CN212837980U - Exhaust steam cooling system for small steam turbine of thermal power plant - Google Patents
Exhaust steam cooling system for small steam turbine of thermal power plant Download PDFInfo
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- CN212837980U CN212837980U CN202021156923.3U CN202021156923U CN212837980U CN 212837980 U CN212837980 U CN 212837980U CN 202021156923 U CN202021156923 U CN 202021156923U CN 212837980 U CN212837980 U CN 212837980U
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Abstract
The exhaust steam water cooling system for the small steam turbine of the thermal power plant comprises a first water-cooled condenser, a second water-cooled condenser, an evaporative condenser, a steam exhaust pipeline group, a circulating water pipeline group and a condensed water pipeline group. The first thermal well is higher than the second thermal well, and the condensing coil is higher than the second thermal well. And a third tee pipe of the third exhaust pipeline is connected with a steam inlet of the evaporative condenser. One end of the water inlet branch pipeline is connected with the water inlet main pipeline, the other end of the water inlet branch pipeline is connected with the circulating water tank of the evaporative condenser, one end of the connecting pipeline is connected with the cooling water outlet of the second water-cooled condenser, and the other end of the connecting pipeline is connected with the cooling water inlet of the first water-cooled condenser. One end of the first condensate pipe is connected with a condensate outlet of the evaporative condenser, and the other end of the first condensate pipe is connected with the second hot well; one end of the second condensate pipe is connected with the first hot well, and the other end of the second condensate pipe is connected with the second hot well. The technical problems that the heat exchange quantity of an existing exhaust steam cooling system for a small steam turbine is reduced and the vacuum degree is reduced in a high-temperature high-load stage are solved.
Description
Technical Field
The utility model relates to an electric power energy technical field, in particular to exhaust steam cooling system for little steam turbine of thermal power plant.
Background
With the rapid development of economy in China and the improvement of living standard of people, the demand of society on electric power is continuously increased, and although novel water conservancy power generation, solar power generation and the like exist at present, the main power generation mode is thermal power generation. In the engineering of conventional thermal power plants, the thermal power generating units generally have the problems of low annual utilization hours and reduced unit load rate, and the small steam turbines are adopted to drive the feed pumps and the induced draft fans, so that the service power rate of the thermal power plant can be effectively reduced, the power generation cost is reduced, and the thermal power generating units have better adjusting performance under the condition of unit load change. Therefore, more and more thermal power plants use small turbines to drive feed pumps and induced draft fans.
The small steam turbine generally adopts a steam-driven mode, exhaust steam which does work in the small steam turbine is discharged into the condensing equipment, and is cooled in the condensing equipment to be discharged, condensed and radiated and condensed into water. If the small turbine and the main turbine share the condenser, the power of the small turbine is easily influenced by ambient wind, and under the limit condition, the power of the small turbine is not enough to drive a water feeding pump of a unit, so that the load of the unit is limited; small turbines are therefore generally equipped with independent condensers.
The condenser is divided into a water-cooling condenser and an air-cooling condenser, the air-cooling condenser is generally adopted in the northern China due to lack of water resources, and the water-cooling condenser is generally adopted in the southern China. For the water-cooled condenser adopting the traditional circulating water to cool the steam discharged by the small steam turbine, the hot load in summer is high, the temperature of the circulating water is higher, the cooling capacity of the circulating water is insufficient, and the vacuum degree of the water-cooled condenser is further reduced. The problem that the reduction of the vacuum degree of the water-cooling condenser brings is that: 1. in the aspect of safety, due to the fact that the vacuum degree is reduced, the exhaust temperature is overhigh, abnormal change and low-pressure cylinder deformation of expansion difference of a low-pressure cylinder of a steam turbine are caused, the center of a unit is changed, vibration of the unit is caused, the unit is possibly stopped due to failure, and potential safety hazards exist. 2. The vacuum degree is reduced, the oxygen content in the condensed water is increased, and iron oxide generated by corrosion of condensed water system equipment and pipelines enters a boiler to corrode equipment and pipelines such as a water wall, a superheater and the like on a furnace side. 3. In the economic aspect, the vacuum degree is reduced, the mass transfer resistance is increased, and the heat consumption of the steam turbine is increased. With the annual reduction of the utilization hours of the thermal power generating unit, energy conservation, consumption reduction, reduction of the coal consumption of the power generation of the unit are imperative, and the vacuum degree of the unit is improved, especially the vacuum degree in a high-temperature high-load stage is important.
