CN210021247U - Dealkynol device in isoprene production process - Google Patents
Dealkynol device in isoprene production process Download PDFInfo
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- CN210021247U CN210021247U CN201920790228.3U CN201920790228U CN210021247U CN 210021247 U CN210021247 U CN 210021247U CN 201920790228 U CN201920790228 U CN 201920790228U CN 210021247 U CN210021247 U CN 210021247U
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Abstract
A device for removing alkynes in an isoprene production process belongs to the technical field of isoprene purification, and particularly relates to a device for removing alkynes in an isoprene production process. The utility model provides a dealkylation device in isoprene production technology. The utility model comprises an extraction tower A and an extraction tower B, and has the structural key points that a feed inlet of the extraction tower A is arranged in the middle of the extraction tower A, a first outlet of a tower kettle of the extraction tower A is connected with a lower inlet of a reboiler through a tower kettle circulating pump, and an upper outlet of the reboiler is connected with a circulating return port at the lower part of the extraction tower A; a second outlet of the tower A of the extraction tower is connected with an inlet of the desorption tower through a kettle extraction pump; the gas phase outlet at the top of the extraction tower A is connected with the gas phase port at the bottom of the extraction tower B, and the gas phase outlet at the bottom of the extraction tower B is connected with the circulating return port at the upper part of the extraction tower A through an internal circulating pump.
Description
Technical Field
The utility model belongs to the technical field of the isoprene purification, especially, relate to a take off alkyne device in isoprene production technology.
Background
The cracking carbon five is an important byproduct in the ethylene industry, wherein isoprene is the most value-added product in the cracking carbon five, and the high-purity isoprene is mainly used for producing high-grade isoprene rubber and has better chemical properties and physical properties than natural rubber. Therefore, an alkyne removing device in an isoprene production process is needed to improve the purity of isoprene.
Disclosure of Invention
The utility model provides a to above-mentioned problem, provide a take off alkyne device in isoprene production technology.
In order to realize the purpose, the utility model adopts the following technical scheme that the extraction tower comprises an extraction tower A and an extraction tower B, and has the structural key point that a feed inlet of the extraction tower A is arranged in the middle of the extraction tower A, a first outlet of a tower kettle of the extraction tower A is connected with a lower inlet of a reboiler through a tower kettle circulating pump, and an upper outlet of the reboiler is connected with a circulating return port at the lower part of the extraction tower A;
a second outlet of the tower A of the extraction tower is connected with an inlet of the desorption tower through a kettle extraction pump;
the tower top gas phase outlet of the extraction tower A is connected with the tower kettle gas phase port at the lower part of the extraction tower B, and the tower kettle outlet of the extraction tower B is connected with the circulating return port at the upper part of the extraction tower A through an internal circulating pump;
the gas phase outlet at the top of the extraction tower B is connected with the inlet of a heat exchanger, the outlet of the heat exchanger is connected with the inlet of a reflux tank, the outlet of the reflux tank is connected with the inlet of a reflux pump, the outlet of the reflux pump is connected with a first connector of a tee joint, a second connector of the tee joint is connected with a reflux port at the upper part of the extraction tower B through a valve, and a third connector of the tee joint is connected with a product tank through a valve;
the upper part of the extraction tower B is provided with an extraction solvent inlet.
As a preferred scheme, the reboiler adopts fixed tube sheet heat exchanger.
As another preferred scheme, the utility model extraction tower A and extraction tower B are tray extraction tower.
Secondly, the tower tray quantity of extraction column A and extraction column B is 78 pieces.
In addition, the feed inlet of the extraction tower A of the utility model is arranged at the 27 th tray of the extraction tower A, and the circulating return port of the extraction tower A is arranged at the 1 st tray of the extraction tower A; the position of an extraction solvent inlet of the extraction tower B is arranged at the position of a 9 th tray of the extraction tower B, and the position of a reflux opening of the extraction tower B is arranged at the position of a 1 st tray of the extraction tower B.
The utility model has the advantages of.
The utility model discloses extraction tower B upper portion is provided with the extraction solvent import, and the alkyne in accessible extraction solvent separates out isoprene, reduces alkyne content in the isoprene.
The utility model discloses an extraction tower A and extraction tower B combination extraction process units can reduce tower equipment design height, reduce equipment manufacturing, installation, operational risk.
The utility model discloses extraction tower B upper portion sets up the import of extraction solvent, and extraction solvent can extract the separation overall process, improves the total separation efficiency of isoprene and alkyne, and isoprene takes off alkyne effectual.
The utility model discloses the reboiler is the system heating power energy, and extraction tower cauldron adoption material cyclic utilization is energy-conserving. Is environment-friendly.
Drawings
The present invention will be further described with reference to the accompanying drawings and the following detailed description. The scope of protection of the present invention is not limited to the following description.
Fig. 1 is a schematic structural diagram of the present invention.
In the figure, 1 reboiler, 2 tower kettle circulating pumps, 3 extraction tower A, 4 kettle extraction pumps, 5 internal circulating pumps, 6 extraction tower B, 7 heat exchangers, 8 reflux tanks and 9 reflux pumps.
