CN206073051U - A kind of thermal power plant's electrically driven feed pump system - Google Patents
A kind of thermal power plant's electrically driven feed pump system Download PDFInfo
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- CN206073051U CN206073051U CN201621094974.1U CN201621094974U CN206073051U CN 206073051 U CN206073051 U CN 206073051U CN 201621094974 U CN201621094974 U CN 201621094974U CN 206073051 U CN206073051 U CN 206073051U
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- 239000010687 lubricating oil Substances 0.000 claims abstract description 111
- 239000000779 smoke Substances 0.000 claims abstract description 71
- 239000004519 grease Substances 0.000 claims abstract description 68
- 239000003921 oil Substances 0.000 claims abstract description 68
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 37
- 238000004064 recycling Methods 0.000 claims abstract description 15
- 230000001105 regulatory effect Effects 0.000 claims abstract description 11
- 230000001050 lubricating effect Effects 0.000 claims abstract description 10
- 230000008859 change Effects 0.000 claims abstract description 7
- 239000000498 cooling water Substances 0.000 claims description 15
- 230000005611 electricity Effects 0.000 claims description 11
- 239000002826 coolant Substances 0.000 claims description 10
- 238000005461 lubrication Methods 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 4
- 239000000446 fuel Substances 0.000 claims description 4
- 238000012790 confirmation Methods 0.000 claims description 3
- 235000019198 oils Nutrition 0.000 claims 13
- 238000000034 method Methods 0.000 description 12
- 230000003134 recirculating effect Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 239000012535 impurity Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 235000019504 cigarettes Nutrition 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
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Abstract
This utility model provides a kind of thermal power plant's electrically driven feed pump system, and the system includes：Electric pump water supply system and electric pump lubricating system；Wherein, electric pump water supply system includes：Oxygen-eliminating device, electric pump, electric pump inlet screen, electric pump entrance electrically operated gate, electric pump outlet non-return door, electric pump outlet electrically operated gate, electric pump aerofluxuss electrically operated gate, electric pump recirculation regulating valve and electric pump motorized recycling valve；Electric pump includes electric pump fore pump, electric pump motor, electric pump main pump and electric pump main pump change speed gear box, and electric pump motor is used to drive electric pump fore pump and the work of electric pump main pump；Electric pump inlet screen includes electric pump fore pump inlet screen and electric pump main pump inlet filter screen；Electric pump lubricating system includes：Electric pump grease-box, the first electric pump grease pump, the second electric pump grease pump, electric pump lubricating oil heater, the first smoke exhaust fan, the second smoke exhaust fan, the first electric pump lubricating oil supply oil screen, the first electric pump lube oil cooler and the second electric pump lube oil cooler for oil screen, the second electric pump lubricating oil.
Description
Technical field
This utility model is water-supply technology electronic with regard to thermal power plant, especially with regard to a kind of thermal power plant's electrically driven feed pump system
System.
Background technology
The major function of thermal power plant's electrically driven feed pump system is to provide to start feedwater to boiler, but in existing thermal power plant
Electrically driven feed pump system under full cut-off state, it is impossible to realize the automatic of electrically driven feed pump system；Also cannot give electronic
Under water pump system running status, being automatically stopped for electrically driven feed pump system is realized；Also, work as electrically driven feed pump startup procedure
When carrying out to a certain step, if the step sequence condition is unsatisfactory for, it is impossible to proceed startup program.Also, the existing electricity of thermal power plant
Dynamic feed-water pump cannot effectively radiate and cannot lubricate in time, it is impossible to prevent the electric pump locking accident that impurity causes, and existing
Some thermal power plant's electrically driven feed pump systems cannot prevent electric pump from cavitation occurring.
Utility model content
To solve above-mentioned technical problem, this utility model embodiment provides a kind of thermal power plant's electrically driven feed pump system, institute
Stating thermal power plant's electrically driven feed pump system includes：Electric pump water supply system and electric pump lubricating system；Wherein,
The electric pump water supply system includes：Oxygen-eliminating device, electric pump, electric pump inlet screen, electric pump entrance electrically operated gate, electric pump outlet
Non-return flap, electric pump outlet electrically operated gate, electric pump aerofluxuss electrically operated gate, electric pump recirculation regulating valve and electric pump motorized recycling valve；Wherein,
The electric pump includes electric pump fore pump, electric pump motor, electric pump main pump and electric pump main pump change speed gear box, and the electric pump motor is used to drive
Electric pump fore pump and the work of electric pump main pump；The electric pump inlet screen includes electric pump fore pump inlet screen and electric pump main pump inlet
Filter screen；
The oxygen-eliminating device for supplying water to power plant boiler, the electric pump entrance electrically operated gate, electric pump fore pump inlet screen,
Electric pump fore pump, electric pump main pump inlet filter screen, electric pump main pump, electric pump outlet non-return door, electric pump outlet electrically operated gate are successively set on
The lower part outlet of the oxygen-eliminating device is to the pipeline between power plant boiler；The electric pump motorized recycling valve, electric pump recirculation
Regulating valve is successively set on the electric pump outlet non-return door to the pipeline between the oxygen-eliminating device upper entrance；In the electric pump
Motor is respectively arranged at two ends with cooling water inlet electrically operated gate and coolant outlet electrically operated gate, for providing cold to the electric pump motor
But water；The electric pump aerofluxuss electrically operated gate is arranged on the pump housing of the electric pump；
