CN115164186A - External steam cooling system for reducing heat exchange end difference of supercritical gas generator set - Google Patents
External steam cooling system for reducing heat exchange end difference of supercritical gas generator set Download PDFInfo
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- CN115164186A CN115164186A CN202210810107.7A CN202210810107A CN115164186A CN 115164186 A CN115164186 A CN 115164186A CN 202210810107 A CN202210810107 A CN 202210810107A CN 115164186 A CN115164186 A CN 115164186A
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- 238000001816 cooling Methods 0.000 title claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 105
- 238000000605 extraction Methods 0.000 claims abstract description 56
- 238000010438 heat treatment Methods 0.000 claims abstract description 24
- 239000003034 coal gas Substances 0.000 claims 1
- 230000001172 regenerating effect Effects 0.000 abstract description 8
- 238000010248 power generation Methods 0.000 abstract description 4
- 238000010977 unit operation Methods 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000004364 calculation method Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/42—Applications, arrangements or dispositions of alarm or automatic safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
- F01K25/08—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours
- F01K25/10—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours the vapours being cold, e.g. ammonia, carbon dioxide, ether
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/10—Water tubes; Accessories therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/42—Applications, arrangements or dispositions of alarm or automatic safety devices
- F22B37/44—Applications, arrangements or dispositions of alarm or automatic safety devices of safety valves
- F22B37/446—Safety devices responsive to overpressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D21/0001—Recuperative heat exchangers
- F28D21/0014—Recuperative heat exchangers the heat being recuperated from waste air or from vapors
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention relates to the technical field of supercritical gas power generation, in particular to an external steam cooling system for reducing the heat exchange end difference of a supercritical gas generator set. According to the invention, the external steam cooler is added to perform classified use on high-temperature extraction steam, so that the medium heat exchange end difference can be greatly reduced, the optimal heat exchange end difference configuration of high-pressure regenerative extraction steam is realized, the regenerative heating efficiency of the unit is improved, the boiler feed water temperature can be improved, and the unit operation economy is further improved.
Description
Technical Field
The invention relates to the technical field of supercritical gas power generation, in particular to an external steam cooling system for reducing heat exchange end difference of a supercritical gas generator set.
Background
In recent years, in order to respond to the national call for energy conservation and emission reduction, a plurality of iron and steel enterprises change waste into valuable, the surplus gas generated in the iron and steel production process is efficiently recycled by adopting an advanced gas power generation technology, and the rapid development of the gas power generation technology is continuously promoted. In the gas generator set, high-pressure feed water is heated in a high-pressure heater by using regenerative steam extraction of a steam turbine before entering a boiler economizer. The extraction steam undergoes three stages in the high pressure heater: a steam cooling section, a steam condensing section and a hydrophobic cooling section.
In a supercritical gas generator set, three-section regenerative steam extraction of a steam turbine is carried out from the front section of a medium pressure cylinder, the temperature is very high, and if the steam turbine is directly sent into a high-pressure heater to heat high-pressure feed water, the energy loss is very large due to the large upper end difference and low heat exchange efficiency. Therefore, it is necessary to design an external steam cooling system for reducing the heat exchange end difference of the supercritical gas generator set, so as to solve the above problems.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide the external steam cooling system for reducing the heat exchange end difference of the supercritical gas generator set, the heat exchange end difference of a medium can be greatly reduced by using high-temperature extraction steam in a grading manner, the optimal heat exchange end difference configuration of high-pressure regenerative extraction steam is realized, the regenerative heating efficiency of the unit is improved, and meanwhile, the feed water temperature of a boiler can be improved, so that the running economy of the unit is improved.
In order to achieve the purpose, the technical scheme of the invention is that the external steam cooling system for reducing the heat exchange end difference of the supercritical gas generator set comprises a three-section steam extraction pipeline of a steam turbine, an external steam cooler steam side outlet pipeline, and a high-pressure steam extraction heating unit, an external steam cooler water inlet pipeline, an external steam cooler and an external steam cooler water outlet pipeline of the steam turbine, which are sequentially connected, wherein the three-section steam extraction pipeline of the steam turbine is communicated with a steam inlet of the external steam cooler, and a steam outlet of the external steam cooler is communicated with the high-pressure steam extraction heating unit of the steam turbine through the external steam cooler steam side outlet pipeline.
Further, still include external steam cooler bypass pipeline and external steam cooler female pipe of giving water out, the one end of external steam cooler bypass pipeline with external steam cooler inlet channel with steam turbine high pressure extraction heating unit's delivery port passes through tee bend a intercommunication, the other end of external steam cooler bypass pipeline and external steam cooler outlet conduit with external steam cooler female pipe of giving water out is through tee bend b intercommunication.
