System for improving utilization rate of vacuum pump

Abstract

The system is characterized in that a refining tower is connected with a first vacuum pump and a second vacuum pump in parallel through a refining tower header pipe, a dealcoholization tower is connected with a third vacuum pump and a fourth vacuum pump in parallel through a dealcoholization tower header pipe, and the refining tower header pipe is connected with the dealcoholization tower header pipe through a communicating pipe; and isolating valves are respectively arranged at two ends of the communicating pipe. The device has the beneficial effects that (1) the vacuum pump system of the refining tower and the vacuum pump system of the dealcoholization tower are combined through the communicating pipe, and only one vacuum pump needs to be started to vacuumize originally, so that the utilization rate of the vacuum pumps can be improved, the energy can be saved, the power consumption can be saved by 110 kilowatt-hours after one vacuum pump runs, and the cost can be reduced; on the basis of 8000 hours per year, at least 700000 yuan can be saved; and (2) after the vacuum pump systems of the refining tower and the dealcoholization tower are combined through the communicating pipe, the shutdown probability caused by the damage of the vacuum pump can be reduced, and the loss caused by shutdown is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of ethylene glycol rectification, in particular to a system for improving the utilization rate of a vacuum pump. Background Art

[0002] In an EG rectification device, a de-alcoholization tower and a purification tower are negative-pressure rectification towers, and are evacuated by a de-alcoholization tower vacuum pump and a purification tower vacuum pump respectively. The vacuum systems of the two towers are completely independent, and are normally one running and one standby. However, the vacuum pump is relatively precise and easy to be damaged. When both the running vacuum pump and the standby pump are damaged, the vacuum of the de-alcoholization tower and the purification tower cannot be maintained, and the whole device can only be forced to stop, resulting in losses. Summary of the Invention

[0003] In view of the above problems in the prior art, the utility model provides a system for improving the utilization rate of a vacuum pump. The technical solution is as follows: the purification tower is connected in parallel with a first vacuum pump and a second vacuum pump through a purification tower main pipe, the de-alcoholization tower is connected in parallel with a third vacuum pump and a fourth vacuum pump through a de-alcoholization tower main pipe, the purification tower main pipe is connected with the de-alcoholization tower main pipe through a connecting pipe, and cut-off valves are respectively arranged at both ends of the connecting pipe.

[0004] As a preferred solution, a reducing pipe, a filter screen and a main pipe pressure gauge are sequentially arranged on the purification tower main pipe and the de-alcoholization tower main pipe respectively.

[0005] As a preferred solution, nitrogen branches are respectively arranged on the purification tower main pipe and the de-alcoholization tower main pipe, and nitrogen ball valves are also arranged on the nitrogen branches.

[0006] As a preferred solution, a vacuum pump ball valve, a cut-off valve, a check valve and a vacuum pump pressure gauge are sequentially arranged at the inlets of the first vacuum pump, the second vacuum pump, the third vacuum pump and the fourth vacuum pump.

[0007] As a preferred solution, the motors of the first vacuum pump, the second vacuum pump, the third vacuum pump and the fourth vacuum pump are monitored through motor meters.

[0008] Advantages of the utility model:

[0009] (1) The device combines the vacuum pump systems of the purification tower and the de-alcoholization tower through a connecting pipe. Originally, two vacuum pumps need to be started for evacuation, but now only one of them needs to be started, which can improve the utilization rate of the vacuum pump, save energy, and reduce the power consumption by 110 kWh after reducing one vacuum pump. Calculated based on 8000 hours a year, at least 700,000 yuan can be saved.

[0010] (2) After the device combines the vacuum pump systems of the purification tower and the de-alcoholization tower through a connecting pipe, the probability of shutdown caused by the damage of the vacuum pump can be reduced, and the losses caused by shutdown can be reduced. Description of the Drawings

[0011] Figure 1 This is the overall structural schematic diagram of the present utility model.

[0012] In the figure: 1. Refined tower main pipe; 2. Alcohol removal tower main pipe; 3. First vacuum pump; 4. Second vacuum pump; 5. Third vacuum pump; 6. Fourth vacuum pump; 7. Connecting pipe; 8. Isolation valve; 9. Reducing pipe; 10. Filter screen; 11. Main pipe pressure gauge; 12. Nitrogen branch pipe; 13. Nitrogen balloon valve; 14. Vacuum pump ball valve; 15. Cut-off valve; 16. Check valve; 17. Vacuum pump pressure gauge; 18. Motor instrument. Specific embodiments

[0013] The following further describes the present utility model in detail according to the drawings and specific embodiments.

