CN1793617A - Multi-grade using backheating drain residual heat generator of thermal power generator set - Google Patents
Multi-grade using backheating drain residual heat generator of thermal power generator set Download PDFInfo
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- CN1793617A CN1793617A CNA2005101121396A CN200510112139A CN1793617A CN 1793617 A CN1793617 A CN 1793617A CN A2005101121396 A CNA2005101121396 A CN A2005101121396A CN 200510112139 A CN200510112139 A CN 200510112139A CN 1793617 A CN1793617 A CN 1793617A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention discloses an electricity generating device using multistage regenerative heat and remaining heat by thermal power machine set, comprising routing main steam turbine generator system and routine regenerative system and its characters lie in adding pressure reducing expanding container, steam jet, low pressure turbine, and small generator, etc., combining the steam jet and the pressure reducing expanding container to produce low pressure steam to drive the low pressure turbine, using drainage variable phase heat release of the regenerative system to produce low pressure steam, converting the low pressure steam heat energy into mechanical energy, converting the mechanical energy into electric energy through the small generator, and the lower pressure steam produced by drainage variable phase heat release can also serve as auxiliary steam source for heat users inside and outside power plant to feed heat to the users, and the working medium can return to the regenerative system, somewhat improving thermodynamic property of the regenerative system. It is an energy-saving, efficiency-raising measure.
Description
Invention field
The invention belongs to thermal power generation system technical field in the Thermal Power Engineering, it relates to the multistage backheat drain residual heat device that utilizes of a kind of fired power generating unit.
Background technique
China's power industry is after the system that realizes " separate the factory and network, economize be entity " changes, and power industry obtains significant progress.Thermal power plant also is a big power consumer as the main place of primary energy and secondary energy conversion, and this just needs to strengthen power plant's management, reduces the generating energy consumption.In energy saving for power plants consumption reduction engineering, thermodynamic system is the importance that has energy-saving potential to dig.From energy-conservation practice and theoretical developments, secondly the technology integrity of paying attention to steam turbine is boiler at first, yet the energy-saving potential of exploration thermodynamic system relatively lags behind.With a 300MW fired power generating unit is example, and the bleeder heater group per hour has nearly 300 tons hydrophobicly to produce nearly 30 tons of the steam that is used for the low-pressure turbine work done approximately, but in existing thermal power generation installation, these working medium have circulation of one's own, untapped its potential.
Summary of the invention
The objective of the invention is energy-saving potential, provide a kind of fired power generating unit the multistage backheat drain residual heat device that utilizes for the thermodynamic system of developing existing thermal power generation installation.
Technological scheme of the present invention is, the multistage backheat drain residual heat device that utilizes of a kind of fired power generating unit, it comprises by boiler, high-pressure cylinder, intermediate pressure cylinder, low pressure (LP) cylinder, main vapour condenser, the main steam turbine power generation system of the routine that generator is formed and by condensate pump, gland heater, low-pressure heater, high-pressure heater, the deaerator feedwater case, the heat regenerative system of the routine that equipment such as high pressure water pump are formed, and from main steam turbine at different levels draw gas enter respectively corresponding at different levels high, the low-pressure heater heat release also condenses into hydrophobic, it is characterized in that, the hydrophobic lower floor that enters the step-down development unit through drain regulating valve after multistage high-pressure heater heating, the hydrophobic middle level that enters the step-down development unit through drain regulating valve through multistage low-pressure heater heating, step-down development unit vapour side steam through separating valve by the steam jet ejector injection, send into the low-pressure turbine work done by separating valve again, exhaust steam enters little vapour condenser, and returns through steam equalizing pipe valve and water budget tube valve and to become owner of vapour condenser and reclaim working medium; Step-down development unit water side working medium is got back to main vapour condenser through the control of development unit drain regulating valve and is entered major cycle, finish the conversion of hydrophobic waste heat of backheat and mechanical energy thus, finish the conversion of mechanical energy and electric energy then by the small generators that is connected with low-pressure turbine, realize the function of the multistage utilization generating of the hydrophobic waste heat of fired power generating unit backheat.
