CN218624340U - Steam turbine shaft seal leakage recovery device - Google Patents
Steam turbine shaft seal leakage recovery device Download PDFInfo
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- CN218624340U CN218624340U CN202222657208.3U CN202222657208U CN218624340U CN 218624340 U CN218624340 U CN 218624340U CN 202222657208 U CN202222657208 U CN 202222657208U CN 218624340 U CN218624340 U CN 218624340U
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Abstract
The utility model relates to the field of steam turbines, and provides a steam turbine shaft seal air leakage recovery device, which comprises a heat supply network heater, a steam header, a shaft seal heater and a steam turbine; the steam turbine is provided with a front air seal primary air leakage pipeline interface, a front air seal secondary air leakage pipeline interface, an exhaust pipeline interface and a rear air seal shaft seal air leakage pipeline interface; the utility model discloses a connect the third recovery pipeline, switch on the third recovery pipeline drain pipe, first drain valve of series connection on drain pipe, the second drain valve, first DN100 valve of series connection on the second recovery pipeline, second DN100 valve of series connection on the third recovery pipeline, guarantee steam turbine steady operation, the outer air leakage of bearing seal around having reduced the turbine unit, improved and got into the bearing room because of the condensation of outer leakage steam and cause the lubricating oil quality problem of worsening, steam turbine efficiency has been increased, will leak steam and heat supply network heater connection outward through the reposition of redundant personnel pipeline, heat supply network heater water supply temperature has been improved, improve the economic nature of operation, energy saving and emission reduction has been realized.
Description
Technical Field
The utility model relates to a steam turbine field especially indicates a steam turbine bearing seal recovery unit that leaks gas.
Background
The outer air leakage of the front shaft seal and the rear shaft seal in the existing steam turbine is large, and the oil quality of lubricating oil is deteriorated when the outer leakage steam enters the bearing chamber after being condensed, so that the phenomenon of unstable operation of the steam turbine in the operation process is caused.
SUMMERY OF THE UTILITY MODEL
The utility model provides a steam turbine bearing seal gas leakage recovery unit, through connecting third recovery pipeline, switch on the third recovery pipeline drain pipe simultaneously, first drain valve of series connection and second drain valve on drain pipe, first DN100 valve of series connection on the second recovery pipeline, second DN100 valve of series connection on the third recovery pipeline, steam turbine can the steady operation has been guaranteed, effectively reduced the outer tolerance that leaks of steam turbine unit front and back bearing seal, it causes the lubricating oil quality deterioration problem to have improved because of outer leakage steam condensation gets into the bearing room, the efficiency of steam turbine has been increased, will leak steam and heat supply network heater connection outward through the reposition of redundant personnel pipeline, the water supply temperature of heat supply network heater has been improved, thereby the economic nature of operation has been improved, energy saving and emission reduction's purpose has been reached.
The technical scheme of the utility model is realized like this:
a steam turbine shaft seal leakage recovery device comprises: the system comprises a heat supply network heater, a deaerator, a steam header, a shaft seal heater and a steam turbine;
the steam turbine is provided with a front air seal primary air leakage pipeline interface, a front air seal secondary air leakage pipeline interface, an exhaust pipeline interface and a rear air seal shaft seal air leakage pipeline interface;
the front air seal primary air leakage pipeline is connected with a first recovery pipeline through a connector, the first recovery pipeline is communicated with a second recovery pipeline, the exhaust pipeline connector is communicated with an exhaust pipeline, the second recovery pipeline is communicated with an air outlet pipeline after being mixed with the exhaust pipeline, and the air outlet pipeline is communicated with the steam header;
the front air seal secondary air leakage pipeline interface is communicated with a first air leakage pipeline, the rear air seal shaft seal air leakage pipeline is communicated with a second air leakage pipeline, the first air leakage pipeline and the second air leakage pipeline are mixed and then communicated with a third air leakage pipeline, and the third air leakage pipeline is communicated with the shaft seal heater;
the shaft seal heater is communicated with a low-level water tank through a shaft and a drainage pipeline;
the deaerator is communicated with the low-level water tank;
the first recovery pipeline is also communicated with a third recovery pipeline, the heat supply network heater is communicated with an air pump exhaust main pipe, and the third recovery pipeline is communicated with the air pump exhaust main pipe;
a drain pipeline is communicated with the third recovery pipeline;
the drain pipeline is provided with a first drain valve and a second drain valve.