The electric pump lubricating system includes：Electric pump grease-box, the first electric pump grease pump, the second electric pump grease pump,
Electric pump lubricating oil heater, the first smoke exhaust fan, the second smoke exhaust fan, the first electric pump lubricating oil moisten for oil screen, the second electric pump
Lubricating oil supplies oil screen, the first electric pump lube oil cooler and the second electric pump lube oil cooler；
The electric pump grease-box is used for the oil sources for providing lubricating oil used by electric pump bearing, the first electric pump lubricating oil
Pump, the second electric pump grease pump and electric pump lubricating oil heater are arranged in the electric pump grease-box；The first electric pump profit
Oil pump, the second electric pump grease pump are connected in parallel, in the first electric pump grease pump, the outlet of the second electric pump grease pump
Place is respectively equipped with outlet non-return door；The first electric pump lubricating oil is set gradually for oil screen, the first electric pump lube oil cooler
On pipeline between the oil return inlet that electric pump grease pump exports main pipe to electric pump grease-box；The second electric pump lubricating oil
Be connected in parallel for oil screen with the first electric pump lubricating oil for oil screen, oil screen and the are supplied in the first electric pump lubricating oil
Two electric pump lubricating oil for oil screen be respectively arranged at two ends with entrance electrically operated gate and outlet electrically operated gate；Second electric pump lubricates oil cooling
But device is connected in parallel with the first electric pump lube oil cooler, in the first electric pump lube oil cooler and the second electric pump lubricating oil
Cooler be respectively arranged at two ends with entrance electrically operated gate and outlet electrically operated gate；First smoke exhaust fan, the second smoke evacuation fan parallel-connection
Be arranged on the pipeline between the upper outlet and air vent of the electric pump grease-box, first smoke exhaust fan, second
Smoke exhaust fan is respectively arranged at two ends with entrance electrically operated gate and outlet non-return door.
In one embodiment, to sequentially pass through the electric pump entrance electrically operated gate, electric pump all the way preposition for the water in the oxygen-eliminating device
The outlet of pump intake filter screen, electric pump fore pump, electric pump main pump inlet filter screen, electric pump main pump, electric pump outlet non-return door and electric pump is electronic
Door enters power plant boiler, and it is preposition that another road sequentially passes through the electric pump entrance electrically operated gate, electric pump fore pump inlet screen, electric pump
Pump, electric pump main pump inlet filter screen, electric pump main pump, electric pump outlet non-return door, electric pump motorized recycling valve return the oxygen-eliminating device.
In one embodiment, in the electric pump grease-box lubricating oil Jing the first electric pump grease pumps and/or second is electric
Oil screen and/or the second electric pump lubricating oil is supplied to supply oil screen mistake by the first electric pump lubricating oil after pump lubrication oil pump adherence pressure
Filter, the lubricating oil after filtration is again by supply after the first electric pump lube oil cooler and/or the cooling of the second electric pump lube oil cooler
The bearing of the electric pump is cooled down and is lubricated, and finally returns back to the electric pump grease-box.
In one embodiment, first smoke exhaust fan and/or the second smoke exhaust fan are used to lubricate first electric pump
The oil smoke that oil pump and/or the second electric pump grease pump are produced is extracted out.
In one embodiment, thermal power plant's electrically driven feed pump system also includes：The control of electrically driven feed pump system program is patrolled
Collect operation button, electric pump grease pump block push button, smoke exhaust fan block push button and manual confirmation electric pump air-discharging completing button.
The beneficial effect of this utility model embodiment is：Thermal power plant's electrically driven feed pump that this utility model embodiment is provided
System and its on off control method can realize electrically driven feed pump system under thermal power plant's electrically driven feed pump system full cut-off state
Automatic；Under thermal power plant's electrically driven feed pump system running state, being automatically stopped for electrically driven feed pump system is realized；And and
Gu Renwei judges, it is possible to achieve the leapfrog operation of thermal power plant's electrically driven feed pump system program control logic, works as programed logic
When the service condition of a certain step causes step sequence carry out to meet, artificially Rule of judgment whether can ignore and operate
Leapfrog action, continues the operation of programed logic and finishes until starting.Also, this utility model is utilized, thermal power plant's electricity can be made
Water pump in dynamic feed-water pump is effectively radiated, and because because being provided with grease-box and lubrication in this utility model
Oil pump, it is ensured that electrically driven feed pump can be lubricated in time；Filter screen therein effectively prevents impurity from entering electric pump, prevents electric pump
Locking；Also, the conducting of recirculating line can ensure that the continuous operating flux of the minimum of electric pump, prevent electric pump from cavitation erosion occurring existing
As.
Description of the drawings
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, below will be to embodiment
Or accompanying drawing to be used is briefly described needed for description of the prior art, it should be apparent that, drawings in the following description are only
It is some embodiments of the present utility model, for those of ordinary skill in the art, in the premise for not paying creative work
Under, can be with according to these other accompanying drawings of accompanying drawings acquisition.
Structural representations of the Fig. 1 for this utility model embodiment thermal power plant electrically driven feed pump system；
Schematic flow sheets of the Fig. 2 for the on off control method of this utility model embodiment thermal power plant electrically driven feed pump system；
Schematic flow sheets of the Fig. 3 for the on off control method of this utility model embodiment thermal power plant electrically driven feed pump system.
