CN105443166A - Power generation system in power station - Google Patents
Power generation system in power station Download PDFInfo
- Publication number
- CN105443166A CN105443166A CN201510998312.0A CN201510998312A CN105443166A CN 105443166 A CN105443166 A CN 105443166A CN 201510998312 A CN201510998312 A CN 201510998312A CN 105443166 A CN105443166 A CN 105443166A
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- China
- Prior art keywords
- valve
- condenser
- steam turbine
- boiler
- vaporizer
- 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.)
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- 238000010248 power generation Methods 0.000 title claims abstract description 16
- 239000002826 coolant Substances 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 79
- 238000010438 heat treatment Methods 0.000 claims description 29
- 239000006200 vaporizer Substances 0.000 claims description 26
- 239000003795 chemical substances by application Substances 0.000 claims description 12
- 238000005057 refrigeration Methods 0.000 claims description 12
- 230000005494 condensation Effects 0.000 claims description 5
- 238000009833 condensation Methods 0.000 claims description 5
- 239000003507 refrigerant Substances 0.000 claims description 3
- 239000002918 waste heat Substances 0.000 abstract description 13
- 239000003921 oil Substances 0.000 description 16
- 238000011084 recovery Methods 0.000 description 5
- 238000004064 recycling Methods 0.000 description 5
- 239000013256 coordination polymer Substances 0.000 description 4
- 230000005611 electricity Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003245 coal Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000659 freezing mixture Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000009993 protective function Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K13/00—General layout or general methods of operation of complete plants
- F01K13/006—Auxiliaries or details not otherwise provided for
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention provides a power generation system in a power station. The power generation system comprises a boiler, a steam turbine, a generator, a first waste heat circulating system and a second waste heat circulating system, wherein the first waste heat circulating system and the second waste heat circulating system adopt the same evaporator; and an outlet of the evaporator is controlled through a switch for controlling a valve to enable a cooling agent to reach different condensers, so that the utilization of equipment in the system is reduced, and working oil loss generated because the working oil in a hydraulic coupler enters different waste heat circulating systems can be avoided.
Description
Technical field
The present invention relates to a kind of power generation system, especially relate to the power generation system in a kind of power station.
Background technique
Electric generating station system generally includes steam generator, steam turbine and generator, and the water vapour that steam generator generates orders about steam turbine motion, and make the interior of water vapour change into mechanical energy, steam turbine is generated electricity by the generator be coupled with it.
In electric generating station system, water supply pump motor needs to consume a certain amount of driving device merit, is the equipment of wasted work the most in balance of power plant.Feed water pump power consumption accounts for 2.5% of generated energy, accounts for nearly 30% of auxiliary power consumption rate of power plant, directly affects net coal consumption rate, affect cost of electricity-generating, affect energy consumption.
Hydraulic couplers is mainly used in the boiler feed water pump assembly of electric generating station system; be used for using liquid oils as medium transferring power to the coupling of work mechanism; torsional moment and angular velocity can be changed reposefully; realize stepless change; its starting torque is less and have overload protective function, can protect motor and water pump preferably.Hydraulic couplers is adopted to carry out the electrically driven feedpump of speed governing, due to the actual operating efficiency of hydraulic couplers in the most of the time lower than 85%, the efficiency of its loss mainly passes to working oil with the form of heat, and the heat of working oil is taken away in vain by subsidiary engine cooling water, causes heat waste.
In prior art, 201080062410.9 patent of invention in, provide the heat that can be recovered in the slip loss in hydraulic couplers by reclaiming used heat in the working fluid that gives off from hydraulic couplers, and utilize the power generation system that the used heat reclaimed generates electricity.It by using the condensed water of working oil as heat source feed-water pump of hydraulic couplers or the low pressure steam from turbine exhaust, thus reaches the object of waste heat recovery.Only use heating condensate water in this invention or from a kind of scheme the low pressure steam of turbine exhaust, when wherein the working oil of hydraulic couplers heats the condensed water of feed-water pump, the efficiency of heating surface of boiler can be improved, thus improve generating efficiency.If but when the vapor tension of boiler is in Stress control and full load, the working oil heating condensate water of hydraulic couplers causes producing unnecessary pressure, thus need to use control valve to guide steam by steam turbine, thus cause power loss.
