CN102425781A - Efficient thermodynamic system used for reheating unit - Google Patents
Efficient thermodynamic system used for reheating unit Download PDFInfo
- Publication number
- CN102425781A CN102425781A CN2011102124541A CN201110212454A CN102425781A CN 102425781 A CN102425781 A CN 102425781A CN 2011102124541 A CN2011102124541 A CN 2011102124541A CN 201110212454 A CN201110212454 A CN 201110212454A CN 102425781 A CN102425781 A CN 102425781A
- Authority
- CN
- China
- Prior art keywords
- steam turbine
- steam
- unit
- backheat
- pressure cylinder
- 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.)
- Pending
Links
Images
Landscapes
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention provides an efficient thermodynamic system used for a reheating unit. The efficient thermodynamic system is characterized in that a backheating steam turbine connected with a high pressure cylinder is arranged behind the high pressure cylinder of the thermodynamic system; and the extraction steam pipeline and the exhaust steam pipeline of the backheating steam turbine are respectively communicated with a high pressure heater and a deaerator. According to the scheme of the thermodynamic system provided by the invention, the backheating steam turbine is arranged behind the high pressure cylinder of the unit, and the extraction steam and the exhaust steam of the steam turbine are utilized to replace the extraction steam of a plurality of reheating hot sections, thus the influence of reheating on backheating can be reduced and the heat economical efficiency of the unit can be improved. By utilizing the system provided by the invention, the plant thermal efficiency of a large-scale thermal power generating unit is relatively improved by 0.3%, and the coal consumption rate is reduced by about o.7g/kWh.
Description
Technical field
The invention belongs to therrmodynamic system, be specifically related to a kind of efficient therrmodynamic system and method for designing thereof that is used for again hot unit.
Background technology
Modern large electric power plant unit generally adopts heat and backheat again; Yet the capacity of fired power generating unit is big, parameter is increasingly high; Adopt again heat and backheat to improve its heat-economy; As far as hot backheat unit again, its again the regenerative steam after the heat have higher temperature, can increase irreversible loss in the bleeder heater, weaken the effect of backheat.From the angle of energy utilization, make again the origin of heat that it is overheated that hot arc draws gas in boiler, have higher grade, this heat is being used in the heat regenerative system utilization, and the degradation that belongs to heat energy uses.
Summary of the invention
The object of the present invention is to provide a kind of heat that can reduce again to the influence of backheat, the heat-economy of raising unit, and can improve the efficient therrmodynamic system that is used for again hot unit of large electric power plant unit energy-saving and emission-reduction.
For achieving the above object, the technical scheme that the present invention adopts is: the backheat steam turbine that is connected with high pressure cylinder is set behind the high pressure cylinder of therrmodynamic system, and the bleed steam pipework of backheat steam turbine and exhaust line are connected with high-pressure heater, oxygen-eliminating device respectively.
Backheat steam turbine of the present invention adopts back pressure turbine, and with former steam turbine coaxial arrangement, its position is at the rear portion of former steam turbine high-pressure cylinder.
The backheat steam turbine is set to 0-2 level regenerative steam, its draw gas and steam discharge as the thermal source of bleeder heater.
The present invention is provided with the backheat steam turbine behind the unit high pressure cylinder, utilize this steam turbine draw gas and steam discharge replaces the plurality of sections hot arc therrmodynamic system scheme of drawing gas again, thereby reduce again heat to the influence of backheat, improve unit heat-economy.Adopt the present invention can make large electric power plant unit plant thermal efficiency improve 0.3% relatively, its coa consumption rate descends about about 0.7g/kWh.
Description of drawings
Fig. 1 is a heat flow diagrams of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is done further explain.
Referring to Fig. 1; The present invention is provided with the backheat steam turbine 0 that is connected with high pressure cylinder 6 in high pressure cylinder 6 backs of therrmodynamic system; The bleed steam pipework 1 of backheat steam turbine and exhaust line 2 are connected with high-pressure heater 3, oxygen-eliminating device 4 respectively, and wherein backheat steam turbine 0 adopts back pressure turbine, with former steam turbine coaxial arrangement; Backheat steam turbine 0 is set to 0-2 level regenerative steam, its draw gas and steam discharge as the thermal source of bleeder heater.
The present invention has introduced backheat steam turbine 0, its draw gas 1 and steam discharge 2 supply with high-pressure heater 3 and oxygen-eliminating device 4 respectively.Because these two sections are drawn gas without reheater 5, have the less degree of superheat, the irreversible loss in high-pressure heater 3 and the oxygen-eliminating device 4 is significantly reduced, thereby improved the economy of unit.
The present invention is provided with backheat steam turbine 0 behind high pressure cylinder 6, utilize after the hot colder section steam expansion as replacing existing part hot arc regenerative steam again.Because these several sections degrees of superheat of drawing gas are low, its enthalpy is also low, the regenerative steam amount is increased, thereby reduced cold source energy.
