CN210278312U - Waste heat recycling system of heat medium vacuum system - Google Patents
Waste heat recycling system of heat medium vacuum system Download PDFInfo
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- CN210278312U CN210278312U CN201920936947.1U CN201920936947U CN210278312U CN 210278312 U CN210278312 U CN 210278312U CN 201920936947 U CN201920936947 U CN 201920936947U CN 210278312 U CN210278312 U CN 210278312U
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- heat medium
- pipeline
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- tail gas
- buffer tank
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Abstract
The utility model discloses a heat medium vacuum system waste heat recovery utilizes system, including heat medium unloading buffer tank, air condenser and heat medium condensate holding vessel, still include the oil water evaporimeter, the external high heat extraction media blow-down pipe of heat medium unloading buffer tank entry, the vapor phase export of heat medium unloading buffer tank is connected with the oil inlet of oil water evaporimeter and air condenser's inlet respectively through first pipeline and second pipeline, is equipped with first ooff valve and second ooff valve on first pipeline and the second pipeline respectively. The waste heat recycling system of the heat medium vacuum system can enable the heat medium vacuum system to stably operate, recycle a large amount of waste heat of heat medium steam, and reduce the operation power consumption of an air cooler.
Description
The technical field is as follows:
the utility model relates to a polyester production field specifically says to a heat medium vacuum system waste heat recovery utilizes system.
Background art:
the use state of a heat medium system of the existing polyester production process (three-kettle process) of the Cortis DuPont is low-pressure high-temperature gas, the discharged heat medium Steam (SXB) at the tail end of each user is connected to a vacuum system, and the discharged heat medium steam is cooled, condensed and recycled by utilizing an air condenser 2 driven by a motor. The system is shown in fig. 2, two air condensers are provided, one air condenser is in a working state, the other air condenser is used for standby, under a normal working condition, the motor of one air condenser 2 always runs under a high load, power consumption is large, a large amount of waste heat of heating medium steam is not recovered, and production cost is increased.
The utility model has the following contents:
the utility model aims to solve the technical problem that a heat medium vacuum system waste heat recovery utilizes system is provided, should preheat the recycle system and can make heat medium vacuum system steady operation, retrieves a large amount of waste heat of heat medium steam, reduces air cooler operation power consumption simultaneously.
The utility model provides a waste heat recycling system of a heat medium vacuum system, which comprises a heat medium emptying buffer tank, an air condenser, a heat medium condensate collecting tank and an oil-water evaporator, wherein the heat medium emptying buffer tank is externally connected with a high heat extraction medium emptying pipe at the inlet, the vapor outlet of the heat medium emptying buffer tank is respectively connected with the oil inlet of the oil-water evaporator and the liquid inlet of the air condenser through a first pipeline and a second pipeline, the first pipeline and the second pipeline are respectively provided with a first switch valve and a second switch valve, the liquid outlet of the oil-water evaporator and the liquid outlet of the air condenser are respectively connected with the heat medium condensate collecting tank through pipelines, the vapor outlet of the oil-water evaporator and the vapor outlet of the air condenser are respectively connected with a first tail gas discharge pipe and a second tail gas discharge pipe, the first tail gas discharge pipe and the second tail gas discharge pipe are respectively provided with a third switch valve and a fourth switch valve, the tail gas discharge pipe is connected with the tail disc discharge main pipe, a secondary jet pump is arranged on the tail gas discharge main pipe, the tail gas discharge main pipe is externally connected with a tail gas treatment system, a water inlet of the oil-water evaporator is connected with a desalted water conveying pipeline, and a steam outlet of the oil-water evaporator is externally connected with a steam inlet of a system user through a steam pipeline.
Compared with the prior art after the structure more than adopting, the utility model has the advantages of it is following: by adding the oil-water evaporator, the electric load of the air cooler is reduced, a large amount of waste heat is recovered, and the purpose of stabilizing a heat medium vacuum system can be achieved.
Description of the drawings:
fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic view showing the structure of a heat medium vacuum system of the prior art.
