CN220398279U - Vacuum maintaining unit for composite serial steam turbine condenser - Google Patents
Vacuum maintaining unit for composite serial steam turbine condenser Download PDFInfo
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- CN220398279U CN220398279U CN202322087595.6U CN202322087595U CN220398279U CN 220398279 U CN220398279 U CN 220398279U CN 202322087595 U CN202322087595 U CN 202322087595U CN 220398279 U CN220398279 U CN 220398279U
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- vacuum pump
- liquid
- heat exchanger
- communicated
- liquid ring
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- 239000002131 composite material Substances 0.000 title claims abstract description 14
- 239000007788 liquid Substances 0.000 claims abstract description 97
- 238000012423 maintenance Methods 0.000 claims abstract description 21
- 239000000498 cooling water Substances 0.000 claims abstract description 19
- 239000012224 working solution Substances 0.000 claims abstract description 15
- 238000000926 separation method Methods 0.000 claims description 19
- 239000000110 cooling liquid Substances 0.000 claims description 9
- 238000000605 extraction Methods 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 230000007423 decrease Effects 0.000 abstract description 3
- 239000012530 fluid Substances 0.000 description 7
- 238000005086 pumping Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
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- Applications Or Details Of Rotary Compressors (AREA)
Abstract
The utility model relates to the technical field of vacuum maintenance units, in particular to a composite serial-type steam turbine condenser vacuum maintenance unit which comprises a Roots vacuum pump, wherein an air outlet end of the Roots vacuum pump is communicated with a gas phase heat exchanger, an output end of the gas phase heat exchanger is communicated with an air inlet end of a liquid ring vacuum pump, a cooling water supply pipe is communicated with a liquid inlet end of the gas phase heat exchanger, a cooling water drain pipe is communicated with a liquid outlet end of the gas phase heat exchanger, and a working liquid input end of the liquid ring vacuum pump is communicated with a working liquid conveying pipe. Through establishing ties liquid ring vacuum pump and roots vacuum pump, not only can reach higher vacuum, reduced the required energy consumption of during operation simultaneously, make liquid ring vacuum pump need not to keep high power operation always, required working solution volume also corresponding decline after reducing liquid ring vacuum pump power, make liquid ring vacuum pump working solution need not frequent change and maintenance, reduce the running cost and the maintenance degree of difficulty of enterprise.
Description
Technical Field
The utility model relates to the technical field of vacuum maintenance units, in particular to a vacuum maintenance unit for a composite serial-type steam turbine condenser.
Background
Traditional RH refined steel vacuumizing in steel plants, condenser vacuumizing systems in thermal power plants and the like adopt a single-stage plane liquid ring vacuum pump unit or a double-stage cone liquid ring vacuum pump unit, and the liquid ring vacuum pump unit has the main defects of low working condition vacuum degree, high energy consumption, large vibration and large noise, and liquid ring vacuum pump working liquid needs to be replaced and maintained frequently, so that the running cost and maintenance difficulty of enterprises can be increased.
Disclosure of Invention
In order to solve the defects of the prior art, the utility model provides a composite serial-type steam turbine condenser vacuum maintenance unit which comprises a Roots vacuum pump, wherein an air outlet end of the Roots vacuum pump is communicated with a gas phase heat exchanger, an output end of the gas phase heat exchanger is communicated with an air inlet end of a liquid ring vacuum pump, a cooling water supply pipe is communicated with a liquid inlet end of the gas phase heat exchanger, a cooling water drain pipe is communicated with a liquid outlet end of the gas phase heat exchanger, and a working liquid input end of the liquid ring vacuum pump is communicated with a working liquid conveying pipe.
Preferably, the gas outlet end of the liquid ring vacuum pump is communicated with a gas-liquid separation tank, the working liquid conveying pipe is communicated with the gas-liquid separation tank, the liquid outlet of the gas-liquid separation tank is communicated with the input end of the tubular heat exchanger, and the output end of the tubular heat exchanger is communicated with the working liquid input end of the liquid ring vacuum pump.
Preferably, the cooling liquid input end of the tubular heat exchanger is communicated with a cooling water supply pipe, and the cooling liquid output end of the tubular heat exchanger is communicated with a cooling water drain pipe.