Drawing reference numeral
1. the first electric pump lubricating oil exports electrically operated gate for oil screen for 2. first electric pump lubricating oil of oil screen entrance electrically operated gate
3. the second electric pump lubricating oil exports electrically operated gate for oil screen for 4. second electric pump lubricating oil of oil screen entrance electrically operated gate
5. 6. first electric pump lube oil cooler of the first electric pump lube oil cooler A entrances electrically operated gate exports electrically operated gate
7. 8. second electric pump lube oil cooler of the second electric pump lube oil cooler B entrances electrically operated gate exports electrically operated gate
9. electric pump exports 10. electric pump motorized recycling valve of electrically operated gate
11. electric pump recirculation regulating valve, 12. electric pump steam discharge electrically operated gate
13. electric pump motor cooling water inlet electrically operated gate, 14. electric pump motor coolant outlet electrically operated gate
15. second electric pump lubricating oil smoke exhaust fan entrance electrically operated gate, 16. first electric pump lubricating oil smoke exhaust fan entrance is electronic
Door
17. first electric pump lubricating oil smoke exhaust fan outlet non-return door, 18. second electric pump lubricating oil smoke exhaust fan outlet non-return
Door
19. second electric pump grease pump outlet non-return door, 20. first electric pump grease pump outlet non-return door
21. second electric pump grease pump, 22. first electric pump grease pump
23. electric pump fore pump, 24. electric pump main pump
25. first electric pump lubricating oil smoke exhaust fan, 26. second electric pump lubricating oil smoke exhaust fan
27. first electric pump lubricating oil supply oil screen for 28. second electric pump lubricating oil of oil screen
29. first electric pump lube oil cooler, 30. second electric pump lube oil cooler
31. electric pump entrance electrically operated gate, 32. electric pump fore pump inlet screen
33. electric pump main pump inlet filter screen, 34. electric pump outlet non-return door
35. electric pump motor, 36. electric pump main pump change speed gear box
37. electric pump grease-box electric heater, 38. oxygen-eliminating device
39. electric pump, 40. electric pump grease-box
Specific embodiment
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only this utility model a part of embodiment, rather than whole
Embodiment.Based on the embodiment in this utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment for being obtained, belongs to the scope of this utility model protection.
As shown in figure 1, this utility model embodiment provide a kind of thermal power plant's electrically driven feed pump system, the system mainly by
Electric pump water supply system and electric pump lubricating system composition.
Wherein, electric pump water supply system includes：Oxygen-eliminating device 38, electric pump 39, electric pump inlet screen (include the preposition pump intake of electric pump
Filter screen 32 and electric pump main pump inlet filter screen 33), electric pump entrance electrically operated gate 31, electric pump outlet non-return door 34, electric pump outlet electrically operated gate
9th, electric pump aerofluxuss electrically operated gate 12, electric pump recirculation regulating valve 11 and electric pump motorized recycling valve 10.Wherein, electric pump 39 includes electric pump
Fore pump 23, electric pump motor 35, electric pump main pump 24 and electric pump main pump change speed gear box 36, electric pump motor 35 are used to drive electric pump fore pump
23 and electric pump main pump 24 work, electric pump main pump change speed gear box 36 is arranged between electric pump main pump 24 and electric pump motor 35.
Oxygen-eliminating device 38 for supplying water to power plant boiler, electric pump entrance electrically operated gate 31, electric pump fore pump inlet screen 32, electricity
Pump fore pump 23, electric pump main pump inlet filter screen 33, electric pump main pump 24, electric pump outlet non-return door 34, electric pump outlet electrically operated gate 9 are successively
The lower part outlet of oxygen-eliminating device 9 is arranged on to the pipeline between power plant boiler.Electric pump motorized recycling valve 10, electric pump recirculation
Regulating valve 11 is successively set on the pipeline being exported between 9 upper entrance of oxygen-eliminating device of electric pump outlet non-return door 34.In electric pump
Motor 35 is respectively arranged at two ends with cooling water inlet electrically operated gate 13 and coolant outlet electrically operated gate 14, for carrying to electric pump motor 35
Cooling Water, takes away the heat produced when electric pump motor 35 runs.Electric pump aerofluxuss electrically operated gate 12 is arranged on the pump housing of electric pump 39,
Gas is produced for discharging when electric pump 39 runs.
Electric pump lubricating system includes：Electric pump grease-box 40, the first electric pump grease pump 22, the second electric pump grease pump
21st, electric pump lubricating oil heater 37, the first smoke exhaust fan 25, the second smoke exhaust fan 26, the first electric pump lubricating oil for oil screen 27,
Second electric pump lubricating oil supplies oil screen 28, the first electric pump lube oil cooler 29 and the second electric pump lube oil cooler 30.
