CN202303336U - Cooling water heat recovering system for generator stator coil - Google Patents
Cooling water heat recovering system for generator stator coil Download PDFInfo
- Publication number
- CN202303336U CN202303336U CN 201120427494 CN201120427494U CN202303336U CN 202303336 U CN202303336 U CN 202303336U CN 201120427494 CN201120427494 CN 201120427494 CN 201120427494 U CN201120427494 U CN 201120427494U CN 202303336 U CN202303336 U CN 202303336U
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- Prior art keywords
- cooling water
- condensate
- stator
- heat
- water heat
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- Expired - Lifetime
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Abstract
The utility model discloses a cooling water heat recovering system for a generator stator coil. A condensate cooling system is arranged before a closed cycle cooling water system; the condensate cooling system includes a shaft seal cooler in a host thermal system and a stator cooling water heat recovering heat exchanger arranged in parallel with the shaft seal cooler; and the stator cooling water heat recovering heat exchanger is connected in parallel with the shaft seal cooler through a condensate by-pass pipe. According to the utility model, the advantages are provided as following: under the condition that the temperature of the generator stator coil cooling water is kept, the heat of the stator water is recovered to the condensate system, not only is the heat economics raised and the normal coal consumption of equipment reduced, but also energy saving and emission reducing effects are enhanced, and the environment is protected.
Description
Technical field
The utility model relates to thermal power plant steam turbine generator stator coil cooling water heat recovery system.
Background technology
For avoiding the electricity generator stator coil overtemperature; Steam turbine generator is provided with stator cooling water (primary water) system usually it is cooled off; With the Shanghai generator 1000MW of factory ultra supercritical unit steam turbine generator is example, and the cooling water of its stator coil (primary water) temperature requirement is: 45～50 ℃ of inlet water temperatures, outlet water temperature≤85 ℃; The water yield is 120t/h, and this part cooling water is through water pump circular flow.For satisfying the import and export coolant water temperature requirement of stator coil; Need the generator unit stator cooling water system is cooled off; Conventional at present way is as shown in Figure 1: cooled off by 1 pair of generator unit stator cooling water system 2 of closed-type circulating cooling water system, and closed-type circulating cooling water system 1 is through 3 coolings of open circulation cooling water system; Or under the condition that open type water quality meets the demands, directly cool off stator water by open type water.In these schemes, the heat that stator cooling water (primary water) is taken out of is finally all taken away and has been lost by open circulation cooling water system 3.
The utility model content
The utility model has overcome shortcoming of the prior art; A kind of electricity generator stator coil cooling water heat recovery system is provided; Under the situation that guarantees the electricity generator stator coil coolant water temperature; With the heat recovery of stator water in condensate system, both improved unit heat-economy, reduced the mark coal consumption of unit, help energy-saving and emission-reduction, protection environment again.
The technical scheme of the utility model is: a kind of electricity generator stator coil cooling water heat recovery system; The condensate cooling system is set before closed-type circulating cooling water system; Said condensate cooling system comprises the shaft sealing cooler in the main frame therrmodynamic system, and the stator cooling water heat that is set up in parallel with shaft sealing cooler reclaims heat exchanger; The side that said stator cooling water heat reclaims heat exchanger links to each other with the generator unit stator cooling water pipeline, and opposite side links to each other with the bypass condensate line of shaft sealing cooler.
Compared with prior art, the utility model has the advantages that:
(1) compare with conventional stator cooling water system, after the employing stator cooling water heat recovery system, the heat loss of unit reduces, and efficient improves, and coal consumption reduces, and helps energy-saving and emission-reduction, protection environment.
(2) after the stator cooling water was provided with heat recovery system, the coal consumption of the generating of unit mark can reduce 0.08g/kw.h approximately, and the initial cost of increase is promptly recyclable within 2 years.Utilize 5500 hours per year, mark 917 yuan/t of coal price calculating, about 7,000,000 yuan of two unit total life cycles (discounting) comprehensive income by 20 years, economic advantages are comparatively obvious.
Description of drawings
The utility model will explain through example and with reference to the mode of accompanying drawing, wherein:
Fig. 1 is existing generator unit stator cooling water and cooling system schematic diagram thereof;
Fig. 2 is the systematic schematic diagram of the utility model.
