CN202441442U - Regenerated steam-driven draught fan thermodynamic cycle system of air cooling unit of power plant - Google Patents
Regenerated steam-driven draught fan thermodynamic cycle system of air cooling unit of power plant Download PDFInfo
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- CN202441442U CN202441442U CN2012200519768U CN201220051976U CN202441442U CN 202441442 U CN202441442 U CN 202441442U CN 2012200519768 U CN2012200519768 U CN 2012200519768U CN 201220051976 U CN201220051976 U CN 201220051976U CN 202441442 U CN202441442 U CN 202441442U
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Abstract
The utility model discloses a regenerated steam-driven draught fan thermodynamic cycle system of an air cooling unit of a power plant. The regenerated steam-driven draught fan thermodynamic cycle system comprises an intermediate pressure cylinder, a small steam turbine, a condensed water pipeline, a deaerator, a condensed water pump, a mainframe condenser and a plurality of low pressure heaters, wherein the low pressure heaters are provided with steam inlets, dewatering outlets and superior dewatering inlets, the condensed water pipelines communicated the deaerator, the low pressure heaters, the condensed water pump and the mainframe condenser in sequence, a steam inlet pipe system of the small steam turbine is connected with a steam extraction pipe system of the intermediate pressure cylinder, a steam exhaust pipe system of the small steam turbine is connected with the steam inlets of the low pressure heaters, and the dewatering outlet of one low pressure heaters can be connected with the superior dewaering inlet of another low pressure heater or the mainframe condenser. The regenerated steam-driven draught fan thermodynamic cycle system disclosed by the utility model has the advantages that the exhaust steam of the small steam turbine is fully used, both working media and heat are recovered, and the cycle efficiency of the entire thermal system is increased.
Description
Technical field
The utility model relates to a kind of power station Air-cooled Unit regenerative heat type steam-operating induced draught fan circulation system.
Background technique
As shown in Figure 1; Existing power station Air-cooled Unit regenerative heat type steam-operating induced draught fan thermodynamic system; Generally comprise boiler 1, high-pressure cylinder 2, intermediate pressure cylinder 3, low pressure (LP) cylinder 4, generator 5, main frame vapour condenser 6, condensate pump 7, seven grades of heat regenerative systems, small turbine 12, independent vapour condenser 13 and boiler induced-draft fans 14 etc.; Wherein seven grades of heat regenerative systems are made up of three high-pressure heaters 11, an oxygen-eliminating device 10 and three low-pressure heaters 9; Low-pressure heater 9 generally has the hydrophobic inlet of water of condensation inlet, water of condensation outlet, higher level 18, steam inlet 16 and hydrophobic outlet 17; Wherein outlet is connected with condensing water conduit 8 the water of condensation inlet with water of condensation; Steam inlet 16 can be connected with the extraction steam pipeline of intermediate pressure cylinder 3; Hydrophobic outlet 17 can be connected with hydrophobic inlet 18 of the higher level of another low-pressure heater 9 or main frame vapour condenser 6, and condensing water conduit 8 is communicated with boiler 1, three high-pressure heaters 11, oxygen-eliminating device 10, three low-pressure heaters 9, condensate pump 7 and main frame vapour condenser 6 in order, forms one thus and passes the path that be used to transmit water of condensation of seven grades of heat regenerative systems to boiler 1 from main frame vapour condenser 6.
During the thermodynamic system running; Water of condensation in the main frame vapour condenser 6 acts on and the constantly heating of the low-pressure heater 9 of flowing through in order, oxygen-eliminating device 10 and high-pressure heater 11 and quilt through condensate pump 7; Getting into boiler 1 then further is heated as the steam that meets the generating requirement and gets into acting in high-pressure cylinder 2, intermediate pressure cylinder 3 and the low pressure (LP) cylinder 4 in order; Drive generator 5 generatings, the steam discharge of last low pressure (LP) cylinder 4 gets into main frame vapour condenser 6 again and is condensed into water of condensation, so circulation; The steam that from high-pressure cylinder 2, intermediate pressure cylinder 3 and low pressure (LP) cylinder 4, extracts is used to heat the water of condensation of high-pressure heater 11, oxygen-eliminating device 10 and low-pressure heater 9 of flowing through, and flows into main frame vapour condenser 6 or oxygen-eliminating device 10 at last and becomes circuit water of condensation next time; Wherein small turbine 12 is used to drive boiler induced-draft fan 14 or boiler feed pump etc.; The admission piping of small turbine 12 can be connected with the extraction steam pipeline of high-pressure cylinder 2, intermediate pressure cylinder 3 or low pressure (LP) cylinder 4; Its exhaust steam pipeline can be connected with independent vapour condenser 13 or main frame vapour condenser 6; The circulating water of independent vapour condenser 13 or main frame vapour condenser 6 is condensed into water of condensation with the steam discharge of small turbine 12 and reclaims; But the heat of steam discharge will be drained along with circulating water, can not be recovered in the power station Air-cooled Unit regenerative heat type circulation system, thereby make the cycle efficiency of whole thermodynamic system not high.
