CN204663590U - A kind of turbine shaft seal water seal arrangement - Google Patents
A kind of turbine shaft seal water seal arrangement Download PDFInfo
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- CN204663590U CN204663590U CN201520248774.6U CN201520248774U CN204663590U CN 204663590 U CN204663590 U CN 204663590U CN 201520248774 U CN201520248774 U CN 201520248774U CN 204663590 U CN204663590 U CN 204663590U
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- shaft seal
- water
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- turbine
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Abstract
The utility model relates to the shaft seal induced draft fan of steam turbine generator, gland steam heater and water seal arrangement thereof.Above equipment belongs to the major component of turbine vacuum system; directly steam turbine vacuum will be destroyed once break down; cause the generation of stopping accident; this cover turbine shaft seal water seal arrangement can Control Shaft water shutoff stably envelope liquid level; both water seal water level fluctuation had been avoided on the impact of steam turbine; turn eliminate the phenomenon needing artificial frequent adjustment, guarantee that Turbine Safety runs, be applicable to turbine shaft seal sealing system.
Description
Technical field
The utility model relates to the shaft seal induced draft fan of steam turbine generator, gland steam heater and water seal arrangement thereof.Above equipment belongs to the major component of turbine vacuum system; directly steam turbine vacuum will be destroyed once break down; cause the generation of stopping accident; this cover turbine shaft seal water seal arrangement can Control Shaft water shutoff stably envelope liquid level; both water seal water level fluctuation had been avoided on the impact of steam turbine; turn eliminate the phenomenon needing artificial frequent adjustment, guarantee that Turbine Safety runs, be applicable to turbine shaft seal sealing system.
Background technique
The shaft seal seal water system of prior art Turbo-generator Set as shown in Figure 1, the high pressure shaft seal 1 of steam turbine and low pressure shaft seal 2 are extracted into gland steam heater 3 by shaft seal induced draft fan 4 and carry out heat exchange (raising condensing water temperature, reach energy-saving effect), incoagulable steam is discharged by shaft seal induced draft fan diffusion mouth 9, flow in shaft seal water seal 5 by the water of condensation after steam condensation by drain valve bottom gland steam heater 6 natural-drop in gland steam heater, after through shaft seal water seal drain valve 8, be back in hot well and carry out circulating in utilization, reach energy-conservation effect.
From runnability, the water level difficulty being carried out Control Shaft water shutoff envelope by shaft seal water seal drain valve is larger, this drain valve carrys out guaranteed water level by controlling its aperture size manually, and steam turbine generator belongs to cogeneration units, be in real time generated energy is adjusted according to the demand of steam pipe system, reach the object of equilibrium vapor pipe network.Therefore the instability that generation load can cause turbine shaft gland steam is increased and decreased frequently, and then cause shaft seal water seal water level fluctuations, must be regulated to scene by special messenger, under the prerequisite of current personnel shortage, often cause adjustment to affect the normal operation phenomenon of equipment not in time.
Case study: gland steam pressure is higher, gland steam amount will increase, and the water of condensation in gland steam heater 3 also will synchronously increase, and cause the water level in shaft seal water seal 5 to rise, now must open macro-axis water shutoff envelope drain valve 8 to reduce the water level of shaft seal water seal, keep water level balance.If but shaft seal water seal drain valve 8 regulates not in time, once the height that water level rises to shaft seal induced draft fan 4 will cause the phenomenon of shaft seal induced draft fan traffic overload and burn-down of electric motor; If there is this situation, bleeder steam device can only be leaned on to assist the operation bleeding to maintain shaft seal, cause air ejector efficiency to decline to a great extent, steam turbine generator is merely able to maintain underrun.
On the contrary, gland steam pressure is on the low side, and gland steam amount will reduce, water of condensation in gland steam heater 3 also will synchronously reduce, cause the water level decreasing in shaft seal water seal 5, now must turn down shaft seal water seal drain valve 8 to improve the water level of shaft seal water seal, keep water level balance.If but shaft seal water seal drain valve 8 regulates not in time, will cause shaft seal water seal lack of water and destroy vacuum, affects steam turbine and normally runs, once find that obtaining adjustment will cause the stopping accident caused because steam turbine vacuum destroys not in time.