Electric pump grease-box 40 is used to providing the oil sources of lubricating oil used by electric pump bearing, the first electric pump grease pump 22, the
Two electric pump grease pumps 21 and electric pump lubricating oil heater 37 are arranged in electric pump grease-box 40.First electric pump grease pump
22nd, the second electric pump grease pump 21 is connected in parallel, in the first electric pump grease pump 22, the exit of the second electric pump grease pump 21
It is respectively equipped with outlet non-return door 20 and outlet non-return door 19.First electric pump lubricating oil is for oil screen 27, the lubrication oil cooling of the first electric pump
But device 29 is successively set on the pipeline between the oil return inlet of electric pump grease pump outlet main pipe to electric pump grease-box 40.The
Two electric pump lubricating oil are connected in parallel for oil screen 27 with the first electric pump lubricating oil for oil screen 28, in the first electric pump lubricating oil fuel feeding
Filter screen 27 is respectively arranged at two ends with entrance electrically operated gate 1 and outlet electrically operated gate 2, the second electric pump lubricating oil for oil screen 28 two ends
It is respectively equipped with entrance electrically operated gate 3 and outlet electrically operated gate 4.Second electric pump lube oil cooler 30 and the first electric pump lube oil cooler
29 are connected in parallel, and are respectively arranged at two ends with entrance electrically operated gate 5 and outlet electrically operated gate 6 in the first electric pump lube oil cooler 29,
Second electric pump lube oil cooler 30 is respectively arranged at two ends with entrance electrically operated gate 7 and outlet electrically operated gate 8.First smoke exhaust fan 25,
Second smoke exhaust fan 26 is arranged in parallel on the pipeline between the upper outlet and air vent of electric pump grease-box 40, in first row
Cigarette blower fan 25 is respectively arranged at two ends with entrance electrically operated gate 16 and outlet non-return door 17, sets at the two ends of the second smoke exhaust fan 26 respectively
There are entrance electrically operated gate 15 and outlet non-return door 18.
As shown in figure 1, being additionally provided with other necessary pipes in this utility model embodiment thermal power plant electrically driven feed pump system
Road, valve and related thermal technology's measuring point etc..
The major function of thermal power plant's electrically driven feed pump system that this utility model embodiment is provided is to provide startup to boiler
Feedwater, the system mainly include electric pump water supply system and electric pump lubricating oil system, and electric pump lubricating oil system is carried to electric pump bearing
For lubricating oil, the heat that rotor is produced with bearing friction when electric pump 39 is normal to be run is taken away.Electric pump water supply system is by electric pump 39
Feedwater adherence pressure in oxygen-eliminating device 38 is delivered to into boiler, a portion feedwater walks recirculating line when electric pump 39 starts.
Electric pump lubricating oil system is by electric pump grease-box 40, grease pump 21 and grease pump 22, smoke exhaust fan 25 and smoke exhaust fan
26th, heater 37, filter (i.e. for oil screen 27 and supply oil screen 28), cooler 29 and cooler 30 and pipeline, valve with
And related thermal technology's measuring point composition.Electric pump water supply system is by oxygen-eliminating device 38, deaerator down-take pipe road, electric pump recirculating line, electricity
Pump discharge pipeline is completed to valve and related thermal technology's measuring point.In addition, electric pump motor 35 also needs to outer Cooling Water, motor is taken away
Caloric value when coil normally runs.Oil tank of the electric pump grease-box 40 as electric pump lubricating oil system, by grease pump 21
Or 22 lift certain pressure, impurity is filtered through filter, after cooler chilling temperature, resupply electric pump bearing lubrication and cold
But.The oil smoke that rotor and bearing friction are produced can be extracted out by smoke exhaust fan 25 or 26.Electric heater 37 is in order to by lubricating oil
Temperature is promoted to normal working temperature, and the premise of startup is that arbitrary grease pump has been turned on.Oxygen-eliminating device 38 is used as electric pump feedwater system
The water storage tank of system, there is provided electric pump feeds water, while starting the backwater for walking recirculating line after receiving electric pump 39.Electric pump drainage pipeline by
Electric pump entrance electrically operated gate 31, electric pump pump housing emptying valve 12, electric pump fore pump inlet screen 32 and electric pump main pump inlet filter screen 33
Composition.Before electric pump 39 starts, need to open the emptying 12 water filling aerofluxuss of valve of electric pump entrance electrically operated gate 31, the electric pump pump housing.Entrance is filtered
Net is used to prevent impurity from entering electric pump, causes electric pump locking accident.Electric pump export pipeline includes electric pump outlet non-return door 34 and electricity
Pump discharge electrically operated gate 9.When electric pump outlet non-return door 34 prevents electric pump from stopping, water pours in down a chimney the initiation pump housing and reverses accident.Electric pump is exported
Electrically operated gate 9, is opened then towards boiler water supply to the cut-off gate of boiler water supply as electric pump, and closing is also prevented from non-return flap and does not close tight
In the state of occur the pump housing reverse accident.Electric pump recirculating line includes electric pump recirculation regulating valve 11 and motorized recycling valve
10.When electric pump starts and electric pump low discharge runs, the conducting of recirculating line can ensure that the continuous operation stream of the minimum of electric pump
Amount, prevents electric pump from cavitation occurring.
In one embodiment, the water in oxygen-eliminating device 38 sequentially passes through that electric pump entrance electrically operated gate 31, electric pump is preposition to be pumped into all the way
Mouth filter screen 32, electric pump fore pump 23, electric pump main pump inlet filter screen 33, electric pump main pump 24, electric pump outlet non-return door 34 and electric pump go out
Mouthful electrically operated gate 9 enters power plant boiler, another road sequentially pass through electric pump entrance electrically operated gate 31, electric pump fore pump inlet screen 32,
Electric pump fore pump 23, electric pump main pump inlet filter screen 33, electric pump main pump 24, electric pump outlet non-return door 34, electric pump motorized recycling valve
10 return oxygen-eliminating device 38.
