CN210829873U - Shaft seal cooling system of water-cooled centrifugal pump - Google Patents
Shaft seal cooling system of water-cooled centrifugal pump Download PDFInfo
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- CN210829873U CN210829873U CN201920906567.3U CN201920906567U CN210829873U CN 210829873 U CN210829873 U CN 210829873U CN 201920906567 U CN201920906567 U CN 201920906567U CN 210829873 U CN210829873 U CN 210829873U
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Abstract
The utility model relates to a shaft seal cooling system of a water-cooling centrifugal pump, which comprises a mechanical seal cooling water tank, a demineralized water conveying pipeline, a compressed air conveying pipeline and an equipment cooling water conveying pipeline; the demineralized water conveying pipeline comprises a demineralized water loop and a demineralized water supply pipeline; the demineralized water loop is connected with the centrifugal pump and the mechanical seal cooling water tank; one end of the demineralized water supply pipeline is connected with a demineralized water source, and the other end of the demineralized water supply pipeline is connected to the demineralized water loop; one end of the compressed air conveying pipeline is connected with a compressed air source, and the other end of the compressed air conveying pipeline is connected with the mechanical seal cooling water tank; the equipment cooling water conveying pipeline is connected with the mechanical seal cooling water tank so as to cool the desalted water in the mechanical seal cooling water tank. The utility model has the advantages as follows: the utility model discloses a bearing seal cooling system of water-cooling type centrifugal pump has avoided the bearing seal and the equipment cooling water return circuit direct contact of pump, has avoided the radioactivity of the waste liquid that the centrifugal pump carried to other systematic diffusion.
Description
Technical Field
The utility model relates to a bearing seal cooling system field of centrifugal pump, in particular to bearing seal cooling system of water-cooling type centrifugal pump.
Background
With the vigorous development of the national nuclear power industry and the increasing importance on environmental protection, the pace of building a conventional thermal power station is being slowed down continuously, and nuclear energy is gradually valued by various circles as a new energy source. At present, in an operating nuclear power station, a radioactive waste liquid is treated by adopting an evaporation and concentration method, and a forced circulation pump in an evaporation unit is an important component of the radioactive waste liquid. The forced circulation pump belongs to a centrifugal pump, the power of the equipment is high, the heat dissipation capacity is high during operation, if the equipment is overheated, the operation stop of an evaporation unit can be caused, and even the leakage of radioactive waste liquid can be caused. To eliminate this potential safety hazard, the shaft seal of the forced circulation pump needs to be cooled. Considering that the waste liquid conveyed in the forced circulation pump contains radioactivity, if the shaft seal of the pump is directly cooled by equipment cooling water, radioactive substances can be diffused into the equipment cooling water loop. And because the pump needs long-time continuous operation, if the shaft seal of the pump is cooled by adopting direct-current demineralized water, the flow of the reused demineralized water is very large, and the amount of radioactive waste liquid generated by the operation of the nuclear power station is greatly increased. Therefore, the development of the shaft seal cooling system which has a simple structure, generates a small amount of radioactive waste liquid and effectively prevents the diffusion of radioactive substances has great significance for the safe and efficient operation of the nuclear power plant.
SUMMERY OF THE UTILITY MODEL
To the defect that exists among the prior art, the utility model aims to provide a bearing seal cooling system of water-cooling type centrifugal pump realizes on the basis of safe high-efficient cooling, produces the minimizing of radioactive waste liquid volume and prevents the diffusion of radioactive substance.
The technical scheme of the utility model as follows:
a shaft seal cooling system of a water-cooled centrifugal pump comprises a mechanical seal cooling water tank, a demineralized water conveying pipeline, a compressed air conveying pipeline and an equipment cooling water conveying pipeline;
the demineralized water conveying pipeline comprises a demineralized water loop and a demineralized water supply pipeline; the demineralized water loop is connected with the centrifugal pump and the mechanical seal cooling water tank; one end of the demineralized water supply pipeline is connected with a demineralized water source, and the other end of the demineralized water supply pipeline is connected to the demineralized water loop;
one end of the compressed air conveying pipeline is connected with a compressed air source, and the other end of the compressed air conveying pipeline is connected with the mechanical seal cooling water tank;
the equipment cooling water conveying pipeline is connected with the mechanical seal cooling water tank so as to cool the desalted water in the mechanical seal cooling water tank.
