CN219941811U - Device for improving feeding temperature of rectification unit - Google Patents
Device for improving feeding temperature of rectification unit Download PDFInfo
- Publication number
- CN219941811U CN219941811U CN202321325479.7U CN202321325479U CN219941811U CN 219941811 U CN219941811 U CN 219941811U CN 202321325479 U CN202321325479 U CN 202321325479U CN 219941811 U CN219941811 U CN 219941811U
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- Prior art keywords
- shell
- pipeline
- valve
- feeding
- rectification unit
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- 238000007599 discharging Methods 0.000 claims abstract description 32
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims abstract description 18
- YNQLUTRBYVCPMQ-UHFFFAOYSA-N Ethylbenzene Chemical compound CCC1=CC=CC=C1 YNQLUTRBYVCPMQ-UHFFFAOYSA-N 0.000 claims abstract description 16
- 238000006356 dehydrogenation reaction Methods 0.000 claims abstract description 15
- 239000007788 liquid Substances 0.000 claims abstract description 15
- 238000011084 recovery Methods 0.000 claims abstract description 8
- 238000012824 chemical production Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
The utility model belongs to the technical field of chemical production, and discloses a device for improving the feeding temperature of a rectification unit, which comprises a shell feeding pipeline (1), a heat exchanger (2), a pipe layer feeding pipeline (3), a pipe layer discharging pipeline (5) and a shell discharging pipeline (6); the top discharge port of the ethylbenzene recovery tower is connected with the shell of the heat exchanger (2) through a shell feeding pipeline (1), and a fifth valve (13) is arranged on the shell feeding pipeline (1); the shell discharging hole of the heat exchanger is provided with a shell discharging pipeline (6), and a seventh valve (14) is arranged on the shell discharging pipeline (6); the dehydrogenation liquid enters the pipe layer of the heat exchanger (2) through the pipe layer feeding pipeline (3). According to the utility model, the heat exchange device is added to exchange heat between the high-temperature discharged material of the ethylbenzene recovery tower and the dehydrogenation liquid in the styrene rectification unit, so that the heat is recovered, the dehydrogenation liquid can be heated, the low-pressure steam consumption of the rectification unit is saved, and the cost is saved.
Description
Technical Field
The utility model belongs to the technical field of chemical production, and particularly relates to a device for improving the feeding temperature of a rectification unit.
Background
When dehydrogenation liquid in the styrene rectification unit directly enters a crude styrene tower for rectification, the feeding temperature is low, and the low feeding temperature can cause the reaction time to be long, so that the production efficiency is affected; in the existing production, the dehydrogenation liquid is heated by low-pressure steam, so that the cost is high; and the temperature of the top discharge of the ethylbenzene recovery tower is 105 ℃, and the direct discharge can cause energy waste.
Disclosure of Invention
The utility model aims to provide a device for improving the feeding temperature of a rectifying unit, which aims to solve the technical problems that the feeding temperature of dehydrogenation liquid of a crude styrene tower is low and the production efficiency is affected due to the fact that the ejection temperature of an ethylbenzene recovery tower is high and energy is wasted due to direct discharge.
In order to achieve the above purpose, the specific technical scheme of the device for improving the feeding temperature of the rectification unit is as follows:
a device for improving the feeding temperature of a rectification unit comprises a shell feeding pipeline 1, a heat exchanger 2, a tube layer feeding pipeline 3, a tube layer discharging pipeline 5 and a shell discharging pipeline 6; the top discharge port of the ethylbenzene recovery tower is connected with the shell of the heat exchanger 2 through a shell feeding pipeline 1, and a fifth valve 13 is arranged on the shell feeding pipeline 1; the shell discharging hole of the heat exchanger is provided with a shell discharging pipeline 6, and a seventh valve 14 is arranged on the shell discharging pipeline 6; the dehydrogenation liquid enters the pipe layer of the heat exchanger 2 through a pipe layer feeding pipeline 3, and a first valve 9 is arranged on the pipe layer feeding pipeline 3; a tube layer discharge pipeline 5 is arranged at a tube layer discharge port of the heat exchanger, and a third valve 11 and a second valve 10 are arranged on the tube layer discharge pipeline 5; the pipe layer discharging pipeline 5 is connected with a dehydrogenation liquid inlet of the crude styrene tower.
Further, a shell bypass 8 is arranged between the shell feeding pipeline 1 and the shell discharging pipeline 6, and an eighth valve 15 and a temperature control valve 7 which are connected in parallel are arranged on the shell bypass 8.
Further, a pipe layer bypass 4 is arranged between the pipe layer feeding pipeline 3 and the pipe layer discharging pipeline 5, and a fourth valve 12 is arranged on the pipe layer bypass 4.
Further, a temperature sensor 16 is arranged on the pipe layer discharging pipeline, and the temperature sensor is connected with the temperature control valve 7.
Further, the second valve 10 is a blow valve.
The device for improving the feeding temperature of the rectification unit has the following advantages: by adding the heat exchange device, the high-temperature discharged material of the ethylbenzene recovery tower exchanges heat with the dehydrogenation liquid in the styrene rectification unit, so that the heat is recovered, the dehydrogenation liquid can be heated, the low-pressure steam consumption of the rectification unit is reduced, and the cost is saved.
Drawings
FIG. 1 is a schematic diagram of the structure of the device for increasing the feeding temperature of the rectification unit.