[0014] Embodiment

[0015] As Figure 1 shown, a system for improving the utilization rate of a vacuum pump, the refined tower is connected in parallel with the first vacuum pump 3 and the second vacuum pump 4 through the refined tower main pipe 1, and the alcohol removal tower is connected in parallel with the third vacuum pump 5 and the fourth vacuum pump 6 through the alcohol removal tower main pipe 2. The refined tower main pipe 1 is connected to the alcohol removal tower main pipe 2 through the connecting pipe 7, and isolation valves 8 are respectively arranged at both ends of the connecting pipe 7.

[0016] Further, reducing pipes 9, filter screens 10 and main pipe pressure gauges 11 are sequentially arranged on the refined tower main pipe 1 and the alcohol removal tower main pipe 2. The reducing pipe 9 is used for connecting the refined tower main pipe 1 with the vacuum pump pipeline. The filter screen 10 prevents sundries from entering the vacuum pump, and the main pipe pressure gauge 11 monitors the pressure of the non-condensable gas.

[0017] Further, nitrogen branch pipes 12 are respectively arranged on the refined tower main pipe 1 and the alcohol removal tower main pipe 2, and nitrogen balloon valves 13 are also arranged on the nitrogen branch pipes 12. The nitrogen branch pipes 12 are used for purging the vacuum pump.

[0018] Further, vacuum pump ball valves 14, cut-off valves 15, check valves 16 and vacuum pump pressure gauges 17 are sequentially arranged at the inlets of the first vacuum pump 3, the second vacuum pump 4, the third vacuum pump 5 and the fourth vacuum pump 6. The vacuum pump ball valve 14 is used for manual opening and closing, the cut-off valve 15 is used for automatic opening and closing, the check valve 16 prevents the backflow of non-condensable gas, and the vacuum pump pressure gauge 17 is used for monitoring the pressure index of the vacuum pump.

[0019] Further, the motors of the first vacuum pump 3, the second vacuum pump 4, the third vacuum pump 5 and the fourth vacuum pump 6 are monitored through the motor instrument 18, and the motor instrument 18 is used for monitoring various parameters of the vacuum pump motor.

[0020] With the above system, its operation process is as follows: During normal production, the main pipe 1 of the refining tower and the main pipe 2 of the alcohol removal tower are connected in series through the connecting pipe 7, and the isolation valve 8 is opened so that the refining tower and the alcohol removal tower share one of the vacuum pumps, reducing the use of one vacuum pump and achieving the purpose of improving the utilization rate of the vacuum pump and reducing energy consumption.

Claims

1. A system for improving the utilization rate of a vacuum pump, characterized in that, The refining tower is connected in parallel with the first vacuum pump (3) and the second vacuum pump (4) through the main pipe of the refining tower (1). The alcohol stripping tower is connected in parallel with the third vacuum pump (5) and the fourth vacuum pump (6) through the main pipe of the alcohol stripping tower (2). The main pipe of the refining tower (1) is connected to the main pipe of the alcohol stripping tower (2) through a connecting pipe (7), and shut-off valves (8) are respectively arranged at both ends of the connecting pipe (7).

2. The system for improving the utilization rate of a vacuum pump according to claim 1, wherein, The main pipe of the refining tower (1) and the main pipe of the alcohol stripping tower (2) are respectively and sequentially provided with a reducing pipe (9), a filter screen (10) and a main pipe pressure gauge (11).

3. A system for improving the utilization rate of a vacuum pump according to claim 1, characterized in that The main pipe of the refining tower (1) and the main pipe of the alcohol stripping tower (2) are respectively further provided with nitrogen branches (12), and nitrogen ball valves (13) are also arranged on the nitrogen branches (12).

4. A system for improving the utilization rate of a vacuum pump according to claim 1, characterized in that At the inlets of the first vacuum pump (3), the second vacuum pump (4), the third vacuum pump (5) and the fourth vacuum pump (6), a vacuum pump ball valve (14), a cut-off valve (15), a check valve (16) and a vacuum pump pressure gauge (17) are sequentially arranged.

5. A system for improving the utilization rate of a vacuum pump according to claim 1, characterized in that, The motors of the first vacuum pump (3), the second vacuum pump (4), the third vacuum pump (5) and the fourth vacuum pump (6) are monitored through motor meters (18).

Images