Described step-down development unit vapour side steam,,, is boosted by condensate pump and gets back to main vapour condenser through user's recovery tank by direct hot user's steam supply inside and outside factory also behind the separating valve by steam jet ejector through separating valve.
The invention has the beneficial effects as follows: the present invention is according to Thermal Power Station's principle, utilize the hydrophobic phase transformation heat release of heat regenerative system to produce low pressure steam, by low-pressure turbine low pressure steam heat energy is changed into mechanical energy, by small generators mechanical energy is converted into electric energy, simultaneously reclaim working medium again and enter the main frame heat regenerative system, and low pressure steam also can be used as the inside and outside hot user's of factory auxiliary vapour source, and the thermomechanics degree of perfection of main frame heat regenerative system is also increased.With a 300MW fired power generating unit is example, the bleeder heater group per hour has nearly 300 tons of hydrophobic nearly 30 tons of steam that are used for the low-pressure turbine work done of producing approximately, adopt the multistage backheat drain residual heat device that utilizes of a kind of fired power generating unit of the present invention, have a net increase of about the about 1000KW of generated output, by unit annual mean about 7000h working time, if this factory's electricity price is by 0.60 yuan/(kWh) calculation of price, only this item, a 300MW fired power generating unit can bring net profit more than more than 400 ten thousand yuan the every year, construction investment with regard to recyclable electricity generating device in general 1～2 year, the present invention are that a unit that need not to increase the fuel input improves the energy efficiency measure of exerting oneself.Though the total electric motor power of China at present is above 4.5 hundred million kilowatts, the general character place of fired power generating unit thermodynamic system in addition, therefore the inventive method exploitation thermal power generation unit energy-saving potential is huge, application prospect is very wide, has also opened up new market for manufacturing industry further develops later in the electric power relative saturation.
Description of drawings
Fig. 1 is the multistage backheat drain residual heat apparatus system schematic diagram that utilizes of a kind of fired power generating unit.
Embodiment
Fig. 1 has represented electricity generating device principled thermal system of the present invention.Illustrated system joins together circulation of fired power generating unit backheat and the multistage backheat drain residual heat device thermodynamic system of utilizing, and wherein steam jet ejector and step-down development unit are united the low pressure steam that drives low-pressure turbine in order to produce.System shown in Figure 1 comprises the boiler 1 of a resuperheat of steam of a fired power generating unit, produce fresh steam and enter steam turbine high-pressure cylinder 2 works done, the secondary steam of high-pressure cylinder steam discharge after boiler is warm again enters Steam Turbine Through IP Admission 3 works done, after turbine low pressure cylinder 4 works done, enter main vapour condenser 17 then, finish the conversion of heat energy and mechanical energy, finish the conversion of mechanical energy and electric energy then by generator 5.After the water of condensation of main steam turbine steam discharge is boosted by condensate pump 18, through gland heater 13, and enter No. four low-pressure heaters 12, No. three low-pressure heaters 11, No. two low-pressure heaters 10 and a low-pressure heater 9 successively and absorb heats, enter the oxygen-eliminating device deoxygenation at last and arrive feed tank 14 later on.Feedwater in the feed tank is boosted by high pressure water pump 16 and is sent to No. three high-pressure heaters 8, No. two high-pressure heaters 7 and a high-pressure heater 6 successively and absorbs heats, after the boiler feed water operating table enters boiler 1, finishes the working medium circulation.High pressure water pump has small turbine 15 to drive, and draws gas from No. four of main steam turbine in its vapour source, and the steam discharge after the work done enters main vapour condenser.By among the embodiment shown in Figure 1 as can be seen, enter the heat release of corresponding high and low pressure heater at different levels respectively and condense into hydrophobic from different levels the drawing gas of main steam turbine; The present invention is on the basis of above-mentioned conventional thermoelectricity main steam turbine power generation system and conventional fired power generating unit heat regenerative system, characteristics are, set up the step-down development unit, steam jet ejector, low-pressure turbine, small generators etc., steam jet ejector and step-down development unit are united the low pressure steam that drives low-pressure turbine in order to produce, enter No. two high-pressure heaters and No. three high-pressure heaters after drain regulating valve 27 enters the lower floor of step-down development unit 30 in the hydrophobic gravity flow successively of a high-pressure heater of above-mentioned conventional fired power generating unit heat regenerative system, the hydrophobic gravity flow successively of a low-pressure heater enters No. two low-pressure heaters and No. three low-pressure heaters after drain regulating valve 29 enters the middle level of step-down development unit, step-down development unit vapour side steam through separating valve 25 by steam jet ejector 19, introduce low-pressure turbine 32 works done by separating valve 24, exhaust steam enters little vapour condenser 34, and becomes owner of vapour condenser recovery working medium for 36 times through steam equalizing pipe valve 35 and water budget tube valve; Step-down development unit water side working medium is got back to main vapour condenser through the control of development unit drain regulating valve 31 and is entered major cycle, finish the conversion of hydrophobic waste heat of backheat and mechanical energy thus, finish the conversion of mechanical energy and electric energy then by small generators 33, realize the function of the multistage utilization generating of the hydrophobic waste heat of fired power generating unit backheat.
