CN104989463A - Power generation system in power station - Google Patents
Power generation system in power station Download PDFInfo
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- CN104989463A CN104989463A CN201510329138.0A CN201510329138A CN104989463A CN 104989463 A CN104989463 A CN 104989463A CN 201510329138 A CN201510329138 A CN 201510329138A CN 104989463 A CN104989463 A CN 104989463A
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- Prior art keywords
- valve
- condenser
- heat
- heating
- boiler
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- 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
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- 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
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- 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 turbine, a generator and a waste heat recovery system; and as an afterheat recovery working mode of a hydraulic coupler is controlled according to the pressure demand, when the steam pressure of the boiler is located in pressure control and full load, the power loss caused by heating condensed water through working oil of the hydraulic coupler is prevented.
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 (5)
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; It is characterized in that: 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.
2. power generation system according to claim 1, is characterized in that: described particular value is the value of sliding pressure indicatrix.
3. power generation system according to claim 2, is characterized in that: 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.
4. power generation system according to claim 3, is characterized in that: 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.
5. the power generation system in power station, comprises Waste Heat Recovery System (WHRS), and 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; It is characterized in that: also comprise pressure controller.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510329138.0A CN104989463A (en) | 2015-06-15 | 2015-06-15 | Power generation system in power station |
| CN201510998312.0A CN105443166A (en) | 2015-06-15 | 2015-06-15 | Power generation system in power station |
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 |
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| CN201510998312.0A Division CN105443166A (en) | 2015-06-15 | 2015-06-15 | Power generation system in power station |
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| CN104989463A true CN104989463A (en) | 2015-10-21 |
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| 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 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510998312.0A Pending CN105443166A (en) | 2015-06-15 | 2015-06-15 | Power generation system in power station |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112576326A (en) * | 2020-12-07 | 2021-03-30 | 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 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112576326A (en) * | 2020-12-07 | 2021-03-30 | 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 |
| 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 |
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| CN105443166A (en) | 2016-03-30 |
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