At present, the main problems of the steam exhaust cooling system for the small steam turbine are as follows: the hot load in summer is high, the circulating water temperature of the water-cooling condenser is higher, the cooling capacity is insufficient, the vacuum degree of the water-cooling condenser is reduced, the unit efficiency is reduced, potential safety hazards exist, and the operation cost is increased.
In view of this, how to improve the heat exchange capacity of the exhaust steam cooling system for the small steam turbine, especially the vacuum degree in the high temperature and high load stage is the subject of the research of the utility model.
Disclosure of Invention
The utility model provides a steam exhaust water cooling system for small steam turbine of thermal power plant, its purpose is to solve the technical problem that current steam exhaust water cooling system for small steam turbine heat transfer volume reduces, the vacuum descends in high temperature high load stage.
In order to achieve the above purpose, the utility model adopts the technical scheme that:
the utility model provides a steam exhaust water cooling system for small steam turbine of thermal power plant, corresponds first small steam turbine, the setting of second small steam turbine, first low pressure jar and second low pressure jar, steam exhaust water cooling system includes first water-cooling condenser, second water-cooling condenser, evaporative condenser, exhaust pipe group, circulating water pipeline group and condensate pipe group.
A first hot well is arranged at the lower part of the first water-cooled condenser, a second hot well is arranged at the lower part of the second water-cooled condenser, and the first hot well is higher than the second hot well; the evaporative condenser comprises a circulating water tank, a circulating pump, a spray header, a condensing coil and an axial flow fan; the condenser coil is higher than the second hot well.
The steam exhaust pipeline group comprises a first steam exhaust pipeline, a second steam exhaust pipeline, a third steam exhaust pipeline, a fourth steam exhaust pipeline and a fifth steam exhaust pipeline; one end of the first steam exhaust pipeline is connected with a waste steam outlet of the first small steam turbine, and the other end of the first steam exhaust pipeline is connected with a steam inlet of the first water-cooled condenser; one end of the second steam exhaust pipeline is connected with a steam exhaust outlet of the second small steam turbine, and the other end of the second steam exhaust pipeline is connected with a steam inlet of the second water-cooled condenser; the third steam exhaust pipeline is a three-way pipeline, the first through pipe is connected with the first steam exhaust pipeline, the second through pipe is connected with the second steam exhaust pipeline, the third three-way pipe is connected with a steam inlet of the evaporative condenser, the connection between the first small steam turbine and the second small steam turbine and the evaporative condenser is achieved, and a butterfly valve is arranged on the third three-way pipe; one end of the fourth steam exhaust pipeline is connected with the first low-pressure cylinder, and the other end of the fourth steam exhaust pipeline is connected with the first water-cooled condenser; and one end of the fifth steam exhaust pipeline is connected with the second low-pressure cylinder, and the other end of the fifth steam exhaust pipeline is connected with the second water-cooling condenser.
The circulating water pipeline group comprises a main water inlet pipeline, a branch water inlet pipeline, a connecting pipeline and a water return pipeline; one end of the main water inlet pipeline is connected with a cooling water inlet of a second water-cooling condenser; one end of the water inlet branch pipeline is connected with the water inlet main pipeline, the other end of the water inlet branch pipeline is connected with a circulating water tank of the evaporative condenser, and a water inlet stop valve is arranged on the water inlet branch pipeline; one end of the connecting pipeline is connected with a cooling water outlet of the second water-cooled condenser, and the other end of the connecting pipeline is connected with a cooling water inlet of the first water-cooled condenser; and one end of the water return pipeline is connected with a cooling water outlet of the first water-cooling condenser.
The condensed water pipeline group comprises a first condensed water pipe, a second condensed water pipe and a third condensed water pipe, one end of the first condensed water pipe is connected with a condensed water outlet of the evaporative condenser, and the other end of the first condensed water pipe is connected with the second hot well; one end of the second condensate pipe is connected with the first hot well, and the other end of the second condensate pipe is connected with the second hot well; and a condensate pump is arranged on the third condensate pipe, and one end of the third condensate pipe is connected with the second hot well and used for discharging condensate.
The relevant content in the above technical solution is explained as follows:
1. in the above-mentioned scheme, evaporative condenser's inner structure is prior art, and is not the technical feature of the utility model, so the utility model discloses do not give unnecessary details, and the technical staff in the field can understand according to prior art.