Thermodynamic system is under high back pressure, low-load situation, because the difference of the vapour side pressure of last two-stage low-pressure heater is less, hydrophobic water-head is bigger, and hydrophobic piping resistance is big, and hydrophobic not smooth problem often appears in system, influences the Economy of regenerative steam.
Summary of the invention
The purpose of the utility model is the defective that overcomes existing technology, and a kind of power station Air-cooled Unit regenerative heat type steam-operating induced draught fan circulation system is provided.
The technical solution of the utility model is: a kind of power station Air-cooled Unit regenerative heat type steam-operating induced draught fan circulation system; Comprise that intermediate pressure cylinder, small turbine, condensing water conduit, oxygen-eliminating device, condensate pump, main frame vapour condenser and several have the low-pressure heater of steam inlet, hydrophobic outlet and the hydrophobic inlet of higher level; Condensing water conduit is communicated with oxygen-eliminating device, low-pressure heater, condensate pump and main frame vapour condenser in order; The admission piping of small turbine can be connected with the extraction steam pipeline of intermediate pressure cylinder; The exhaust steam pipeline of said small turbine is connected with the steam inlet of said low-pressure heater, and the hydrophobic outlet of said low-pressure heater can be connected with hydrophobic inlet of the higher level of another low-pressure heater or said main frame vapour condenser.
The steam that drives the small turbine running can draw gas from intermediate pressure cylinder; Steam discharge after the small turbine acting gets into low-pressure heater by the steam inlet; And the water of condensation of the low-pressure heater of flowing through heated, discharge and get into the low-pressure heater or the main frame vapour condenser of next stage through the hydrophobic outlet of low-pressure heater then, thereby the steam discharge of small turbine is fully used; Not only reclaim its working medium but also reclaimed its heat, improved the cycle efficiency of whole thermodynamic system.
Said low-pressure heater is four; Be respectively one-level low-pressure heater, secondary low-pressure heater, three grades of low-pressure heaters, have the level Four low-pressure heater of hydrophobic outlet and steam inlet; Said condensing water conduit is communicated with said oxygen-eliminating device, one-level low-pressure heater, secondary low-pressure heater, three grades of low-pressure heaters, level Four low-pressure heater, said condensate pump and said main frame vapour condenser in order, and the exhaust steam pipeline of said small turbine is connected with the steam inlet of level Four low-pressure heater.
The steam discharge of small turbine gets into the afterbody low-pressure heater, makes that the heat-economy of system is better, and system complexity is lower.
A kind of power station Air-cooled Unit regenerative heat type steam-operating induced draught fan circulation system; Also comprise drainage pump, the hydrophobic outlet of said level Four low-pressure heater is connected on the said condensing water conduit between said three grades of low-pressure heaters and the said level Four low-pressure heater through drainage pump.
The steam discharge that gets into the level Four low-pressure heater is condensed into water of condensation discharge by hydrophobic outlet after; Not getting into the main frame vapour condenser is cooled off by circulating water; But at the condensing water conduit that flows under the effect of drainage pump between three grades of low-pressure heaters and the level Four low-pressure heater; Deliver to the boiler heating and get into pressure cylinder with condensing water conduit then and do work again, further reclaimed its heat, improved the cycle efficiency of whole thermodynamic system.And solved this heat regenerative system hydrophobic not smooth problem under high back pressure, low-load situation.
The hydrophobic outlet of said secondary low-pressure heater is connected on the said condensing water conduit between said one-level low-pressure heater and the said secondary low-pressure heater through drainage pump.
Get into the secondary low-pressure heater draw gas with hydrophobic be condensed into water of condensation and discharge by hydrophobic outlet after; Not getting into the main frame vapour condenser is cooled off by circulating water; But at the condensing water conduit that flows under the effect of drainage pump between one-level low-pressure heater and the secondary low-pressure heater; Deliver to the boiler heating and get into pressure cylinder with condensing water conduit then and do work again, further reclaimed its heat, improved the cycle efficiency of whole thermodynamic system.