With certain 1000MW supercritical unit is example, and according to the equivalent heat drop principle, the present invention compares with original system, and the variation of its economy is as shown in table 1.When the internal efficiency ratio of backheat steam turbine is 0.88, adopt the present invention can make unit standard gross coal consumption rate decline 0.74g/kWh.
Backheat steam turbine of the present invention and former steam turbine coaxial arrangement, after increasing the backheat steam turbine behind the former steam turbine high-pressure cylinder, all the other equipment and system do not change.To modern large electric power plant unit, generally more than 50t/h, two-stage is more than 100t/h for its single-stage regenerative steam flow, and its pressure is about 4MPa, and its design, manufacturing technology are very ripe, can realize fully.It can also be seen that from table 1 backheat turbine discharge mass dryness fraction satisfies the needs of safe operation fully all more than 0.99.
Corresponding gross coal consumption rate and the steam discharge mass dryness fraction of the different backheat System Turbine Relative Internal Efficiency of table 1
Claims (3)
1. efficient therrmodynamic system that is used for again hot unit; It is characterized in that: high pressure cylinder (6) back in therrmodynamic system is provided with the backheat steam turbine (0) that is connected with high pressure cylinder (6), and bleed steam pipework of backheat steam turbine (1) and exhaust line (2) are connected with high-pressure heater (3), oxygen-eliminating device (4) respectively.
2. the efficient therrmodynamic system that is used for again hot unit according to claim 1 is characterized in that: described backheat steam turbine (0) adopts back pressure turbine, and with former steam turbine coaxial arrangement, its position is at the rear portion of former steam turbine high-pressure cylinder.
3. the efficient therrmodynamic system that is used for again hot unit according to claim 1 is characterized in that: described backheat steam turbine (0) is set to 0-2 level regenerative steam, its draw gas and steam discharge as the thermal source of bleeder heater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102124541A CN102425781A (en) | 2011-07-27 | 2011-07-27 | Efficient thermodynamic system used for reheating unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102124541A CN102425781A (en) | 2011-07-27 | 2011-07-27 | Efficient thermodynamic system used for reheating unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102425781A true CN102425781A (en) | 2012-04-25 |
Family
ID=45959793
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011102124541A Pending CN102425781A (en) | 2011-07-27 | 2011-07-27 | Efficient thermodynamic system used for reheating unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102425781A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103485849A (en) * | 2013-09-30 | 2014-01-01 | 中国电力工程顾问集团华东电力设计院 | Thermodynamic system of backpressure steam extraction small turbine which is coaxial with double reheating main turbine |
| CN103485848A (en) * | 2013-09-30 | 2014-01-01 | 中国电力工程顾问集团华东电力设计院 | Backpressure steam extraction small turbine thermal system which is coaxial with single reheating main turbine |
| CN103925019A (en) * | 2014-04-18 | 2014-07-16 | 国电科学技术研究院 | Matching method of supercritical secondary reheating unit reheater and thermal system |
| CN104456519A (en) * | 2014-11-03 | 2015-03-25 | 章礼道 | Novel efficient water supply heat recovery system for secondary reheating unit |
| CN105649690A (en) * | 2015-12-29 | 2016-06-08 | 西安交通大学 | Large heat-to-electricity ratio combined heat and electricity generation system and work method thereof |
| CN105863754A (en) * | 2016-04-19 | 2016-08-17 | 东南大学 | 700 DEG C ultra-supercritical secondary reheating thermodynamic system |
| CN105888741A (en) * | 2016-05-26 | 2016-08-24 | 国电龙源节能技术有限公司 | Back pressure type steam turbine driving system capable of mixing heat exchange condensation with low pressure deaerator |
| CN106968733A (en) * | 2017-04-27 | 2017-07-21 | 江阴市尚时环境工程有限公司 | Power plant's superhigh-pressure high-temp reheating embrittlement |
| CN110284933A (en) * | 2018-08-15 | 2019-09-27 | 北京润能科技有限公司 | A method of improving small steam turbine electricity generation system efficiency |
| US11473451B2 (en) | 2018-10-10 | 2022-10-18 | Beijing Cynertec Co., Ltd. | Method for improving efficiency of Rankine cycle |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0392507A (en) * | 1989-09-05 | 1991-04-17 | Toshiba Corp | Turbine bypass device for steam turbine |
| US5379588A (en) * | 1990-11-20 | 1995-01-10 | General Electric Company | Reheat steam cycle for a steam and gas turbine combined cycle system |
| CN101261002A (en) * | 2008-04-30 | 2008-09-10 | 华北电力大学 | Super or super supercritical coal fired power generation heat system improvement method |
| JP2011102540A (en) * | 2009-11-10 | 2011-05-26 | Toshiba Corp | Steam turbine power generation facility and method of operating the same |
-
2011