2. In the above scheme, an evaporative condenser is additionally arranged on the basis of the first water-cooled condenser and the second water-cooled condenser, and the first small steam turbine and the second small steam turbine are connected with the evaporative condenser through a third steam exhaust pipeline. In the high-temperature and high-load stage in summer, partial exhaust steam of the two small turbines is introduced into the evaporative condenser through the switching of the butterfly valve, the steam quantity of the two water-cooled condensers is reduced, the vacuum degree of the two water-cooled condensers is improved, and the heat exchange efficiency of the whole cooling system is improved. And when the cooling system is in a starting stage or the two water-cooled condensers are abnormal, partial exhaust steam of the two small turbines can be discharged into the evaporative condenser to reduce the load pressure of the two water-cooled condensers.
3. In the above scheme, the coolant outlet of second water-cooling condenser is connected to the one end of connecting tube, and the coolant import of first water-cooling condenser is connected to the other end, establishes ties two water-cooling condensers through the connecting tube, and recirculated cooling water passes through the second water-cooling condenser earlier, passes through first water-cooling condenser again, reduces water consumption and energy consumption, and improves cooling efficiency.
4. In the above scheme, one end of the water inlet branch pipeline is connected with the water inlet main pipeline, the other end of the water inlet branch pipeline is connected with the circulating water tank of the evaporative condenser, and the water inlet branch pipeline is provided with the water inlet stop valve. Under normal operating condition, cooling water enters the second water-cooled condenser through the main water inlet pipeline for cooling, then enters the first water-cooled condenser through the connecting pipeline for cooling, and is discharged through the water return pipeline. The cooling water used by the evaporative condenser does not occupy the cooling water volume of the two water-cooled condensers, the water inlet stop valve is normally in a closed state, when the cooling water level in the evaporative condenser is low, the water inlet stop valve is opened, the circulating water has certain water pressure, part of the circulating water is pressed into the water inlet branch pipeline, the circulating water tank of the evaporative condenser is supplemented, and then the water inlet stop valve is closed. This can be done as will be appreciated by those skilled in the art.
5. In the above scheme, first hot well is higher than the second hot well, and first hot well is connected to second condensate pipe one end, and the second hot well is connected to the other end, and the condensate water of first water-cooled condenser flows to first hot well, sets up the purpose of difference in height for the condensate water in the first hot well flows to the second hot well through the second condensate pipe, and the rethread condensate pump is discharged through the third condensate pipe, saves the resource.
6. In the above scheme, the condensing coil is higher than the second heat well, one end of the first condensate pipe is connected with the condensate outlet of the evaporative condenser, and the other end of the first condensate pipe is connected with the second heat well. And a pump is not needed to be additionally arranged, so that resources are saved, and the condensed water is conveniently treated in a centralized manner.
7. In the scheme, one end of the fourth exhaust pipeline is connected with the first low-pressure cylinder, and the other end of the fourth exhaust pipeline is connected with the first water-cooled condenser; and one end of the fifth steam exhaust pipeline is connected with the second low-pressure cylinder, and the other end of the fifth steam exhaust pipeline is connected with the second water-cooling condenser. And the exhaust steam of the two low-pressure cylinders is respectively exhausted into the corresponding condensers.
8. In the above scheme, under the working state, the exhaust steam of the first small steam turbine enters the first water-cooled condenser through the first exhaust steam pipeline, the exhaust steam of the second small steam turbine enters the second water-cooled condenser through the second exhaust steam pipeline, the exhaust steam of the first low-pressure cylinder enters the first water-cooled condenser through the fourth exhaust steam pipeline, and the exhaust steam of the second low-pressure cylinder enters the second water-cooled condenser through the fifth exhaust steam pipeline. When the evaporative condenser is required to be used, a butterfly valve on a third three-way pipe is opened, partial exhaust steam of the first small steam turbine enters the third three-way pipe through the first through pipe so as to enter the evaporative condenser, and partial exhaust steam of the second small steam turbine enters the third three-way pipe through the second through pipe so as to enter the evaporative condenser.
