CN207960693U - A kind of steam heat-exchanging recovery system of steam turbine oil sealing - Google Patents
A kind of steam heat-exchanging recovery system of steam turbine oil sealing Download PDFInfo
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- CN207960693U CN207960693U CN201721901907.0U CN201721901907U CN207960693U CN 207960693 U CN207960693 U CN 207960693U CN 201721901907 U CN201721901907 U CN 201721901907U CN 207960693 U CN207960693 U CN 207960693U
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Abstract
The utility model is related to a kind of steam heat-exchanging recovery systems of steam turbine oil sealing, including steam turbine and shaft seal steam main pipe, the preceding axle envelope and rear shaft seal that steam turbine rear ends are installed respectively, the preceding axle envelope and rear shaft seal are connect by branched pipe with shaft seal steam main pipe respectively, and the branched pipe of the Rear oil seal is equipped with manograph, steam turbine lower part is connected with low-pressure pumping steam pipe, which is connected with low-pressure heater；Low-pressure heater top is connected with axle envelope return tube, which is equipped with return valve, and end is connect with shaft seal steam main pipe；Return valve is connected with motor, which passes through wire connection controller；Controller connects pressure regulator, which is connect by conducting wire with manograph.The utility model ensures shaft seal steam pressure stability, and steam is prevented to be discharged into air, increases safety in operation, reduces thermal losses.
Description
Technical field
The utility model is related to a kind of recycling of the steam heat-exchanging of oil sealing air supply system field more particularly to steam turbine oil sealing to be
System.
Background technology
Gland seal system steam supply is given by main steam pipe when steam turbine starts, passes through pitch gas leakage, master in normal operation
Porthole gas leakage, ensure gland seal system pressure of steam supply stabilization, shaft seal steam pressure cannot it is excessively high can not be too low, ensure in 0.2-
0.5 kilogram or so, stable shaft seal steam pressure energy prevents high-pressure side steam from not leaking into air and enters high-pressure side bearing housing, no
Cause oily emulsification；Low-pressure side air, which does not leak into cylinder, simultaneously influences vacuum.Currently, when Steam Turbine is run, load increases, deoxygenation
Device pressure rise can cause axial seal pressure to increase to 2 kilograms or so, and gland steam amount is big, make a large amount of gas leakage of front and back axle envelope, bearing
Case water inlet is serious, and to turbine oil system safe operation, there are prodigious threats, while thermal losses increases, and makes the hot property of unit
It reduces.
Invention content
To solve the above problems, the utility model provides a kind of guarantee shaft seal steam pressure stability, reduces steam and be discharged into greatly
Tolerance increases safety in operation, reduces the steam heat-exchanging recovery system of the steam turbine oil sealing of thermal losses.
Technical solution used by the utility model is realized in：A kind of steam heat-exchanging recycling system of steam turbine oil sealing
System, including steam turbine and shaft seal steam main pipe, the preceding axle envelope and rear shaft seal that the steam turbine rear ends are installed respectively, the front axle
Envelope and rear shaft seal are connect by branched pipe with the shaft seal steam main pipe respectively, and the branched pipe of the rear shaft seal is equipped with pressure measurement
Device, it is characterised in that：The steam turbine lower part is connected with low-pressure pumping steam pipe, which is connected with low-pressure heating
Device；The low-pressure heater top is connected with axle envelope return tube, which is equipped with return valve, and end and the axis
Gland sealing steam supply main pipe connects；The return valve is connected with motor, which passes through wire connection controller；The controller connects
Pressure regulator is connect, which is connect by conducting wire with the manograph.
Return water condenser is dredged in the low-pressure heater bottom connection, and the low-pressure heater lower part intakes equipped with condensed water
Pipe, upper part are equipped with condensed water outlet pipe.
The condensed water water inlet pipe and condensed water outlet pipe are oppositely arranged, and are connect respectively with the thin return water condenser.
The utility model has the following advantages compared with prior art：
The utility model detects rear shaft seal by the way that controller and pressure regulator, pressure regulator are arranged in steam-supplying system by manograph
Supply gas pressure, controller control the steam supply of return valve, ensure shaft seal steam pressure stability, and steam is prevented to be discharged into air, increase fortune
Row safety, meanwhile, heat exchange recycling is carried out by low-pressure pumping steam pipe steam extraction to low-pressure heater, reduces thermal losses.
Description of the drawings
Specific embodiment of the present utility model is described in further detail below in conjunction with the accompanying drawings.
Fig. 1 is the system structure diagram of the utility model.
In figure：1. steam turbine, axle envelope before 2., 3. rear shaft seals, 4. shaft seal steam main pipes, 5. manographs, 6. low-pressure pumping steam pipes,
7. low-pressure heater, 8. axle envelope return tubes, 9. return valves, 10. motor, 11. controllers, 12. pressure regulators, 13. thin return water are solidifying
Vapour device, 14. condensed water water inlet pipes, 15. condensed water outlet pipes.
