CN214170629U - Optimization device of large-machine shaft seal system heating pipe - Google Patents
Optimization device of large-machine shaft seal system heating pipe Download PDFInfo
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- CN214170629U CN214170629U CN202023079181.1U CN202023079181U CN214170629U CN 214170629 U CN214170629 U CN 214170629U CN 202023079181 U CN202023079181 U CN 202023079181U CN 214170629 U CN214170629 U CN 214170629U
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Abstract
The utility model relates to an optimization device of big machine shaft seal system heating coil belongs to the technical field of unit shaft seal system. The steam supply main pipe between the steam supply main valve and the main shaft seal is also sequentially provided with a temperature and pressure reducing device, an electric heater and an adjusting valve; still include the heat recovery unit, the heat recovery unit includes main road drain pipe, motorised valve, check valve and low temperature heater, main road drain pipe one end intercommunication supplies the female pipe of vapour to be located the pipeline section between electric heater and governing valve, and the other end and low temperature heater intercommunication, motorised valve and check valve setting are on main road drain pipe and communicate in order. The utility model provides a shaft seal system of prior art have the extravagant scheduling problem of energy.
Description
Technical Field
The utility model relates to an optimization device of big machine shaft seal system heating coil belongs to the technical field of unit shaft seal system.
Background
The shaft seal steam supply system can meet the starting requirements of various states, the shaft seal steam supply parameters can meet the requirements of manufacturers, the temperature of a shaft seal steam supply main pipe can have the superheat degree of more than 14 ℃, in order to ensure the superheat degree of a standby steam source of a main pipe of a shaft seal, improve the reliability, prevent the steam source temperature from being too low, cause the dynamic and static collision and friction of the shaft seal of a steam turbine and cause the vibration of a unit to cause a large trip event, a bypass drain pipe is usually arranged in a front pipeline of a steam supply pressure regulating valve of the shaft seal, and introduces steam into the condenser, a large amount of steam enters the condenser to cause waste of working medium energy, and because the bypass drain pipe is provided with a manual valve, manual adjustment is needed, the adjustment time is slow, because the auxiliary steam temperature changes greatly according to the load of the unit, if manual adjustment is not timely, the requirement that the steam temperature of the shaft seal does not meet the metal temperature of the current load shaft seal easily appears, and the potential safety hazard that cold steam enters the shaft seal of the large unit exists.
The patent document with the prior art application number of CN201820966082.9 discloses a shaft seal system for improving starting efficiency, including auxiliary steam main pipe and condenser, the output of auxiliary steam main pipe communicates the input of condenser, still includes at least one bypass drain pipe and at least one hydrophobic flash tank, and the one end of bypass drain pipe is linked together with auxiliary steam main pipe, and the other end and the hydrophobic flash tank of bypass drain pipe communicate.
Above-mentioned reference example and prior art's bearing seal system have the extravagant scheduling problem of energy, consequently, the utility model provides an optimizing device of big quick-witted bearing seal system warm tube is used for solving above-mentioned problem.
SUMMERY OF THE UTILITY MODEL
In order to overcome the energy waste and other shortcomings of the existing shaft seal system, the utility model discloses an optimization device of a large-size shaft seal system heating pipe, the utility model discloses the availability factor is high, can reduce the waste of the energy, and the reaction is rapid, the adjustment is fast simultaneously.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
an optimization device of a heating pipe of a large-engine shaft seal system comprises an auxiliary header, a steam supply main pipe, a steam supply main valve and a main engine shaft seal, wherein the output end of the auxiliary header is communicated with the input end of the main engine shaft seal through the steam supply main pipe; still include the heat recovery unit, the heat recovery unit includes main road drain pipe, motorised valve, check valve and low temperature heater, main road drain pipe one end intercommunication supplies the female pipe of vapour to be located the pipeline section between electric heater and governing valve, and the other end and low temperature heater intercommunication, motorised valve and check valve setting are on main road drain pipe and communicate in order.
And a first stop valve is arranged at a pipe section between the temperature and pressure reducing device and the steam supply main valve on the steam supply main pipe.
And a rear filter screen is arranged at a pipe section between the electric heater and the heat recovery unit on the steam supply main pipe.
