CN210686301U - Roots vacuum pump system with drainage and discharge functions - Google Patents
Roots vacuum pump system with drainage and discharge functions Download PDFInfo
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- CN210686301U CN210686301U CN201921924349.9U CN201921924349U CN210686301U CN 210686301 U CN210686301 U CN 210686301U CN 201921924349 U CN201921924349 U CN 201921924349U CN 210686301 U CN210686301 U CN 210686301U
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Abstract
The utility model relates to the technical field of a turbine vacuum pumping system, in particular to a Roots vacuum pump system with drainage and discharge, which comprises a condenser connected with a turbine, the condenser is connected with a first-level Roots vacuum pump through a vacuum main pipe, a vacuum main pipe manual valve and a vacuum main pipe pneumatic valve are sequentially arranged on the vacuum main pipe, the vacuum main pipe between the vacuum main pipe manual valve and the vacuum main pipe pneumatic valve is connected with a drain tank through a water guide pipe, a water inlet valve is fixed on the water guide pipe, an emptying valve is fixed above the drain tank, a sewage discharge door is arranged below the drain tank, the primary Roots vacuum pump is connected with a primary tubular heat exchanger through a conduit, the primary tubular heat exchanger is connected with a secondary Roots vacuum pump through a conduit, the second-stage Roots vacuum pump is connected with the second-stage tubular heat exchanger through a conduit, and the second-stage tubular heat exchanger is connected with the second-stage Roots vacuum pump through another conduit. The problem of ponding in the vacuum mother pipe can thoroughly be solved through this device.
Description
[ technical field ] A method for producing a semiconductor device
The utility model relates to a steam turbine vacuum pumping system technical field especially relates to a take roots vacuum pump system of hydrophobic emission.
[ background of the invention ]
Roots-water circulation vacuum pump set. Namely, a set of roots vacuum pump set is additionally arranged under the condition of keeping the original water ring pump, the water ring pump is used for pumping vacuum when the unit is started, and the water ring pump is stopped and the roots vacuum pump is started to maintain the vacuum of the condenser after the condition is reached. The working process of the Roots vacuum pump set is that non-condensable gas in a condenser is subjected to pressure boosting through a Roots vacuum pump, then enters a cooler for cooling, and a cooled steam-water mixture is pumped out through a water circulation vacuum pump and enters a steam-water separator. In the whole system structure, the roots vacuum pump acts as a compressor, and the root purpose of the roots pump is to boost the pressure of the non-condensed gas, so that the water vapor in the non-condensed gas can be cooled into liquid in the cooler, thereby greatly reducing the suction flow of the water circulation vacuum pump. On the other hand, the steam pressure after being boosted by the roots pump is increased, and the corresponding saturation temperature is increased, so that the temperature of the working water of the vacuum pump is relatively low, and the purpose of reducing the temperature of the working water of the vacuum pump is achieved.
The condenser is used for changing the steam discharged after the work of the steam turbine into condensed water, and higher vacuum is formed at the steam outlet of the steam turbine, so that the steam is expanded to the lowest pressure in the steam turbine, the available enthalpy drop of the steam in the steam turbine is increased, and the circulating heat efficiency is improved.
This system is longer because condenser to roots pump steam pumping pipeline, steam condenses into the water storage in the pipeline at the shutdown in-process, when the roots vacuum pump system is started in normal operating after the unit starts, the condensate water on pipeline leads to roots pump operation process resistance too big in getting into the roots pump, the condensate water that roots pump impeller extrusion got into, the too big easy iron-clad oil blanket that makes of pressure gets into bearing grease chamber, cause roots pump vibration big when causing lubricating oil emulsification, the bearing, faults such as gear wear, and because the load is big, rotor and casing difference in temperature constantly increase, make the continuous increase in clearance, this can make the first increase against the current, arouse roots vacuum pump drawing speed to descend.
The utility model discloses it is not enough to solve prior art and research and propose.
[ Utility model ] content
The utility model aims at overcoming above-mentioned prior art's shortcoming, providing a take roots vacuum pump system of hydrophobic emission, thoroughly solve steam extraction pipeline ponding and cause the water intaking of lobe pump bearing grease chamber and other trouble, make it satisfy unit operation requirement.