The first electric pumps of lubricating oil Jing grease pump 22 in one embodiment, in electric pump grease-box 40 (or second is electric
21) by the first electric pump lubricating oil, for oil screen 27, (or the second electric pump lubricating oil supplies oil screen to pump lubrication oil pump after adherence pressure
28) filter, the lubricating oil after filtration is cold by the first electric pump lube oil cooler 29 (or second electric pump lube oil cooler 30) again
But the bearing for supplying 39 electric pumps afterwards is cooled down and is lubricated, and takes away the heat of electric pump bearing generation, finally returns back to electric pump profit
Oil tank 40.Wherein, the first electric pump grease pump 22 and the second electric pump grease pump 21 are generally standby each other, but in certain condition
Under, it is also possible to while coming into operation.In the same manner, the first electric pump lube oil cooler 29 and the second electric pump lube oil cooler 30 can be with
It is standby each other, it is also possible to while coming into operation.
In one embodiment, the first smoke exhaust fan 25, the second smoke exhaust fan 26 for by electric pump grease-box 40 by
The oil smoke that one electric pump grease pump 22 (or second electric pump grease pump 21) is produced is extracted out.
In one embodiment, thermal power plant's electrically driven feed pump system also includes 4 buttons：Electrically driven feed pump system program is controlled
Logical operation button A1, electric pump grease pump block push button A2, smoke exhaust fan block push button A3 and manual confirmation electric pump air-discharging
Completing button A4.
Using electric pump grease pump block push button A2, automatically the first electric pump grease pump 22 and the second electric pump can be lubricated
21 used device of oil pump is interlocked.After interlocking input, if wherein one unit trip, another equipment can be interlocked rapidly and be opened
Dynamic, maintenance system is normally run.In the same manner, can be by the first smoke exhaust fan 25 and the second smoke evacuation using smoke exhaust fan block push button A4
26 used device of blower fan is interlocked, when wherein one smoke exhaust fan trips or cannot meet smoke evacuation demand, another Smoke
Machine automatic interlock starts, and maintenance system is normally run.
Starting step flow processs of the Fig. 2 for the on off control method of this utility model embodiment thermal power plant electrically driven feed pump system
Figure, as shown in Fig. 2 the starting step includes：
Step S101, judge whether 1. the first electric pump lubricating oil entrance electrically operated gate 1, outlet electrically operated gate 2 for oil screen 27
Open, 2. and the second electric pump lubricating oil for oil screen 28 entrance electrically operated gate 3, outlet electrically operated gate 4 close, 3. and the first electric pump profit
The entrance electrically operated gate 5 of oil cooler 29, outlet electrically operated gate 6 are opened, 4. and the second electric pump lube oil cooler 30 entrance electricity
Dynamic door 7, outlet electrically operated gate 8 close, 5. and the cooling water inlet electrically operated gate of electric pump motor 35,13 coolant outlet electrically operated gates 14
6. and the entrance electrically operated gate 16 of the first smoke exhaust fan 25, the entrance electrically operated gate 15 of the second smoke exhaust fan 26 are closed open,.If above-mentioned
There is any one condition to be unsatisfactory in 6 conditions, or there are multiple conditions to be unsatisfactory for, then carry out step S102, send unlatching
One electric pump lubricating oil is for oil screen entrance electrically operated gate 1, the instruction of outlet electrically operated gate 2, and closes the filter of the second electric pump lubricating oil fuel feeding
The instruction of web portal electrically operated gate 3, outlet electrically operated gate 4, and open the first electric pump lube oil cooler entrance electrically operated gate 5, outlet electricity
The instruction of dynamic door 6, and the second electric pump lube oil cooler entrance electrically operated gate 7, the instruction of outlet electrically operated gate 8 are closed, and open electricity
The cooling water inlet electrically operated gate 13 of pump motor 35, the instruction of coolant outlet electrically operated gate 14, and close the first smoke evacuation fans entrance
The instruction of the smoke evacuation fans entrance of electrically operated gate 16, second electrically operated gate 15.If the electrically operated gate of the unlatching is originally in step S101
Open, then can ignore the open command received in step S102；If the electrically operated gate sheet that should be closed in step S101
To close, then can ignore the out code received in step S102, similarly hereinafter.If above-mentioned 6 conditions all meet,
Step S103 is carried out then.
Step S103, judge whether the first electric pump grease pump 22 has been turned on.If the first electric pump grease pump 22 is not opened
It is dynamic, send the instruction (step S104) for starting the first electric pump grease pump 22.If the first electric pump grease pump 22 has been turned on, enter
Row step S105.
Step S105, judge oil temperature in electric pump grease-box 40 whether higher than preset temperature.If electric pump grease-box
Oil temperature in 40 is less than preset temperature, sends the instruction (step S106) for starting electric pump lubricating oil heater 37.If electric pump moistens
Oil temperature in oil tank 40 is higher than preset temperature, carries out step S107.
In one embodiment, above-mentioned preset temperature is 20 DEG C.
Step S107, judge electric pump grease pump outlet main-piping pressure whether more than the first preset pressure value.If electric pump
Grease pump outlet main-piping pressure is more than the first preset pressure value, carries out step S108.
Generally, above-mentioned first preset pressure value is 0.2MPa.
Step S108, judge whether to put into electric pump grease pump interlocking, and electric pump lubricating oil heater 37 has stopped work
Make.If not putting into electric pump grease pump interlocking or electric pump lubricating oil heater 37 not quitting work, or two conditions are all
It is unsatisfactory for, then sends the instruction of input electric pump grease pump interlocking, and the instruction (step for stopping electric pump lubricating oil heater 37
S109).If having put into electric pump grease pump interlocking, and electric pump lubricating oil heater 37 having been quit work, carries out step
S110。
Step S110, judge whether that the first smoke exhaust fan 25 has turned on, and the first smoke evacuation fans entrance electrically operated gate 16 is opened.