9. In the above scheme, the first exhaust pipeline is provided with a first stop valve.
10. In the above scheme, the second stop valve is arranged on the second steam exhaust pipeline.
11. In the above scheme, a third stop valve is arranged on the first through pipe.
12. In the above scheme, a fourth stop valve is arranged on the second through pipe.
13. In the above scheme, the evaporative condenser is located beside the second water-cooled condenser.
The utility model discloses theory of operation and advantage as follows:
the utility model discloses steam exhaust water cooling system for small steam turbine of thermal power plant on the basis of first water-cooled condenser and second water-cooled condenser, adds and establishes evaporative condenser, and makes first small steam turbine and the small steam turbine of second be connected with evaporative condenser through the third exhaust steam pipe way, and the whole of evaporative condenser and two water-cooled condensers is the parallel relation promptly. The evaporative condenser is low in price, small in occupied space and high in heat exchange efficiency. In the high-temperature and high-load stage in summer, partial exhaust steam of the two small turbines is introduced into the evaporative condenser through the switching of the butterfly valve, the steam quantity of the two water-cooled condensers is reduced, the vacuum degree of the two water-cooled condensers is improved, the safe operation of a unit is facilitated, the heat exchange efficiency of the whole cooling system is improved, and the energy consumption is saved. And when the cooling system is in a starting stage or the two water-cooled condensers are abnormal, partial exhaust steam of the two small turbines can be discharged into the evaporative condenser to reduce the load pressure of the two water-cooled condensers.
The first hot well of the first water-cooled condenser is higher than the second hot well of the second water-cooled condenser, and by utilizing the height difference, a pump does not need to be additionally arranged, and condensed water in the first hot well flows to the second hot well. The condensing coil of the evaporative condenser is higher than the second hot well of the second water-cooled condenser, and a certain pressure difference exists between the evaporative condenser and the second condenser, so that a pump is not required to be additionally arranged, and the condensed water of the evaporative condenser is sucked into the second hot well. The structure is simplified, the resources are saved, and the condensed water is utilized for centralized treatment.
The two water-cooled condensers are connected in series, the circulating cooling water firstly passes through the second water-cooled condenser and then passes through the first water-cooled condenser, the water consumption and the energy consumption are reduced, and the cooling efficiency is improved.
Drawings
Fig. 1 is a schematic structural diagram of a steam exhaust cooling system according to an embodiment of the present invention.
In the above drawings: 1. a first small turbine; 2. a second small turbine; 3. a first water-cooled condenser; 301. a first thermal well; 4. a second water-cooled condenser; 401. a second thermal well; 5. an evaporative condenser; 501. a circulating water tank; 502. a circulation pump; 503. a spray header; 504. a condenser coil; 505. an axial flow fan; 6. a first exhaust conduit; 7. a second exhaust conduit; 8. a third exhaust conduit; 801. a first through pipe; 802. a second pipe; 803. a third pipe; 9. a butterfly valve; 10. a main water inlet pipeline; 11. a water inlet branch pipe; 12. connecting a pipeline; 13. a water return pipe; 14. a water inlet stop valve; 15. a condensate pump; 16. a first low pressure cylinder; 17. a second low pressure cylinder; 18. a fourth exhaust conduit; 19. a fifth exhaust conduit; 20. a first condensate pipe; 21. a second condensate pipe; 22. a third condensate pipe; 23. a first shut-off valve; 24. a second stop valve; 25. a third stop valve; 26. and a fourth stop valve.
Detailed Description
The invention will be further described with reference to the following drawings and examples:
example (b): exhaust steam cooling system for small steam turbine of thermal power plant
Referring to the attached drawing 1, the exhaust steam water cooling system is arranged corresponding to a first small steam turbine 1, a second small steam turbine 2, a first low pressure cylinder 16 and a second low pressure cylinder 17, and comprises a first water-cooled condenser 3, a second water-cooled condenser 4, an evaporative condenser 5, a steam exhaust pipeline group, a circulating water pipeline group and a condensed water pipeline group. The evaporative condenser 5 is located beside the second water-cooled condenser 4.
A first hot well 301 is arranged at the lower part of the first water-cooled condenser 3, a second hot well 401 is arranged at the lower part of the second water-cooled condenser 4, and the first hot well 301 is higher than the second hot well 401; the evaporative condenser 5 comprises a circulating water tank 501, a circulating pump 502, a spray water pipe 503, a condensing coil 504 and an axial flow fan 505; the condenser coil 504 is higher than the second hot well 401.