By shown in Figure 1, described step-down development unit 30 vapour side steam through separating valve 25 by from being the steam jet ejector 19 of power by modulating valve 22 through 4 grades of regenerative steams of separating valve 21 or through the initial steam of separating valve 20, behind separating valve 24, pass through separating valve 37 hot user's 38 steam supplies inside and outside factory again, through user's recovery tank 39, boost by small pump 40 then and get back to main vapour condenser 17.This make the present invention can (or single-row) when realizing the multistage utilization generating of the hydrophobic waste heat of fired power generating unit backheat as factory inside and outside hot user's auxiliary vapour source, the thermomechanics degree of perfection of main frame heat regenerative system is also increased.Described electricity generating device design is after the normal operation of main frame, the step-down development unit that slowly stably puts into operation, and regulate the steam inlet condition that the steam flow of introducing steam jet ejector reaches this low-pressure turbine of control by vapor pressure and temperature feedback signal regulating and controlling valve 22 from the low-pressure turbine inlet.
According to the present invention, described electricity generating device also is equipped with separation valve door 20, separation valve door 21, separation valve door 23, separation valve door 24, separation valve door 25, separation valve door 26, separation valve door 28, and annex such as separation valve door 37, provide electricity generating device to realize the switching condition of the multiple method of operation; The multistage as required backheat drain residual heat device that utilizes also can be out of service, and fired power generating unit bleeder heater draining system recovers the former method of operation.
When described electricity generating device obtained to have a net increase of generated output, because the change of hydrophobic Placement and station-service auxiliary steam, main frame backheat circuit thermomechanics integrity improved, and directly improves main frame heat regenerative system heat-economy.The hydrophobic waste heat of this fired power generating unit backheat is multistage to utilize the cycle fluid of electricity generating device still to import the backheat circulation of fired power generating unit, does not increase the task of host computer system amount of makeup water.
Above said content only is the basic explanation of the present invention under conceiving, and according to any equivalent transformation that technological scheme of the present invention is done, all should belong to protection scope of the present invention.
Claims (2)
1, the multistage backheat drain residual heat device that utilizes of a kind of fired power generating unit, it is by boiler (1), high-pressure cylinder (2), intermediate pressure cylinder (3), low pressure (LP) cylinder (4), main vapour condenser (17), the main steam turbine power generation system that generator (5) is formed and by condensate pump (18), gland heater (13), low-pressure heater (9,10,11,12), high-pressure heater (6,7,8), feed tank (14), high pressure water pump (16), the heat regenerative system that small turbine (15) is formed is formed, from main steam turbine at different levels draw gas enter respectively corresponding at different levels high, the low-pressure heater heat release also condenses into hydrophobic, it is characterized in that, the hydrophobic lower floor that enters step-down development unit (30) through drain regulating valve (27) after the heating of multistage high-pressure heater, the hydrophobic middle level that enters the step-down development unit through drain regulating valve (29) through multistage low-pressure heater heating, step-down development unit (30) vapour side steam through separating valve (25) by steam jet ejector (19), introduce low-pressure turbine (32) work done by separating valve (24), exhaust steam enters little vapour condenser (34), and returns through steam equalizing pipe valve (35) and water budget tube valve (36) and to become owner of vapour condenser (17) recovery working medium; Step-down development unit (30) water side working medium is got back to main vapour condenser (17) through the control of development unit drain regulating valve (31) and is entered major cycle, finish the conversion of hydrophobic waste heat of backheat and mechanical energy thus, finish the conversion of mechanical energy and electric energy then by the small generators (33) that is connected with low-pressure turbine (32), realize the function of the multistage utilization generating of the hydrophobic waste heat of fired power generating unit backheat.