Further, a first DN100 valve is connected in series on the second recovery pipeline.
Further, a second DN100 valve is connected in series on the third recovery pipeline.
Further, the first recovery pipeline, the second recovery pipeline, the third recovery pipeline and the first gas leakage pipeline are DN100 pipelines.
Further, the second air leakage pipeline and the third air leakage pipeline are DN150 pipelines.
Further, the exhaust pipeline is a DN450 pipeline.
Further, the drain pipe is a DN25 drain pipe.
Further, the air pump exhaust main pipe is a DN250 pipeline.
Further, the steam turbine shown is a back pressure steam turbine.
Furthermore, a low-level water pump is arranged on a water outlet pipeline of the low-level water tank, and an emptying valve is arranged at the top of the shaft seal heater.
The utility model discloses a connect the third recovery pipeline, switch on the drain pipe on the third recovery pipeline simultaneously, first drain valve of series connection and second drain valve on the drain pipe, first DN100 valve of series connection on the second recovery pipeline, second DN100 valve of series connection on the third recovery pipeline, the steam turbine can steady operation has been guaranteed, effectively reduced the outer tolerance that leaks of shaft seal around the turbine unit, improved and got into the bearing room because of outer leakage steam condensation and cause the worsening problem of lubricating oil quality, the efficiency of steam turbine has been increased, will leak steam and heat supply network heater connection outward through the reposition of redundant personnel pipeline, the water supply temperature of heat supply network heater has been improved, thereby the economic nature of operation has been improved, energy saving and emission reduction's purpose has been reached.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic structural connection diagram of a steam turbine shaft seal leakage recovery device according to an embodiment of the present invention;
description of the reference numerals: a steam turbine 1; a first recovery pipe 101; a second recovery pipe 102; a first DN100 valve 1021; an exhaust duct 103; an outlet duct 104; a third recovery pipe 105; a second DN100 valve 1051; a hydrophobic conduit 106; first trap 1061; a second drain valve 1062; a first blow-by duct 107; a second blowby gas duct 108; a third blow-by duct 109; a front air seal primary air leakage pipeline interface 11; a front air seal secondary air leakage pipeline interface 12; an exhaust duct interface 13; a rear gas seal shaft seal leakage pipeline interface 14; a shaft seal heater 2; a drain pipe 21; an evacuation valve 22; a low-level water tank 3; a water outlet line 31; a low-level water pump 32; a deaerator 4; a steam header 5; a heating network heater 6.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.
In an embodiment of the present invention, see fig. 1, a steam turbine shaft seal leakage recovery device includes: the system comprises a heat supply network heater 6, a deaerator 4, a steam header 5, a low-level water tank 3, a shaft seal heater 2 and a steam turbine 1;
the steam turbine 1 is provided with a front air seal primary air leakage pipeline interface 11, a front air seal secondary air leakage pipeline interface 12, an exhaust pipeline interface 13 and a rear air seal shaft seal air leakage pipeline interface 14;
the front air seal primary air leakage pipeline interface 11 is connected with a first recovery pipeline 101, the first recovery pipeline 101 is communicated with a second recovery pipeline 102, the exhaust pipeline interface 13 is communicated with an exhaust pipeline 103, the second recovery pipeline 102 is communicated with an air outlet pipeline 104 after being mixed with the exhaust pipeline 103, and the air outlet pipeline 104 is communicated with the steam header 4;
the front air seal secondary air leakage pipeline interface 12 is communicated with a first air leakage pipeline 107, the rear air seal shaft seal air leakage pipeline 14 is communicated with a second air leakage pipeline 108, the first air leakage pipeline 107 and the second air leakage pipeline 108 are mixed and then communicated with a third air leakage pipeline 109, and the third air leakage pipeline 109 is communicated with the shaft seal heater 2;
the shaft seal heater 2 is communicated with a low-level water tank 3 through a shaft and drain pipeline 21;
the deaerator 4 is communicated with the low-level water tank 3;
the first recovery pipeline 101 is also communicated with a third recovery pipeline 105, the heat supply network heater 6 is communicated with an air pump exhaust main pipe 61, and the third recovery pipeline 105 is communicated with the air pump exhaust main pipe 61;
a drain pipe 106 is connected to the third recovery pipe 105;
the drain pipe 106 is provided with a first drain valve 1061 and a second drain valve 1062.