And a front manual valve and a rear manual valve are respectively arranged on pipe sections on the front side and the rear side of the regulating valve on the steam supply main pipe.
The steam supply main pipe is also provided with a first branch pipe and a second branch pipe respectively, and two ends of the first branch pipe are connected to pipe sections between a rear filter screen and a front manual valve on the steam supply main pipe and between a rear manual valve and a main machine shaft seal respectively; two ends of the second branch pipe are respectively connected to pipe sections between a steam supply main valve and the first stop valve on the steam supply main pipe and between the electric heater and the rear filter screen; and the first branch pipe and the second branch pipe are both provided with normally closed valves.
The electric heater and the rear filter screen are both provided with bypass drain pipes, the bypass drain pipes are respectively connected with the electric heater or the rear filter screen and the trench, and the bypass drain pipes are both provided with normally closed valves.
Still be provided with the drainage unit on the main road drain pipe, the drainage unit includes bypass drain pipe, second stop valve and pneumatic valve, bypass drain pipe one end intercommunication main road drain pipe is located the pipeline section between supplying main pipe of vapour and the motorised valve, and the trench is connected to the other end, second stop valve and pneumatic valve set up on the bypass drain pipe and communicate in order.
Compared with the prior art the utility model discloses there are following characteristics and beneficial effect: the electric valve is arranged on the main path bypass drain pipe, and the electric valve can realize quick corresponding and quick adjustment;
the utility model leads the redundant steam to the low-temperature heater through the main path bypass drain pipe, the redundant steam can enter the low-temperature heater to heat the condensed water, the water temperature of the deaerator is improved, the heat efficiency of the unit is improved, and the energy loss is reduced;
the utility model discloses be provided with the pneumatic valve on drainage cell's the bypass drain pipe, when discovering that the unsatisfied regulation of bearing seal vapour source superheat degree, and need supply vapour to big shaft seal, should open this pneumatic door immediately, improve the bearing seal admission temperature fast, reach the requirement of steam superheat degree.
Drawings
Fig. 1 is a schematic view of the connection relationship of the present invention.
Wherein the reference numerals are: 1. an auxiliary header; 2. a steam supply main pipe; 3. a main steam supply valve; 4. a temperature and pressure reducer; 5. a first shut-off valve; 6. an electric heater; 7. a rear filter screen; 8. a front manual valve; 9. adjusting a valve; 10. a rear manual valve; 11. main machine shaft seal; 12. a source of condensed water; 13. normally closing the valve; 14. a drainage unit; 15. a second stop valve; 16. a pneumatic valve; 17. a heat recovery unit; 18. an electrically operated valve; 19. a non-return valve; 20. a low temperature heater; 21. a first branch pipe; 22. a bypass drain pipe; 23. a trench; 24. a main path drain pipe; 25. a second branch pipe.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
As shown in fig. 1, the optimizing apparatus for a heating pipe of a large-size shaft seal system according to this embodiment includes an auxiliary header 1, a steam supply main pipe 2, a steam supply main valve 3 and a main shaft seal 11, an output end of the auxiliary header 1 is communicated with an input end of the main shaft seal 11 through the steam supply main pipe 2, the steam supply main valve 3 is disposed on the steam supply main pipe 2, a temperature and pressure reducing device 4, an electric heater 6 and an adjusting valve 9 are further sequentially disposed on the steam supply main pipe 2 between the steam supply main valve 3 and the main shaft seal 11, and the temperature and pressure reducing device 4, the electric heater 6 and the adjusting valve 9 are sequentially communicated on the steam supply main pipe 2; still include heat recovery unit 17, heat recovery unit 17 includes main way drain pipe 24, motorised valve 18, check valve 19 and low temperature heater 20, and main way drain pipe 24 one end intercommunication supplies the main pipe 2 of vapour to be located the pipeline section between electric heater 6 and governing valve 9, and the other end and low temperature heater 20 intercommunication, motorised valve 18 and check valve 19 set up on main way drain pipe 24 and communicate in order.
Further, a first stop valve 5 is arranged on a pipe section between the temperature and pressure reducing device 4 and the steam supply main valve 3 on the steam supply main pipe 2.
Further, a rear filter screen 7 is arranged on the steam supply main pipe 2 between the electric heater 6 and the heat recovery unit 17.