- 2011-07-27 CN CN2011102124541A patent/CN102425781A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0392507A (en) * | 1989-09-05 | 1991-04-17 | Toshiba Corp | Turbine bypass device for steam turbine |
| US5379588A (en) * | 1990-11-20 | 1995-01-10 | General Electric Company | Reheat steam cycle for a steam and gas turbine combined cycle system |
| CN101261002A (en) * | 2008-04-30 | 2008-09-10 | 华北电力大学 | Super or super supercritical coal fired power generation heat system improvement method |
| JP2011102540A (en) * | 2009-11-10 | 2011-05-26 | Toshiba Corp | Steam turbine power generation facility and method of operating the same |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103485849A (en) * | 2013-09-30 | 2014-01-01 | 中国电力工程顾问集团华东电力设计院 | Thermodynamic system of backpressure steam extraction small turbine which is coaxial with double reheating main turbine |
| CN103485848A (en) * | 2013-09-30 | 2014-01-01 | 中国电力工程顾问集团华东电力设计院 | Backpressure steam extraction small turbine thermal system which is coaxial with single reheating main turbine |
| CN103925019A (en) * | 2014-04-18 | 2014-07-16 | 国电科学技术研究院 | Matching method of supercritical secondary reheating unit reheater and thermal system |
| CN103925019B (en) * | 2014-04-18 | 2015-05-13 | 国电科学技术研究院 | Matching method of supercritical secondary reheating unit reheater and thermal system |
| CN104456519A (en) * | 2014-11-03 | 2015-03-25 | 章礼道 | Novel efficient water supply heat recovery system for secondary reheating unit |
| CN105649690A (en) * | 2015-12-29 | 2016-06-08 | 西安交通大学 | Large heat-to-electricity ratio combined heat and electricity generation system and work method thereof |
| CN105863754A (en) * | 2016-04-19 | 2016-08-17 | 东南大学 | 700 DEG C ultra-supercritical secondary reheating thermodynamic system |
| CN105888741A (en) * | 2016-05-26 | 2016-08-24 | 国电龙源节能技术有限公司 | Back pressure type steam turbine driving system capable of mixing heat exchange condensation with low pressure deaerator |
| CN106968733A (en) * | 2017-04-27 | 2017-07-21 | 江阴市尚时环境工程有限公司 | Power plant's superhigh-pressure high-temp reheating embrittlement |
| CN110284933A (en) * | 2018-08-15 | 2019-09-27 | 北京润能科技有限公司 | A method of improving small steam turbine electricity generation system efficiency |
| CN110284933B (en) * | 2018-08-15 | 2020-07-10 | 北京润能科技有限公司 | Method for improving efficiency of small steam turbine power generation system |
| US11473451B2 (en) | 2018-10-10 | 2022-10-18 | Beijing Cynertec Co., Ltd. | Method for improving efficiency of Rankine cycle |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102425781A (en) | Efficient thermodynamic system used for reheating unit | |
| WO2015096414A1 (en) | High-pressure reheating gas-steam combined cycle power generation system and power generation method | |
| CN107989667B (en) | Coal-fired secondary reheating steam turbine generator unit integrating supercritical CO ₂ circulation | |
| CN102828791B (en) | Thermal power plant and united thermodynamic system for thermal power plant | |
| CN203374333U (en) | Power generation system capable of stabilizing electricity peak-valley fluctuation | |
| CN102518480A (en) | Compressed air energy storage and coal-fired boiler integrated power generation system | |
| CN104963776A (en) | Solar heat-complementary combined cycle power generation system | |
| CN103233820A (en) | Integrated power generation system for compressed air energy storage and combined cycle | |
| CN103256644B (en) | Low-pressure expanded economizer system | |
| CN102537935B (en) | Heat regenerative system adopting jet-type heat pumps | |
| CN102758657A (en) | Brown coal pre-drying power generating system integrated with jet heat pump | |
| CN101126348A (en) | Energy reclaiming method and device for coal combination circulation generating system | |
| US20140360191A1 (en) | Energy storage apparatus for the preheating of feed water | |
| CN104533554A (en) | Novel high-efficiency regenerative feedwater heating system for single-reheating unit | |
| CN104456519A (en) | Novel efficient water supply heat recovery system for secondary reheating unit | |
| CN201652318U (en) | Water supply and drainage system of medium-pressure heater of power station | |
| CN102828792B (en) | Thermal power plant combined heat system and thermal power plant | |
| CN102839996A (en) | Heating electricity-cooling generation system using steam regenerator | |
| CN202732011U (en) | Combination thermal system of thermal power plant and thermal power plant | |
| CN203547813U (en) | Power generation device using liquefied natural gas cold energy and solar energy as power sources | |
| CN202732010U (en) | Combination thermal system of thermal power plant and thermal power plant | |
| CN202707153U (en) | Thermoelectricity cooling co-production system utilizing steam heat accumulator | |
| CN201802448U (en) | Million-kilowatt (KW)-level supercritical air cooling turbine | |
| CN203347862U (en) | ORC (Organic Rankine Cycle) low temperature heat power generation system | |
| CN207162510U (en) | A kind of waste heat boiler afterbody heat exchanger system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20120425 |