Detailed Description
For a better understanding of the objects, structure and function of the present utility model, a device for increasing the feed temperature of a rectification unit according to the present utility model will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1, the device for improving the feeding temperature of the rectification unit comprises a shell feeding pipeline 1, a heat exchanger 2, a tube layer feeding pipeline 3, a tube layer discharging pipeline 5 and a shell discharging pipeline 6.
The top discharge port of the ethylbenzene recovery tower is connected with the shell of the heat exchanger 2 through a shell feeding pipeline 1, and a fifth valve 13 is arranged on the pipeline; the shell discharging hole of the heat exchanger is provided with a shell discharging pipeline 6, and a seventh valve 14 is arranged on the shell discharging pipeline 6; a shell bypass 8 is arranged between the shell feeding pipeline 1 and the shell discharging pipeline 6, and an eighth valve 15 and a temperature control valve 7 which are connected in parallel are arranged on the shell bypass 8; the dehydrogenation liquid enters the pipe layer of the heat exchanger 2 through a pipe layer feeding pipeline 3, and a first valve 9 is arranged on the pipe layer feeding pipeline 3; the pipe layer discharge port of the heat exchanger is provided with a pipe layer discharge pipeline 5, the pipe layer discharge pipeline 5 is provided with a third valve 11 and a second valve 10, and the pipe layer discharge pipeline 5 is connected with a dehydrogenation liquid inlet of the crude styrene tower; a pipe layer bypass 4 is arranged between the pipe layer feeding pipeline 3 and the pipe layer discharging pipeline 5, and a fourth valve 12 is arranged on the pipe layer bypass 4.
The second valve 10 is a blow-off valve; a temperature sensor 16 is arranged on the discharge pipeline of the pipe layer and is connected with a temperature control valve 7.
When in use, the utility model is characterized in that: confirming the opening state of the fourth valve 12, slightly opening the first valve 9, slightly opening the second valve 10, confirming that the heat exchange device is full of medium, closing the second valve 10, slowly opening the third valve 11, and slowly closing the fourth valve 12 by opening the first valve 9. And (5) finishing the application of the cold medium. Confirming that the eighth valve 15 is in an open state, opening the fifth valve 13, then opening the seventh valve 14, fully opening the front and rear stop valves of the temperature control valve, closing the eighth valve 15, and completing the application of the heat medium.
According to the embodiment, the feeding temperature of the dehydrogenation liquid is adjusted by controlling the opening of the valve of the temperature control valve, so that energy is recovered, and the use of low-pressure steam of the crude styrene tower is saved.
Although embodiments of the present utility model have been described in conjunction with the accompanying drawings, it will be apparent to those skilled in the art that several variations and modifications may be made without departing from the principles of the utility model, which are also considered to be within the scope of the utility model.
Claims (5)
1. The device for improving the feeding temperature of the rectification unit is characterized by comprising a shell feeding pipeline (1), a heat exchanger (2), a tube layer feeding pipeline (3), a tube layer discharging pipeline (5) and a shell discharging pipeline (6);
the top discharge port of the ethylbenzene recovery tower is connected with the shell of the heat exchanger (2) through a shell feeding pipeline (1), and a fifth valve (13) is arranged on the shell feeding pipeline (1);
the shell discharging hole of the heat exchanger is provided with a shell discharging pipeline (6), and a seventh valve (14) is arranged on the shell discharging pipeline (6); the dehydrogenation liquid enters the pipe layer of the heat exchanger (2) through a pipe layer feeding pipeline (3), and a first valve (9) is arranged on the pipe layer feeding pipeline (3); a tube layer discharging pipeline (5) is arranged at the tube layer discharging hole of the heat exchanger, and a third valve (11) and a second valve (10) are arranged on the tube layer discharging pipeline (5); the pipe layer discharging pipeline (5) is connected with a dehydrogenation liquid inlet of the crude styrene tower.
2. The device for improving the feeding temperature of the rectification unit according to claim 1, wherein a shell bypass (8) is arranged between the shell feeding pipeline (1) and the shell discharging pipeline (6), and an eighth valve (15) and a temperature control valve (7) which are connected in parallel are arranged on the shell bypass (8).
3. The device for increasing the feeding temperature of the rectification unit according to claim 2, characterized in that a tube layer bypass (4) is arranged between the tube layer feeding pipeline (3) and the tube layer discharging pipeline (5), and a fourth valve (12) is arranged on the tube layer bypass (4).
4. A device for increasing the feed temperature of a rectification unit according to claim 3, characterized in that a temperature sensor (16) is arranged on the discharge line of the pipe layer, which is connected to a temperature control valve (7).
5. The device for increasing the feed temperature of a rectification unit according to claim 4, characterized in that said second valve (10) is an emptying valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321325479.7U CN219941811U (en) | 2023-05-29 | 2023-05-29 | Device for improving feeding temperature of rectification unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321325479.7U CN219941811U (en) | 2023-05-29 | 2023-05-29 | Device for improving feeding temperature of rectification unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219941811U true CN219941811U (en) | 2023-11-03 |
Family
ID=88541065
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321325479.7U Active CN219941811U (en) | 2023-05-29 | 2023-05-29 | Device for improving feeding temperature of rectification unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219941811U (en) |
-
2023
- 2023-05-29 CN CN202321325479.7U patent/CN219941811U/en active Active
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