The utility model has the advantages that: the steam discharge of small turbine is fully used, has not only reclaimed its working medium but also reclaimed its heat, improved the cycle efficiency of whole thermodynamic system.
Description of drawings
Fig. 1 is the structural representation of power station of the prior art Air-cooled Unit regenerative heat type steam-operating induced draught fan circulation system;
Fig. 2 is the structural representation of 1 one kinds of power station of the utility model embodiment Air-cooled Unit regenerative heat type steam-operating induced draught fan circulation system;
Fig. 3 is the structural representation of 2 one kinds of power station of the utility model embodiment Air-cooled Unit regenerative heat type steam-operating induced draught fan circulation system;
1. boiler, 2. high-pressure cylinder, 3. intermediate pressure cylinder, 4. low pressure (LP) cylinder, 5. generator, 6. main frame vapour condenser; 7. condensate pump, 8. condensing water conduit, 9. low-pressure heater, 10. oxygen-eliminating device, 11. high-pressure heaters, 12. small turbines; 13. independent vapour condenser, 14. boiler induced-draft fans, 15. drainage pumps, 16. steam inlets, 17. hydrophobic outlets; 18. the hydrophobic inlet of higher level, 91. one-level low-pressure heaters, 92. secondary low-pressure heaters, 93. 3 grades of low-pressure heaters, 94. level Four low-pressure heaters.
Embodiment
Embodiment 1:
Consult Fig. 2; A kind of power station Air-cooled Unit regenerative heat type steam-operating induced draught fan circulation system; Comprise that intermediate pressure cylinder 3, small turbine 12, condensing water conduit 8, oxygen-eliminating device 10, condensate pump 7, main frame vapour condenser 6 and several have the low-pressure heater 9 of steam inlet 16, hydrophobic outlet 17 and the hydrophobic inlet 18 of higher level; Condensing water conduit 8 is communicated with oxygen-eliminating device 10, low-pressure heater 9, condensate pump 7 and main frame vapour condenser 6 in order, and the admission piping of small turbine 12 can be connected with the extraction steam pipeline of intermediate pressure cylinder 3; Said low-pressure heater 9 is four; Be respectively one-level low-pressure heater 91, secondary low-pressure heater 92, three grades of low-pressure heaters 93, have the level Four low-pressure heater 94 of hydrophobic outlet 17 and steam inlet 16; Said condensing water conduit 8 is communicated with said oxygen-eliminating device 10, one-level low-pressure heater 91, secondary low-pressure heater 92, three grades of low-pressure heaters 93, level Four low-pressure heater 94, said condensate pump 7 and said main frame vapour condenser 6 in order, and the exhaust steam pipeline of said small turbine 12 is connected with the steam inlet 16 of level Four low-pressure heater 94; This circulation system also comprises drainage pump 15, and the hydrophobic outlet 17 of said level Four low-pressure heater 94 is connected on the said condensing water conduit 8 between said three grades of low-pressure heaters 93 and the said level Four low-pressure heater 94 through drainage pump 15.
The steam that drives small turbine 12 runnings can drawing gas from intermediate pressure cylinder 3; Steam discharge after small turbine 12 actings gets into level Four low-pressure heater 94 by steam inlet 16; And the water of condensation of the level Four low-pressure heater 94 of flowing through heated; The steam discharge that gets into level Four low-pressure heater 94 is condensed into water of condensation discharge by hydrophobic outlet 17 after; Do not get into main frame vapour condenser 6 by the circulating water cooling, but, deliver to boiler 1 heating and get into pressure cylinder with condensing water conduit 8 then and do work again at the condensing water conduit 8 that flows under the effect of drainage pump 15 between three grades of low-pressure heaters 93 and the level Four low-pressure heater 94; Further reclaim its heat, improved the cycle efficiency of whole thermodynamic system.