Specific implementation mode
As shown in Figure 1, a kind of steam heat-exchanging recovery system of steam turbine oil sealing, including steam turbine 1 and shaft seal steam main pipe
4, the preceding axle envelope 2 and rear shaft seal 3 that 1 rear ends of steam turbine are installed respectively, the preceding axle envelope 2 and rear shaft seal 3 pass through branched pipe respectively
It is connect with the shaft seal steam main pipe 4, and the branched pipe of the rear shaft seal 3 is equipped with manograph 5,1 lower part of steam turbine is connected with low
Extraction steam pipe 6 is pressed, which is connected with low-pressure heater 7；Return water condenser is dredged in the connection of 7 bottom of low-pressure heater
13, and 7 lower part of low-pressure heater is equipped with condensed water water inlet pipe 14, upper part is equipped with condensed water outlet pipe 15；Condensed water is intake
Pipe 14 and condensed water outlet pipe 15 are oppositely arranged, and are connect respectively with thin return water condenser 13；7 top of low-pressure heater is connected with
Axle envelope return tube 8, which is equipped with return valve 9, and end is connect with shaft seal steam main pipe 4；Return valve 9 connects
There is motor 10, which passes through wire connection controller 11；Controller 11 connects pressure regulator 12, which passes through
Conducting wire is connect with manograph 5.
When work, steam turbine 1 start by shaft seal steam busbar 4 give 3 steam supply of Front oil seal 2 and rear shaft seal, when steam turbine 1 just
The stabilization of gland seal system pressure of steam supply is at 0.2-0.5 kilogram when often running；When 1 unit load of steam turbine increase, rear shaft seal 3
Manograph 5 measures the increase of oil seal system pressure of steam supply, and low-pressure pumping steam pipe 6 starts to 1 steam extraction of steam turbine, and controller 11 controls electronic
10 closing volume valve 9 of machine, makes the steam in axle envelope return tube 8 not be back in shaft seal steam main pipe 4, makes that its steam supply, to go out vapour flat
Weighing apparatus, steam enter low-pressure heater 7, dredge return water condenser 13 and carry out water supply to low-pressure heater 7 by condensed water water inlet pipe 14,
Steam heats water supply, is recycled by condensed water outlet pipe 15 after improving water temperature, reduces thermal losses, and some vapor passes through axle envelope return tube
8 reflux；When pressure of steam supply declines, pressure regulator 12 gives 11 signal of controller, controller 11 to control motor 10 and open return valve
9, opposing steam flow to the shaft seal steam main pipe 4 in axle envelope return tube 8 carries out steam supply, ensures that steam supply is stablized, steam is effectively prevent to arrange
Enter air.
Claims (3)
1. a kind of steam heat-exchanging recovery system of steam turbine oil sealing, including steam turbine（1）With shaft seal steam main pipe（4）, the vapour
Turbine（1）The preceding axle envelope that rear ends are installed respectively（2）And rear shaft seal（3）, the preceding axle envelope（2）And rear shaft seal（3）Pass through respectively
Branched pipe and the shaft seal steam main pipe（4）Connection, and the rear shaft seal（3）Branched pipe be equipped with manograph（5）, feature exists
In：The steam turbine（1）Lower part is connected with low-pressure pumping steam pipe（6）, the low-pressure pumping steam pipe（6）End is connected with low-pressure heater
（7）；The low-pressure heater（7）Top is connected with axle envelope return tube（8）, the axle envelope return tube（8）It is equipped with return valve（9）,
And end and the shaft seal steam main pipe（4）Connection；The return valve（9）It is connected with motor（10）, the motor（10）It is logical
Cross wire connection controller（11）；The controller（11）Connect pressure regulator（12）, the pressure regulator（12）By conducting wire with it is described
Manograph（5）Connection.
2. a kind of steam heat-exchanging recovery system of steam turbine oil sealing according to claim 1, it is characterised in that：The low pressure
Heater（7）Return water condenser is dredged in bottom connection（13）, and the low-pressure heater（7）Lower part is equipped with condensed water water inlet pipe（14）,
Upper part is equipped with condensed water outlet pipe（15）.
3. a kind of steam heat-exchanging recovery system of steam turbine oil sealing according to claim 2, it is characterised in that：The condensation
Water water inlet pipe（14）With condensed water outlet pipe（15）Be oppositely arranged, and respectively with the thin return water condenser（13）Connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721901907.0U CN207960693U (en) | 2017-12-29 | 2017-12-29 | A kind of steam heat-exchanging recovery system of steam turbine oil sealing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721901907.0U CN207960693U (en) | 2017-12-29 | 2017-12-29 | A kind of steam heat-exchanging recovery system of steam turbine oil sealing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207960693U true CN207960693U (en) | 2018-10-12 |
Family
ID=63730897
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721901907.0U Active CN207960693U (en) | 2017-12-29 | 2017-12-29 | A kind of steam heat-exchanging recovery system of steam turbine oil sealing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207960693U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114575943A (en) * | 2022-03-30 | 2022-06-03 | 西安热工研究院有限公司 | Control system and method for shaft seal electric heater of shaft seal system of ultra-supercritical unit |
-
2017
- 2017-12-29 CN CN201721901907.0U patent/CN207960693U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114575943A (en) * | 2022-03-30 | 2022-06-03 | 西安热工研究院有限公司 | Control system and method for shaft seal electric heater of shaft seal system of ultra-supercritical unit |
| CN114575943B (en) * | 2022-03-30 | 2024-03-12 | 西安热工研究院有限公司 | Shaft seal electric heater control system and method for shaft seal system of ultra-supercritical unit |
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