Model utility content
In order to overcome above-mentioned technical problem; the purpose of this utility model is: can automatically Control Shaft water shutoff envelope device; increasing and decreasing load is carried out at steam turbine generator; automatic Control Shaft water shutoff water shutoff position when the fluctuation of gland steam amount; both unit safety operation was guaranteed, the phenomenon of adjusting axle water shutoff water shutoff position of must sending someone in real time under turn eliminating personnel shortage state.
To achieve these goals, the technical solution of the utility model is as follows:
A kind of turbine shaft seal water seal arrangement, comprise: steam turbine, wherein, the two ends of described steam turbine are respectively equipped with turbine high-pressure shaft seal and steam turbine low pressure shaft seal, described turbine high-pressure shaft seal is communicated with a gland steam heater by steam line with steam turbine low pressure shaft seal, described gland steam heater is communicated with a shaft seal induced draft fan by steam line, described steam turbine is also communicated with a condenser by condensing water conduit, described condenser is communicated with a hot well, described hot well respectively pump solidifying with is communicated with a shaft seal water seal, described solidifying pump is communicated with gland steam heater, described gland steam heater is communicated with boiler feed by condensing water conduit, described shaft seal water seal is communicated with by condensing water conduit with gland steam heater, shaft seal water seal is communicated with the condensing water conduit leading to boiler feed from gland steam heater, shaft seal water seal is also provided with shaft seal water seal spill pipe, the end of described shaft seal water seal spill pipe is shaft seal water seal flow-off, the below of described shaft seal water seal flow-off is provided with shaft seal water seal water of condensation reflow pipe.
Preferably, the condensing water conduit between described hot well and shaft seal water seal is provided with shaft seal water drain valve.
Preferably, described shaft seal water seal is also installed with high liquid level warning is spacing and low liquid level warning is spacing, described high liquid level warning is spacing and low liquid level warning is spacing is all communicated with a signal transmitting device.
Preferably, the condensing water conduit between described shaft seal water seal and gland steam heater is provided with drain valve bottom gland steam heater.
Preferably, shaft seal water water-feeding valve is provided with between described shaft seal water seal and the condensing water conduit leading to boiler feed from gland steam heater.
Preferably, described shaft seal induced draft fan is provided with shaft seal water seal diffusion mouth.
This practical turbine shaft seal water seal arrangement keeps water seal liquid level equilibrium automatically by increasing water seal spill pipe, eliminate existing equipment to send someone in real time the phenomenon carrying out to scene adjusting according to steam turbine actual operating mode, condensate utilization boiler drainage pump system has also carried out recycling simultaneously, also there is not the phenomenon of waste resource.
Accompanying drawing explanation
Fig. 1 is the structural representation of the turbine shaft seal water seal arrangement of prior art;
Fig. 2 is the structural representation of turbine shaft seal water seal arrangement of the present utility model;
Fig. 3 is the enlarged diagram of the utility model axis water shutoff envelope part-structure;
In figure: A, steam turbine; B, generator; 1, turbine high-pressure shaft seal; 2, steam turbine low pressure shaft seal; 3, gland steam heater; 4, shaft seal induced draft fan; 5, shaft seal water seal; 6, drain valve bottom gland steam heater; 7, shaft seal water seal water replenishing valve; 8, shaft seal water seal drain valve; 9, shaft seal water seal diffusion mouth; 10, hot well; 11, shaft seal water seal spill pipe; 12, shaft seal water seal flow-off; 13, shaft seal water seal condensate return pipe; 14, high liquid level warning is spacing; 15, low liquid level warning is spacing; 16, signal transmitting device; 17, solidifying pump; 18, steam line; 19, condensing water conduit; 20, condenser.