Preferably, the device further comprises a main drain pipe, wherein the gas-liquid separation tank is communicated with the main drain pipe, a pipeline for communicating the liquid ring vacuum pump with the gas-liquid separation tank is communicated with the main drain pipe, and the Roots vacuum pump is communicated with the main drain pipe.
Preferably, the Roots vacuum pump and the liquid ring vacuum pump are driven by a driving motor, wherein the driving motor for driving the Roots vacuum pump is a variable frequency motor.
Preferably, a check valve is fixedly arranged on a pipeline of an air extraction end of the Roots vacuum pump.
Preferably, the check valve is a pneumatic butterfly valve.
Preferably, a thermometer and a pressure gauge are fixedly arranged on a pipeline for communicating the tubular heat exchanger with the liquid ring vacuum pump.
The utility model has the following beneficial effects:
through establishing ties liquid ring vacuum pump and roots vacuum pump, not only can reach higher vacuum, reduced the required energy consumption of during operation simultaneously, make liquid ring vacuum pump need not to keep high power operation always, required working solution volume also corresponding decline after reducing liquid ring vacuum pump power, make liquid ring vacuum pump working solution need not frequent change and maintenance, reduce the running cost and the maintenance degree of difficulty of enterprise.
Drawings
Fig. 1 is a schematic view of the overall structure provided by the present utility model.
Fig. 2 is a top view of the overall structure provided by the present utility model.
Fig. 3 is a left side view of the overall structure provided by the present utility model.
In fig. 1-3, the structures represented by the various numbers are listed below:
1. a liquid ring vacuum pump; 2. a gas phase heat exchanger; 3. roots vacuum pump; 4. a gas-liquid separation tank; 5. a tubular heat exchanger; 6. a thermometer; 7. a pressure gauge; 8. a cooling water supply pipe; 9. a cooling water drain pipe; 10. a main drain pipe; 11. a non-return valve; 12. a driving motor; 13. and a working fluid delivery pipe.
Detailed Description
The principles and features of the present utility model are described below with examples only to illustrate the present utility model and not to limit the scope of the present utility model.
It is noted that when an element or component is referred to as being "connected," "positioned," "assembled" to another element or component, it can be directly on the other element or component or intervening elements and components may also be present. The terms "left", "right", "upper", "lower" and the like are used herein for illustrative purposes only.
In a specific embodiment, as shown in fig. 1-3, a vacuum maintenance unit for a composite tandem type steam turbine condenser comprises a Roots vacuum pump 3, wherein an air outlet end of the Roots vacuum pump 3 is communicated with a gas phase heat exchanger 2, an output end of the gas phase heat exchanger 2 is communicated with an air inlet end of a liquid ring vacuum pump 1, a cooling water supply pipe 8 is communicated with a liquid inlet end of the gas phase heat exchanger 2, a cooling water drain pipe 9 is communicated with a liquid outlet end of the gas phase heat exchanger 2, and a working liquid input end of the liquid ring vacuum pump 1 is communicated with a working liquid conveying pipe 13.
In this embodiment, the gas outlet end of the liquid ring vacuum pump 1 is communicated with the gas-liquid separation tank 4, the working liquid conveying pipe 13 is communicated with the gas-liquid separation tank 4, the liquid outlet of the gas-liquid separation tank 4 is communicated with the input end of the tubular heat exchanger 5, and the output end of the tubular heat exchanger 5 is communicated with the working liquid input end of the liquid ring vacuum pump 1. The liquid ring vacuum pump 1 discharges air into the gas-liquid separation tank 4 after extracting, because the air can take away a part of working solution when exhausting, and because the higher temperature of air can heat the working solution, the higher temperature working solution can influence the evacuation efficiency when using, therefore when getting into the gas-liquid separation tank 4, the lost working solution and gas are separated earlier, the lost working solution gets into in the tubular heat exchanger 5 to cool down, then carry to the liquid ring vacuum pump 1 in carry out cyclic utilization again, reduce the loss of working solution.