The steam exhaust pipeline group comprises a first steam exhaust pipeline 6, a second steam exhaust pipeline 7, a third steam exhaust pipeline 8, a fourth steam exhaust pipeline 18 and a fifth steam exhaust pipeline 19; one end of the first exhaust pipeline 6 is connected with an exhaust steam outlet of the first small steam turbine 1, the other end of the first exhaust pipeline is connected with a steam inlet of the first water-cooled condenser 3, and a first stop valve 23 is arranged on the first exhaust pipeline 6; one end of the second steam exhaust pipeline 7 is connected with a steam exhaust outlet of the second small steam turbine 2, the other end of the second steam exhaust pipeline is connected with a steam inlet of the second water-cooled condenser 4, and a second stop valve 24 is arranged on the second steam exhaust pipeline 7; the third steam exhaust pipeline 8 is a three-way pipeline, the first through pipe 801 is connected with the first steam exhaust pipeline 6, the second through pipe 802 is connected with the second steam exhaust pipeline 7, the third through pipe 803 is connected with a steam inlet of the evaporative condenser 5, so that the connection between the first small steam turbine 1 and the second small steam turbine 2 and the evaporative condenser 5 is achieved, the first through pipe 801 is provided with a third stop valve 25, the second through pipe 802 is provided with a fourth stop valve 26, and the third through pipe 803 is provided with a butterfly valve 9; one end of the fourth exhaust steam pipeline 18 is connected with the first low-pressure cylinder 16, and the other end of the fourth exhaust steam pipeline is connected with the first water-cooled condenser 3; one end of the fifth exhaust pipeline 19 is connected with the second low-pressure cylinder 17, and the other end of the fifth exhaust pipeline is connected with the second water-cooled condenser 4.
In an operating state, exhaust steam of the first small steam turbine 1 enters the first water-cooled condenser 3 through the first steam exhaust pipeline 6, exhaust steam of the second small steam turbine 2 enters the second water-cooled condenser 4 through the second steam exhaust pipeline 7, exhaust steam of the first low-pressure cylinder 16 enters the first water-cooled condenser 3 through the fourth steam exhaust pipeline 18, and exhaust steam of the second low-pressure cylinder 17 enters the second water-cooled condenser 4 through the fifth steam exhaust pipeline 19. And a butterfly valve 9 on the third tee pipe 803 is opened, part of the exhaust steam of the first small steam turbine 1 enters the third tee pipe 803 through the first through pipe 801 so as to enter the evaporative condenser 5, and part of the exhaust steam of the second small steam turbine 2 enters the third tee pipe 803 through the second through pipe 802 so as to enter the evaporative condenser 5.
The circulating water pipeline group comprises a main water inlet pipeline 10, a branch water inlet pipeline 11, a connecting pipeline 12 and a water return pipeline 13; one end of the main water inlet pipe 10 is connected with a cooling water inlet of the second water-cooled condenser 4; one end of the water inlet branch pipeline 11 is connected with the water inlet main pipeline 10, the other end of the water inlet branch pipeline is connected with the circulating water tank 501 of the evaporative condenser 5, and a water inlet stop valve 14 is arranged on the water inlet branch pipeline 11; one end of the connecting pipeline 12 is connected with a cooling water outlet of the second water-cooled condenser 4, and the other end of the connecting pipeline is connected with a cooling water inlet of the first water-cooled condenser 3; and one end of the water return pipeline 13 is connected with a cooling water outlet of the first water-cooling condenser 3.
In the working state, the cooling water enters the second water-cooled condenser 4 for cooling through the main water inlet pipe 10, enters the first water-cooled condenser 3 for cooling through the connecting pipe 12, and is discharged through the return water pipe 13. The water inlet stop valve 14 is normally in a closed state, when the liquid level of the cooling water in the evaporative condenser 5 is low, the water inlet stop valve 14 is opened, the cooling water has certain water pressure, part of the cooling water is pressed into the water inlet branch pipeline 11, the cooling water is supplemented into the circulating water tank 501 of the evaporative condenser 5, and then the water inlet stop valve 14 is closed.
The condensed water pipeline group comprises a first condensed water pipe 20, a second condensed water pipe 21 and a third condensed water pipe 22, one end of the first condensed water pipe 20 is connected with a condensed water outlet of the evaporative condenser 5, and the other end of the first condensed water pipe is connected with a second hot well 401; one end of the second condensate pipe 21 is connected with the first hot well 301, and the other end of the second condensate pipe is connected with the second hot well 401; the third condensate pipe 22 is provided with a condensate pump 15, and one end of the third condensate pipe is connected with the second hot well 401 to discharge condensate.
In an operating state, the condensed water in the first hot well 301 flows into the second hot well 401 through the second condensed water pipe 21, and the condensed water in the evaporative condenser 5 flows into the second hot well 401 through the first condensed water pipe 20 and is discharged through the third condensed water pipe 22 by the condensed water pump 15.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.
