CN217593864U - Low-temperature heat energy comprehensive utilization device for propane dehydrogenation process - Google Patents
Low-temperature heat energy comprehensive utilization device for propane dehydrogenation process Download PDFInfo
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- CN217593864U CN217593864U CN202221593012.6U CN202221593012U CN217593864U CN 217593864 U CN217593864 U CN 217593864U CN 202221593012 U CN202221593012 U CN 202221593012U CN 217593864 U CN217593864 U CN 217593864U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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Abstract
The utility model discloses a propane dehydrogenation process low-temperature heat energy comprehensive utilization device, which comprises a stabilizing tower, a desorption tower, a hot water heating heat exchanger, a stabilizing tower feeding and discharging heat exchanger, a stabilizing tower feeding pipeline and a desorption tower bottom reboiler; a feed pipeline of the stabilizing tower is connected to the stabilizing tower through a shell pass of a hot water heating heat exchanger and a shell pass of a feed and discharge heat exchanger of the stabilizing tower; the shell pass of the reboiler at the bottom of the desorption tower is connected with a pipeline of the desorption tower; the tower bottom of the stabilizing tower is sequentially connected to a tube pass of a material inlet and outlet heat exchanger of the stabilizing tower and a tube pass of a reboiler at the tower bottom of the desorption tower through a material outlet pipeline of the stabilizing tower; a tower bottom extraction bypass is arranged between the stabilizing tower discharging pipeline and the stabilizing tower charging and discharging heat exchanger tube pass outlet through a stabilizing tower charging temperature control three-way regulating valve; a reboiler bypass is arranged between the discharge pipeline of the stabilizing tower and the tube pass outlet of the reboiler at the bottom of the desorption tower through a temperature control three-way regulating valve of the desorption tower. The utility model discloses heat utilization efficiency is high to be favorable to reducing the production load of later process.
Description
Technical Field
The utility model relates to a propane dehydrogenation production technology, concretely relates to propane dehydrogenation technology heat energy utilization equipment.
Background
The propane dehydrogenation device uses a hot water system as a heat source, a stabilizing tower and a desorption tower of the propane dehydrogenation device both need to consume heat energy, and the extracted product at the bottom of the stabilizing tower carries certain waste heat. In addition, the insufficient heating quantity of the reboiler at the bottom of the desorption tower can cause poor desorption effect, dry gas is carried to the gas fractionation unit, and the production load of the subsequent gas fractionation unit is increased.
Disclosure of Invention
The utility model aims to solve the technical problem that a propane dehydrogenation technology low temperature heat energy comprehensive utilization device is provided, its heat energy utilization efficiency is high to be favorable to reducing back-end technology production load.
In order to solve the technical problem, the low-temperature heat energy comprehensive utilization device for the propane dehydrogenation process comprises a stabilizing tower and a desorption tower, and further comprises a hot water heating heat exchanger, a stabilizing tower feeding and discharging heat exchanger, a stabilizing tower feeding pipeline and a desorption tower bottom reboiler;
the hot water heating heat exchanger tube pass is connected with a hot water source, and the stabilizing tower feeding pipeline is connected to the stabilizing tower through the hot water heating heat exchanger shell pass and the stabilizing tower feeding and discharging heat exchanger shell pass;
the shell pass of a reboiler at the bottom of the desorber is connected with the desorber pipeline;
the tower bottom of the stabilizing tower is sequentially connected to a tube pass of a material inlet and outlet heat exchanger of the stabilizing tower and a tube pass of a reboiler at the tower bottom of the desorption tower through a discharging pipeline of the stabilizing tower; a tower bottom extraction bypass is arranged between the stabilizing tower discharging pipeline and the stabilizing tower charging and discharging heat exchanger tube pass outlet through a stabilizing tower charging temperature control three-way regulating valve; a reboiler bypass is arranged between the discharge pipeline of the stabilizing tower and the tube pass outlet of the reboiler at the bottom of the desorption tower through a temperature control three-way regulating valve of the desorption tower.