The specific embodiment
Electricity generator stator coil cooling water heat recovery system; As shown in Figure 2; The condensate cooling system is set before closed-type circulating cooling water system 1; Said condensate cooling system comprises: the shaft sealing cooler 4 in the main frame therrmodynamic system, and the stator cooling water heat that is set up in parallel with shaft sealing cooler 4 reclaims heat exchanger 5; The side that stator cooling water heat reclaims heat exchanger 5 links to each other with the generator unit stator cooling water pipeline, and opposite side links to each other with the bypass condensate line of shaft sealing cooler 4.Said bypass condensate line flow is 1.5～2 times (concrete numerical value needs to require to adjust according to the temperature rise of the temperature requirement of stator cooling water and bypass condensate) of generator unit stator cooling water pipeline flow; The caliber basically identical of the caliber of bypass condensate and stator cooling water pipeline.
Fraction flow condensate from condensate system is picked out by the shaft sealing cooler 4 preceding condensate persons in charge; Reclaim heat exchanger 5 through stator cooling water heat, absorb behind the stator cooling water heat again and to get back to condensate behind the shaft sealing cooler 4 through the condensate shunt valve and go in being responsible for.Because the flow of this part condensate only accounts for the very little part of whole condensing water flows in the therrmodynamic system; It absorbs the temperature rise behind the stator cooling water heat; Be more or less the same with the temperature rise before and after the shaft sealing cooler; Therefore, the fraction condensate that has absorbed stator cooling water heat is got back to condensate, and to be responsible for the back all very little with the influence that causes of flowing to the temperature of condensate in being responsible for, and can ignore.
The operation principle of the utility model is:
Because other the subsidiary engine apparatus in comparison that need cool off with power plant, the stator cooling water system has following characteristics: 1. water temperature is higher, and its water outlet reaches 60～85 ℃, and the heat that carries is big and grade is higher, is beneficial to and adopts condensate to reclaim; 2. the low-temperature zone of stator cooling water system next-door neighbour condensate is convenient to system's connection, and the pipeline resistance is little.Therefore, if can get into the steam turbine heat regenerative system, be good for improving unit heat economy at this part heat of situation recover that less input.For reclaiming this part heat; The utility model closes cold water through employing and condensate (recovery heat) is cooled off the generator unit stator cooling water system; Promptly in the generator unit stator cooling water system, set up heat recovery system (condensate cooling system); The generator unit stator cooling water backwater that temperature is higher is cooled off by the condensate of the lower temperature of condenser 6 hot wells outlet, and the heat that stator water discharges is reclaimed by condensate.In addition, also can be the former chilled water cooler that closes bypass is set, when cooling off with condensate system, the stator cooling water is walked former bypass of closing chilled water cooler, and is little to the influence of stator cooling water pump lift like this.
Claims (1)
1. electricity generator stator coil cooling water heat recovery system; It is characterized in that: the condensate cooling system is set before closed-type circulating cooling water system; Said condensate cooling system comprises the shaft sealing cooler in the main frame therrmodynamic system, and the stator cooling water heat that is set up in parallel with shaft sealing cooler reclaims heat exchanger; The side that said stator cooling water heat reclaims heat exchanger links to each other with the generator unit stator cooling water pipeline, and opposite side links to each other with the bypass condensate line of shaft sealing cooler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120427494 CN202303336U (en) | 2011-11-02 | 2011-11-02 | Cooling water heat recovering system for generator stator coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120427494 CN202303336U (en) | 2011-11-02 | 2011-11-02 | Cooling water heat recovering system for generator stator coil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202303336U true CN202303336U (en) | 2012-07-04 |
Family
ID=46372223
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120427494 Expired - Lifetime CN202303336U (en) | 2011-11-02 | 2011-11-02 | Cooling water heat recovering system for generator stator coil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202303336U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102393009A (en) * | 2011-11-02 | 2012-03-28 | 中国电力工程顾问集团西南电力设计院 | Cooling water heat recycling system of power generator stator coil |
-
2011
- 2011-11-02 CN CN 201120427494 patent/CN202303336U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102393009A (en) * | 2011-11-02 | 2012-03-28 | 中国电力工程顾问集团西南电力设计院 | Cooling water heat recycling system of power generator stator coil |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: CHINA POWER ENGINEERING CONSULTING GROUP SOUTHWEST Free format text: FORMER NAME: SOUTHWEST ELECTRIC POWER DESIGN INSTITUTE OF CHINA POWER ENGINEERING CONSULTING GROUP CORPORATION |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 610021 No. 18 Dongfeng Road, Sichuan, Chengdu Patentee after: China Power Engineering Consulting Group Southwest Electric Power Design Institute Co., Ltd. Address before: 610021 No. 18 Dongfeng Road, Sichuan, Chengdu Patentee before: Southwest Electric Power Design Institute of China Power Engineering Consulting Group Corporation |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120704 |