If the first smoke exhaust fan 25 is not opened or its entrance electrically operated gate 16 is not opened, or two conditions are all unsatisfactory for, then send startup
The instruction of the first smoke exhaust fan 25, and open the instruction (step S111) of the first smoke evacuation fans entrance electrically operated gate 16.If the
One smoke exhaust fan 25 has turned on, and the first smoke evacuation fans entrance electrically operated gate 16 is opened, carries out step S112.
Step S112, judge whether to put into smoke exhaust fan interlocking.If not putting into smoke exhaust fan interlocking, input row is sent
The instruction (step S113) of cigarette interlock of fan.If having put into smoke exhaust fan interlocking, step S114 is carried out.
Step S114, judge whether that 1. electric pump motorized recycling valve 10 and electric pump recirculation regulating valve 11 are opened, 2. and
Electric pump aerofluxuss electrically operated gate 12 is opened, 3. and electric pump outlet electrically operated gate 9 close.If there is any one condition in above three condition
It is unsatisfactory for, or has that two conditions are unsatisfactory for or three conditions are unsatisfactory for, then sends 10 He of unlatching electric pump motorized recycling valve
The instruction of electric pump recirculation regulating valve 11, and the instruction of electric pump aerofluxuss electrically operated gate 12 is opened, and close electronic outlet electrically operated gate 9
Instruction (step S115).If electric pump motorized recycling valve 10 and electric pump recirculation regulating valve 11 are opened, and electric pump aerofluxuss electricity
Dynamic door 12 is opened, and electric pump outlet electrically operated gate 9 is closed, then carry out step S116.
Step S116, judge electric pump entrance electrically operated gate 31 whether in non-closed mode.If electric pump entrance electrically operated gate 31
It is closed, sends the instruction (step S117) for opening electric pump entrance electrically operated gate 31 one scheduled time of time delay.If electric
Pump intake electrically operated gate 31 is in non-closed mode, carries out step S118.The purpose of the step be in order to give electric pump 39 water filling aerofluxuss,
So needing to judge the folding condition of electric pump entrance electrically operated gate 31." non-closed mode " herein and electric pump entrance electrically operated gate 31
Unlatching amplitude is relevant, and including various situations, for example, electric pump entrance electrically operated gate opens half or opens a seam, also belongs to
In " non-closed mode ".
In general, needing time delay 5s after opening electric pump entrance electrically operated gate 31, i.e., the above-mentioned scheduled time is 5s.
Step S118, judge whether electric pump aerofluxuss electrically operated gate 12 has completed aerofluxuss.If electric pump aerofluxuss electrically operated gate 12 is complete
Into aerofluxuss, step S119 is carried out.
Step S119, judge the whether standard-sized sheet of electric pump entrance electrically operated gate 31.If 31 non-standard-sized sheet of electric pump entrance electrically operated gate, send out
Go out to open the instruction (step S120) of electric pump entrance electrically operated gate 31.If the standard-sized sheet of electric pump entrance electrically operated gate 31, carries out step
S121。
Step S121, judge whether electric pump 39 has been turned on.If electric pump 39 is not actuated, the instruction for starting electric pump 39 is sent
(step S122).If electric pump 39 has been turned on, step S123 is carried out.
Step S123, judge electric pump outlet pressure whether more than the second preset pressure value.Second preset pressure value is usual
It is set to 15MPa.
The purpose of step S103～step S113 is the lubricating oil system for starting electric pump 39.Step S114～step S120
Purpose is for electrically driven feed pump pipeline water filling, and to give electric pump water filling air-discharging.The purpose of step S121～step S123 is to open
Dynamic electrically driven feed pump so as to which outlet pressure is more than 15MPa.
In one embodiment, the permissive condition of startup step sequence is：1. the water level in oxygen-eliminating device 38 is higher than preset water level；2. it is electric
Oil level in pump lubrication fuel tank 40 is higher than default oil level；3. the cooling water pressure for supplying electric pump 39 is more than the 3rd preset pressure value.
Normally, above-mentioned preset water level is 1500mm, and it is 800mm to preset oil level, and the 3rd preset pressure value is 0.3MPa.That is, entering
Before row step S101, needs prejudge water level in whether oxygen-eliminating device 38 higher than in 1500mm, and electric pump grease-box 40
Oil level be higher than 800mm, and for feed pump 39 cooling water pressure be more than 0.3MPa, in the situation that these three conditions all meet
Under, just allow to start.
Stopping flow chart of steps of the Fig. 3 for this utility model embodiment thermal power plant electrically driven feed pump on off control method, such as
Shown in Fig. 3, the stopping step mainly including：
Step S201, judge whether that electric pump 39 is out of service, and electric pump outlet electrically operated gate 9 is closed.If electric pump 39 is not
Out of service or electric pump outlet electrically operated gate 9 is not closed, or two conditions are all unsatisfactory for, then send the instruction of electric pump out of service 39,
And close the instruction (step S202) that electric pump exports electrically operated gate.If electric pump 39 is out of service, and electric pump outlet electrically operated gate 9 is
Close, carry out step S203.
Step S203, judge whether electric pump 39 stop after one Preset Time of time delay.If after electric pump 39 is out of service
Time delay reaches the default time, carries out step S204.
In one embodiment, time delay herein needs to reach 30min, just can guarantee that electric pump 39 is completely out of service.