The technical effects of the utility model are embodied as follows: A. the waste heat discharged from the bottom of the stabilizing tower is reused, the overall heat utilization efficiency of the device is improved, and the production cost is favorably reduced; B. the tower bottom extraction bypass and the reboiler bypass are arranged, and the flow control can be performed on the direction of the tower bottom discharging, so that the working temperature of the reboiler at the bottom of the desorption tower is kept stable, and the reduction of the production load of the subsequent process is facilitated. C. The device can be automatically controlled, and the production process is safe, stable and reliable.
Drawings
Fig. 1 is a schematic structural diagram of the low-temperature heat energy comprehensive utilization device for the propane dehydrogenation process of the present invention.
Detailed Description
The following describes the embodiments of the present invention with reference to the accompanying drawings.
As can be seen from fig. 1, the propane dehydrogenation process low-temperature heat energy comprehensive utilization device of the utility model comprises a stabilizer tower 1 and a desorber tower 2, and further comprises a hot water heating heat exchanger 3, a stabilizer tower feeding and discharging heat exchanger 4, a stabilizer tower feeding pipeline 5 and a desorber tower bottom reboiler 6;
the hot water heating heat exchanger 3 is connected with a hot water source, and the stabilizing tower feed pipeline 5 is connected to the stabilizing tower 1 through the hot water heating heat exchanger 3 shell pass and the stabilizing tower feed and discharge heat exchanger 4 shell pass;
the shell pass of a reboiler 6 at the bottom of the desorption tower is connected with the desorption tower 2 through a pipeline;
the stabilizing tower 1 is sequentially connected to the tube side of a feed/discharge heat exchanger 4 of the stabilizing tower and the tube side of a reboiler 6 at the bottom of the desorption tower through a stabilizing tower discharge pipeline 7 at the tower bottom; a tower bottom extraction bypass 70 is arranged between the stabilizing tower discharging pipeline 7 and the tube pass outlet of the stabilizing tower charging and discharging heat exchanger 4 through a stabilizing tower charging temperature control three-way regulating valve 700; a reboiler bypass 71 is arranged between the discharge pipeline 7 of the stabilizing tower and the tube pass outlet of the reboiler 6 at the bottom of the desorption tower through a temperature control three-way regulating valve 710 of the desorption tower.
Referring to fig. 1, the utility model discloses during operation, the material passes through stabilizer feed line 5 and gets into stabilizer 1 after hot water heating heat exchanger 3, 4 shell sides of stabilizer business turn over material heat exchanger twice heating, and the operation is accomplished the back and is discharged through stabilizer discharge line 7 in the tower. And the stabilizing tower discharge pipeline 7 is connected to the tube pass of the stabilizing tower feed and discharge heat exchanger 4 and the tube pass of the tower bottom reboiler 6 of the desorption tower, so that the waste heat reuse of tower bottom extract is realized.
The stabilizing tower feeding temperature control three-way regulating valve 700 can control the flow of the tower bottom extraction bypass 70, and further regulate the flow of 4 tube pass materials of the stabilizing tower feeding and discharging heat exchanger. When the feeding temperature of the stabilizer 1 rises and reaches a set range, the control system increases the flow of the bypass 70 at the bottom of the tower through the three-way valve and transfers the redundant heat to the reboiler 6 at the bottom of the desorber.
The temperature control three-way regulating valve 710 of the desorption tower can control the material flow of the reboiler bypass 71, and further control the temperature at the bottom of the desorption tower 2. By increasing the heating quantity of the reboiler 6 at the bottom of the desorption tower, the desorption effect can be improved, dry gas is prevented from being carried to the gas fractionation unit, and the production load of the subsequent process is reduced.
The device reuses the waste heat of the material extracted from the bottom of the stabilizing tower 1, thereby improving the energy utilization efficiency; and the flow of the material in the bypass is adjusted by matching the stabilizing tower feeding temperature control three-way adjusting valve 700 and the desorption tower temperature control three-way adjusting valve 710, so that the flow of the 4 tube pass of the discharging heat exchanger and the 6 tube pass of the reboiler at the bottom of the desorption tower is automatically adjusted and controlled according to the set temperature, and the energy waste is further avoided.