Summary of the invention
The invention provides the power generation system in a kind of power station, it can according to pressure demand, control the working method of heat recovery of hydraulic couplers, thus when avoiding the vapor tension of boiler to be in Stress control and full load, the power loss that the working oil heating condensate water of hydraulic couplers causes.
As one aspect of the present invention, provide the power generation system in a kind of power station, comprise boiler, steam turbine, generator, the first condenser, boiler feed water pump, hydraulic couplers, condensate extractionpump and water heater; Wherein boiler feed water pump is used for water to be fed to boiler; Hydraulic couplers is arranged at boiler feed water pump and for driving between boiler feed water pump motor, for variable speed driving boiler feed water pump; Water heating is generated high pressure high temperature vapor by boiler; High pressure high temperature vapor driving steam turbine moves, thus makes the electrical power generators being coupled to steam turbine; Low pressure steam is discharged to condensation the first condenser from steam turbine, and the condensed water in the first condenser is pumped into water heater by condensate extractionpump; Wherein also comprise the first valve, the second valve, the 3rd valve, the first heat pump circulating system, the second heat pump circulating system and pressure controller; Described hydraulic couplers is connected with the first heat pump circulating system by the first valve, is connected with the second heat pump circulating system by the second valve; Described 3rd valve is arranged between described first heat pump circulating system and described steam turbine; The superheated vapor that described first heat pump circulating system exports is introduced in the intergrade of steam turbine; Described second heat pump circulating system is for heating the condensed water of the first condenser supply; Described pressure controller is used for vapor tension and controls, and can arrange particular value, when exceeding particular value, open the first valve and the 3rd valve, closing the second valve; When lower than particular value, open the second valve, close the first valve and the 3rd valve.
Preferably, in such scheme, described first heat pump circulating system, comprises vaporizer, the second condenser; The working oil discharged from described hydraulic couplers is supplied to vaporizer, is used for heating and cooling agent; The steam of refrigeration agent and turbine exhaust heat exchange thus heating steam in the second condenser.
Preferably, in such scheme, described second heat pump circulating system, comprises vaporizer, the 3rd condenser and heat exchanger; The working oil wherein discharged from described hydraulic couplers is fed to vaporizer, is used for heating described refrigeration agent; Refrigeration agent after heating is supplied to the 3rd condenser, is used for the heat exchange medium of heating the 3rd condenser; Heat exchange medium and condensed water carry out heat exchange and heating condensate water in a heat exchanger.
As another aspect of the present invention, provide the power generation system in a kind of power station, comprise boiler, steam turbine, generator, the first condenser, boiler feed water pump, hydraulic couplers, condensate extractionpump and water heater; Wherein boiler feed water pump is used for water to be fed to boiler; Hydraulic couplers is arranged at boiler feed water pump and for driving between boiler feed water pump motor, for variable speed driving boiler feed water pump; Water heating is generated high pressure high temperature vapor by boiler; High pressure high temperature vapor driving steam turbine moves, thus makes the electrical power generators being coupled to steam turbine; Low pressure steam is discharged to condensation the first condenser from steam turbine, and the condensed water in the first condenser is pumped into water heater by condensate extractionpump; Wherein also comprise vaporizer, the second condenser, heat exchanger, the 3rd condenser, the first valve, the second valve, the 3rd valve and pressure controller; The working oil wherein discharged from described hydraulic couplers is fed to vaporizer, is used for heating and cooling agent; Vaporizer is connected respectively with the second condenser and the 3rd condenser; Second condenser is for providing the heat exchange of the steam of refrigeration agent and turbine exhaust thus heating steam, and the superheated vapor that the second condenser exports is introduced in the intergrade of steam turbine; In 3rd condenser, refrigerant heat heat exchange medium wherein; In heat exchanger, heat exchange medium and condensed water carry out heat exchange and heating condensate water; Described first valve is arranged between vaporizer and the second condenser; Described second valve is arranged between vaporizer and described 3rd condenser; Described 3rd valve is arranged between described second condenser and described steam turbine; Described pressure controller is used for vapor tension and controls, and can arrange particular value, when exceeding particular value, open the first valve and the 3rd valve, closing the second valve; When lower than particular value, open the second valve, close the first valve and the 3rd valve.