Detailed Description
As shown in the figure, the utility model comprises an extraction tower A and an extraction tower B, wherein a feed inlet of the extraction tower A is arranged in the middle of the extraction tower A, a first outlet of a tower kettle of the extraction tower A is connected with a lower inlet of a reboiler through a tower kettle circulating pump, and an upper outlet of the reboiler is connected with a lower circulating return port of the extraction tower A;
a second outlet of the tower A of the extraction tower is connected with an inlet of the desorption tower through a kettle extraction pump;
the tower top gas phase outlet of the extraction tower A is connected with the tower kettle gas phase port at the lower part of the extraction tower B, and the tower kettle outlet of the extraction tower B is connected with the circulating return port at the upper part of the extraction tower A through an internal circulating pump;
the gas phase outlet at the top of the extraction tower B is connected with the inlet of a heat exchanger, the outlet of the heat exchanger is connected with the inlet of a reflux tank, the outlet of the reflux tank is connected with the inlet of a reflux pump, the outlet of the reflux pump is connected with a first connector of a tee joint, a second connector of the tee joint is connected with a reflux port at the upper part of the extraction tower B through a valve, and a third connector of the tee joint is connected with a product tank through a valve;
the upper part of the extraction tower B is provided with an extraction solvent inlet.
The reboiler adopts a fixed tube-plate heat exchanger. The heat exchange medium used may be medium pressure steam.
The extraction tower A and the extraction tower B are both tray extraction towers.
The number of the tower trays of the extraction tower A and the extraction tower B is 78; the isoprene separation efficiency is good.
The feed inlet of the extraction tower A is arranged at the 27 th tray position of the extraction tower A, and the circulating return inlet of the extraction tower A is arranged at the 1 st tray position of the extraction tower A. The position of an extraction solvent inlet of the extraction tower B is arranged at the position of a 9 th tray of the extraction tower B, and the position of a reflux opening of the extraction tower B is arranged at the position of a 1 st tray of the extraction tower B. The port is arranged, so that the extraction effect is good.
The intermediate product in the figure refers to the extraction raw material and can be pumped by a pump.
The tailings extracted by the kettle extraction pump contain alkyne components, and alkyne has economic value and is resolved out through the resolving tower.
DMF solvent can be adopted for extraction, alkyne in isoprene is extracted to a tower kettle for extraction, the overall separation efficiency of isoprene and alkyne is improved, and the effect of removing alkyne from isoprene is good.
The operation of the present invention will be described with reference to the accompanying drawings.
The reboiler is the thermal energy of system, and the heat exchanger gets into the reflux drum after the top of the tower is condensed, returns in the tower through the backwash pump, through extraction tower A gaseous phase and extraction tower B internal circulation pump effect, constructs thermal balance, and the backwash pump is sent isoprene in the reflux drum to the product jar simultaneously, and the cauldron is adopted the pump and is sent the solvent to the analytic tower.
It should be understood that the above detailed description of the present invention is only for illustrating the present invention and is not limited by the technical solutions described in the embodiments of the present invention, and those skilled in the art should understand that the present invention can still be modified or equivalently replaced to achieve the same technical effects; as long as the use requirement is satisfied, the utility model is within the protection scope.
Claims (5)
1. A device for removing alkynes in isoprene production process comprises an extraction tower A and an extraction tower B, and is characterized in that a feed inlet of the extraction tower A is arranged in the middle of the extraction tower A, a first outlet of a tower kettle of the extraction tower A is connected with an inlet at the lower end of a reboiler through a tower kettle circulating pump, and an outlet at the upper end of the reboiler is connected with a circulating return port at the lower part of the extraction tower A;
a second outlet of the tower A of the extraction tower is connected with an inlet of the desorption tower through a kettle extraction pump;
the tower top gas phase outlet of the extraction tower A is connected with the tower kettle gas phase port at the lower part of the extraction tower B, and the tower kettle outlet of the extraction tower B is connected with the circulating return port at the upper part of the extraction tower A through an internal circulating pump;
the gas phase outlet at the top of the extraction tower B is connected with the inlet of a heat exchanger, the outlet of the heat exchanger is connected with the inlet of a reflux tank, the outlet of the reflux tank is connected with the inlet of a reflux pump, the outlet of the reflux pump is connected with a first connector of a tee joint, a second connector of the tee joint is connected with a reflux port at the upper part of the extraction tower B through a valve, and a third connector of the tee joint is connected with a product tank through a valve;
the upper part of the extraction tower B is provided with an extraction solvent inlet.
2. The device for removing alkynes in the isoprene production process according to claim 1, wherein the reboiler adopts a fixed tube-plate heat exchanger.
3. The device for removing alkynes in the isoprene production process according to claim 1, wherein the extraction column a and the extraction column B are tray extraction columns.
4. The device for removing alkynes in the isoprene production process according to claim 3, wherein the number of trays of the extraction column A and the extraction column B is 78 blocks.
5. The device for removing alkynes in the isoprene production process according to claim 4, wherein the feed inlet of the extraction column A is arranged at the 27 th tray position of the extraction column A, and the circulating return outlet of the extraction column A is arranged at the 1 st tray position of the extraction column A; the position of an extraction solvent inlet of the extraction tower B is arranged at the position of a 9 th tray of the extraction tower B, and the position of a reflux opening of the extraction tower B is arranged at the position of a 1 st tray of the extraction tower B.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920790228.3U CN210021247U (en) | 2019-05-29 | 2019-05-29 | Dealkynol device in isoprene production process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920790228.3U CN210021247U (en) | 2019-05-29 | 2019-05-29 | Dealkynol device in isoprene production process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210021247U true CN210021247U (en) | 2020-02-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920790228.3U Active CN210021247U (en) | 2019-05-29 | 2019-05-29 | Dealkynol device in isoprene production process |
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| Country | Link |
|---|---|
| CN (1) | CN210021247U (en) |
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2019
- 2019-05-29 CN CN201920790228.3U patent/CN210021247U/en active Active
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