Claims (6)
1. The utility model provides a steam exhaust water cooling system for little steam turbine of thermal power plant which characterized in that: the exhaust steam water cooling system is arranged corresponding to the first small steam turbine (1), the second small steam turbine (2), the first low pressure cylinder (16) and the second low pressure cylinder (17), and comprises a first water-cooling condenser (3), a second water-cooling condenser (4), an evaporative condenser (5), a steam exhaust pipeline group, a circulating water pipeline group and a condensed water pipeline group;
a first hot well (301) is arranged at the lower part of the first water-cooled condenser (3), a second hot well (401) is arranged at the lower part of the second water-cooled condenser (4), and the first hot well (301) is higher than the second hot well (401); the evaporative condenser (5) comprises a circulating water tank (501), a circulating pump (502), a spray water pipe (503), a condensing coil (504) and an axial flow fan (505); the condenser coil (504) is higher than the second hot well (401);
the steam exhaust pipeline group comprises a first steam exhaust pipeline (6), a second steam exhaust pipeline (7), a third steam exhaust pipeline (8), a fourth steam exhaust pipeline (18) and a fifth steam exhaust pipeline (19); one end of the first steam exhaust pipeline (6) is connected with a steam exhaust outlet of the first small turbine (1), and the other end of the first steam exhaust pipeline is connected with a steam inlet of the first water-cooled condenser (3); one end of the second steam exhaust pipeline (7) is connected with a steam exhaust outlet of the second small turbine (2), and the other end of the second steam exhaust pipeline is connected with a steam inlet of the second water-cooled condenser (4); the third steam exhaust pipeline (8) is a three-way pipeline, the first through pipe (801) is connected with the first steam exhaust pipeline (6), the second through pipe (802) is connected with the second steam exhaust pipeline (7), the third three-way pipe (803) is connected with a steam inlet of the evaporative condenser (5) to achieve the connection between the first small steam turbine (1) and the second small steam turbine (2) and the evaporative condenser (5), and a butterfly valve (9) is arranged on the third three-way pipe (803); one end of the fourth exhaust pipeline (18) is connected with the first low-pressure cylinder (16), and the other end of the fourth exhaust pipeline is connected with the first water-cooled condenser (3); one end of the fifth steam exhaust pipeline (19) is connected with the second low-pressure cylinder (17), and the other end of the fifth steam exhaust pipeline is connected with the second water-cooled condenser (4);
the circulating water pipeline group comprises a main water inlet pipeline (10), a branch water inlet pipeline (11), a connecting pipeline (12) and a water return pipeline (13); one end of the main water inlet pipe (10) is connected with a cooling water inlet of the second water-cooling condenser (4); one end of the water inlet branch pipeline (11) is connected with the water inlet main pipeline (10), the other end of the water inlet branch pipeline is connected with a circulating water tank (501) of the evaporative condenser (5), and a water inlet stop valve (14) is arranged on the water inlet branch pipeline (11); one end of the connecting pipeline (12) is connected with a cooling water outlet of the second water-cooled condenser (4), and the other end of the connecting pipeline is connected with a cooling water inlet of the first water-cooled condenser (3); one end of the water return pipeline (13) is connected with a cooling water outlet of the first water-cooled condenser (3);
the condensed water pipeline group comprises a first condensed water pipe (20), a second condensed water pipe (21) and a third condensed water pipe (22), one end of the first condensed water pipe (20) is connected with a condensed water outlet of the evaporative condenser (5), and the other end of the first condensed water pipe is connected with a second hot well (401); one end of the second condensation water pipe (21) is connected with the first hot well (301), and the other end of the second condensation water pipe is connected with the second hot well (401); and a condensate pump (15) is arranged on the third condensate pipe (22), and one end of the third condensate pipe is connected with the second hot well (401) and used for discharging condensate.
2. The spent steam water cooling system of claim 1, wherein: and a first stop valve (23) is arranged on the first steam exhaust pipeline (6).
3. The spent steam water cooling system of claim 1, wherein: and a second stop valve (24) is arranged on the second steam exhaust pipeline (7).
4. The spent steam water cooling system of claim 1, wherein: and a third stop valve (25) is arranged on the first through pipe (801).
5. The spent steam water cooling system of claim 1, wherein: and a fourth stop valve (26) is arranged on the second through pipe (802).
6. The spent steam water cooling system of claim 1, wherein: the evaporative condenser (5) is positioned beside the second water-cooled condenser (4).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021156923.3U CN212837980U (en) | 2020-06-19 | 2020-06-19 | Exhaust steam cooling system for small steam turbine of thermal power plant |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021156923.3U CN212837980U (en) | 2020-06-19 | 2020-06-19 | Exhaust steam cooling system for small steam turbine of thermal power plant |
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