Preferably, in such scheme, described particular value is the value of sliding pressure indicatrix.
As another one part of the present invention, provide the power generation system in a kind of power station, comprise Waste Heat Recovery System (WHRS), it by using the condensed water of working oil as heat source feed-water pump of hydraulic couplers or the low pressure steam from turbine exhaust, thus realizes waste heat recovery; Also comprise pressure controller, described pressure controller is used for vapor tension and controls.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the first embodiment of the present invention.
Fig. 2 is the schematic diagram of the second embodiment of the present invention.
Embodiment
In order to be illustrated more clearly in the embodiment of the present invention or technological scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Embodiment one
See Fig. 1, power generation system of the present invention, comprises boiler 1, steam turbine 2, generator 3, the first condenser 4, boiler feed water pump BP, water heater 5, hydraulic couplers 6, condensate extractionpump CP.Boiler feed water pump BP is used for water to be fed in boiler 1, and water is heated as high pressure high temperature vapor in the boiler.Hydraulic couplers 6 is arranged at boiler feed water pump BP and for driving between boiler feed water pump motor M, for variable speed driving boiler feed water pump BP.Water heating is generated high pressure high temperature vapor by boiler 1; High pressure high temperature vapor driving steam turbine 2 moves, thus the generator 3 being coupled to steam turbine 2 is generated electricity.Low pressure steam is discharged to condensation the first condenser 4 from steam turbine, and the condensed water in the first condenser 4 is pumped into water heater by condensate extractionpump CP, thus forms a power generation cycle.
Power generation system also comprises the first valve 11, second valve the 12, three valve 13, first heat pump circulating system, the second heat pump circulating system and pressure controller.Hydraulic couplers 6 is connected with the first heat pump circulating system by the first valve.First heat pump circulating system, comprises vaporizer E1, the second condenser C1.When first valve 11 is opened, the working oil discharged from hydraulic couplers 6 is supplied to vaporizer E1, is used for the refrigeration agent heated wherein.Refrigeration agent is compressed after evaporating in vaporizer E1 within the compressor, is then supplied to condenser C1.3rd valve 13 is arranged between the vapor outlet port of condenser C1 and steam turbine 2.When second valve 13 is opened, in condenser C1, a part of low pressure steam discharged from steam turbine 2 is carried out heat exchange by after compressor compresses with refrigeration agent.Low-pressure steam is introduced in the intergrade of steam turbine 2 in condenser C1 by overheated steam, and is used for driving steam turbine 2.The used heat of the hydraulic couplers 6 recycled by this does not enter boiler, thus can not increase the vapour tension of boiler.
Second heat pump circulating system, comprises vaporizer E2, the 3rd condenser C2 and heat exchanger 50.Second valve 12 is arranged between the second heat pump circulating system and hydraulic couplers 6.During the second valve opening, the working oil that hydraulic couplers 6 discharges is fed to vaporizer E2, is used for the refrigeration agent heated wherein.After refrigeration agent after heating is compressed within the compressor, be supplied to the 3rd condenser C2, be used for the heat exchange medium heated wherein.Heat exchange medium and condensed water carry out heat exchange and heating condensate water in heat exchanger 50.Condensed water after heating is admitted in boiler 1 after again heating in water heater 5.The used heat of the hydraulic couplers 6 recycled by this enters boiler, can improve the efficiency of heating surface of boiler, thus improves generating efficiency.