Further, in the shaft seal cooling system of the water-cooling centrifugal pump, the compressed air delivery pipeline is provided with a flow regulating valve.
Further, in the shaft seal cooling system of the water-cooling centrifugal pump, an in-situ temperature measuring instrument is arranged on the demineralized water loop.
Further, in the shaft seal cooling system of the water-cooling centrifugal pump, an impeller type visual flow indicator is arranged on the demineralized water supply pipeline; a window is arranged on the mechanical sealing water tank.
Further, in the shaft seal cooling system of the water-cooling centrifugal pump, an isolation valve is arranged on the demineralized water supply pipeline.
Further, in the shaft seal cooling system of the water-cooling centrifugal pump, a temperature test instrument is arranged on the demineralized water loop.
Further, in the shaft seal cooling system of the water-cooling centrifugal pump, the mechanical seal cooling water tank is provided with an in-situ pressure measuring instrument; and an in-situ pressure measuring instrument is arranged on the desalted water supply pipeline.
Furthermore, the shaft seal cooling system of the water-cooling centrifugal pump is provided with a check valve (9) and a check valve (7) on the compressed air conveying pipeline and the demineralized water supply pipeline respectively.
Further, in the shaft seal cooling system of the water-cooling centrifugal pump, the equipment cooling water conveying pipeline is provided with a flow regulating valve, a temperature test instrument and a pressure test instrument.
Further, in the shaft seal cooling system of the water-cooling type centrifugal pump, a spring is arranged below a bracket of the centrifugal pump to compensate expansion in a pipeline of the centrifugal pump.
The utility model has the advantages as follows:
1. the utility model discloses a bearing seal cooling system of water-cooling type centrifugal pump has avoided the bearing seal and the equipment cooling water return circuit direct contact of pump, has avoided the radioactivity of pending waste liquid to other systematic diffusion.
2. The demineralized water pipeline is a closed loop, the demineralized water is used as a cooling medium to be efficiently utilized, and the amount of radioactive waste liquid generated in the operation process of the evaporation unit is reduced.
3. The system pipeline is provided with an on-site pressure test instrument and an on-site temperature test instrument, and the system pipeline is combined with two flow regulating valves respectively arranged on the compressed air pipeline and the equipment cooling water pipeline, so that the pressure of a water tank in the system and the temperature of demineralized water can be monitored and controlled in real time, and the functions of good cooling effect and controllable cooling effect are realized.
4. The compressed air conveying pipeline and the demineralized water conveying pipeline of the system are provided with check valves, so that the demineralized water in the system is effectively prevented from flowing back into the compressed air supply system and the demineralized water supply system.
5. The spring mounted under the bracket of the centrifugal pump compensates for expansion in the centrifugal pump piping.
6. The whole system is easy to operate, and simultaneously achieves the purposes of safely and efficiently cooling, minimizing the amount of the generated radioactive waste liquid and preventing the radioactive substances from diffusing.
Drawings
Fig. 1 is a block diagram of a shaft seal cooling system of the water-cooling centrifugal pump of the present invention.
In the above drawings, 1, a centrifugal pump; 2. mechanically sealing the cooling water tank; 3. a compressed air delivery line; 4. a demineralized water delivery line; 5. a device cooling water delivery line; 6. a visual flow indicator; 7. a check valve; 8. a flow regulating valve; 9. a check valve; 10. a flow regulating valve; 11. an isolation valve; 12. a window; 13. an in-situ temperature measuring instrument; 14. a temperature test instrument; 15. an in situ pressure gauge; 16. a temperature test instrument; 17. a pressure test meter; 18. an in situ pressure gauge.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and examples.
As shown in figure 1, the utility model provides a shaft seal cooling system of water-cooling type centrifugal pump, including mechanical seal cooling trough 2, demineralized water conveying pipeline 4, compressed air conveying pipeline 3 and equipment cooling water conveying pipeline 5.