In the embodiment of the present invention, as shown in fig. 1, a first DN100 valve 1021 is connected in series to the second recovery pipe 102.
In the embodiment of the present invention, see fig. 1, a second DN100 valve 1051 is connected in series on the third recycling pipe 105, and the third recycling pipe is 20m long.
In the embodiment of the present invention, as shown in fig. 1, the drain pipe 106 is DN25 drain pipe, and the drain pipe has a length of 4m.
In the embodiment of the present invention, as shown in fig. 1, the first recovery pipeline 101, the second recovery pipeline 102, the third recovery pipeline 105 and the first gas leakage pipeline 107 are DN100 pipelines.
In an embodiment of the present invention, as shown in fig. 1, the second air leakage pipeline 108 and the third air leakage pipeline 109 are DN150 pipelines.
In the embodiment of the present invention, as shown in fig. 1, the exhaust duct 103 is a DN450 duct.
In the embodiment of the present invention, as shown in fig. 1, the air pump exhaust main pipe 61 is DN250 pipe.
In the embodiment of the present invention, see fig. 1, the steam turbine 1 is shown as a back pressure steam turbine.
In the embodiment of the present invention, as shown in fig. 1, the outlet pipe 31 of the low-level water tank 3 is provided with a low-level water pump 32, and the top of the shaft seal heater 2 is provided with an exhaust valve 22.
In the specific embodiment of the present invention, as shown in fig. 1, when the steam turbine is in operation, a proper gap needs to be left between the rotor and the cylinder therein to ensure that the rotor and the cylinder do not collide with each other, and if the installation gap is too large, and the installation gap is worn for a long time or the operation parameter changes, the air leakage of the shaft seal may increase, thereby increasing the pressure of the shaft seal;
generally, the axial thrust of the rotor refers to the direction of the generator, and the direction of the front shaft end sealing is opposite to the flow direction of steam in the cylinder; therefore, the axial thrust can be effectively reduced by the air leakage of the front air seal;
the original equipment is characterized in that the steam leakage of a front air seal primary air leakage pipeline interface of a steam turbine is communicated to an exhaust pipeline and then connected to a steam header (the pressure is 0.8 Mpa), the air leakage part of the section is discharged into an air pump exhaust main pipe (the pressure is 0.2 Mpa) after modification, the air leakage steam resistance of the front air seal and the air leakage pipeline interface is large after modification, and the air leakage resistance is reduced after modification, so that the axial thrust of a unit is reduced, the temperature of a thrust bush before modification is averagely 85 ℃, and the temperature is averagely reduced by about 10 ℃ after modification;
the air leakage of the shaft seal of the original equipment is large, so that steam from the air leakage of the front air seal primary air leakage pipeline interface to the shaft seal heater cannot be completely condensed and recovered for modification, and the front shaft seal emits air to cause heat loss; after the transformation, the leaked heat loss is reasonably recycled to the heat supply network heater of the air leakage recycling device, so that the safe operation of the unit is ensured while the energy is saved;
in the aspect of energy saving: increasing the steam recovery amount by 1t/h per hour, and increasing the water outlet temperature of a heat supply network heat exchanger (the water flow is 1000 t/h) by 1 ℃; after accounting, the heat saved in one heating season is about 14000 GJ; in the aspect of safety, the transformation reduces the pressure of the shaft seal of the unit; the problems of gasoline engine oil quality deterioration, working medium waste, equipment damage and the like caused by air bleeding of the shaft seal and water inflow in oil due to high pressure of the shaft seal are avoided;
the utility model discloses can be effectual around the reduction turbine unit the outer steam leakage volume of bearing seal, improve and get into the bearing room because of leaking the steam condensation outward and cause lubricating oil quality aggravation tendency, retrieve partial steam heat, improve heat supply network heater leaving water temperature, reduce except heat exchanger steam quantity, reduction production consumption makes the bearing seal pressure possess controllable condition simultaneously.