Pressure controller comprises vapor pressure sensor, controls, can arrange particular value, when exceeding particular value, open the first valve and the 3rd valve, closing the second valve for vapor tension; When lower than particular value, open the second valve, close the first valve and the 3rd valve.This particular value can be the value of sliding pressure indicatrix in the patent of invention as 201080042337.9.By above-mentioned setting of the present invention, make the present invention can according to pressure demand, control the working method of the heat recovery of hydraulic couplers, when Stress control and full load, use the first recycling waste heat comprising the first heat pump circulating system, when normal condition, use the second recycling waste heat comprising the second heat pump circulating system, thus power loss when avoiding Stress control and full load.
Embodiment two
See Fig. 2, the second embodiment of the present invention, power generation system of the present invention, comprises boiler 1, steam turbine 2, generator 3, the first condenser 4, boiler feed water pump BP, water heater 5, hydraulic couplers 6, condensate extractionpump CP.Boiler feed water pump BP is used for water to be fed in boiler 1.Hydraulic couplers 6 is arranged at boiler feed water pump BP and for driving between boiler feed water pump motor M, for variable speed driving boiler feed water pump.Water heating is generated high pressure high temperature vapor by boiler 1, and high pressure high temperature vapor driving steam turbine 2 moves, thus the generator 3 being coupled to steam turbine is generated electricity.Low pressure steam is discharged to condensation the first condenser 4 from steam turbine, and the condensed water in the first condenser 4 is pumped into water heater 5 by condensate extractionpump CP.
In the present embodiment, also comprise vaporizer E, the second condenser C1, heat exchanger 50, the 3rd condenser C2, the first valve 11, second valve the 12, three valve 13 and pressure controller.The working oil discharged from hydraulic couplers 6 is fed to vaporizer E, is used for the refrigeration agent heated wherein.Vaporizer E is connected respectively with the second condenser C1 and the 3rd condenser C2.Second condenser C1 is for the heat exchange of steam that provides refrigeration agent and steam turbine 2 and discharge thus heating steam.The superheated vapor that second condenser C1 exports is introduced in the intergrade of steam turbine 2.In 3rd condenser C2, refrigerant heat heat exchange medium wherein.In heat exchanger 50, heat exchange medium and condensed water carry out heat exchange and heating condensate water.First valve 11 is arranged between vaporizer E and the second condenser C1.Second valve 12 is arranged between vaporizer E and the 3rd condenser C2.3rd valve 13 is arranged between the second condenser C1 and the vapor outlet port of steam turbine 2.Pressure controller is used for vapor tension and controls, and can arrange particular value, when exceeding particular value, open the first valve 11 and the 3rd valve 13, closing the second valve 12; When lower than particular value, open the second valve 12, close the first valve 11 and the 3rd valve 13.
The difference of the second embodiment and the first embodiment is, in a second embodiment, by comprising the first recycling waste heat system of the first heat pump circulating system and comprising the second recycling waste heat system of the second heat pump circulating system, uses identical vaporizer.By the outlet of the switch control rule vaporizer of control valve, make freezing mixture arrive different condensers, saved the use of devices in system, and the working oil in hydraulic couplers can be avoided to enter the loss of the working oil that different recycling waste heat systems causes.
In all documents incorporated by reference all in this application that the present invention mentions, just quoted separately as a reference as each section of document.In addition should be understood that those skilled in the art can make various changes or modifications the present invention after having read above-mentioned disclosure of the present invention, these equivalent form of values fall within the application's appended claims limited range equally.
