CN217176895U - Pump filling system of underground tank discharge pump - Google Patents
Pump filling system of underground tank discharge pump Download PDFInfo
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- CN217176895U CN217176895U CN202220445574.XU CN202220445574U CN217176895U CN 217176895 U CN217176895 U CN 217176895U CN 202220445574 U CN202220445574 U CN 202220445574U CN 217176895 U CN217176895 U CN 217176895U
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Abstract
The utility model relates to the technical field of petrochemical industry, in particular to a pump priming system of an underground tank discharge pump, which comprises an underground tank and a centrifugal pump arranged above the underground tank, wherein one end of a pump inlet pipe connected with the centrifugal pump is arranged inside the underground tank, and a pump outlet pipe of the centrifugal pump is connected with the outside; the centrifugal pump is connected with a vacuum pump through a pipeline, a gas-liquid separation tank is connected behind the vacuum pump, a return pipe is connected below the gas-liquid separation tank, the other end of the return pipe is arranged inside the underground tank, a condensing device is connected above the gas-liquid separation tank through a connecting pipe, a U-shaped pipe connected to the condensing device is arranged on the side wall of the gas-liquid separation tank, and an air outlet pipe is connected above the condensing device. The utility model has simple operation, and can fill the pump inlet pipe quickly by utilizing the negative pressure principle without influencing the pump; meanwhile, underground operation is not needed, and the working safety of workers is guaranteed.
Description
Technical Field
The utility model relates to a petrochemical technical field, concretely relates to pump priming system of underground tank discharge pump.
Background
In the field of dangerous chemicals such as oil refining, chemical industry, in order to guarantee that the system can completely discharge materials, underground tanks lower than the water level are often designed. The underground tank is designed to ensure that the underground tank is at the lowest point, so that the underground tank is convenient for collecting materials of all pipelines and equipment. In order to pump out materials in underground tanks in the current market, centrifugal pumps and submerged pumps are mostly used. Although the cost of the submerged pump is lower, the submerged pump not only needs more manpower but also is inconvenient to maintain because the service life of the bearing is short and the submerged pump is positioned right above the tank; the centrifugal pump is arranged underground, so that the operation of personnel is inconvenient, the centrifugal pump belongs to underground limited space, and safety accidents can be caused if toxic gases and the like are gathered; if the centrifugal pump is installed above the ground, how to quickly and safely discharge the gas in the inlet pipeline of the pump when the pump is started becomes a problem to be solved at present.
SUMMERY OF THE UTILITY MODEL
For solving the not enough of prior art existence, the utility model provides a pump priming system of underground tank discharge pump.
In order to achieve the above purpose, the technical scheme of the utility model is that: a pump priming system of an underground tank discharge pump comprises an underground tank and a centrifugal pump arranged above the underground tank, wherein one end of a pump inlet pipe connected with the centrifugal pump is arranged inside the underground tank, and a pump outlet pipe of the centrifugal pump is connected with the outside; the centrifugal pump is connected with a vacuum pump through a pipeline, a gas-liquid separation tank is connected behind the vacuum pump, a return pipe is connected below the gas-liquid separation tank, the other end of the return pipe is arranged inside the underground tank, the upper part of the gas-liquid separation tank is connected to a pipe pass in a condensing device through a connecting pipe, and a U-shaped pipe connected to the pipe pass of the condensing device is arranged on the side wall of the gas-liquid separation tank; and an air outlet pipe is connected above the tube side of the condensing device and is connected with a tail gas purification system.
Furthermore, a control valve is arranged on a pipeline connecting the centrifugal pump and the vacuum pump.
Further, the power gas of the vacuum pump is nitrogen.
Further, a liquid level meter is arranged on one side of the gas-liquid separation tank.
Further, a connecting valve is arranged on the return pipe.
Further, a flame arrester is arranged on the air outlet pipe.
Further, the tail gas purification system is an incineration or flare system.
The utility model discloses the beneficial effect who reaches does:
1. the utility model has simple operation, reasonable design and wide application range, and can quickly fill the pump inlet pipe by utilizing the negative pressure principle without influencing the pump; meanwhile, the U-shaped water seal is utilized to ensure that the volatile gas phase caused by pump filling is recovered to the maximum extent, and the pump can be started in the shortest time.
2. The utility model relates to an adopt the mode of pump on the ground, need not carry out the underground operation, guaranteed staff's work safety, reduced and repaiied the pump and caused the consumption of manpower and material resources.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
The notation in the figure is: 1. an underground tank; 2. a pump inlet tube; 3. a centrifugal pump; 4. a pump outlet pipe; 5. a vacuum pump; 6. a gas-liquid separation tank; 7. a liquid level meter; 8. a return pipe; 9. a connecting pipe; 10. a U-shaped pipe; 11. a condensing unit; 12. an air outlet pipe; 13. a flame arrestor; 14. a control valve; 15. and connecting a valve.
Detailed Description
In order to better understand the purpose, structure and function of the present invention, the following description is made in detail with reference to the accompanying drawings.