The utility model discloses can realize through following technical scheme:
the utility model discloses a roots vacuum pump system with drainage and discharge, which comprises a condenser connected with a steam turbine, wherein the condenser is connected with a first-level roots vacuum pump through a vacuum main pipe, the vacuum main pipe is sequentially provided with a vacuum main pipe manual valve and a vacuum main pipe pneumatic valve, the vacuum main pipe between the vacuum main pipe manual valve and the vacuum main pipe pneumatic valve is connected with a drainage tank through a water guide pipe, the water guide pipe is fixed with a water inlet valve, an emptying valve is fixed above the drainage tank, a drain door is arranged below the drainage tank, the first-level roots vacuum pump is connected with a first-level tubular heat exchanger through a pipe, the first-level tubular heat exchanger is connected with a second-level roots vacuum pump through a pipe, the second-level roots vacuum pump is connected with a second-level roots vacuum pump through another pipe, the second-level roots vacuum pump is connected with a water circulation vacuum pump through a pipe, the water circulation vacuum pump is connected with a steam-water separator through a pipe, a gas discharge port is fixed above the steam-water separator, a liquid discharge port is arranged below the steam-water separator, the steam-water separator is connected with a plate heat exchanger through a pipe, and the plate heat exchanger is connected with a cooling water system through a pipe. Before the condenser is vacuumized, a vacuum main pipe pneumatic valve on a vacuum main pipe is closed, a drain tank bottom blow-down valve and a drain tank drain valve are closed, a water inlet valve on the drain tank is opened, water in the vacuum main pipe is drained into the drain tank, after accumulated water in the vacuum main pipe is drained completely, the water inlet valve on the drain tank is closed, an emptying valve on the drain tank and the drain tank bottom blow-down valve are opened to drain water under the condition that the vacuum system is good in tightness, a manual valve of the vacuum main pipe and the vacuum main pipe pneumatic valve are opened, non-condensable vapor in a condenser is pumped and compressed by a primary roots vacuum pump and then drained into a primary tubular heat exchanger for cooling, a cooled vapor-water mixture is drained into a secondary roots vacuum pump for compression, the compressed vapor-water mixture is drained into a secondary tubular heat exchanger for cooling, and the cooled vapor-water mixture is drained into a vapor-water separator for vapor-water separation by a water circulation vacuum pump, the separated gas is discharged through a gas discharge port, and the separated liquid is discharged through a liquid discharge port.
Preferably, the plate heat exchanger is connected with the water circulation vacuum pump through a conduit. The water temperature of the water circulation vacuum pump has a large influence on the performance, the optimal working temperature is 15 ℃, cold water in a cooling water system passes through the plate heat exchanger and then exchanges heat with high-temperature water flowing into the plate heat exchanger through the steam-water separator, the temperature of the high-temperature water is reduced, the water with the reduced temperature is discharged into the water circulation vacuum pump, the water with the reduced temperature is mixed with water discharged into the water circulation vacuum pump by the second-stage roots vacuum pump, the temperature in the water circulation vacuum pump is reduced, otherwise, the water temperature is too high, the vaporization phenomenon in the pump body of the water circulation vacuum pump is easily caused, and the normal operation of the water circulation vacuum pump is influenced.
Preferably, a thermometer is fixed on a conduit between the plate heat exchanger and the water circulation vacuum pump. The temperature of the water discharged from the plate heat exchanger into the water circulating vacuum pump was confirmed by a thermometer.
Preferably, the primary tubular heat exchanger and the secondary tubular heat exchanger are both connected with a cooling water system through a conduit. The cooling water in the cooling water system exchanges heat with the high-temperature mixture inside the first-stage tubular heat exchanger and the second-stage tubular heat exchanger, the temperature of the mixture inside the first-stage tubular heat exchanger and the second-stage tubular heat exchanger is reduced, and the service life of the first-stage Roots vacuum pump and the service life of the second-stage Roots vacuum pump are prevented from being influenced by overhigh temperature.
Compared with the prior art, the utility model has the advantages that:
1. the problem of ponding in the vacuum mother pipe can thoroughly be solved through this device.