The system also comprises a control system, wherein input signals of the control system are the feeding temperature of the stabilizing tower 1 and the bottom temperature of the desorption tower 2; the output signals are the flow of the hot water heating heat exchanger 3, the flow of the tower bottom extraction bypass 70 and the flow of the reboiler bypass 71.
The control process is as follows: and in the temperature rise stage of the stabilizing tower 1, the flow of the hot water heating heat exchanger 3 is increased, and the flow of the tower bottom extraction bypass 70 is reduced.
When the temperature of the stabilizer 1 reaches a set value, the flow of a tower bottom extraction bypass 70 is increased, and the flow of a reboiler bypass 71 is reduced; when the temperature at the bottom of the desorber 2 reaches a set value, the reboiler bypass 71 flow rate is increased.
When the temperature rises of the stabilizing tower 1 and the desorption tower 2 reach the set values, the flow of the hot water heating heat exchanger 3 is reduced, and the flow of the extraction bypass 70 and the reboiler bypass 71 at the bottom of the tower are adjusted to achieve new balance.
The utility model has the characteristics of structural design is reasonable, convenient to use, saving cost, through utilizing hot water to carry out the primary heating to the stabilizer feeding, stabilize the mode that the extraction bypass shifts the unnecessary hot water heat at the bottom of the tower, improved the performance of enterprises, saved manufacturing cost.
The present invention can be embodied in many different forms without departing from the spirit or essential attributes thereof, and all changes and modifications that fall within the spirit and scope of the invention are intended to be embraced thereby.
Claims (1)
1. The utility model provides a propane dehydrogenation technology low temperature heat energy comprehensive utilization device, includes stabilizer (1), desorber (2), its characterized in that: the system also comprises a hot water heating heat exchanger (3), a stabilizing tower feeding and discharging heat exchanger (4), a stabilizing tower feeding pipeline (5) and a desorption tower bottom reboiler (6);
the tube side of the hot water heating heat exchanger (3) is connected with a hot water source, and the stabilizing tower feeding pipeline (5) is connected to the stabilizing tower (1) through the shell side of the hot water heating heat exchanger (3) and the shell side of the stabilizing tower feeding and discharging heat exchanger (4);
the shell side of the reboiler (6) at the bottom of the desorption tower is connected with the pipeline of the desorption tower (2);
the bottom of the stabilizing tower (1) is sequentially connected to a tube pass of the stabilizing tower charging and discharging heat exchanger (4) and a tube pass of a reboiler (6) at the bottom of the desorption tower through a stabilizing tower discharging pipeline (7); a tower bottom extraction bypass (70) is arranged between the stabilizing tower discharging pipeline (7) and the tube pass outlet of the stabilizing tower charging and discharging heat exchanger (4) through a stabilizing tower charging temperature control three-way regulating valve (700); a reboiler bypass (71) is arranged between the discharge pipeline (7) of the stabilizing tower and the tube pass outlet of the reboiler (6) at the bottom of the desorption tower through a temperature control three-way regulating valve (710) of the desorption tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221593012.6U CN217593864U (en) | 2022-06-24 | 2022-06-24 | Low-temperature heat energy comprehensive utilization device for propane dehydrogenation process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221593012.6U CN217593864U (en) | 2022-06-24 | 2022-06-24 | Low-temperature heat energy comprehensive utilization device for propane dehydrogenation process |
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| Publication Number | Publication Date |
|---|---|
| CN217593864U true CN217593864U (en) | 2022-10-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221593012.6U Active CN217593864U (en) | 2022-06-24 | 2022-06-24 | Low-temperature heat energy comprehensive utilization device for propane dehydrogenation process |
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| Country | Link |
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| CN (1) | CN217593864U (en) |
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2022
- 2022-06-24 CN CN202221593012.6U patent/CN217593864U/en active Active
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