Embodiment
The structure of a kind of turbine shaft seal water seal arrangement that the utility model provides as shown in Figure 2, comprise: steam turbine A and generator B, wherein, the two ends of steam turbine A are respectively equipped with turbine high-pressure shaft seal 1 and steam turbine low pressure shaft seal 2, turbine high-pressure shaft seal 1 is communicated with a gland steam heater 3 by steam line 18 with steam turbine low pressure shaft seal 2, gland steam heater 3 is communicated with a shaft seal induced draft fan 4 by steam line 18, steam turbine A is also communicated with a condenser 20 by condensing water conduit 19, condenser 20 is communicated with a hot well 10, hot well 10 respectively pump 17 solidifying with is communicated with a shaft seal water seal 5, solidifying pump 17 is communicated with gland steam heater 3, gland steam heater 3 is communicated with (because boiler feed is prior art by condensing water conduit 19 with boiler feed, therefore not shown), shaft seal water seal 5 is communicated with by condensing water conduit 19 with gland steam heater 3, shaft seal water seal 5 is communicated with the condensing water conduit 19 leading to boiler feed from gland steam heater 3, shaft seal water seal 5 is also provided with shaft seal water seal spill pipe 11, the end of shaft seal water seal spill pipe 11 is shaft seal water seal flow-off 12, the below of shaft seal water seal flow-off 12 is provided with shaft seal water seal water of condensation reflow pipe 13, water of condensation in shaft seal water seal water of condensation reflow pipe 13 enters in boiler drain tank.Shaft seal water seal 5 is also installed with high liquid level warning spacing 14 and low liquid level warning spacing 15, high liquid level warning spacing 14 is all communicated with a signal transmitting device 16 with low liquid level warning spacing 15.
In one preferably mode of execution, the condensing water conduit 19 between hot well 10 and shaft seal water seal 5 is provided with shaft seal water drain valve 8.
In one preferably mode of execution, the condensing water conduit 19 between shaft seal water seal 5 and gland steam heater 3 is provided with drain valve 6 bottom gland steam heater.
In one preferably mode of execution, between shaft seal water seal 5 and the condensing water conduit 19 leading to boiler feed from gland steam heater 3, be provided with shaft seal water water-feeding valve 7.
In one preferably mode of execution, shaft seal induced draft fan 4 is provided with shaft seal water seal diffusion mouth 9.
Under steam turbine accidental conditions, the water of condensation that gland steam heater condenses into flows directly to boiler drain tank by shaft seal water seal arrangement and carries out recycling, beaten to boiler feed by drainage pump after flowing into shaft seal water seal.Hot well need not be got back to through shaft seal water seal drain valve again, get to boiler feed by condensate extractionpump.And the liquid level warning signal increased also can allow operator understand the unusual service condition of water level liquid level within the very first time.This device eliminates operator and shaft seal water seal drain valve need be utilized to regulate the step of water seal water level, has both alleviated the labor intensity of operator, turn eliminates all kinds of operation accidents because shaft seal water seal liquid level instability causes.
When before steam turbine operation, first closing axle water shutoff envelope drain valve, during normal operation, high pressure shaft seal and low pressure shaft seal are extracted into gland steam heater by shaft seal induced draft fan and carry out heat exchange, flow in shaft seal water seal by drain valve natural-drop bottom gland steam heater after condensing into water of condensation, when the condensation water level of shaft seal water seal runs up to 1500mm height, through shaft seal water seal spill pipe, flow out from shaft seal water seal flow-off, boiler drain tank (existing equipment) is flow to by shaft seal water seal condensate return pipe, beaten to boiler feed by boiler drainage pump (existing equipment) and carry out recycling.In order to ensure the normal level of water seal arrangement, the high liquid level warning increasing water seal liquid level at water seal 2500mm liquid level is spacing, highly increases low liquid level warning spacing, be aided with the warning device of signal transmitting device through original DCS system at water seal liquid level 500mm.When water seal liquid level rises to 2500mm position, the spacing shake-up of liquid level high liquid level warning, through signal transmitting device to the warning device of DCS system, sends water seal liquid level high alarm signal.Same when water seal liquid level drops to 500mm position, the spacing shake-up of low liquid level warning, through signal transmitting device to the warning device of DCS system, sends the low alarm signal of water seal liquid level.Thus convenient operation personnel are convenient and swift carries out execute-in-place and combustion adjustment.