Embodiment 2:
Consult Fig. 3; A kind of power station Air-cooled Unit regenerative heat type steam-operating induced draught fan circulation system; Comprise that intermediate pressure cylinder 3, small turbine 12, condensing water conduit 8, oxygen-eliminating device 10, condensate pump 7, main frame vapour condenser 6 and several have the low-pressure heater 9 of steam inlet 16, hydrophobic outlet 17 and the hydrophobic inlet 18 of higher level; Condensing water conduit 8 is communicated with oxygen-eliminating device 10, low-pressure heater 9, condensate pump 7 and main frame vapour condenser 6 in order, and the admission piping of small turbine 12 can be connected with the extraction steam pipeline of intermediate pressure cylinder 3; Said low-pressure heater 9 is four; Be respectively one-level low-pressure heater 91, secondary low-pressure heater 92, three grades of low-pressure heaters 93, have the level Four low-pressure heater 94 of hydrophobic outlet 17 and steam inlet 16; Said condensing water conduit 8 is communicated with said oxygen-eliminating device 10, one-level low-pressure heater 91, secondary low-pressure heater 92, three grades of low-pressure heaters 93, level Four low-pressure heater 94, said condensate pump 7 and said main frame vapour condenser 6 in order, and the exhaust steam pipeline of said small turbine 12 is connected with the steam inlet 16 of level Four low-pressure heater 94; This circulation system also comprises drainage pump 15, and the hydrophobic outlet 17 of said level Four low-pressure heater 94 is connected on the said condensing water conduit 8 between said three grades of low-pressure heaters 93 and the said level Four low-pressure heater 94 through drainage pump 15.The hydrophobic outlet 17 of said secondary low-pressure heater 92 is connected on the said condensing water conduit 8 between said one-level low-pressure heater 91 and the said secondary low-pressure heater 92 through drainage pump 15.
The steam that drives small turbine 12 runnings can drawing gas from intermediate pressure cylinder 3; Steam discharge after small turbine 12 actings gets into level Four low-pressure heater 94 by steam inlet 16; And the water of condensation of the level Four low-pressure heater 94 of flowing through heated; The steam discharge that gets into level Four low-pressure heater 94 is condensed into water of condensation discharge by hydrophobic outlet 17 after; Do not get into main frame vapour condenser 6 by the circulating water cooling, but, deliver to boiler 1 heating and get into pressure cylinder with condensing water conduit 8 then and do work again at the condensing water conduit 8 that flows under the effect of drainage pump 15 between three grades of low-pressure heaters 93 and the level Four low-pressure heater 94.Get into secondary low-pressure heater 92 draw gas with hydrophobic be condensed into water of condensation and discharge by hydrophobic outlet after; Not getting into main frame vapour condenser 6 is cooled off by circulating water; But at the condensing water conduit 8 that flows under the effect of drainage pump 15 between one-level low-pressure heater 91 and the secondary low-pressure heater 92; Deliver to boiler 1 heating and get into pressure cylinder with condensing water conduit 8 then and do work again, further reclaimed its heat, improved the cycle efficiency of whole thermodynamic system.
Above-listed detailed description is specifying to one of the utility model possible embodiments; This embodiment is not the claim in order to restriction the utility model; Allly do not break away from the equivalence that the utility model does and implement or change, all should be contained in the claim of this case.
Claims (4)
1. power station Air-cooled Unit regenerative heat type steam-operating induced draught fan circulation system; Comprise that intermediate pressure cylinder, small turbine, condensing water conduit, oxygen-eliminating device, condensate pump, main frame vapour condenser and several have the low-pressure heater of steam inlet, hydrophobic outlet and the hydrophobic inlet of higher level; Condensing water conduit is communicated with oxygen-eliminating device, low-pressure heater, condensate pump and main frame vapour condenser in order; The admission piping of small turbine can be connected with the extraction steam pipeline of intermediate pressure cylinder; It is characterized in that; The exhaust steam pipeline of said small turbine is connected with the steam inlet of said low-pressure heater, and the hydrophobic outlet of said low-pressure heater can be connected with hydrophobic inlet of the higher level of another low-pressure heater or said main frame vapour condenser.
2. a kind of power station according to claim 1 Air-cooled Unit regenerative heat type steam-operating induced draught fan circulation system; It is characterized in that; Said low-pressure heater is four; Be respectively one-level low-pressure heater, secondary low-pressure heater, three grades of low-pressure heaters, have the level Four low-pressure heater of hydrophobic outlet and steam inlet; Said condensing water conduit is communicated with said oxygen-eliminating device, one-level low-pressure heater, secondary low-pressure heater, three grades of low-pressure heaters, level Four low-pressure heater, said condensate pump and said main frame vapour condenser in order, and the exhaust steam pipeline of said small turbine is connected with the steam inlet of level Four low-pressure heater.
3. a kind of power station according to claim 2 Air-cooled Unit regenerative heat type steam-operating induced draught fan circulation system; It is characterized in that; Also comprise drainage pump, the hydrophobic outlet of said level Four low-pressure heater is connected on the said condensing water conduit between said three grades of low-pressure heaters and the said level Four low-pressure heater through drainage pump.