Claims (1)
1. the power generation system in power station, comprises boiler, steam turbine, generator, the first condenser, boiler feed water pump, hydraulic couplers, condensate extractionpump and water heater; Wherein boiler feed water pump is used for water to be fed to boiler; Hydraulic couplers is arranged at boiler feed water pump and for driving between boiler feed water pump motor, for variable speed driving boiler feed water pump; Water heating is generated high pressure high temperature vapor by boiler; High pressure high temperature vapor driving steam turbine moves, thus makes the electrical power generators being coupled to steam turbine; Low pressure steam is discharged to condensation the first condenser from steam turbine, and the condensed water in the first condenser is pumped into water heater by condensate extractionpump; Wherein also comprise vaporizer, the second condenser, heat exchanger, the 3rd condenser, the first valve, the second valve, the 3rd valve and pressure controller; The working oil wherein discharged from described hydraulic couplers is fed to vaporizer, is used for heating and cooling agent; Vaporizer is connected respectively with the second condenser and the 3rd condenser; Second condenser is for providing the heat exchange of the steam of refrigeration agent and turbine exhaust thus heating steam, and the superheated vapor that the second condenser exports is introduced in the intergrade of steam turbine; In 3rd condenser, refrigerant heat heat exchange medium wherein; In heat exchanger, heat exchange medium and condensed water carry out heat exchange and heating condensate water; Described first valve is arranged between vaporizer and the second condenser; Described second valve is arranged between vaporizer and described 3rd condenser; Described 3rd valve is arranged between described second condenser and described steam turbine; Described pressure controller is used for vapor tension and controls, and can arrange particular value, when exceeding particular value, open the first valve and the 3rd valve, closing the second valve; When lower than particular value, open the second valve, close the first valve and the 3rd valve.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510329138.0A CN104989463A (en) | 2015-06-15 | 2015-06-15 | Power generation system in power station |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510329138.0A Division CN104989463A (en) | 2015-06-15 | 2015-06-15 | Power generation system in power station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105443166A true CN105443166A (en) | 2016-03-30 |
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Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510329138.0A Pending CN104989463A (en) | 2015-06-15 | 2015-06-15 | Power generation system in power station |
| CN201510998312.0A Pending CN105443166A (en) | 2015-06-15 | 2015-06-15 | Power generation system in power station |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510329138.0A Pending CN104989463A (en) | 2015-06-15 | 2015-06-15 | Power generation system in power station |
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| Country | Link |
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| CN (2) | CN104989463A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112576326B (en) * | 2020-12-07 | 2023-10-13 | 润电能源科学技术有限公司 | Sliding pressure optimal operation control method, device and equipment for thermal power generating unit |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1047209B (en) * | 1955-12-29 | 1958-12-24 | Gelsenkirchener Bergwerks Ag | Steam turbine power plant with feed water preheating |
| JPH08135907A (en) * | 1994-11-07 | 1996-05-31 | Toshiba Corp | Feed water pump rapidly starting device |
| CN201526656U (en) * | 2009-10-23 | 2010-07-14 | 张莉红 | Energy recovery system of hydraulic coupler |
| CN101818662A (en) * | 2010-03-26 | 2010-09-01 | 浙江省电力试验研究院 | Novel method for controlling high-pressure steam source of feedwater pump steam turbine |
| CN102575530A (en) * | 2009-09-22 | 2012-07-11 | 西门子公司 | Power plant system having overload control valve |
| CN102725483A (en) * | 2010-01-28 | 2012-10-10 | 株式会社荏原制作所 | Power generating system |
-
2015
- 2015-06-15 CN CN201510329138.0A patent/CN104989463A/en active Pending
- 2015-06-15 CN CN201510998312.0A patent/CN105443166A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1047209B (en) * | 1955-12-29 | 1958-12-24 | Gelsenkirchener Bergwerks Ag | Steam turbine power plant with feed water preheating |
| JPH08135907A (en) * | 1994-11-07 | 1996-05-31 | Toshiba Corp | Feed water pump rapidly starting device |
| CN102575530A (en) * | 2009-09-22 | 2012-07-11 | 西门子公司 | Power plant system having overload control valve |
| CN201526656U (en) * | 2009-10-23 | 2010-07-14 | 张莉红 | Energy recovery system of hydraulic coupler |
| CN102725483A (en) * | 2010-01-28 | 2012-10-10 | 株式会社荏原制作所 | Power generating system |
| CN101818662A (en) * | 2010-03-26 | 2010-09-01 | 浙江省电力试验研究院 | Novel method for controlling high-pressure steam source of feedwater pump steam turbine |
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| Publication number | Publication date |
|---|---|
| CN104989463A (en) | 2015-10-21 |
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Application publication date: 20160330 |
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