The above description is only for the preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A steam turbine shaft seal leakage recovery device comprises: the system comprises a heat supply network heater, a deaerator, a steam header, a shaft seal heater and a steam turbine;
the method is characterized in that: the steam turbine is provided with a front air seal primary air leakage pipeline interface, a front air seal secondary air leakage pipeline interface, an exhaust pipeline interface and a rear air seal shaft seal air leakage pipeline interface;
the front air seal primary air leakage pipeline is connected with a first recovery pipeline through a connector, the first recovery pipeline is communicated with a second recovery pipeline, the exhaust pipeline connector is communicated with an exhaust pipeline, the second recovery pipeline is communicated with an air outlet pipeline after being mixed with the exhaust pipeline, and the air outlet pipeline is communicated with the steam header;
the front air seal secondary air leakage pipeline interface is communicated with a first air leakage pipeline, the rear air seal shaft seal air leakage pipeline is communicated with a second air leakage pipeline, the first air leakage pipeline and the second air leakage pipeline are mixed and then communicated with a third air leakage pipeline, and the third air leakage pipeline is communicated with the shaft seal heater;
the shaft seal heater is communicated with a low-level water tank through a shaft and a drainage pipeline;
the deaerator is communicated with the low-level water tank;
the first recovery pipeline is also communicated with a third recovery pipeline, the heat supply network heater is communicated with an air pump exhaust main pipe, and the third recovery pipeline is communicated with the air pump exhaust main pipe;
a drain pipeline is communicated with the third recovery pipeline;
the drain pipeline is provided with a first drain valve and a second drain valve.
2. The steam turbine shaft seal leakage recovery device of claim 1, wherein: and a first DN100 valve is connected in series on the second recovery pipeline.
3. The steam turbine shaft seal leakage recovery device according to claim 1 or 2, wherein: and a second DN100 valve is connected in series on the third recovery pipeline.
4. The steam turbine shaft seal leakage recovery device of claim 1, wherein: the first recovery pipeline, the second recovery pipeline, the third recovery pipeline and the first air leakage pipeline are DN100 pipelines.
5. The steam turbine shaft seal leakage recovery device of claim 1, wherein: and the second air leakage pipeline and the third air leakage pipeline are DN150 pipelines.
6. The steam turbine shaft seal leakage recovery device of claim 1, wherein: the exhaust pipeline is a DN450 pipeline.
7. The steam turbine shaft seal leakage recovery device according to claim 1 or 4, wherein: the drain pipe is DN25 drain pipe.
8. The steam turbine shaft seal leakage recovery device of claim 1, wherein: the air pump exhaust main pipe is a DN250 pipeline.
9. The steam turbine shaft seal leakage recovery device of claim 1, wherein: the steam turbine shown is a back pressure steam turbine.
10. The steam turbine shaft seal leakage recovery device of claim 1, wherein: and a low-level water pump is arranged on a water outlet pipeline of the low-level water tank, and an exhaust valve is arranged at the top of the shaft seal heater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222657208.3U CN218624340U (en) | 2022-10-10 | 2022-10-10 | Steam turbine shaft seal leakage recovery device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222657208.3U CN218624340U (en) | 2022-10-10 | 2022-10-10 | Steam turbine shaft seal leakage recovery device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218624340U true CN218624340U (en) | 2023-03-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222657208.3U Active CN218624340U (en) | 2022-10-10 | 2022-10-10 | Steam turbine shaft seal leakage recovery device |
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|---|---|
| CN (1) | CN218624340U (en) |
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2022
- 2022-10-10 CN CN202222657208.3U patent/CN218624340U/en active Active
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