Furthermore, a front manual valve 8 and a rear manual valve 10 are respectively arranged on pipe sections on the front side and the rear side of the regulating valve 9 on the steam supply main pipe 2.
Furthermore, the steam supply main pipe 2 is also provided with a first branch pipe 21 and a second branch pipe 25 respectively, and two ends of the first branch pipe 21 are connected to pipe sections on the steam supply main pipe 2 between the rear filter screen 7 and the front manual valve 8 and between the rear manual valve 10 and the main shaft seal 11 respectively; two ends of the second branch pipe 25 are respectively connected with the pipe sections between the steam supply main valve 3 and the first stop valve 5 on the steam supply main pipe 2 and between the electric heater 6 and the rear filter screen 7; the first branch pipe 21 and the second branch pipe 25 are each provided with a normally-closed valve 13.
Furthermore, bypass drain pipes 22 are arranged on the electric heater 6 and the rear filter screen 7, the bypass drain pipes 22 are respectively communicated with the electric heater 6 or the rear filter screen 7 and a trench 23, and normally-closed valves 13 are arranged on the bypass drain pipes 22.
Further, still be provided with drainage unit 14 on main drain pipe 24, drainage unit 14 includes bypass drain pipe 22, second stop valve 15 and pneumatic valve 16, and bypass drain pipe 22 one end intercommunication main drain pipe 24 is located the pipeline section between steam supply main pipe 2 and the motorised valve 18, and trench 23 is connected to the other end, and second stop valve 15 and pneumatic valve 16 set up on bypass drain pipe 22 and communicate in order.
The utility model discloses a theory of operation:
the steam flow direction of the auxiliary steam header 1 when the steam is stable and normal is as follows: when the load of a large engine is lower, and the steam leakage of the shaft seal of the high-pressure cylinder cannot meet the requirement of the steam supply and self sealing of the shaft seal of the low-pressure cylinder, the shaft seal supplies steam for standby to supply steam to the shaft seal of the large engine, and the steam sequentially passes through the auxiliary header 1, the steam supply main pipe 2, the temperature and pressure reducing device 4, the electric heater 6, the rear filter screen 7 and the regulating valve 9 to meet the requirement of a steam source of the shaft seal. The electric valve 18 is slightly opened, and part of steam enters the low-temperature heater 20;
the steam flow direction when the steam temperature of the auxiliary steam header 1 is too low is as follows: when the steam temperature of the auxiliary steam header 1 is too low to meet the large-machine shaft seal temperature (280 ℃ -320 ℃), an electric heater 6 is used for heating the steam, and meanwhile, an electric valve 18 is opened to increase the steam temperature so as to meet the requirement of a shaft seal steam source;
steam flow when steam temperature is too high: when the steam temperature of the auxiliary steam header 1 is too high and cannot meet the requirement of the shaft seal temperature of a large unit (during the starting period of a common unit), the desuperheater 4 is used for cooling the steam, meanwhile, a large electric valve 18 is still required to be opened, the phenomenon of local water accumulation of a pipeline is reduced, and part of the steam is kept to enter a low-temperature heater 20;
the steam supply principle of the six-section steam extraction and standby shaft seal steam main pipe for draining water to the low-temperature heater 20 is as follows: the normal low-temperature heater 20 supplies steam by six-section steam extraction of the steam turbine to provide a steam source, the size of a pipeline is phi 820 x 9mm, and the rated pressure of six extraction is 0.26 Mpa. The other path of steam source is provided by a standby main path drain pipe 24, the size of the pipeline bypass drain pipe is phi 48 x 4mm, and the steam pressure is 0.5Mpa, so that the efficiency of the surface heater is improved, and the temperature of the condensate water is improved.