In sum, be only preferred embodiment of the present utility model, not be used for limit the utility model implement scope, all equalizations of doing according to shape, structure, feature and the spirit described in the utility model right change and modify, and all should be included in right of the present utility model.
Claims (6)
1. a turbine shaft seal water seal arrangement, comprise: steam turbine, it is characterized in that, the two ends of described steam turbine are respectively equipped with turbine high-pressure shaft seal and steam turbine low pressure shaft seal, described turbine high-pressure shaft seal is communicated with a gland steam heater by steam line with steam turbine low pressure shaft seal, described gland steam heater is communicated with a shaft seal induced draft fan by steam line, described steam turbine is also communicated with a condenser by condensing water conduit, described condenser is communicated with a hot well, described hot well respectively pump solidifying with is communicated with a shaft seal water seal, described solidifying pump is communicated with gland steam heater, described gland steam heater is communicated with boiler feed by condensing water conduit, described shaft seal water seal is communicated with by condensing water conduit with gland steam heater, shaft seal water seal is communicated with the condensing water conduit leading to boiler feed from gland steam heater, shaft seal water seal is also provided with shaft seal water seal spill pipe, the end of described shaft seal water seal spill pipe is shaft seal water seal flow-off, the below of described shaft seal water seal flow-off is provided with shaft seal water seal water of condensation reflow pipe.
2. turbine shaft seal water seal arrangement as claimed in claim 1, it is characterized in that, the condensing water conduit between described hot well and shaft seal water seal is provided with shaft seal water drain valve.
3. turbine shaft seal water seal arrangement as claimed in claim 1, is characterized in that, described shaft seal water seal is also installed with high liquid level warning is spacing and low liquid level warning is spacing, and described high liquid level warning is spacing and low liquid level warning is spacing is all communicated with a signal transmitting device.
4. turbine shaft seal water seal arrangement as claimed in claim 1, it is characterized in that, the condensing water conduit between described shaft seal water seal and gland steam heater is provided with drain valve bottom gland steam heater.
5. turbine shaft seal water seal arrangement as claimed in claim 1, is characterized in that, be provided with shaft seal water water-feeding valve between described shaft seal water seal and the condensing water conduit leading to boiler feed from gland steam heater.
6. turbine shaft seal water seal arrangement as claimed in claim 1, it is characterized in that, described shaft seal induced draft fan is provided with shaft seal water seal diffusion mouth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520248774.6U CN204663590U (en) | 2015-04-22 | 2015-04-22 | A kind of turbine shaft seal water seal arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520248774.6U CN204663590U (en) | 2015-04-22 | 2015-04-22 | A kind of turbine shaft seal water seal arrangement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204663590U true CN204663590U (en) | 2015-09-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520248774.6U Expired - Fee Related CN204663590U (en) | 2015-04-22 | 2015-04-22 | A kind of turbine shaft seal water seal arrangement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204663590U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108915808A (en) * | 2018-07-20 | 2018-11-30 | 东南大学 | Double pressure back pressure turbine heating systems |
| CN109209881A (en) * | 2018-10-12 | 2019-01-15 | 大唐淮北发电厂 | Power Plant vacuum structure |
-
2015
- 2015-04-22 CN CN201520248774.6U patent/CN204663590U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108915808A (en) * | 2018-07-20 | 2018-11-30 | 东南大学 | Double pressure back pressure turbine heating systems |
| CN109209881A (en) * | 2018-10-12 | 2019-01-15 | 大唐淮北发电厂 | Power Plant vacuum structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150923 Termination date: 20170422 |