The demineralized water conveying pipeline 4 comprises a demineralized water loop and a demineralized water supply pipeline; the demineralized water loop connects the centrifugal pump 1 and the mechanical seal cooling water tank 2. The mechanically sealed cooling water tank 2 has an effective volume of 0.005m3The tank body; the demineralized water loop is communicated with the demineralized water in the tank body. One end of the demineralized water supply pipeline is connected with a demineralized water source, and the other end of the demineralized water supply pipeline is connected to the demineralized water loop. An in-situ temperature measuring instrument 13 is arranged on the demineralized water loop. An impeller type visual flow indicator 6 is arranged on the demineralized water supply pipeline; a window 12 is arranged on the mechanical sealing water tank. The visual flow indicator 6 in combination with the window 12 allows direct monitoring of the level of the mechanically sealed cooling water bath 2. When it shows that the mechanically sealed cooling water tank 2 is full, the system is isolated from the demineralized water supply system by an isolation valve 11 provided at the inlet of the pipeline. The upstream of the pipeline is provided with a check valve 7, which effectively prevents the reverse flow of the demineralized water into the demineralized water supply system. When the local pressure measuring instrument 15 arranged on the demineralized water conveying pipeline 4 displays an upstream incoming water pressure abnormity, the connection between the system and the demineralized water supply system can be cut off through the isolation valve 11. The pipeline is provided with an in-situ temperature measuring instrument 13 for monitoring the temperature of the desalted water in the system in real time. Meanwhile, a temperature test instrument 14 is arranged on the pipeline for use in system maintenance and debugging. Combined with demineralized water pipelineThe temperature of the desalted water of the system shown by the upper on-site temperature measuring instrument 13 can effectively regulate and control the temperature reduction capability of the system through the flow regulating valve 10 arranged on the pipeline.
The mechanically sealed cooling water bath 2 is provided with an in-situ pressure gauge 18 to ensure that the water pressure within the bath is stable. And an in-situ pressure measuring instrument 15 is arranged on the desalted water supply pipeline. The mechanical seal cooling water tank 2 is provided with a compressed air inlet N1, an equipment cooling water inlet N2, an equipment cooling water outlet N3, a demineralized water inlet N4, a demineralized water outlet N5 and a pressure gauge nozzle N6 which are respectively connected with corresponding pipelines.
One end of the compressed air conveying pipeline 3 is connected with a compressed air source, and the other end of the compressed air conveying pipeline is connected with the mechanical seal cooling water tank 2 through a compressed air inlet N1 so as to convey air into the tank to maintain a certain pressure. The compressed air delivery line 3 is provided with a flow regulating valve 8 which, in combination with an in-situ pressure measuring instrument 18 on the mechanically sealed cooling water tank 2, regulates the pressure in the tank to avoid the formation of water hammer. The compressed air delivery line 3 is provided with a check valve 9 to prevent the desalted water in the system from flowing back into the compressed air supply system.
The equipment cooling water delivery pipe 5 is connected to the mechanically sealed cooling water tank 2 to cool the demineralized water inside the mechanically sealed cooling water tank 2. In this embodiment, the coil pipe links to each other with equipment cooling water system, makes equipment cooling water and the abundant heat transfer of demineralized water in the basin.
In this embodiment, the compressed air delivery line 3 and the demineralized water supply line are respectively provided with a check valve 9 and a check valve 7. And the equipment cooling water conveying pipeline 5 is provided with a flow regulating valve 10, a temperature test instrument 16 and a pressure test instrument 17. A spring is arranged under the bracket of the centrifugal pump 1 to compensate the expansion in the pipeline of the centrifugal pump.
The utility model discloses a bearing seal cooling system of water-cooling type centrifugal pump has avoided the bearing seal and the equipment cooling water return circuit direct contact of pump, has avoided the radioactivity of pending waste liquid to other systematic diffusion. The demineralized water pipeline is a closed loop, the demineralized water is used as a cooling medium to be efficiently utilized, and the amount of radioactive waste liquid generated in the operation process of the evaporation unit is reduced. The system pipeline is provided with an on-site pressure test instrument and an on-site temperature test instrument, and the system pipeline is combined with two flow regulating valves respectively arranged on the compressed air pipeline and the equipment cooling water pipeline, so that the pressure of a water tank in the system and the temperature of demineralized water can be monitored and controlled in real time, and the functions of good cooling effect and controllable cooling effect are realized. The compressed air conveying pipeline 3 and the demineralized water conveying pipeline 4 of the system are provided with check valves, so that the demineralized water in the system is effectively prevented from flowing back into the compressed air supply system and the demineralized water supply system. The springs mounted under the bracket of the centrifugal pump 1 compensate for the expansion in the centrifugal pump piping. The whole system is easy to operate, and simultaneously achieves the purposes of safely and efficiently cooling, minimizing the amount of the generated radioactive waste liquid and preventing the radioactive substances from diffusing.