4. a kind of power station according to claim 3 Air-cooled Unit regenerative heat type steam-operating induced draught fan circulation system; It is characterized in that the hydrophobic outlet of said secondary low-pressure heater is connected on the said condensing water conduit between said one-level low-pressure heater and the said secondary low-pressure heater through said drainage pump.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012200519768U CN202441442U (en) | 2012-02-17 | 2012-02-17 | Regenerated steam-driven draught fan thermodynamic cycle system of air cooling unit of power plant |
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| CN2012200519768U CN202441442U (en) | 2012-02-17 | 2012-02-17 | Regenerated steam-driven draught fan thermodynamic cycle system of air cooling unit of power plant |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103195521A (en) * | 2013-04-23 | 2013-07-10 | 上海汽轮机厂有限公司 | Double-turbine steam thermodynamic system with regenerative steam extraction function |
| CN104405459A (en) * | 2014-11-21 | 2015-03-11 | 华电国际电力股份有限公司技术服务中心 | Backpressure machine acting and heat supply device for steam exhaust heat supply network of intermediate pressure cylinder of steam turbine |
| CN104454036A (en) * | 2014-11-28 | 2015-03-25 | 中国华能集团公司 | Electrical coupling steam-driven induced draft fan system of coal-fired generating unit |
| CN104989470A (en) * | 2015-07-06 | 2015-10-21 | 华电电力科学研究院 | Energy gradient utilization system and method for small turbine of thermal power plant |
| CN112302986A (en) * | 2020-10-29 | 2021-02-02 | 西安西热节能技术有限公司 | Method for measuring efficiency of independent condensing steam-driven draught fan |
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2012
- 2012-02-17 CN CN2012200519768U patent/CN202441442U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103195521A (en) * | 2013-04-23 | 2013-07-10 | 上海汽轮机厂有限公司 | Double-turbine steam thermodynamic system with regenerative steam extraction function |
| CN104405459A (en) * | 2014-11-21 | 2015-03-11 | 华电国际电力股份有限公司技术服务中心 | Backpressure machine acting and heat supply device for steam exhaust heat supply network of intermediate pressure cylinder of steam turbine |
| CN104405459B (en) * | 2014-11-21 | 2016-06-01 | 华电国际电力股份有限公司技术服务中心 | For back pressure machine acting and the heating plant of Steam Turbine Through IP Admission steam discharge heating network |
| CN104454036A (en) * | 2014-11-28 | 2015-03-25 | 中国华能集团公司 | Electrical coupling steam-driven induced draft fan system of coal-fired generating unit |
| CN104989470A (en) * | 2015-07-06 | 2015-10-21 | 华电电力科学研究院 | Energy gradient utilization system and method for small turbine of thermal power plant |
| CN104989470B (en) * | 2015-07-06 | 2016-10-26 | 华电电力科学研究院 | A kind of thermal power plant small turbine cascaded utilization of energy system and method |
| CN112302986A (en) * | 2020-10-29 | 2021-02-02 | 西安西热节能技术有限公司 | Method for measuring efficiency of independent condensing steam-driven draught fan |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: CHINA ENERGY ENGINEERING GROUP GUANGDONG ELECTRIC Free format text: FORMER NAME: GUANGDONG ELECTRIC POWER DESIGN INSTITUTE Owner name: CHINA ENERGY ENGINEERING GROUP GUANGDONG ELECTRIC Free format text: FORMER NAME: CHINA ENERGY ENGINEERING GROUP GUANGDONG ELECTRIC POWER DESIGN INSTITUTE |
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| CP01 | Change in the name or title of a patent holder |
Address after: 510663 Luogang District, Guangdong, Guangzhou Science City Fung Road, No. 1, No. Patentee after: CHINA ENERGY ENGINEERING GROUP GUANGDONG ELECTRIC POWER DESIGN INSTITUTE Co.,Ltd. Address before: 510663 Luogang District, Guangdong, Guangzhou Science City Fung Road, No. 1, No. Patentee before: GUANGDONG ELECTRIC POWER DESIGN INSTITUTE OF CHINA ENERGY ENGINEERING GROUP Co.,Ltd. Address after: 510663 Luogang District, Guangdong, Guangzhou Science City Fung Road, No. 1, No. Patentee after: GUANGDONG ELECTRIC POWER DESIGN INSTITUTE OF CHINA ENERGY ENGINEERING GROUP Co.,Ltd. Address before: 510663 Luogang District, Guangdong, Guangzhou Science City Fung Road, No. 1, No. Patentee before: Guangdong Electric Power Design Institute |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120919 Termination date: 20190217 |