CN205477782U - Utilize ejector to adjust power generation system of little steam turbine of air supply drive water -feeding pump - Google Patents
Utilize ejector to adjust power generation system of little steam turbine of air supply drive water -feeding pump Download PDFInfo
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- CN205477782U CN205477782U CN201620198813.0U CN201620198813U CN205477782U CN 205477782 U CN205477782 U CN 205477782U CN 201620198813 U CN201620198813 U CN 201620198813U CN 205477782 U CN205477782 U CN 205477782U
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Abstract
The utility model discloses an utilize ejector to adjust power generation system of little steam turbine of air supply drive water -feeding pump who belongs to the energy -conserving field in power station. This system mainly comprises parts such as boiler, steam turbine, condenser, regenerator, generator, control valve, ejector, blender, little steam turbine, water -feeding pumps. When unit operate in a variable working condition, select different steam turbines through the ejector and draw gas as the vapour source of the little steam turbine of steam feed pump, inflation acting in little steam turbine, drive water -feeding pump. The utility model discloses according to the change of unit load, steam through different parameters in the extraction steam turbine makes little steam turbine possess best heat source, has realized the ladder utilization of energy to improve the generating efficiency of unit.
Description
Technical field
This utility model belongs to energy-saving and emission-reduction apparatus field, particularly to a kind of electricity generation system utilizing injector regulation source of the gas to drive the little steam turbine of feed pump.
Background technology
Under national energy-saving reduction of discharging policy, little unit is gradually eliminated, and newly-built large-sized unit steam turbine single-machine capacity and steam parameter are more and more higher；Owing to thermal power plant is a complicated therrmodynamic system, in order to improve its economy run, not only need to improve engine efficiency, but also configuration and the method for operation of all subsidiary engines in therrmodynamic system need to be improved.Feed pump is the subsidiary engine that power plant is important, and as the power consumption rich and influential family in power plant, its operation conditions is to reduce the emphasis link of station service power consumption rate, so the method for operation optimizing feed pump has important practice significance.
Current unit is commonly used four sections of little steam turbines of drive that draw gas when high load capacity, use reheated steam to draw gas when underload, and even main steam is drawn gas and driven little steam turbine；Under same load, parameter of drawing gas is of a relatively high, and during unit load change, vapour source switching of drawing gas is discontinuous, the problems such as this can cause part high-grade energy loss, and the operational efficiency of unit is low；And use the little steam turbine of steam drive of more low parameter for whole electricity generation system, and energy consumption can be reduced further, gradually switching source of the gas also can make unit operation more steady.The utility model proposes one and utilize injector mixed steam source, reduce steam parameter and drive the electricity generation system of little steam turbine acting, and the little steam turbine requirement to vapour source under different load can be met, the fully low-grade energy of Appropriate application power plant, it is effectively improved the efficiency of unit, reduce coal consumption amount, there is important theoretical and practical significance.
Summary of the invention
When the purpose of this utility model is for Power Plant heavy-duty service, the commonly used 4th section of vapour source drawn gas as the little steam turbine of feed pump, during underrun, commonly used reheated steam even main steam of drawing gas is drawn gas the vapour source as the little steam turbine of feed pump, this method is higher due to steam parameter, can cause the problems such as part high-grade energy loss；Now proposing a kind of to utilize injector regulation feed pump little steam turbine vapour source and can adapt to the electricity generation system in variable working condition, the ladder adequately and reasonably realizing energy utilizes, thus improves unit thermal efficiency of cycle, reduces coa consumption rate.
For reaching above-mentioned purpose, this utility model have employed techniques below scheme.
A kind of electricity generation system utilizing injector regulation source of the gas to drive steam feed pump, this system mainly includes boiler, steam turbine, condenser, regenerator, electromotor, control valve, injector, blender, little steam turbine, feed pump etc..It is characterized in that, boiler 1, high pressure cylinder 2, intermediate pressure cylinder 3, left side low pressure (LP) cylinder 4, right side low pressure (LP) cylinder 5, electromotor 6 are in series；Left side low pressure (LP) cylinder 4, right side low pressure (LP) cylinder 5 steam discharge enter condensate pump 8 through condenser 7；Condensation water passes sequentially through the 7th grade of low-pressure heater 9, the 6th grade of low-pressure heater 10 and level V low-pressure heater 11 and enters oxygen-eliminating device 12；Oxygen-eliminating device 12 water outlet, after feed pump 13 pressurizes, flows successively through third level high-pressure heater 14, second level high-pressure heater 15, first order high-pressure heater 16, eventually enters into boiler 1 and form closed circuit.After wherein steam turbine different parameters draws gas and enters heaters at different levels, the hydrophobic mode taking to flow automatically step by step.Reheated steam is connected with steam ejector 24 by control valve 20, and four sections are drawn gas and are connected with steam ejector 24 by control valve 23；Four sections are drawn gas and are connected with steam ejector 17 by control valve 21, and six sections are drawn gas and are connected with steam ejector 17 by control valve 22；Steam ejector 17 is all connected with blender 18 with steam ejector 24；Blender 18 outlet vapor is connected with condenser through too small steam turbine 19.
Described steam ejector 17, is drawn gas by four sections of injections six sections that draw gas, and wherein four sections of extraction flows are controlled by control valve 21, and six sections of extraction flows are controlled by control valve 22, and mass ratio of induced-to-inducing air specifically can be chosen according to the unit pressure after parameter and mixing that draws gas；Steam ejector 24 is drawn gas by reheated steam injection four sections, and wherein reheated steam flow is controlled by control valve 20, and four sections are drawn gas and controlled by control valve 23.Steam ejector mixed low parameter steam enters little steam turbine 19 through blender 18 and does work, and little steam turbine 19 is coaxially connected with feed pump 13, and little steam turbine 19 steam discharge enters condenser 7.
Described unit is when heavy-duty service, closing control valve 20,23, opening controlling valve 21,22, make four sections of (1.02MPa that draw gas, 361.09 DEG C) and six sections of (0.24MPa that draw gas, 196.09 DEG C) as little steam turbine 19 vapour source, mixed steam parameter draws gas lower compared with four sections, preferably make use of power plant's tow taste heat；Unit when underrun, gradually opening controlling valve 20,23, progressively close off control valve 21,22, make reheated steam with four sections draw gas as little steam turbine 19 vapour source, it is ensured that thermal source mates with little steam turbine.
Accompanying drawing explanation
Fig. 1 is a kind of electricity generation system utilizing injector regulation vapour source to drive steam feed pump.
In figure: 1-boiler；2-steam turbine high-pressure cylinder；3-Steam Turbine Through IP Admission；Low pressure (LP) cylinder on the left of 4-steam turbine；Low pressure (LP) cylinder on the right side of 5-steam turbine；6-electromotor；7-condenser；8-condensate pump；The 7th grade of low-pressure regenerator of 9-；The 6th grade of low-pressure regenerator of 10-；11-level V low-pressure regenerator；12-oxygen-eliminating device；13-feed pump；14-third level high-pressure extraction device；15-second level high-pressure extraction device；16-first order high-pressure extraction device；17-steam ejector；18-blender；The little steam turbine of 19-；20-control valve；21-control valve；22-control valve；23-control valve；24-steam ejector.
Detailed description of the invention
During utility model works, mixing two strands by injector and draw gas, relative reduction draws gas parameter, drive the acting of feed pump little steam turbine, preferably utilize low grade heat energy, increase unit entirety cycle efficieny, below in conjunction with the accompanying drawings this utility model embodiment is described further.
Fig. 1 is a kind of electricity generation system utilizing injector regulation source of the gas to drive the little steam turbine of feed pump.
A kind of electricity generation system utilizing injector regulation source of the gas to drive the little steam turbine of feed pump, this system mainly includes boiler, steam turbine, condenser, regenerator, electromotor, control valve, injector, blender, little steam turbine, feed pump etc..It is characterized in that, boiler 1, high pressure cylinder 2, intermediate pressure cylinder 3, left side low pressure (LP) cylinder 4, right side low pressure (LP) cylinder 5, electromotor 6 are in series；Left side low pressure (LP) cylinder 4, right side low pressure (LP) cylinder 5 steam discharge enter condensate pump 8 through condenser 7；Condensation water passes sequentially through the 7th grade of low-pressure heater 9, the 6th grade of low-pressure heater 10 and level V low-pressure heater 11 and enters oxygen-eliminating device 12；Oxygen-eliminating device 12 water outlet, after feed pump 13 pressurizes, flows successively through third level high-pressure heater 14, second level high-pressure heater 15, first order high-pressure heater 16, eventually enters into boiler 1 and form closed circuit.After wherein steam turbine different parameters draws gas and enters heaters at different levels, the hydrophobic mode taking to flow automatically step by step.