Furthermore, a throttle orifice plate is arranged in the external steam cooler bypass pipeline.
Furthermore, the external steam cooler water inlet pipeline is communicated with the water inlet of the external steam cooler through a reducing pipe, and the size of the inlet end of the reducing pipe is larger than that of the outlet end of the reducing pipe.
Furthermore, the steam turbine high-pressure steam extraction heating unit comprises a 3# high-pressure heater water inlet pipeline, a 3# high-pressure heater water outlet pipeline, a 2# high-pressure heater and a 2# high-pressure heater water outlet pipeline which are connected in sequence; and the steam side outlet pipeline of the external steam cooler is communicated with the steam inlet of the 3# high-pressure heater.
Furthermore, the steam inlet of the 2# high-pressure heater is communicated with a second-stage steam extraction pipeline of the steam turbine.
Furthermore, the steam turbine high pressure extraction heating unit still includes 1# high pressure feed water heater, 1# high pressure feed water outlet pipe way and one section steam extraction pipeline of steam turbine, 2# high pressure feed water outlet pipe way 1# high pressure feed water heater the 1# high pressure feed water outlet pipe way with external steam cooler inlet pipe connects gradually, one section steam extraction pipeline of steam turbine with 1# high pressure feed water heater's steam inlet intercommunication.
Furthermore, the No. 3 high-pressure heater water outlet pipeline is also connected with a high water adding side safety valve.
Compared with the prior art, the invention has the following beneficial effects:
(1) According to the invention, by adding the external steam cooler, three-section steam extraction of the steam turbine is firstly sent to the external steam cooler with the highest water supply temperature for heat exchange, and then is sent to the 3# high-pressure heater for heating high-pressure water supply after being cooled to a proper temperature, and high-temperature steam is used in a grading manner, so that the heat exchange end difference of an effective medium can be realized, the optimal heat exchange end difference configuration of high-pressure backheating steam extraction is realized, the backheating heating efficiency of a unit is improved, the water supply temperature of a boiler can be improved by about 5 ℃, the running economy of the unit is further improved, and the heat consumption of the unit is reduced by about 20 kJ/kW.h;
(2) According to the invention, an external steam cooler bypass pipeline and a throttling orifice plate form an external steam cooler water supply bypass, the optimal external steam cooler and 3# high-pressure heater heat load distribution is determined through calculation and analysis, the heat exchange capacity and the heat exchange area of the external steam cooler are further determined, the heat exchange water supply flow is calculated according to an ideal water outlet temperature, and the size of the throttling orifice plate is further determined through calculation, so that the water outlet temperature of an external steam cooler water outlet main pipe meets the requirement;
(3) According to the invention, the safety valve on the high water adding side is additionally connected with the water outlet pipeline of the No. 3 high-pressure heater to form an overpressure protection pipeline on the high water adding side, and when the pressure of high-pressure water supply exceeds the designed safety limit, the safety valve on the high water adding side jumps, the system pressure is released, and the system safety is protected.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic diagram of an external steam cooling system for reducing a heat exchange end difference of a supercritical gas generator set according to an embodiment of the present invention;
in the figure: 1. a 3# high-pressure heater water inlet pipeline; 2. 3# high pressure heater; 3. a high water addition side safety valve; 4. 3# high-pressure heater outlet pipe; 5. 2# high pressure heater; 6. a No. 2 high-pressure heater water outlet pipeline; 7. 1# high pressure heater; 8. 1# high pressure heater outlet pipe; 9. a tee joint a; 10. an external steam cooler water inlet pipeline; 11. a reducing pipe; 12. an external steam cooler; 13. an external steam cooler water outlet pipeline; 14. an external steam cooler bypass pipe; 15. a restriction orifice; 16. a tee joint b; 17. an external steam cooler water outlet main pipe; 18. a second-stage steam extraction pipeline of the steam turbine; 19. a first section of steam extraction pipeline of the steam turbine; 20. three-stage steam extraction pipelines of the steam turbine; 21. an external steam cooler steam side outlet pipeline.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
As shown in fig. 1, the embodiment provides an external steam cooling system for reducing the heat exchange end difference of a supercritical gas generator set, which includes a three-stage steam extraction pipeline 20 of a steam turbine, an external steam cooler steam side outlet pipeline 21, and a high-pressure steam extraction heating unit of the steam turbine, an external steam cooler water inlet pipeline 10, an external steam cooler 12, and an external steam cooler water outlet pipeline 13, which are sequentially connected to each other, where the three-stage steam extraction pipeline 20 of the steam turbine is communicated with a steam inlet of the external steam cooler 12, and a steam outlet of the external steam cooler 12 is communicated with the high-pressure steam extraction heating unit of the steam turbine through the external steam cooler steam side outlet pipeline 21. In the embodiment, the three-stage extracted steam of the steam turbine firstly enters the external steam cooler 12 through the three-stage extracted steam pipeline 20 of the steam turbine to heat the high-pressure feed water therein, and the steam cooled by heat exchange passes through the steam side outlet pipeline 21 of the external steam cooler to the high-pressure extracted steam heating unit of the steam turbine to heat the high-pressure feed water, so that the staged utilization of the three-stage extracted steam of the steam turbine can be realized.