2, the multistage backheat drain residual heat device that utilizes of a kind of fired power generating unit according to claim 1, it is characterized in that, described step-down development unit (30) vapour side steam through separating valve (25) by from being the steam jet ejector (19) of power by modulating valve (22) through 4 grades of regenerative steams of separating valve (21) or through the initial steam of separating valve (20), behind separating valve (24), pass through separating valve (37) hot user (38) steam supply inside and outside factory again, through user's recovery tank (39), boost by small pump (40) then and get back to main vapour condenser (17).
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2005101121396A CN100354504C (en) | 2005-12-28 | 2005-12-28 | Multi-grade using backheating drain residual heat generator of thermal power generator set |
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| CNB2005101121396A CN100354504C (en) | 2005-12-28 | 2005-12-28 | Multi-grade using backheating drain residual heat generator of thermal power generator set |
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| CN1793617A true CN1793617A (en) | 2006-06-28 |
| CN100354504C CN100354504C (en) | 2007-12-12 |
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| CNB2005101121396A Expired - Fee Related CN100354504C (en) | 2005-12-28 | 2005-12-28 | Multi-grade using backheating drain residual heat generator of thermal power generator set |
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| CN101294502B (en) * | 2007-04-23 | 2010-12-08 | 张庆玉 | Multifunctional vacuum firepower waterpower dual-power generation and water-lifting water distributing station |
| CN102011616A (en) * | 2010-11-22 | 2011-04-13 | 山东泓奥电力科技有限公司 | High-flow, low-parameter and high-backpressure expansion power energy-saving system |
| CN102305107A (en) * | 2011-09-20 | 2012-01-04 | 河北省电力建设调整试验所 | Turboset heat rate online monitoring device and method based on cold side heat loss |
| CN102678194A (en) * | 2011-03-18 | 2012-09-19 | 中国电力工程顾问集团华东电力设计院 | Secondary reheating steam turbine generator unit system provided with overheating steam feed water heater |
| CN102678207A (en) * | 2011-03-18 | 2012-09-19 | 中国电力工程顾问集团华东电力设计院 | Thermodynamic system with twice reheating |
| CN102720551A (en) * | 2012-07-02 | 2012-10-10 | 上海汽轮机厂有限公司 | Control method for steam thermal system with dual-machine backheating steam extraction |
| CN102720550A (en) * | 2012-07-02 | 2012-10-10 | 上海汽轮机厂有限公司 | Dual-machine regenerative steam extraction steam thermodynamic system |
| CN101638998B (en) * | 2009-09-07 | 2012-12-26 | 上海电力学院 | Front-end double pressure heat absorbing and heat returning circulating thermal system for thermal generator set |
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| CN107270275A (en) * | 2017-07-21 | 2017-10-20 | 袁雄俊 | A kind of energy-saving flash vessel disappears white system |
| CN108050506A (en) * | 2018-01-22 | 2018-05-18 | 程琛 | It is a kind of to improve low during thermal power plant unit peak regulation plus leaving water temperature device |
| CN112879117A (en) * | 2021-03-16 | 2021-06-01 | 中国华能集团清洁能源技术研究院有限公司 | System and method for recycling waste heat of fixed continuous exhaust of thermal power plant by using hot press |
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| CN100354504C (en) | 2007-12-12 |
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