CN220398279U - Vacuum maintaining unit for composite serial steam turbine condenser - Google Patents

Vacuum maintaining unit for composite serial steam turbine condenser Download PDF

Info

Publication number
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
Authority
CN
China
Prior art keywords
vacuum pump
liquid
heat exchanger
communicated
liquid ring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202322087595.6U
Other languages
Chinese (zh)
Inventor
王达斌
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huaneng Hainan Power Generation Ltd By Share Ltd Nanshan Power Plant
Original Assignee
Huaneng Hainan Power Generation Ltd By Share Ltd Nanshan Power Plant
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huaneng Hainan Power Generation Ltd By Share Ltd Nanshan Power Plant filed Critical Huaneng Hainan Power Generation Ltd By Share Ltd Nanshan Power Plant
Priority to CN202322087595.6U priority Critical patent/CN220398279U/en
Application granted granted Critical
Publication of CN220398279U publication Critical patent/CN220398279U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Landscapes

  • 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

Vacuum maintaining unit for composite serial steam turbine condenser
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).
CN202322087595.6U 2023-08-04 2023-08-04 Vacuum maintaining unit for composite serial steam turbine condenser Active CN220398279U (en)

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)

Similar Documents

Publication Publication Date Title
CN204806915U (en) Improve generating set condenser vacuum degree's vacuum pumping system
CN220398279U (en) Vacuum maintaining unit for composite serial steam turbine condenser
CN207064349U (en) A kind of hydraulic pump station
CN205860805U (en) A kind of thermal power plant pumped vacuum systems and pump group
CN209800272U (en) Backflow adjusting device suitable for liquid ring pump of thermal power plant
CN210505640U (en) Low-temperature multi-effect seawater desalination and vacuum pumping device
CN216342800U (en) Deep cooling device for working fluid of vacuum pump
CN209800268U (en) Roots water ring vacuum pump unit
CN206917855U (en) Vapor screw compressor unit
CN105257540A (en) Double-pole high-pressure dry type roots vacuum pump unit
CN202032911U (en) Evacuation system for steam condenser
CN214617226U (en) System for preventing centrifugal pump cavitation
CN211820216U (en) Independent cooling circulation system of hydraulic press
CN209326399U (en) Condense island system
CN204319802U (en) Subtract top pumped vacuum systems
CN218509724U (en) Water ring vacuum pump work water cooling device
CN221071427U (en) Novel energy-saving vacuum system
CN214747332U (en) Power plant condenser maintaining vacuum unit adopting oil screw pump
CN218293813U (en) Energy-saving vacuum-pumping system
CN220250718U (en) Energy-saving vacuum lifting unit with multiple back pressure condensers
CN205207178U (en) Bipolar high -pressure dry -type roots vacuum pump unit
CN216245628U (en) Vacuum pumping system with combined application of steam ejector and water ring vacuum pump
CN213932107U (en) Vacuumizing unit
CN216409828U (en) Efficient energy-saving device for maintaining vacuum of condenser
CN218937078U (en) System for maintaining negative pressure operation of condenser of power plant

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant