CN205618210U - Adjust power generation system in little steam turbine vapour source of steam -operating draught fan - Google Patents
Adjust power generation system in little steam turbine vapour source of steam -operating draught fan Download PDFInfo
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- CN205618210U CN205618210U CN201620195211.XU CN201620195211U CN205618210U CN 205618210 U CN205618210 U CN 205618210U CN 201620195211 U CN201620195211 U CN 201620195211U CN 205618210 U CN205618210 U CN 205618210U
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Abstract
The utility model discloses an adjust power generation system in little steam turbine vapour source of steam -operating draught fan who belongs to the power station energy -saving field. This system mainly comprises parts such as boiler, steam turbine, condenser, regenerator, generator, control valve, steam ejector, blender, little steam turbine, draught fans. During unit operate in a variable working condition, satisfy the steam of the optimal parameter of the economic nature of unit as the admission of little steam turbine through steam ejector extraction from the host computer, the steam acting of expanding in little steam turbine, little steam turbine passes through constant speed gear box coaxial drive draught fan. The utility model discloses according to the change of unit load, draw high -pressure steam through the steam ejector and penetrate low pressure steam, steam after mixing makes little steam turbine possess best vapour source as the admission of little steam turbine, 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 regulating steam-driven induced draft fan little steam turbine vapour source.
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.Send in thermal power plant, air-introduced machine is primary power consumption rich and influential family, and its power consumption accounts for more than the 2% of gross generation, accounts for about the 30% of station service.And air-introduced machine is as thermal power plant one of current consuming apparatus, along with the increase of unit capacity, id-motor capacity is also significantly increased.Therefore, its operating condition is the emphasis link reducing station service power consumption rate, optimizes the method for operation of air-introduced machine, and after the most electronic air-introduced machine changes steam-driven induced draft fan, the selection in steam-driven induced draft fan little steam turbine vapour source has important practice significance.
Current unit commonly used four sections of vapour sources drawn gas as little steam turbine when high load capacity, use reheated steam to draw gas when underload, and even main steam is drawn gas the vapour source as little steam turbine.This can cause under same load, and parameter of drawing gas is of a relatively high, and when unit load changes, vapour source switching of drawing gas is discontinuous, causes the problems such as part high-grade energy loss.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 unit 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.
Utility model content
When the purpose of this utility model is for current Power Plant heavy-duty service, commonly used four sections of drive little steam turbines of steam-driven induced draft fan that draw gas；During underrun, use reheated steam draw gas even main steam drive the little steam turbine of steam-driven induced draft fan.Cause the problems such as part high-grade energy loss, unit net coal consumption rate are higher；Now propose a kind of vapour source regulating the little steam turbine of steam-driven induced draft fan and can adapt to the electricity generation system of the requirement of small turbine drive air-introduced machine when variable working condition, the ladder adequately and reasonably realizing energy utilizes, thus reduce the station service power consumption rate of unit, improve unit thermal efficiency of cycle, reduce coa consumption rate.
For reaching above-mentioned purpose, this utility model have employed techniques below scheme.
A kind of electricity generation system regulating steam-driven induced draft fan little steam turbine vapour source, this system mainly includes boiler, steam turbine, Air-Cooling Island, regenerator, electromotor, control valve, steam ejector, blender, little steam turbine, air-introduced machine etc..It is characterized in that, boiler 1, high pressure cylinder 2, intermediate pressure cylinder 3, low pressure (LP) cylinder 4, electromotor 5 are in series；Low pressure (LP) cylinder 4 steam discharge enters condensate pump 7 through Air-Cooling Island 6；Condensation water passes sequentially through 8, No. six low-pressure heaters 9 of No. seven low-pressure heaters and No. five low-pressure heaters 10 enter oxygen-eliminating device 11；Oxygen-eliminating device 11 water outlet, after feed pump 12 pressurizes, flows successively through No. three high-pressure heaters 14, high-pressure heater 15 of 13, No. two high-pressure heaters, eventually enters into boiler 1 and form closed circuit；Cold section of reheated steam is connected with No. I steam ejector (19) by the first control valve (16), and four sections are drawn gas and are connected with No. I steam ejector (19) by the 3rd control valve (18)；Four sections are drawn gas and are connected with No. II steam ejector (21) by the second control valve (17), and five sections are drawn gas and are connected with No. II steam ejector (21) by the 4th control valve (20)；No. I steam ejector (19) is all connected with blender (22) with No. II steam ejector (21)；Blender (22) outlet vapor is connected with Air-Cooling Island through too small steam turbine (23)；Little steam turbine (23) is coaxially connected with air-introduced machine (25) by constant speed gear-box (24).
No. II described steam ejector 21, is drawn gas by four sections of injections five sections that draw gas, and wherein four sections of extraction flows are controlled by the second control valve 17, and five sections of extraction flows are controlled by the 4th control valve 20；No. I steam ejector 19 leads to super cooled sect reheated steam injection four sections and draws gas, and the coldest section of reheated steam flow is controlled by the first control valve 16, and four sections of extraction flows are controlled by the 3rd control valve 18.Steam ejector mixed low parameter steam enters little steam turbine 23 expansion work through blender 22, and little steam turbine 23 and air-introduced machine 25 are coaxially connected by constant speed gear-box 24, and little steam turbine 23 steam discharge enters Air-Cooling Island 6.
Described unit is when declared working condition 600MW is run, first control valve 16 and the 3rd control valve 18 are closed mode, by regulating the second control valve 17 and the 4th control valve 20 with four sections of (1.02MPa that draw gas, 361.09 DEG C) injection five sections draws gas (0.615 MPa, 302.5 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, first control valve 16 is opened with the 3rd control valve 18, simultaneously close off the second control valve 17 and the 4th control valve 20, draw gas with cold section of reheated steam injection four sections with the 3rd control valve 18, along with the reduction of load by regulating the first control valve 16, gradually open big first control valve 16, turn the 3rd control valve 18 down, to ensure that vapour source is mated with little steam turbine, meet air-introduced machine requirements of one's work.
Accompanying drawing explanation
Fig. 1 is a kind of electricity generation system regulating steam-driven induced draft fan little steam turbine vapour source.
In figure: 1-boiler；2-high pressure cylinder；3-intermediate pressure cylinder；4-low pressure (LP) cylinder；5-electromotor；6-Air-Cooling Island；7-condensate pump；8-No. seven low-pressure regenerators；9-No. six low-pressure regenerators；10-No. five low-pressure regenerators；11-oxygen-eliminating device；12-feed pump；13-No. three high-pressure extraction devices；14-No. two high-pressure extraction devices；15-numbers high-pressure extraction devices；16-the first control valves；17-the second control valves；18-the three control valves；19-No. I steam ejectors；20-the four control valves；21-No. II steam ejectors；22-blender；23-little steam turbine；24-constant speed gear-box；25-air-introduced machine.
Detailed description of the invention
During utility model works, mix two strands by injector to draw gas, relative reduction draws gas parameter, drive the acting of air-introduced machine little steam turbine, preferably utilize low grade heat energy, increase unit entirety cycle efficieny, reduce unit station service power consumption rate, reduce net coal consumption rate, below in conjunction with the accompanying drawings this utility model embodiment is described further.
Fig. 1 is a kind of electricity generation system regulating steam-driven induced draft fan little steam turbine vapour source.
A kind of electricity generation system regulating steam-driven induced draft fan little steam turbine vapour source, this system mainly includes boiler, steam turbine, condenser, regenerator, electromotor, control valve, steam ejector, blender, little steam turbine, air-introduced machine etc..It is characterized in that, boiler 1, high pressure cylinder 2, intermediate pressure cylinder 3, low pressure (LP) cylinder 4, electromotor 5 are in series；Low pressure (LP) cylinder 4 steam discharge enters condensate pump 7 through Air-Cooling Island 6；Condensation water passes sequentially through 8, No. six low-pressure heaters 9 of No. seven low-pressure heaters and No. five low-pressure heaters 10 enter oxygen-eliminating device 11；Oxygen-eliminating device 11 water outlet, after feed pump 12 pressurizes, flows successively through No. three high-pressure heaters 14, high-pressure heater 15 of 13, No. two high-pressure heaters, eventually enters into boiler 1 and form closed circuit；Cold section of reheated steam is connected with No. I steam ejector (19) by the first control valve (16), and four sections are drawn gas and are connected with No. I steam ejector (19) by the 3rd control valve (18)；Four sections are drawn gas and are connected with No. II steam ejector (21) by the second control valve (17), and five sections are drawn gas and are connected with No. II steam ejector (21) by the 4th control valve (20)；No. I steam ejector (19) is all connected with blender (22) with No. II steam ejector (21)；Blender (22) outlet vapor is connected with Air-Cooling Island through too small steam turbine (23)；Little steam turbine (23) is coaxially connected with air-introduced machine (25) by constant speed gear-box (24).
No. II described steam ejector 21, is drawn gas by four sections of injections five sections that draw gas, and wherein four sections of extraction flows are controlled by the second control valve 17, and five sections of extraction flows are controlled by the 4th control valve 20；No. I steam ejector 19 leads to super cooled sect reheated steam injection four sections and draws gas, and the coldest section of reheated steam flow is controlled by the first control valve 16, and four sections of extraction flows are controlled by the 3rd control valve 18.Steam ejector mixed low parameter steam enters little steam turbine 23 through blender 22 and does work, and little steam turbine 23 and air-introduced machine 25 are coaxially connected by constant speed gear-box 24, and little steam turbine 23 steam discharge enters Air-Cooling Island 6.
Its work process is in simple terms, unit is when heavy-duty service, close the first control valve (16) and the 3rd control valve (18), open the second control valve (17) and the 4th control valve (20), make four sections to draw gas by No. II mixed steam of steam ejector (21) as little steam turbine (23) vapour source with five sections；Unit is when underrun, gradually open the first control valve (16) and the 3rd control valve (18), progressively close off the second control valve (17) and the 4th control valve (20), make cold section of reheated steam draw gas by No. I mixed steam of steam ejector (19) as little steam turbine (23) vapour source with four sections.By controlling to specify two extraction control valves of steam ejector, regulating vapour source dates, while ensureing that air-introduced machine safety and steady runs, the steam inlet condition making mixed little steam turbine is the lowest.
Described unit is when declared working condition 600MW is run, first control valve 16 and the 3rd control valve 18 are closed mode, by regulating the second control valve 17 and the 4th control valve 20 with four sections of (1.02MPa that draw gas, 361.09 DEG C) five sections of (0.615MPa that draw gas of injection, 302.5 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, first control valve 16 is opened with the 3rd control valve 18, simultaneously close off the second control valve 17 and the 4th control valve 20, draw gas with cold section of reheated steam injection four sections with the 3rd control valve 18, along with the reduction of load by regulating the first control valve 16, gradually open big first control valve 16, turn the 3rd control valve 18 down, to ensure that vapour source is mated with little steam turbine, meet the job demand of air-introduced machine.
Claims (3)
1. the electricity generation system regulating steam-driven induced draft fan little steam turbine vapour source, it is characterised in that boiler (1), high pressure cylinder (2), intermediate pressure cylinder (3), low pressure (LP) cylinder (4), electromotor (5) are sequentially connected with；Low pressure (LP) cylinder (4) steam discharge is connected with condensate pump (7) through Air-Cooling Island (6)；Water passes sequentially through No. seven low-pressure heaters (8), No. six low-pressure heaters (9) are connected with oxygen-eliminating device (11) with No. five low-pressure heaters (10) in condensation；Oxygen-eliminating device (11) water outlet, after feed pump (12) pressurizes, flows successively through No. three high-pressure heaters (13), No. two high-pressure heaters (14), high-pressure heaters (15), and final and boiler (1) is connected to form closed circuit；Cold section of reheated steam is connected with No. I steam ejector (19) by the first control valve (16), and four sections are drawn gas and are connected with No. I steam ejector (19) by the 3rd control valve (18)；Four sections are drawn gas and are connected with No. II steam ejector (21) by the second control valve (17), and five sections are drawn gas and are connected with No. II steam ejector (21) by the 4th control valve (20)；No. I steam ejector (19) is all connected with blender (22) with No. II steam ejector (21)；Blender (22) outlet vapor is connected with Air-Cooling Island through too small steam turbine (23)；Little steam turbine (23) is coaxially connected with air-introduced machine (25) by constant speed gear-box (24).
A kind of electricity generation system regulating steam-driven induced draft fan little steam turbine vapour source, it is characterized in that, No. I logical super cooled sect reheated steam injection four sections of steam ejector (19) draws gas, the coldest section of reheated steam flow is controlled by the first control valve (16), and four sections of extraction flows are controlled by the 3rd control valve (18)；No. II steam ejector (21) is drawn gas by four sections of injections five sections that draw gas, and wherein four sections of extraction flows are controlled by the second control valve (17), and five sections of extraction flows are controlled by the 4th control valve (20).
A kind of electricity generation system regulating steam-driven induced draft fan little steam turbine vapour source, it is characterized in that, unit is when heavy-duty service, close the first control valve (16) and the 3rd control valve (18), open the second control valve (17) and the 4th control valve (20), make four sections to draw gas by No. II mixed steam of steam ejector (21) as little steam turbine (23) vapour source with five sections；Unit is when underrun, gradually open the first control valve (16) and the 3rd control valve (18), progressively close off the second control valve (17) and the 4th control valve (20), make cold section of reheated steam draw gas by No. I mixed steam of steam ejector (19) as little steam turbine (23) vapour source with four sections.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620195211.XU CN205618210U (en) | 2016-03-15 | 2016-03-15 | Adjust power generation system in little steam turbine vapour source of steam -operating draught fan |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620195211.XU CN205618210U (en) | 2016-03-15 | 2016-03-15 | Adjust power generation system in little steam turbine vapour source of steam -operating draught fan |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
-
2016
- 2016-03-15 CN CN201620195211.XU patent/CN205618210U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161005 Termination date: 20180315 |
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| CF01 | Termination of patent right due to non-payment of annual fee |