Because the three-section extraction steam of the steam turbine is taken from the front section of the intermediate pressure cylinder of the steam turbine, the steam temperature is very high, the quality is better, the external steam cooler 12 is firstly put in to exchange the high-temperature steam overheat heat energy with the high-temperature feed water, then the high-temperature steam enters the No. 3 high-pressure heater 2 of the high-pressure extraction steam heating unit of the steam turbine, and the high-pressure feed water is heated by using the residual latent heat and a small part of overheat heat energy, so that the difference of the heat exchange ends of the three-section extraction steam of the steam turbine can be greatly reduced, the graded utilization of the high-temperature steam is realized, and the heat exchange efficiency is improved.
Optimize above-mentioned embodiment, still include the female pipe 17 of external steam cooler bypass pipeline 14 and external steam cooler play water, the one end of external steam cooler bypass pipeline 14 with external steam cooler inlet channel 10 with the delivery port of steam turbine high pressure extraction heating unit passes through tee bend a 9 intercommunication, the other end of external steam cooler bypass pipeline 14 and external steam cooler outlet channel 13 with the female pipe 17 of external steam cooler play water communicates through tee bend b 16. Further, a throttle orifice 15 is disposed in the external steam cooler bypass pipe 14. In this embodiment, the tee joint a 9, the external steam cooler bypass pipeline 14, the orifice plate 15, and the tee joint b 16 form a water supply bypass of the external steam cooler 12, and the bypass can adjust the internal heat exchange capacity of the external steam cooler 12, thereby finding out the optimal heat exchange area of the external steam cooler 12.
The size of the orifice 15 is determined by the amount of bypass flow. In this embodiment, the optimal heat load distribution of the external steam cooler 12 and the # 3 high-pressure heater 2 may be determined through calculation and analysis, the heat exchange capacity and the heat exchange area of the external steam cooler 12 are further determined, the heat exchange water supply flow rate is calculated according to an ideal water outlet temperature, the heat exchange water supply flow rate is subtracted from the total high-pressure water supply flow rate to obtain the bypass flow rate, and the size of the orifice plate 15 is further calculated.
In an optimized embodiment, the external steam cooler water inlet pipeline 10 is communicated with the water inlet of the external steam cooler 12 through a reducing pipe 11, and the size of the inlet end of the reducing pipe 11 is larger than that of the outlet end. In this embodiment, the external steam cooler water inlet pipe 10 is connected to the external steam cooler 12 through the reducing pipe 11, and the flow rate entering the external steam cooler 12 is adjusted through the reducing pipe 11.
The embodiment is refined, and the steam turbine high-pressure steam extraction heating unit comprises a 3# high-pressure heater water inlet pipeline 1, a 3# high-pressure heater 2, a 3# high-pressure heater water outlet pipeline 4, a 2# high-pressure heater 5 and a 2# high-pressure heater water outlet pipeline 6 which are connected in sequence; and the steam side outlet pipeline 21 of the external steam cooler is communicated with a steam inlet of the No. 3 high-pressure heater 2. In this embodiment, the steam of the three-stage extracted steam of the steam turbine after being cooled by the external steam cooler 12 enters the # 3 high-pressure heater 2 through the steam-side outlet pipeline 21 of the external steam cooler, and heats the high-pressure feed water in the # 3 high-pressure heater 2.
Further, the steam inlet of the 2# high pressure heater 5 is communicated with a second-stage steam extraction pipeline 18 of the steam turbine. In this embodiment, the secondary extraction steam enters the # 2 high-pressure heater 5 through the secondary extraction steam pipe 18 of the steam turbine to heat the high-pressure feed water therein.
