050366U/en active Active
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