In this embodiment, the working fluid of the liquid ring vacuum pump 1 is water, and in other embodiments, the working fluid of the liquid ring vacuum pump 1 may be a liquid such as polypropylene, xylene or alcohol, and different working fluids are selected according to different working environments, for example, in some chemical fields, when the pumped gas reacts chemically with water, water should be avoided as the working fluid of the liquid ring vacuum pump 1.
In the present embodiment, the cooling liquid input end of the tubular heat exchanger 5 is communicated with a cooling water supply pipe 8, and the cooling liquid output end of the tubular heat exchanger 5 is communicated with a cooling water drain pipe 9. The cooling liquid flows into the tubular heat exchanger 5 and the gas phase heat exchanger 2 from the cooling water supply pipe 8, the working liquid in the tubular heat exchanger 5 is cooled, the gas in the gas phase heat exchanger 2 is cooled, and finally the cooling liquid flows out from the cooling water drain pipe 9, and the tubular heat exchanger 5 and the gas phase heat exchanger 2 share a cooling water supply and drain system, so that the whole equipment is simpler, and the integration level is higher.
In the present embodiment, the utility model further comprises a main drain pipe 10, the gas-liquid separation tank 4 is communicated with the main drain pipe 10, the pipeline for communicating the liquid ring vacuum pump 1 with the gas-liquid separation tank 4 is communicated with the main drain pipe 10, and the Roots vacuum pump 3 is communicated with the main drain pipe 10. When not in use or when needing to be stopped, the redundant liquid in the unit can be drained, so that the liquid is prevented from being remained in the unit for a long time to cause corrosion damage.
In this embodiment, the Roots vacuum pump 3 and the liquid ring vacuum pump 1 are all driven by the driving motor 12, wherein the driving motor 12 for driving the Roots vacuum pump 3 is a variable frequency motor, and the variable frequency motor can prevent the driving motor 12 from being damaged by overcurrent when being started due to the large pumping capacity of the Roots vacuum pump 3, and the low frequency is used when being started, so that the problem of overcurrent can be effectively avoided by increasing the frequency of the variable frequency motor after pumping to a certain vacuum degree.
In this embodiment, the fixed mounting has check valve 11 on the pumping end pipeline of roots vacuum pump 3, can effectively prevent that the air from flowing backward and causing the vacuum degree to reduce after the unit is shut down, also effectively prevent simultaneously when flowing backward to take out the working solution in the liquid ring vacuum pump 1 to roots vacuum pump 3 and cause roots vacuum pump 3 to damage.
Specifically, the check valve 11 is a pneumatic butterfly valve, and in other embodiments, the check valve 11 may be an electric butterfly valve or the like.
In this embodiment, fixed mounting has thermometer 6 and manometer 7 on the pipeline of tubular heat exchanger 5 and liquid ring vacuum pump 1 intercommunication to the staff conveniently observes the behavior of liquid ring vacuum pump 1, can in time discover when the problem and overhaul, avoids bigger loss.
Working principle: connecting a pipeline at the air extraction end of the Roots vacuum pump 3 with equipment needing vacuumizing, adding an initial certain amount of working fluid into the gas-liquid separation tank 4, cooling the working fluid, entering the liquid ring vacuum pump 1, starting the liquid ring vacuum pump 1, reducing the vacuum degree to be less than 6kpa absolute, starting the Roots vacuum pump 3, gradually increasing the frequency of a driving motor 12 for driving the Roots vacuum pump 3 to rotate, and further increasing the vacuum degree to 0.5 pa-5 pa absolute.
To sum up: through establishing ties liquid ring vacuum pump 1 and roots vacuum pump 3, not only can reach higher vacuum, reduced the required energy consumption of during operation simultaneously, make liquid ring vacuum pump 1 need not to keep high-power operation always, required working solution volume also corresponding decline after reducing liquid ring vacuum pump 1 power, make liquid ring vacuum pump 1 working solution need not frequent change and maintenance, reduce the running cost and the maintenance degree of difficulty of enterprise. When the Roots vacuum pump 3 and the liquid ring vacuum pump 1 synchronously run, the vacuum degree can be reduced to 2 pa-5 pa absolute pressure under normal working conditions, the driving power of the two driving motors 12 is only 11kW, which is smaller than 90-160 kW when the liquid ring vacuum pump 1 singly works, the electricity consumption is saved, the working liquid required after the power reduction is also reduced, and the required cooling liquid is also synchronously reduced, so that the purpose of reducing the energy consumption is achieved.