Described steam ejector 17, is drawn gas by four sections of injections six sections that draw gas, and wherein four sections of extraction flows are controlled by control valve 21, and six sections of extraction flows are controlled by control valve 22；Steam ejector 24 is drawn gas by reheated steam injection four sections, and wherein reheated steam flow is controlled by control valve 20, and four sections are drawn gas and controlled by control valve 23.Steam ejector mixed low parameter steam enters little steam turbine 19 through blender 18 and does work, and little steam turbine 19 is coaxially connected with feed pump 13, and little steam turbine 19 steam discharge enters condenser 7.
In simple terms, unit, when heavy-duty service, enables steam ejector 17 to its work process, disables steam ejector 24；Unit, when underrun, enables steam ejector 24, disables steam ejector 17.By controlling to specify two extraction control valves of steam ejector, regulate source of the gas parameter, while ensureing that little steam turbine safety and steady runs, make mixed parameter of drawing gas the lowest.
Described unit is when declared working condition 600MW is run, control valve 20 and control valve 23 are closed mode, by adjusting control valve 21 with control valve 22 with four sections of (1.02MPa that draw gas, 361.09 DEG C) six sections of (0.24MPa that draw gas of injection, 196.09 DEG C), mixed steam parameter draws gas lower compared with four sections, preferably make use of power plant's tow taste heat；When unit load is reduced to a certain degree, four sections are drawn gas and cannot meet the requirement of little steam turbine, control valve 20 is opened with control valve 23, simultaneously close off control valve 21 and control valve 22, drawn gas with reheated steam injection four sections with control valve 23 by adjusting control valve 20, along with the reduction of load, gradually open big control valve 20, turn control valve 23 down, to ensure that thermal source mates with little steam turbine.
Claims (3)
1. one kind utilizes the electricity generation system that injector regulation source of the gas drives the little steam turbine of feed pump, it is characterised in that boiler (1), high pressure cylinder (2), intermediate pressure cylinder (3), left side low pressure (LP) cylinder (4), right side low pressure (LP) cylinder (5), electromotor (6) are sequentially connected with；Left side low pressure (LP) cylinder (4), right side low pressure (LP) cylinder (5) steam discharge are connected with condensate pump (8) through condenser (7)；Condense water according to-secondary pass through the 7th grade of low-pressure heater (9), the 6th grade of low-pressure heater (10) is connected with oxygen-eliminating device (12) with level V low-pressure heater (11)；Oxygen-eliminating device (12) water outlet, after feed pump (13) pressurizes, flows successively through third level high-pressure heater (14), second level high-pressure heater (15), first order high-pressure heater (16), and final and boiler (1) is connected to form closed circuit；Reheated steam is connected with steam ejector (24) by control valve (20), and four sections are drawn gas and are connected with steam ejector (24) by control valve (23)；Four sections are drawn gas and are connected with steam ejector (17) by control valve (21), and six sections are drawn gas and are connected with steam ejector (17) by control valve (22)；Steam ejector (17) is all connected with blender (18) with steam ejector (24)；Blender (18) outlet vapor is connected with condenser through too small steam turbine (19).
2. a kind of electricity generation system utilizing injector regulation source of the gas to drive the little steam turbine of feed pump described in claim 1, it is characterized in that, steam ejector (17) is drawn gas by four sections of injections six sections that draw gas, wherein four sections of extraction flows are controlled by control valve (21), six sections of extraction flows are controlled by control valve (22), and mass ratio of induced-to-inducing air specifically can be chosen according to the unit pressure after parameter and mixing that draws gas；Steam ejector (24) is drawn gas by reheated steam injection four sections, and wherein reheated steam flow is controlled by control valve (20), and four sections are drawn gas and controlled by control valve (23), and mass ratio of induced-to-inducing air specifically can be chosen according to the unit pressure after parameter and mixing that draws gas.