2. Before the condenser is vacuumized, the vacuum main pipe pneumatic valve on the vacuum main pipe is closed, the drain tank bottom blowdown door and the drain tank evacuation door are closed, the water inlet valve on the drain tank is opened, water in the vacuum main pipe is drained into the drain tank, and accumulated water in the vacuum main pipe can be effectively discharged.
[ description of the drawings ]
The following detailed description of embodiments of the present invention is provided with reference to the accompanying drawings, in which:
fig. 1 is a schematic structural view of the present invention;
in the figure: 1. a condenser; 2. a vacuum main pipe manual valve; 3. a vacuum main pipe pneumatic valve; 4. a drain tank; 5. an evacuation valve; 6. a water inlet valve; 7. a sewage draining door; 8. a first-stage Roots vacuum pump; 9. a primary tubular heat exchanger; 10. a second-stage Roots vacuum pump; 11. a two-stage tubular heat exchanger; 12. a water circulation vacuum pump; 13. a steam-water separator; 14. a plate heat exchanger;
[ detailed description ] embodiments
The following detailed description of embodiments of the present invention is made with reference to the accompanying drawings:
as shown in figure 1, the utility model discloses a Roots vacuum pump system with drainage, which comprises a condenser 1 connected with a steam turbine (not shown), the condenser 1 is connected with a first-level Roots vacuum pump 8 through a vacuum main pipe, a vacuum main pipe manual valve 2 and a vacuum main pipe pneumatic valve 3 are arranged at two ends of the vacuum main pipe in sequence, the vacuum main pipe between the vacuum main pipe manual valve 2 and the vacuum main pipe pneumatic valve 3 is connected with a drain tank 4 through a water guide pipe, a water inlet valve 6 is fixed on the water guide pipe, an emptying valve 5 is fixed above the drain tank 4, a blow-off valve 7 is arranged below the drain tank 4, the first-level Roots vacuum pump 8 is connected with a first-level tubular heat exchanger 9 through a conduit, the first-level Roots tubular heat exchanger 9 is connected with a second-level vacuum pump 10 through a conduit, the second-level Roots vacuum pump 10 is connected with a second-level, the two-stage Roots vacuum pump 10 is connected with a water circulation vacuum pump 12 through a conduit, the water circulation vacuum pump 12 is connected with a steam-water separator 13 through a conduit, a gas discharge port is fixed above the steam-water separator 13, a liquid discharge port is arranged below the steam-water separator 13, the steam-water separator 13 is connected with a plate heat exchanger 14 through a conduit, and the plate heat exchanger 14 is connected with a cooling water system through a conduit. Before the condenser is vacuumized, a vacuum main pipe pneumatic valve 3 on a vacuum main pipe is closed, a drain valve 7 at the bottom of a drain tank 4 and a drain valve of the drain tank 4 are closed, a water inlet valve 6 on the drain tank 4 is opened, water in the vacuum main pipe is drained into the drain tank 4, after the water accumulated in the vacuum main pipe is drained completely, the water inlet valve 6 on the drain tank 4 is closed, the drain valve 5 on the drain tank 4 and the drain valve 7 at the bottom of the drain tank 4 are opened to drain the water under the condition that the vacuum system is good in tightness, a vacuum main pipe manual valve 2 and the vacuum main pipe pneumatic valve 3 are opened, non-condensable steam in a condenser 1 is pumped and compressed through a primary roots vacuum pump 8 and then drained into a primary tubular heat exchanger 9 for cooling, the cooled steam-water mixture is drained into a secondary roots vacuum pump 10 for compression, the compressed steam-water mixture is drained into a secondary tubular heat exchanger 11 for cooling, and the cooled steam-water mixture is drained into a steam separator 13 through a water circulation vacuum pump 12 The separated gas is discharged through a gas discharge port, and the separated liquid is discharged through a liquid discharge port.
Wherein the plate heat exchanger 14 is connected to the water circulating vacuum pump 12 through a conduit. The water temperature of the water circulation vacuum pump 12 has a great influence on the performance, the optimal working temperature is 15 ℃, cold water in a cooling water system passes through the plate heat exchanger 14 and then exchanges heat with high-temperature water flowing into the plate heat exchanger 14 from the steam-water separator 13, the temperature of the high-temperature water is reduced, the water with the reduced temperature is discharged into the water circulation vacuum pump 12, the water with the reduced temperature is mixed with the water discharged into the water circulation vacuum pump 12 from the second-stage roots vacuum pump 10, the temperature in the water circulation vacuum pump 12 is reduced, otherwise, the water temperature is too high, the vaporization phenomenon in the pump body of the water circulation vacuum pump 12 is easily caused, and the normal operation of the water circulation vacuum pump 12 is.