The above is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way; those skilled in the art can smoothly practice the utility model as shown in the drawings and described above; however, those skilled in the art will appreciate that many modifications, adaptations, and variations of the present utility model are possible in light of the above teachings without departing from the scope of the utility model; meanwhile, any equivalent changes, modifications and evolution of the above embodiments according to the essential technology of the present utility model still fall within the scope of the present utility model.
Claims (8)
1. A composite serial steam turbine condenser vacuum maintenance unit is characterized in that: including roots vacuum pump (3), the end intercommunication of giving vent to anger of roots vacuum pump (3) has gas phase heat exchanger (2), the output of gas phase heat exchanger (2) communicates with the inlet end of liquid ring vacuum pump (1), and cooling water delivery pipe (8) communicate with the inlet end of gas phase heat exchanger (2), and cooling water drain pipe (9) communicate with the outlet end of gas phase heat exchanger (2), and the working solution input of liquid ring vacuum pump (1) communicates with working solution conveyer pipe (13).
2. The composite series-type steam turbine condenser vacuum maintenance unit according to claim 1, wherein: the gas outlet end of the liquid ring vacuum pump (1) is communicated with a gas-liquid separation tank (4), the working liquid conveying pipe (13) is communicated with the gas-liquid separation tank (4), the liquid outlet of the gas-liquid separation tank (4) is communicated with the input end of the tubular heat exchanger (5), and the output end of the tubular heat exchanger (5) is communicated with the working liquid input end of the liquid ring vacuum pump (1).
3. The composite series-type steam turbine condenser vacuum maintenance unit according to claim 2, wherein: the cooling liquid input end of the tubular heat exchanger (5) is communicated with a cooling water supply pipe (8), and the cooling liquid output end of the tubular heat exchanger (5) is communicated with a cooling water drain pipe (9).
4. A composite tandem steam turbine condenser vacuum maintenance unit according to claim 3, wherein: still include total drain pipe (10), gas-liquid separation jar (4) and total drain pipe (10) intercommunication, the pipeline and the total drain pipe (10) intercommunication of liquid ring vacuum pump (1) and gas-liquid separation jar (4) intercommunication, roots vacuum pump (3) and total drain pipe (10) intercommunication.
5. The composite series-type steam turbine condenser vacuum maintenance unit according to claim 1, wherein: the Roots vacuum pump (3) and the liquid ring vacuum pump (1) are driven by a driving motor (12), wherein the driving motor (12) for driving the Roots vacuum pump (3) is a variable frequency motor.
6. The composite series-type steam turbine condenser vacuum maintenance unit according to claim 1, wherein: and a check valve (11) is fixedly arranged on a pipeline of the air extraction end of the Roots vacuum pump (3).
7. The vacuum maintenance unit of a composite tandem steam turbine condenser of claim 6, wherein: the check valve (11) is a pneumatic butterfly valve.
8. The composite series-type steam turbine condenser vacuum maintenance unit according to claim 2, wherein: and a thermometer (6) and a pressure gauge (7) are fixedly arranged on a pipeline, communicated with the liquid ring vacuum pump (1), of the tubular heat exchanger (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322087595.6U CN220398279U (en) | 2023-08-04 | 2023-08-04 | Vacuum maintaining unit for composite serial steam turbine condenser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322087595.6U CN220398279U (en) | 2023-08-04 | 2023-08-04 | Vacuum maintaining unit for composite serial steam turbine condenser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220398279U true CN220398279U (en) | 2024-01-26 |
Family
ID=89610788
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322087595.6U Active CN220398279U (en) | 2023-08-04 | 2023-08-04 | Vacuum maintaining unit for composite serial steam turbine condenser |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220398279U (en) |
-
2023
- 2023-08-04 CN CN202322087595.6U patent/CN220398279U/en active Active
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