CN212690121U - Anti-freezing system applied to electric water supply direct air cooling heat supply steam turbine unit - Google Patents
Anti-freezing system applied to electric water supply direct air cooling heat supply steam turbine unit Download PDFInfo
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- CN212690121U CN212690121U CN202021619926.6U CN202021619926U CN212690121U CN 212690121 U CN212690121 U CN 212690121U CN 202021619926 U CN202021619926 U CN 202021619926U CN 212690121 U CN212690121 U CN 212690121U
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Abstract
The utility model provides a be applied to frostproofing system of direct air cooling heat supply steam turbine unit of electronic feedwater, includes boiler feed-water pump, motor, drive steam turbine, steam turbine exhaust bypass and air cooling island, and wherein, boiler feed-water pump links to each other with the motor, and motor and drive steam turbine link to each other, and motor and drive steam turbine all link to each other with the air cooling steam turbine, and air cooling steam turbine unit links to each other with the air cooling island, and the gas vent of drive steam turbine links to each other with the air cooling island through steam turbine exhaust bypass. The utility model discloses to this configuration characteristics of motor drive boiler feed pump of most direct air cooling turbosets adoption, reform transform original motor-driven feed pump into vapour electricity and drive system. In the original electric feed water pump system, a driving steam turbine is added, so that the steam turbine and the motor can drive the feed water pump simultaneously. The system reforms the original electric feed pump into a steam-electricity co-drive system, so that the auxiliary power of the unit can be reduced, and the economical efficiency of the unit is improved.
Description
Technical Field
The utility model belongs to the frostproofing field in air cooling island relates to a be applied to frostproofing system of direct air cooling heat supply turbine unit of electronic feedwater.
Background
With the rapid development of cities, the heat supply area of northern cities is increasing, more and more northern cities begin to develop cogeneration under the conditions of energy utilization efficiency and more severe environmental protection, and the heat supply area borne by heat supply units around the cities is increasing. For the direct air cooling unit, along with the continuous increase of heat supply load, the steam admission quantity of the air cooling island is continuously reduced, the steam admission quantity of the air cooling island of part of units is even smaller than the minimum anti-freezing flow quantity, the anti-freezing pressure of the air cooling island is higher in winter, and the challenges are brought to the safe and reliable operation of the unit.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects, the utility model aims to provide a be applied to the system of preventing frostbite of direct air cooling heat supply turbine unit of electronic feedwater, this system has that it is effectual to prevent frostbite, can promote unit economic nature and fail safe nature.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a be applied to frostproofing system of direct air cooling heat supply steam turbine unit of electronic feedwater, includes boiler feed-water pump, motor, drive steam turbine, steam turbine exhaust bypass and air cooling island, and wherein, boiler feed-water pump links to each other with the motor, and motor and drive steam turbine link to each other, and motor and drive steam turbine all link to each other with the air cooling steam turbine, and air cooling steam turbine unit links to each other with the air cooling island, and the gas vent of drive steam turbine links to each other with the air cooling island through steam turbine exhaust bypass.
The utility model discloses further improvement lies in, and drive steam turbine's gas vent still links to each other with the condenser.
The utility model discloses further improvement lies in, and motor, boiler feed pump and drive steam turbine are coaxial to be arranged.
The utility model discloses further improvement lies in, is provided with the valves on the steam turbine exhaust bypass.
The utility model discloses a further improvement lies in, when the unit low-load operation, boiler feed water pump is driven by motor and drive steam turbine.
Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses to this configuration characteristics of motor drive boiler feed pump of most direct air cooling turbosets adoption, reform transform original motor-driven feed pump into vapour electricity and drive system. In the original electric feed water pump system, a driving steam turbine is added, so that the steam turbine and the motor can drive the feed water pump simultaneously. The system reforms the original electric feed pump into a steam-electricity co-drive system, so that the auxiliary power of the unit can be reduced, and the economical efficiency of the unit is improved.
Further, when the unit operates under the working condition of minimum flow of the air cooling island in winter, the air inlet valve of the air cooling island is closed, the steam turbine exhaust bypass is put into operation, and exhaust steam is introduced into the newly-added condenser for cooling. At the moment, the air cooling island is completely cut off, and the problem of freezing prevention of the air cooling island in winter is thoroughly solved. The driving turbine is adopted to drive the boiler feed pump, the steam inlet quantity of the driving turbine is reduced due to the increase of the heat load of the condenser, the shaft power is reduced, and the reduced shaft power is complemented by the motor. When the unit runs in summer, the output of the unit is limited due to overhigh back pressure of the air cooling unit, and the steam-electricity co-drive mode of a water feed pump can be adopted at the moment, so that the output of the unit is improved.
Drawings
Fig. 1 is a schematic structural view of the present invention;
wherein, 1, a boiler feed pump; 2. an electric motor; 3. a steam turbine; 4. a condenser; 5. a steam turbine exhaust bypass; 6. an air cooling island; 7. and (5) air cooling the steam turbine.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
Referring to fig. 1, the utility model discloses a be applied to frostproofing system of electronic feedwater direct air cooling heat supply steam turbine unit, including boiler feed water pump 1, motor 2, drive steam turbine 3, steam turbine exhaust bypass 5 and air cooling island 6, wherein, boiler feed water pump 1 links to each other with motor 2, and motor 2 and drive steam turbine 3 link to each other, and motor 2 and drive steam turbine 3 all link to each other with air cooling steam turbine 7, and air cooling steam turbine unit links to each other with air cooling island 6, and drive steam turbine 3's gas vent links to each other with air cooling island 6 through steam turbine exhaust bypass 5. The exhaust port of the drive turbine 3 is also connected to the condenser 4.