Step S204, judge whether the cooling water inlet electrically operated gate 13 and coolant outlet electrically operated gate 14 of electric pump 39
Close.If the cooling water inlet electrically operated gate 13 of electric pump 39 is not closed or coolant outlet electrically operated gate 14 is not closed, or two electronic
Men Junwei is closed, then send the instruction (step of the cooling water inlet electrically operated gate 13 and coolant outlet electrically operated gate 14 of closing electric pump 39
S205).If the cooling water inlet electrically operated gate 13 of electric pump 39 and coolant outlet electrically operated gate 14 are closed, step S206 is carried out.
Step S206, judge whether to have dropped out electric pump grease pump interlocking, and have dropped out smoke exhaust fan interlocking.If do not moved back
Go out electric pump grease pump interlocking or do not exit smoke exhaust fan interlocking, or two interlockings are and exit, then send and exit electric pump profit
Instruction and exit the instruction (step S207) that smoke exhaust fan is interlocked that oil pump is interlocked.If having dropped out electric pump grease pump interlocking
And smoke exhaust fan interlocking is had dropped out, carry out step S208.
Step S208, judge whether that the first electric pump grease pump 22 and the second electric pump grease pump 21 are out of service,
And first smoke exhaust fan 25 and the second smoke exhaust fan 26 it is out of service.If the first electric pump grease pump 22, the second electric pump
There is any one equipment not out of service in grease pump 21, the first smoke exhaust fan 25 and the second smoke exhaust fan 26, or have many
Individual equipment is not out of service, then send the instruction of the first electric pump grease pump 22 out of service and the second electric pump grease pump 21,
And the instruction (step S209) of the first smoke exhaust fan 25 out of service and the second smoke exhaust fan 26.
On off control method shown in Fig. 2 and Fig. 3 is thermal power plant's electrically driven feed pump system in this utility model embodiment
Programed logic.Following functions can be realized using the programed logic：In thermal power plant's electrically driven feed pump system full cut-off shape
Under state, the automatic of electrically driven feed pump system is realized；Under thermal power plant's electrically driven feed pump system running state, realize it is electronic to
Water pump system is automatically stopped；When the startup program of thermal power plant's electrically driven feed pump system is run to a certain step, condition is unsatisfactory for,
If artificially judging, the condition can be ignored, and can carry out the operation that leapfrog action continues startup program manually, give until electronic
Water pump system startup is finished.
Each step of the on off control method shown in Fig. 2 and Fig. 3, first judge feedback whether receive, if receiving after
It is continuous to carry out next step；If do not received, receive etc. to be feedback.When due feedback signal is not received, programed logic
The step can be rested on, artificial operation is waited.Power plant operations staff can find the unreceived feedback signal of current operation step sequence, people
To judge whether unreceived feedback signal affects continuing executing with for program programed logic.If the feedback signal does not affect to work as
Front programed logic proceeds, and operations staff can operate leapfrog action to continue the execution of programed logic；If should
Feedback signal affects proceeding for present procedure control logic, then operations staff can be unsatisfied according to each for finding
Feedback signal, targetedly goes investigation problem, until receiving the feedback signal, continues executing with programed logic.
By the on off control method shown in Fig. 2 and Fig. 3, can be in thermal power plant's electrically driven feed pump system full cut-off state
Under, realize the automatic of electrically driven feed pump system；Under thermal power plant's electrically driven feed pump system running state, electronic feedwater is realized
Pumping system is automatically stopped.
Apply specific embodiment to be set forth principle of the present utility model and embodiment in this utility model, with
The explanation of upper embodiment is only intended to help and understands method of the present utility model and its core concept；Simultaneously for this area
Those skilled in the art, according to thought of the present utility model, will change in specific embodiments and applications, comprehensive
Upper described, this specification content is should not be construed as to restriction of the present utility model.