Optimally, the steam turbine high pressure extraction heating unit still includes 1# high pressure feed water heater 7, 1# high pressure feed water heater outlet pipe 8 and one section steam extraction pipeline 19 of steam turbine, 2# high pressure feed water heater outlet pipe 6 1# high pressure feed water heater 7 1# high pressure feed water heater outlet pipe 8 with external steam cooler inlet pipe 10 connects gradually, one section steam extraction pipeline 19 of steam turbine with 1# high pressure feed water heater 7's steam inlet intercommunication. In the embodiment, the primary extraction steam of the steam turbine enters the # 1 high-pressure heater 7 through the primary extraction steam pipeline 19 of the steam turbine to heat the high-pressure feed water therein.
In the embodiment, the 3# high-pressure heater water outlet pipeline 4 is further connected with the high water-adding-side safety valve 3. In the embodiment, a high water adding side safety valve 3 is additionally arranged to be connected with a No. 3 high-pressure heater water outlet pipeline 4 to form a high water adding side overpressure protection pipeline; when the high-pressure water supply pressure exceeds the designed safety limit, the safety valve 3 at the high water supply side jumps, the system pressure is released, and the system safety is protected.
As shown in fig. 1, a 3# high-pressure heater water inlet pipeline 1, a 3# high-pressure heater 2, a 3# high-pressure heater water outlet pipeline 4, a 2# high-pressure heater 5, a 2# high-pressure heater water outlet pipeline 6, a 1# high-pressure heater 7, a 1# high-pressure heater water outlet pipeline 8, a tee joint a 9, an external steam cooler water inlet pipeline 10, a reducer pipe 11, an external steam cooler 12, an external steam cooler water outlet pipeline 13, a tee joint b 16, and an external steam cooler water outlet main pipe 17 are connected in sequence to form a high-pressure water supply pipeline; the tee joint a 9, the external steam cooler bypass pipeline 14, the orifice plate 15 and the tee joint b 16 are connected in sequence to form a water supply bypass of the external steam cooler 12. The first-stage extraction steam of the steam turbine is connected with a steam inlet of the No. 1 high-pressure heater 7 through a first-stage extraction steam pipeline 19 of the steam turbine, the second-stage extraction steam of the steam turbine is connected with a steam inlet of the No. 2 high-pressure heater 5 through a second-stage extraction steam pipeline 18 of the steam turbine, the third-stage extraction steam of the steam turbine is connected with a steam inlet of the external steam cooler 12 through a third-stage extraction steam pipeline 20 of the steam turbine, a steam outlet of the external steam cooler 12 is connected with a steam inlet of the No. 3 high-pressure heater 2 through a steam side outlet pipeline 21 of the external steam cooler, and the four ways form a heating steam pipeline. High-pressure feed water at the outlet of the feed pump enters a high-pressure feed water pipeline, and is heated by a 3# high-pressure heater 2, a 2# high-pressure heater 5, a 1# high-pressure heater 7 and an external steam cooler 12 host in sequence, so that the temperature of the high-pressure feed water is gradually increased to a proper temperature; by adding the external steam cooler 12, three-section extraction steam of the steam turbine is firstly sent into the external steam cooler 12 with the highest water supply temperature for heat exchange, is cooled to a proper temperature and then is sent into the 3# high-pressure heater 2 for heating high-pressure water supply, and high-temperature steam is used in a grading manner, so that the heat exchange end difference of an effective medium can be realized, the optimal heat exchange end difference configuration of high-pressure regenerative extraction steam is realized, the regenerative heating efficiency of a unit is improved, the water supply temperature of a boiler can be improved by about 5 ℃, the running economy of the unit is improved, and the heat consumption of the unit is reduced by about 20 kJ/kW.h.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. The utility model provides a reduce external steam cooling system of supercritical coal gas generating set heat transfer end difference which characterized in that: the steam turbine high-pressure steam extraction heating unit, the external steam cooler water inlet pipeline, the external steam cooler and the external steam cooler water outlet pipeline are sequentially connected, the steam turbine three-section steam extraction pipeline is communicated with a steam inlet of the external steam cooler, and a steam outlet of the external steam cooler is communicated with the external steam cooler steam side outlet pipeline and the steam turbine high-pressure steam extraction heating unit.
2. The external steam cooling system for reducing the heat exchange end difference of the supercritical gas generator set according to claim 1, is characterized in that: still include external steam cooler bypass pipeline and the female pipe of external steam cooler play water, the one end of external steam cooler bypass pipeline with external steam cooler inlet channel with the delivery port of steam turbine high pressure extraction heating element passes through tee bend a intercommunication, the other end of external steam cooler bypass pipeline and external steam cooler outlet pipe with the female pipe of external steam cooler play water passes through tee bend b intercommunication.