It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to encompass such modifications and variations.
Claims (10)
1. The utility model provides a shaft seal cooling system of water-cooling type centrifugal pump which characterized in that: comprises a mechanical seal cooling water tank (2), a demineralized water conveying pipeline (4), a compressed air conveying pipeline (3) and an equipment cooling water conveying pipeline (5);
the demineralized water conveying pipeline (4) comprises a demineralized water loop and a demineralized water supply pipeline; the demineralized water loop is connected with a centrifugal pump (1) and the mechanical seal cooling water tank (2); one end of the demineralized water supply pipeline is connected with a demineralized water source, and the other end of the demineralized water supply pipeline is connected to the demineralized water loop;
one end of the compressed air conveying pipeline (3) is connected with a compressed air source, and the other end of the compressed air conveying pipeline is connected with the mechanical seal cooling water tank (2);
the equipment cooling water conveying pipeline (5) is connected with the mechanical seal cooling water tank (2) to cool the demineralized water in the mechanical seal cooling water tank (2).
2. The shaft seal cooling system of the water-cooling type centrifugal pump according to claim 1, characterized in that: and a flow regulating valve is arranged on the compressed air conveying pipeline (3).
3. The shaft seal cooling system of the water-cooling type centrifugal pump according to claim 1, characterized in that: and an on-site temperature measuring instrument (13) is arranged on the demineralized water loop.
4. The shaft seal cooling system of the water-cooling type centrifugal pump according to claim 1, characterized in that: an impeller type visual flow indicator (6) is arranged on the demineralized water supply pipeline; a window (12) is arranged on the mechanical seal cooling water tank (2).
5. The shaft seal cooling system of the water-cooling type centrifugal pump according to claim 4, characterized in that: an isolating valve (11) is arranged on the demineralized water supply pipeline.
6. The shaft seal cooling system of the water-cooling type centrifugal pump according to claim 4, characterized in that: and a temperature test instrument is arranged on the demineralized water loop.
7. The shaft seal cooling system of the water-cooling type centrifugal pump according to claim 1, characterized in that: the mechanical seal cooling water tank (2) is provided with an in-situ pressure measuring instrument; and an in-situ pressure measuring instrument is arranged on the desalted water supply pipeline.
8. The shaft seal cooling system of the water-cooling type centrifugal pump according to claim 1, characterized in that: the compressed air conveying pipeline (3) and the desalted water supply pipeline are respectively provided with a check valve.
9. The shaft seal cooling system of the water-cooling type centrifugal pump according to claim 1, characterized in that: and the equipment cooling water conveying pipeline (5) is provided with a flow regulating valve, a temperature test instrument and a pressure test instrument (17).
10. The shaft seal cooling system of the water-cooling type centrifugal pump according to any one of claims 1 to 9, characterized in that: and a spring is arranged below the bracket of the centrifugal pump (1) to compensate expansion in a pipeline of the centrifugal pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920906567.3U CN210829873U (en) | 2019-06-17 | 2019-06-17 | Shaft seal cooling system of water-cooled centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920906567.3U CN210829873U (en) | 2019-06-17 | 2019-06-17 | Shaft seal cooling system of water-cooled centrifugal pump |
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| Publication Number | Publication Date |
|---|---|
| CN210829873U true CN210829873U (en) | 2020-06-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920906567.3U Active CN210829873U (en) | 2019-06-17 | 2019-06-17 | Shaft seal cooling system of water-cooled centrifugal pump |
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| CN (1) | CN210829873U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114753942A (en) * | 2022-04-15 | 2022-07-15 | 山东钢铁集团日照有限公司 | Toxic and harmful medium pump mechanical seal cooling water circulating cooling device and cooling method |
-
2019
- 2019-06-17 CN CN201920906567.3U patent/CN210829873U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114753942A (en) * | 2022-04-15 | 2022-07-15 | 山东钢铁集团日照有限公司 | Toxic and harmful medium pump mechanical seal cooling water circulating cooling device and cooling method |
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