The specific implementation mode is as follows:
the invention will be further explained with reference to the drawings and the detailed description below:
as shown in fig. 1, a waste heat recycling system of a heat medium vacuum system comprises a heat medium emptying buffer tank 1, an air condenser 2, a heat medium condensate collecting tank 3 and an oil water evaporator 4, wherein an inlet of the heat medium emptying buffer tank 1 is externally connected with a high heat discharging medium emptying pipe connected with a process tower, vapor phase heat mediums are conveyed to the heat medium emptying buffer tank, a vapor phase outlet of the heat medium emptying buffer tank 1 is respectively connected with an oil inlet of the oil water evaporator 4 and a liquid inlet of the air condenser 2 through a first pipeline 11 and a second pipeline 12, the first pipeline 11 and the second pipeline 12 are respectively provided with a first switch valve 21 and a second switch valve 22, a liquid outlet of the oil water evaporator 4 and a liquid outlet of the air condenser 2 are respectively connected with the heat medium condensate collecting tank 3 through pipelines, the heat medium condensate collecting tank 3 is used for recovering heat medium condensate, a liquid phase outlet of the heat medium emptying buffer tank 1 is connected with the heat medium condensate collecting tank 3 through a pipeline, a vapor phase outlet of the oil water evaporator 4 and a vapor phase outlet of the air condenser 2 are respectively connected with a first tail gas discharge pipe 31 and a second tail gas discharge pipe 32, the first tail gas discharge pipe 31 and the second tail gas discharge pipe 32 are respectively provided with a third switch valve 23 and a fourth switch valve 24, the first tail gas discharge pipe 31 and the second tail gas discharge pipe 32 are connected with a tail disc discharge main pipe 33, a secondary jet pump is arranged on the tail gas discharge main pipe 33, the tail gas discharge main pipe 33 is externally connected with a tail gas treatment system, the tail gas treatment system is a vacuum tail gas treatment system, a water inlet of the oil water evaporator 4 is connected with a desalted water conveying pipeline, desalted water is conveyed through the desalted water conveying pipeline, for convenient operation, an adjusting valve is arranged on the desalted water conveying pipeline, the other end of the desalted water conveying pipeline is connected with a conveying groove, a conveying, the steam outlet of the oil-water evaporator 4 is externally connected with the steam inlet of a system user through a steam pipeline, and the system user is mainly a heat tracing system of each device in the polyester production system. It should be noted that, this system is through reforming transform, and the oil water evaporimeter directly replaces this spare air cooler from spare air cooler position, need not to provide extra installation space, and one of them air cooler is replaced to the oil water evaporimeter, absorbs heat medium steam waste heat, produces vapor and supplies other users to use, reduces online air cooler power consumption simultaneously.
When the oil-water evaporator is put into use, the third switch is slowly opened, the third switch valve is fully opened after the pressure is stable, the first switch valve is slowly opened to introduce the heat medium steam into the oil-water evaporator, the first switch valve is slowly opened according to the situation after the temperature of the heat medium condensate is stable, the second switch valve is closed, the load of the oil-water evaporator is adjusted to a proper amount, water steam is generated for use, the motor frequency of the air condenser is correspondingly reduced at the moment, the system is finally balanced, and the purposes of heat recycling and power consumption reduction are achieved.
The foregoing is illustrative of the preferred embodiments of the present invention only, and is not to be construed as limiting the claims. All the equivalent structures or equivalent flow changes made by using the contents of the specification and the attached drawings of the utility model are included in the patent protection scope of the utility model.
Claims (1)
1. The utility model provides a heat medium vacuum system waste heat recovery utilizes system, includes heat medium emptying buffer tank, air condenser and heat medium condensate holding tank, its characterized in that: the oil-water evaporator also comprises an oil-water evaporator, an inlet of a heating medium emptying buffer tank is externally connected with a high heat extraction medium emptying pipe, a vapor phase outlet of the heating medium emptying buffer tank is respectively connected with an oil inlet of the oil-water evaporator and a liquid inlet of an air condenser through a first pipeline and a second pipeline, the first pipeline and the second pipeline are respectively provided with a first switch valve and a second switch valve, a liquid phase outlet of the heating medium emptying buffer tank is connected with a heating medium condensate collecting tank through a pipeline, a liquid outlet of the oil-water evaporator and a liquid outlet of the air condenser are connected with the heating medium condensate collecting tank through pipelines, the vapor phase outlet of the oil-water evaporator and the vapor phase outlet of the air condenser are respectively connected with a first tail gas discharge pipe and a second tail gas discharge pipe, the first tail gas discharge pipe and the second tail gas discharge pipe are respectively provided with a third switch valve and a fourth switch valve, and the first tail gas discharge pipe and the second tail gas, the tail gas discharging main pipe is provided with a secondary jet pump and is externally connected with a tail gas treatment system, a water inlet of the oil-water evaporator is connected with a desalted water conveying pipeline, and a steam outlet of the oil-water evaporator is externally connected with a steam inlet of a system user through a steam pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920936947.1U CN210278312U (en) | 2019-06-21 | 2019-06-21 | Waste heat recycling system of heat medium vacuum system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920936947.1U CN210278312U (en) | 2019-06-21 | 2019-06-21 | Waste heat recycling system of heat medium vacuum system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210278312U true CN210278312U (en) | 2020-04-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920936947.1U Active CN210278312U (en) | 2019-06-21 | 2019-06-21 | Waste heat recycling system of heat medium vacuum system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210278312U (en) |
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2019
- 2019-06-21 CN CN201920936947.1U patent/CN210278312U/en active Active
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