As shown in figure 1, the pump priming system of underground tank discharge pump includes underground tank 1 and sets up centrifugal pump 3 above underground tank 1, underground tank 1 with be connected with pump inlet pipe 2 between the centrifugal pump 3, the centrifugal pump 3 other end is connected with pump outlet pipe 4, 3 backs of centrifugal pump are provided with vacuum pump 5, vacuum pump 5 through the pipe connection to in the pump chamber of centrifugal pump 3, be provided with control valve 14 on the pipeline, vacuum pump 5 uses nitrogen gas as the power gas. The vacuum pump 5 is connected with a gas-liquid separation tank 6 in the back, a liquid level meter 7 is arranged on one side of the gas-liquid separation tank 6, the liquid level meter 7 is used for displaying the height of liquid level in the gas-liquid separation tank 6, a return pipe 8 is connected to the lower portion of the gas-liquid separation tank 6, the other end of the return pipe 8 is connected to the underground tank 1, and a connecting valve 15 is arranged on the return pipe 8 and used for controlling the on-off of the return pipe 8. The upper end of the gas-liquid separation tank 6 is connected with a condensing device 11 through a connecting pipe 9, the connecting pipe 9 is connected with a pipe pass inside the condensing device 11, a U-shaped pipe 10 is connected to the side wall of the gas-liquid separation tank 6, and the other end of the U-shaped pipe 10 is connected to a pipe pass at the lower end of the right side inside the condensing device 11. And ethylene glycol refrigerating fluid is introduced into a shell pass inlet at the lower left of the condensing device 11, and flows out from a shell pass outlet at the upper right of the condensing device 11 to cool the condensing device 11. An outlet pipe 12 is connected above the tube side of the condensing device 11, the other end of the outlet pipe 12 is connected with an incineration or torch system, and a flame arrester 13 is arranged on the outlet pipe 12.
The utility model discloses the during operation starts to use nitrogen gas as power gas vacuum pump 5, vacuum pump 5 will the gas extraction in the 3 pump chambeies of centrifugal pump makes in the 3 pump chambeies of centrifugal pump form the negative pressure, the material in the underground tank 1 passes through under the effect of atmospheric pressure pump inlet tube 2 gets into in the centrifugal pump 3, the material of centrifugal pump 3 is in under vacuum pump 5's the drive, along vacuum pump 5 with pipeline between the gas-liquid separation jar 6 gets into in the gas-liquid separation jar 6, 6 one side of gas-liquid separation jar 7 readings of level gauge begin to increase, work as when 7 reading acceleration rates of level gauge maintain stably and the liquid level rises very fast, explain gas in the centrifugal pump 3 has discharged totally. At this time, the control valve 14 between the vacuum pump 5 and the centrifugal pump 3 is closed, the centrifugal pump 3 is started, and the material in the underground tank 1 is discharged to the outside through the pump outlet pipe 4; meanwhile, a connecting valve 15 on the return pipe 8 is opened, materials in the gas-liquid separation tank 6 return to the underground tank 1 through the return pipe 8, a little of materials in the gas-liquid separation tank are vaporized, gas pumped out of a pump cavity of the centrifugal pump 3 enters a pipe pass in the condensing device 11 through the connecting pipe 9, glycol refrigerating fluid is introduced into a shell pass inlet at the lower left of the condensing device 11 and flows out of a shell pass outlet at the upper right of the condensing device 11, the vaporized materials in the condensing device 11 are re-liquefied by the glycol refrigerating fluid, and the liquefied materials flow back to the gas-liquid separation tank 6 through the U-shaped pipe 10. And other gases in the condensing device 11 flow out through the gas outlet pipe 12 arranged above the tube side of the condensing device 11 and enter an incineration or torch system for environment-friendly treatment.
It is to be understood that the present invention has been described with reference to certain embodiments, and that various changes or equivalents may be substituted for elements thereof by those skilled in the art without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application are intended to be covered by the present invention.
Claims (7)
1. A pump priming system of an underground tank discharge pump comprises an underground tank (1) and a centrifugal pump (3) arranged above the underground tank (1), wherein one end of a pump inlet pipe (2) connected with the centrifugal pump (3) is arranged inside the underground tank (1), and a pump outlet pipe (4) of the centrifugal pump (3) is connected with the outside; the method is characterized in that: the centrifugal pump (3) is connected with a vacuum pump (5) through a pipeline, a gas-liquid separation tank (6) is connected behind the vacuum pump (5), a return pipe (8) is connected below the gas-liquid separation tank (6), the other end of the return pipe (8) is arranged inside the underground tank (1), the upper part of the gas-liquid separation tank (6) is connected to a pipe pass in a condensing device (11) through a connecting pipe (9), and a U-shaped pipe (10) connected to the pipe pass of the condensing device (11) is arranged on the side wall of the gas-liquid separation tank (6); an air outlet pipe (12) is connected above the tube side of the condensing device (11), and the air outlet pipe (12) is connected with a tail gas purification system.
2. The pump priming system of claim 1, wherein: and a control valve (14) is arranged on a pipeline connecting the centrifugal pump (3) and the vacuum pump (5).
3. The pump priming system of claim 1, wherein: and the power gas of the vacuum pump (5) is nitrogen.
4. The pump priming system of claim 1, wherein: and a liquid level meter (7) is arranged on one side of the gas-liquid separation tank (6).
5. The pump priming system of claim 1, wherein: the return pipe (8) is provided with a connecting valve (15).
6. The pump priming system of claim 1, wherein: and a flame arrester (13) is arranged on the air outlet pipe (12).
7. The pump priming system of claim 1, wherein: the tail gas purification system is an incineration or flare system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220445574.XU CN217176895U (en) | 2022-03-03 | 2022-03-03 | Pump filling system of underground tank discharge pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220445574.XU CN217176895U (en) | 2022-03-03 | 2022-03-03 | Pump filling system of underground tank discharge pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217176895U true CN217176895U (en) | 2022-08-12 |
Family
ID=82743994
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220445574.XU Active CN217176895U (en) | 2022-03-03 | 2022-03-03 | Pump filling system of underground tank discharge pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217176895U (en) |
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2022
- 2022-03-03 CN CN202220445574.XU patent/CN217176895U/en active Active
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