3. The external steam cooling system for reducing the heat exchange end difference of the supercritical gas generator set according to claim 2, characterized in that: and a throttling orifice plate is arranged in the bypass pipeline of the external steam cooler.
4. The external steam cooling system for reducing the heat exchange end difference of the supercritical gas generator set according to claim 1, is characterized in that: the external steam cooler water inlet pipeline is communicated with the water inlet of the external steam cooler through a reducing pipe, and the size of the inlet end of the reducing pipe is larger than that of the outlet end.
5. The external steam cooling system for reducing the heat exchange end difference of the supercritical gas generator set according to claim 1, wherein: the steam turbine high-pressure extraction heating unit comprises a 3# high-pressure heater water inlet pipeline, a 3# high-pressure heater water outlet pipeline, a 2# high-pressure heater and a 2# high-pressure heater water outlet pipeline which are connected in sequence; and the steam side outlet pipeline of the external steam cooler is communicated with a steam inlet of the 3# high-pressure heater.
6. The external steam cooling system for reducing the heat exchange end difference of the supercritical gas generator set according to claim 5, is characterized in that: and the steam inlet of the 2# high-pressure heater is communicated with a two-stage steam extraction pipeline of the steam turbine.
7. The external steam cooling system for reducing the heat exchange end difference of the supercritical gas generator set according to claim 5, is characterized in that: the steam turbine high pressure steam extraction heating unit still includes 1# high pressure feed water heater, 1# high pressure feed water outlet pipe way and one section steam extraction pipeline of steam turbine, 2# high pressure feed water outlet pipe way 1# high pressure feed water heater outlet pipe way with external steam cooler inlet pipe connects gradually, one section steam extraction pipeline of steam turbine with 1# high pressure feed water heater's steam inlet intercommunication.
8. The external steam cooling system for reducing the heat exchange end difference of the supercritical gas generator set according to claim 5, is characterized in that: and the 3# high-pressure heater water outlet pipeline is also connected with a high water adding side safety valve.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210810107.7A CN115164186A (en) | 2022-07-11 | 2022-07-11 | External steam cooling system for reducing heat exchange end difference of supercritical gas generator set |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210810107.7A CN115164186A (en) | 2022-07-11 | 2022-07-11 | External steam cooling system for reducing heat exchange end difference of supercritical gas generator set |
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| CN202546728U (en) * | 2012-01-17 | 2012-11-21 | 浙江省电力设计院 | External tandem type steam cooler in heat regenerative system of large thermal power plant |
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| CN109099414A (en) * | 2018-08-15 | 2018-12-28 | 华北电力大学 | The double reheat system of integral external steam condenser and regenerative steam turbine |
| CN211011314U (en) * | 2019-08-12 | 2020-07-14 | 国电宝鸡发电有限责任公司 | Heating, draining, water-feeding and heat-returning system of external steam cooler of 600MW supercritical thermal power generating unit |
| CN212057241U (en) * | 2020-04-10 | 2020-12-01 | 山东电力工程咨询院有限公司 | Thermal power generating unit deoxidization-free thermodynamic system |
-
2022
- 2022-07-11 CN CN202210810107.7A patent/CN115164186A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202546728U (en) * | 2012-01-17 | 2012-11-21 | 浙江省电力设计院 | External tandem type steam cooler in heat regenerative system of large thermal power plant |
| CN103115349A (en) * | 2013-03-11 | 2013-05-22 | 中国电力工程顾问集团华东电力设计院 | Externally arranged steam cooler system in heat regenerative system of power plant and heat regenerative system |
| CN204786335U (en) * | 2015-07-02 | 2015-11-18 | 东方电气集团东方锅炉股份有限公司 | Diverging device mainly feeds water in power station |
| CN105333415A (en) * | 2015-11-25 | 2016-02-17 | 中国能源建设集团浙江省电力设计院有限公司 | Water supply system of low-capacity external type steam cooler |
| CN109099414A (en) * | 2018-08-15 | 2018-12-28 | 华北电力大学 | The double reheat system of integral external steam condenser and regenerative steam turbine |
| CN211011314U (en) * | 2019-08-12 | 2020-07-14 | 国电宝鸡发电有限责任公司 | Heating, draining, water-feeding and heat-returning system of external steam cooler of 600MW supercritical thermal power generating unit |
| CN212057241U (en) * | 2020-04-10 | 2020-12-01 | 山东电力工程咨询院有限公司 | Thermal power generating unit deoxidization-free thermodynamic system |
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