In the description of the present invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top", "inner", "front", "center", "both ends", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
In the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," "fixed," "screwed" and the like are to be construed broadly, e.g., as a fixed connection, a detachable connection, or an integral part; can be mechanically or electrically connected; the term "connected" may refer to a direct connection, an indirect connection through an intermediate, a connection between two elements or an interaction relationship between two elements, and unless otherwise specifically defined, the term should be understood as having a specific meaning in the present application by those skilled in the art.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides an optimizing apparatus of big quick-witted bearing seal system warm tube which characterized in that: the steam supply system comprises an auxiliary header (1), a steam supply main pipe (2), a steam supply main valve (3) and a main shaft seal (11), wherein the output end of the auxiliary header (1) is communicated with the input end of the main shaft seal (11) through the steam supply main pipe (2), the steam supply main valve (3) is arranged on the steam supply main pipe (2), a temperature and pressure reducing device (4), an electric heater (6) and an adjusting valve (9) are sequentially arranged on the steam supply main pipe (2) between the steam supply main valve (3) and the main shaft seal (11), and the temperature and pressure reducing device (4), the electric heater (6) and the adjusting valve (9) are sequentially communicated on the steam supply main pipe (2);
still include heat recovery unit (17), heat recovery unit (17) include main road drain pipe (24), motorised valve (18), check valve (19) and low temperature heating ware (20), main road drain pipe (24) one end intercommunication supplies female pipe of vapour (2) to be located the pipeline section between electric heating ware (6) and governing valve (9), and the other end and low temperature heating ware (20) intercommunication, motorised valve (18) and check valve (19) set up on main road drain pipe (24) and communicate in order.
2. The optimizing device for the warm pipe of the large shaft seal system according to claim 1, wherein: and a first stop valve (5) is arranged at the pipe section between the temperature and pressure reducing device (4) and the steam supply main valve (3) on the steam supply main pipe (2).
3. The optimizing device for the warm pipe of the large shaft seal system according to claim 1, wherein: and a rear filter screen (7) is arranged at a pipe section between the electric heater (6) and the heat recovery unit (17) on the steam supply main pipe (2).
4. The optimizing device for the warm pipe of the large shaft seal system according to claim 1, wherein: and a front manual valve (8) and a rear manual valve (10) are respectively arranged on pipe sections on the front side and the rear side of the regulating valve (9) on the steam supply main pipe (2).
5. The optimizing device for the warm pipe of the large shaft seal system according to claim 1, wherein: the steam supply main pipe (2) is also provided with a first branch pipe (21) and a second branch pipe (25) respectively, and two ends of the first branch pipe (21) are connected to pipe sections between a rear filter screen (7) and a front manual valve (8) on the steam supply main pipe (2) and between a rear manual valve (10) and a main machine shaft seal (11) respectively; two ends of the second branch pipe (25) are respectively connected to pipe sections between the steam supply main valve (3) and the first stop valve (5) on the steam supply main pipe (2) and between the electric heater (6) and the rear filter screen (7); and normally-closed valves (13) are arranged on the first branch pipe (21) and the second branch pipe (25).
6. The optimizing device for the warm pipe of the large shaft seal system according to claim 3, wherein: the electric heater (6) and the rear filter screen (7) are both provided with bypass drain pipes (22), the bypass drain pipes (22) are respectively communicated with the electric heater (6) or the rear filter screen (7) and a trench (23), and the bypass drain pipes (22) are both provided with normally-closed valves (13).
7. The optimizing device for the warm pipe of the large shaft seal system according to claim 1, wherein: still be provided with drainage unit (14) on main way drain pipe (24), drainage unit (14) include bypass drain pipe (22), second stop valve (15) and pneumatic valve (16), bypass drain pipe (22) one end intercommunication main way drain pipe (24) are located the pipeline section between supplying main pipe (2) and motorised valve (18), and trench (23) are connected to the other end, second stop valve (15) and pneumatic valve (16) set up on bypass drain pipe (22) and communicate in order.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023079181.1U CN214170629U (en) | 2020-12-17 | 2020-12-17 | Optimization device of large-machine shaft seal system heating pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023079181.1U CN214170629U (en) | 2020-12-17 | 2020-12-17 | Optimization device of large-machine shaft seal system heating pipe |
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| Publication Number | Publication Date |
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| CN214170629U true CN214170629U (en) | 2021-09-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023079181.1U Active CN214170629U (en) | 2020-12-17 | 2020-12-17 | Optimization device of large-machine shaft seal system heating pipe |
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| CN (1) | CN214170629U (en) |
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- 2020-12-17 CN CN202023079181.1U patent/CN214170629U/en active Active
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