The utility model discloses adopt this configuration characteristics of motor drive boiler feed pump 1 to most direct air cooling turboset, reform transform original motor-driven feed pump into vapour electricity and drive system. In the prior electric feed water pump system, a drive turbine 3 is added, and the drive turbine 3 and a motor 2 drive a boiler feed water pump 1 simultaneously. The driving turbine 3 is selected from turbine cold, and then is taken as a high-low pressure steam source together with 4-section steam extraction, and the newly-added condenser 4 is used for cooling the driving turbine 3 to exhaust steam. Add steam turbine exhaust bypass 5 on original steam turbine exhaust pipe, set up the valves on steam turbine exhaust bypass 5, 5 one end of steam turbine exhaust bypass links to each other with the gas vent of drive turbine 3, and the other end links to each other with the air inlet of air cooling island 6.
When the unit operates under the working condition of minimum flow of the air cooling island in winter, the steam inlet valve of the air cooling island 6 is closed, the steam turbine exhaust bypass 5 is put into operation, and exhaust steam is introduced into the newly-added condenser 4 for cooling. At the moment, the air cooling island 6 is completely cut off, and the problem of freezing prevention of the air cooling island 6 in winter is thoroughly solved. The driving turbine 3 is adopted to drive the boiler feed water pump 1, the heat load of the condenser 4 is increased, the steam inlet quantity of the turbine 3 is reduced, the shaft power is reduced, and the reduced shaft power is complemented by the motor 2.
When the unit runs in summer, the output of the unit is limited due to overhigh back pressure of the air cooling unit, and the steam-electricity co-drive mode of the boiler feed pump 1 can be adopted at the moment, so that the output of the unit is improved.
When the unit operates at low load, because the steam extraction pressure of the 4 sections is insufficient, the boiler feed pump 1 drives the steam turbine 3 to output insufficient power, and at the moment, the boiler feed pump 1 is driven by the motor 2 and the drive steam turbine 3 simultaneously to play a role in supplementing the output of the boiler feed pump 1.
The system reforms the original electric feed pump into a steam-electricity co-drive system, so that the auxiliary power of the unit can be reduced, and the economical efficiency of the unit is improved.
The utility model discloses in, through newly-increased motor 2, boiler feed pump 1 and the 3 coaxial arrangements of steam turbine, play vapour electricity and drive the effect together. In the winter heat supply deep cold period, the steam turbine exhaust bypass 5 is put into use, the exhaust steam of the original air-cooled steam turbine 3 is guided into the condenser 4 for cooling, the air cooling island 6 is isolated, and the air cooling island 6 is prevented from freezing. The driving turbine 3 can also be adopted to drive the boiler feed water pump 1 independently, the exhaust steam of the turbine 3 enters the air cooling island 6 through the turbine exhaust steam bypass 5, the steam inlet quantity of the air cooling island 6 is increased, and the anti-freezing pressure of the air cooling island 6 is reduced.
Claims (5)
1. The utility model provides a be applied to frostproofing system of direct air cooling heat supply steam turbine group of electronic feedwater, a serial communication port, including boiler feedwater pump (1), motor (2), drive steam turbine (3), steam turbine steam extraction bypass (5) and air cooling island (6), wherein, boiler feedwater pump (1) links to each other with motor (2), motor (2) and drive steam turbine (3) link to each other, and motor (2) and drive steam turbine (3) all link to each other with air cooling steam turbine (7), air cooling steam turbine group links to each other with air cooling island (6), the gas vent of drive steam turbine (3) links to each other with air cooling island (6) through steam turbine steam extraction bypass (5).
2. An anti-freeze system for an electric water fed direct air cooled heated steam turbine plant as claimed in claim 1, characterised in that the exhaust of the drive turbine (3) is also connected to the condenser (4).
3. An anti-icing system for an electric direct air-cooled hot-water turbine unit according to claim 1, characterized in that the electric motor (2), the boiler feed pump (1) and the drive turbine (3) are arranged coaxially.
4. An anti-freezing system for an electric direct air-cooled hot-water supply steam turbine unit as claimed in claim 1, wherein the steam turbine exhaust bypass (5) is provided with a valve set.
5. An anti-freeze system for an electric fed-water direct air-cooled heating steam turbine plant according to claim 1, characterized in that the boiler feed water pump (1) is driven by the electric motor (2) and the drive turbine (3) during low load operation of the plant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021619926.6U CN212690121U (en) | 2020-08-06 | 2020-08-06 | Anti-freezing system applied to electric water supply direct air cooling heat supply steam turbine unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021619926.6U CN212690121U (en) | 2020-08-06 | 2020-08-06 | Anti-freezing system applied to electric water supply direct air cooling heat supply steam turbine unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212690121U true CN212690121U (en) | 2021-03-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021619926.6U Active CN212690121U (en) | 2020-08-06 | 2020-08-06 | Anti-freezing system applied to electric water supply direct air cooling heat supply steam turbine unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212690121U (en) |
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2020
- 2020-08-06 CN CN202021619926.6U patent/CN212690121U/en active Active
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