Wherein a thermometer is fixed on the conduit between the plate heat exchanger 14 and the water circulating vacuum pump 12. The temperature of the water discharged from the plate heat exchanger 14 into the water circulating vacuum pump 12 was confirmed by a thermometer.
Wherein, the first-stage tubular heat exchanger 9 and the second-stage tubular heat exchanger 11 are both connected with a cooling water system through a conduit. The cooling water in the cooling water system exchanges heat with the high-temperature mixture inside the first-stage tubular heat exchanger 9 and the second-stage tubular heat exchanger 11, the temperature of the mixture inside the first-stage tubular heat exchanger 9 and the second-stage tubular heat exchanger 11 is reduced, and the service life of the first-stage Roots vacuum pump 8 and the service life of the second-stage Roots vacuum pump 10 are prevented from being influenced by overhigh temperature.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, many changes, modifications, substitutions and variations can be made to the embodiments without departing from the technical principles of the present invention, and these changes, modifications, substitutions and variations should also be considered as the protection scope of the present invention.
Claims (4)
1. The utility model provides a take roots vacuum pump system of hydrophobic emission, contains the condenser, its characterized in that: the condenser is connected with a primary Roots vacuum pump through a vacuum main pipe, a vacuum main pipe manual valve and a vacuum main pipe pneumatic valve are sequentially arranged on the vacuum main pipe, the vacuum main pipe between the vacuum main pipe manual valve and the vacuum main pipe pneumatic valve is connected with a drain tank through a water guide pipe, a water inlet valve is fixed on the water guide pipe, an evacuation valve is fixed above the drain tank, a drain door is arranged below the drain tank, the primary Roots vacuum pump is connected with a primary tubular heat exchanger through a guide pipe, the primary tubular heat exchanger is connected with a secondary Roots vacuum pump through a guide pipe, the secondary Roots vacuum pump is connected with a secondary tubular heat exchanger through a guide pipe, the secondary Roots vacuum pump is connected with a secondary Roots vacuum pump through another guide pipe, the secondary Roots vacuum pump is connected with a water circulation vacuum pump through a guide pipe, a gas discharge port is fixed above the steam-water separator, a liquid discharge port is arranged below the steam-water separator, the steam-water separator is connected with the plate heat exchanger through a pipe, and the plate heat exchanger is connected with a cooling water system through a pipe.
2. The roots vacuum pump system with hydrophobic drainage of claim 1, wherein: the plate heat exchanger is connected with the water circulation vacuum pump through a conduit.
3. The roots vacuum pump system with hydrophobic drainage of claim 2, wherein: and a thermometer is fixed on a guide pipe between the plate heat exchanger and the water circulation vacuum pump.
4. The roots vacuum pump system with hydrophobic drainage of claim 1, wherein: and the primary tubular heat exchanger and the secondary tubular heat exchanger are both connected with a cooling water system through a conduit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921924349.9U CN210686301U (en) | 2019-11-09 | 2019-11-09 | Roots vacuum pump system with drainage and discharge functions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921924349.9U CN210686301U (en) | 2019-11-09 | 2019-11-09 | Roots vacuum pump system with drainage and discharge functions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210686301U true CN210686301U (en) | 2020-06-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921924349.9U Active CN210686301U (en) | 2019-11-09 | 2019-11-09 | Roots vacuum pump system with drainage and discharge functions |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210686301U (en) |
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2019
- 2019-11-09 CN CN201921924349.9U patent/CN210686301U/en active Active
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Address after: Maodian Town, Ganxian District, Ganzhou City, Jiangxi Province Patentee after: Huaneng Qinmei Ruijin Power Generation Co., Ltd Address before: Maodian Town, Ganxian County, Ganzhou City, Jiangxi Province Patentee before: HUANENG RUIJIN POWER GENERATION Co.,Ltd. |