Claims (5)
1. a kind of thermal power plant's electrically driven feed pump system, it is characterised in that thermal power plant's electrically driven feed pump system includes：Electric pump is given
Water system and electric pump lubricating system；Wherein,
The electric pump water supply system includes：Oxygen-eliminating device, electric pump, electric pump inlet screen, electric pump entrance electrically operated gate, electric pump outlet non-return
Door, electric pump outlet electrically operated gate, electric pump aerofluxuss electrically operated gate, electric pump recirculation regulating valve and electric pump motorized recycling valve；Wherein, it is described
Electric pump includes electric pump fore pump, electric pump motor, electric pump main pump and electric pump main pump change speed gear box, and the electric pump motor is used to drive electric pump
Fore pump and the work of electric pump main pump；The electric pump inlet screen includes electric pump fore pump inlet screen and the filter of electric pump main pump inlet
Net；
The oxygen-eliminating device for supplying water to power plant boiler, the electric pump entrance electrically operated gate, electric pump fore pump inlet screen, electric pump
Fore pump, electric pump main pump inlet filter screen, electric pump main pump, electric pump outlet non-return door, electric pump outlet electrically operated gate are successively set on described
The lower part outlet of oxygen-eliminating device is to the pipeline between power plant boiler；The electric pump motorized recycling valve, electric pump recirculation are adjusted
Valve is successively set on the electric pump outlet non-return door to the pipeline between the oxygen-eliminating device upper entrance；In the electric pump motor
Be respectively arranged at two ends with cooling water inlet electrically operated gate and coolant outlet electrically operated gate, for the electric pump motor provide cooling
Water；The electric pump aerofluxuss electrically operated gate is arranged on the pump housing of the electric pump；
The electric pump lubricating system includes：Electric pump grease-box, the first electric pump grease pump, the second electric pump grease pump, electric pump
Lubricating oil heater, the first smoke exhaust fan, the second smoke exhaust fan, the first electric pump lubricating oil supply oil screen, the second electric pump lubricating oil
For oil screen, the first electric pump lube oil cooler and the second electric pump lube oil cooler；
The electric pump grease-box is used to providing the oil sources of lubricating oil used by electric pump bearing, the first electric pump grease pump, the
Two electric pump grease pumps and electric pump lubricating oil heater are arranged in the electric pump grease-box；The first electric pump lubricating oil
Pump, the second electric pump grease pump are connected in parallel, and punish in the outlet of the first electric pump grease pump, the second electric pump grease pump
Outlet non-return door is not provided with；The first electric pump lubricating oil is successively set on electricity for oil screen, the first electric pump lube oil cooler
On pipeline between the oil return inlet of pump lubricating oilses pump discharge main pipe to electric pump grease-box；The second electric pump lubricating oil fuel feeding
Filter screen is connected in parallel for oil screen with the first electric pump lubricating oil, electric for oil screen and second in the first electric pump lubricating oil
Pump lubricating oilses for oil screen be respectively arranged at two ends with entrance electrically operated gate and outlet electrically operated gate；The second electric pump lube oil cooler
It is connected in parallel with the first electric pump lube oil cooler, in the first electric pump lube oil cooler and the second electric pump lubrication oil cooling
Device be respectively arranged at two ends with entrance electrically operated gate and outlet electrically operated gate；First smoke exhaust fan, the second smoke evacuation fan parallel-connection are arranged
On pipeline between the upper outlet and air vent of the electric pump grease-box, in first smoke exhaust fan, the second smoke evacuation
Blower fan is respectively arranged at two ends with entrance electrically operated gate and outlet non-return door.
2. thermal power plant's electrically driven feed pump system according to claim 1, it is characterised in that the water in the oxygen-eliminating device is all the way
Sequentially pass through the electric pump entrance electrically operated gate, electric pump fore pump inlet screen, electric pump fore pump, electric pump main pump inlet filter screen, electricity
Pump main pump, electric pump outlet non-return door and electric pump outlet electrically operated gate enters power plant boiler, and another road sequentially passes through the electric pump and enters
Mouth electrically operated gate, electric pump fore pump inlet screen, electric pump fore pump, electric pump main pump inlet filter screen, electric pump main pump, electric pump outlet non-return
Door, electric pump motorized recycling valve return the oxygen-eliminating device.
3. thermal power plant's electrically driven feed pump system according to claim 1, it is characterised in that in the electric pump grease-box
Lubricating oil is supplied by the first electric pump lubricating oil Jing after the first electric pump grease pump and/or the second electric pump grease pump adherence pressure
Oil screen and/or the second electric pump lubricating oil fuel feeding strainer filtering, the lubricating oil after filtration is again by the first electric pump lube oil cooler
And/or second supply the bearing of the electric pump after the cooling of electric pump lube oil cooler and cooled down and lubricated, institute is finally returned back to
State electric pump grease-box.
4. thermal power plant's electrically driven feed pump system according to claim 3, it is characterised in that first smoke exhaust fan and/
Or second smoke exhaust fan extract out for the oil smoke that produces the first electric pump grease pump and/or the second electric pump grease pump.
5. thermal power plant's electrically driven feed pump system according to claim 1, it is characterised in that thermal power plant's electrically driven feed pump
System also includes：Electrically driven feed pump system program control logic operation button, electric pump grease pump block push button, smoke exhaust fan connection
Lock button and manual confirmation electric pump air-discharging completing button.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201621094974.1U CN206073051U (en) | 2016-09-29 | 2016-09-29 | A kind of thermal power plant's electrically driven feed pump system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201621094974.1U CN206073051U (en) | 2016-09-29 | 2016-09-29 | A kind of thermal power plant's electrically driven feed pump system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106168372A (en) * | 2016-09-29 | 2016-11-30 | 华北电力科学研究院有限责任公司 | A kind of thermal power plant's electrically driven feed pump system and on off control method thereof |
| CN107121951A (en) * | 2017-04-24 | 2017-09-01 | 山东国电技术咨询有限公司 | A kind of interlock protection function input exits monitoring system and method |
| CN110397909A (en) * | 2019-08-20 | 2019-11-01 | 华能国际电力股份有限公司 | Water supply feedforward control system and method based on feed pump recycle valve state |
-
2016
- 2016-09-29 CN CN201621094974.1U patent/CN206073051U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106168372A (en) * | 2016-09-29 | 2016-11-30 | 华北电力科学研究院有限责任公司 | A kind of thermal power plant's electrically driven feed pump system and on off control method thereof |
| CN106168372B (en) * | 2016-09-29 | 2019-01-25 | 华北电力科学研究院有限责任公司 | A kind of thermal power plant's electrically driven feed pump system and its start-up and shut-down control method |
| CN107121951A (en) * | 2017-04-24 | 2017-09-01 | 山东国电技术咨询有限公司 | A kind of interlock protection function input exits monitoring system and method |
| CN110397909A (en) * | 2019-08-20 | 2019-11-01 | 华能国际电力股份有限公司 | Water supply feedforward control system and method based on feed pump recycle valve state |
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