3. a kind of electricity generation system utilizing injector regulation source of the gas to drive the little steam turbine of feed pump described in claim 1, it is characterised in that unit is when heavy-duty service, closing control valve (20,23), opening controlling valve (21,22) four sections, are made to draw gas as little steam turbine (19) vapour source with six sections；Unit when underrun, gradually opening controlling valve (20,23), progressively close off control valve (21,22), make reheated steam with four sections draw gas as little steam turbine (19) vapour source.
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| CN201620198813.0U CN205477782U (en) | 2016-03-16 | 2016-03-16 | Utilize ejector to adjust power generation system of little steam turbine of air supply drive water -feeding pump |
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| CN201620198813.0U CN205477782U (en) | 2016-03-16 | 2016-03-16 | Utilize ejector to adjust power generation system of little steam turbine of air supply drive water -feeding pump |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108087049A (en) * | 2017-12-31 | 2018-05-29 | 联合瑞升（北京）科技有限公司 | A kind of industry steam-supplying system |
| CN108488872A (en) * | 2018-03-28 | 2018-09-04 | 程琛 | A kind of low-quality steam heating system applied to wet type cooling unit |
| CN111206970A (en) * | 2018-11-21 | 2020-05-29 | 赫普科技发展（北京）有限公司 | Peak regulation system and control method for steam-injection steam extractor of thermal power plant |
| CN113464225A (en) * | 2021-07-05 | 2021-10-01 | 西安交通大学 | System and method for wide load operation of power plant with two-stage steam ejector |
| CN113623034A (en) * | 2021-08-17 | 2021-11-09 | 西安交通大学 | Thermoelectric decoupling system with two-stage steam ejector and operation method |
| CN114234264A (en) * | 2021-12-15 | 2022-03-25 | 北京航空航天大学宁波创新研究院 | Thermoelectric cooperative system coupled with steam ejector and operation method |
| CN114738059A (en) * | 2022-04-27 | 2022-07-12 | 西安热工研究院有限公司 | Heat supply network circulating water pump steam turbine system of high back pressure heat supply unit and driving method |
| CN114837757A (en) * | 2022-05-27 | 2022-08-02 | 华能国际电力股份有限公司 | Thermal power plant high-pressure feed water bypass frequency modulation system with steam ejector and working method |
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2016
- 2016-03-16 CN CN201620198813.0U patent/CN205477782U/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108087049A (en) * | 2017-12-31 | 2018-05-29 | 联合瑞升（北京）科技有限公司 | A kind of industry steam-supplying system |
| CN108488872A (en) * | 2018-03-28 | 2018-09-04 | 程琛 | A kind of low-quality steam heating system applied to wet type cooling unit |
| CN108488872B (en) * | 2018-03-28 | 2024-03-01 | 程琛 | Low-quality steam heating system applied to wet cooling unit |
| CN111206970A (en) * | 2018-11-21 | 2020-05-29 | 赫普科技发展（北京）有限公司 | Peak regulation system and control method for steam-injection steam extractor of thermal power plant |
| CN111206970B (en) * | 2018-11-21 | 2024-03-01 | 赫普科技发展（北京）有限公司 | Peak regulating system utilizing steam jet and steam extractor in thermal power plant and control method |
| CN113464225A (en) * | 2021-07-05 | 2021-10-01 | 西安交通大学 | System and method for wide load operation of power plant with two-stage steam ejector |
| CN113623034A (en) * | 2021-08-17 | 2021-11-09 | 西安交通大学 | Thermoelectric decoupling system with two-stage steam ejector and operation method |
| CN114234264A (en) * | 2021-12-15 | 2022-03-25 | 北京航空航天大学宁波创新研究院 | Thermoelectric cooperative system coupled with steam ejector and operation method |
| CN114234264B (en) * | 2021-12-15 | 2023-01-06 | 北京航空航天大学宁波创新研究院 | Thermoelectric cooperative system coupled with steam ejector and operation method |
| CN114738059A (en) * | 2022-04-27 | 2022-07-12 | 西安热工研究院有限公司 | Heat supply network circulating water pump steam turbine system of high back pressure heat supply unit and driving method |
| CN114837757A (en) * | 2022-05-27 | 2022-08-02 | 华能国际电力股份有限公司 | Thermal power plant high-pressure feed water bypass frequency modulation system with steam ejector and working method |
| CN114837757B (en) * | 2022-05-27 | 2023-05-05 | 华能国际电力股份有限公司 | High-water-adding bypass frequency modulation system of thermal power plant provided with steam ejector and working method |
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