RU2751938C1 - Device for electrostatic cleaning and regeneration of dielectric liquids - Google Patents

Abstract

FIELD: electrical engineering.SUBSTANCE: invention relates to the purification and regeneration of dielectric fluids. The device consists of a control panel, a control panel for electrostatic oil cleaning, at least one pressure gauge, an inlet connection in series, an electromagnetic valve, an inlet oil pump, a mud filter, an upper vacuum tank with at least one spray nozzle, a lower vacuum tank, a safety relief valve, an outlet oil pump, a block of filters for electrostatic oil cleaning, a filter-precipitator connected to a pressure switch, a valve for sampling with a humidity sensor, a ball valve for switching to the internal line when electrostatic filters are clogged, a ball outlet valve, an outlet fitting. The lower vacuum tank includes float level sensors and is connected to a vacuum pump and a safety tank of the vacuum pump connected to a vacuum gauge and including a float level sensor. The filter unit for electrostatic oil cleaning contains two filters containing electrodes that assign appropriate charges to impurities of different nature, and a filter containing a coagulating electrode. A filter with a coagulating electrode is located between filters with electrodes that assign appropriate charges to contaminants of various natures, and is connected in series with them.EFFECT: invention increases the degree of purification, productivity and reliability of the device.1 cl, 6 dwg

Description

The invention relates to the field of purification and regeneration of dielectric fluids, preferably transformer, turbine, mineral, fire-resistant, aviation and hydraulic oils, including for cleaning turbine oil from mechanical impurities, moisture and gases (including air) by an electrostatic (electrophysical) method, including including electrostatic oil cleaning (EOM).

There is a known complex for superdeep drying and purification of liquid dielectrics [1], characterized in that it contains coarse filters, vacuum drying, ultradeep electrostatic filter packages, a buffer tank equipped with level sensors, a control solenoid valve and connected to vacuum drying and ultra-deep electrostatic filter packages cleaning, a foam sensor in the upper part of the vacuum drying, giving a signal to the solenoid valve, a heater, complete with an oil flow switch and a thermostat and connected through a coarse filter with a vacuum drying and with a pump, a pressure switch for emergency shutdown of the complex, a solenoid valve for shutting off the discharge pipeline to vacuum drying.

The disadvantages of this device are: the need for deeper drying of the oil, when working with transformer oils;

insufficient performance, insufficient filtration purity.

Known filter for purification of dielectric liquids [2], characterized in that it includes a body consisting of two parts, connected by flange connections, and fixing the body at an angle of 20 ° ± 5 °, and the upper part contains the power supply of the collecting electrodes, and the lower one includes a package of plates of collecting electrodes, which have slots covering the entire area of the electrode, having a width of 1 mm, and the dielectric plates have slots with a width of 5 mm.

The disadvantages of this device are: insufficient filtration purity, insufficient productivity.

The technical objective of the invention is the purification of dielectric fluids from mechanical impurities, moisture and gases (including air) by an electrostatic (electrophysical) method.

The task is solved by the fact that the device for electrostatic cleaning and regeneration of dielectric liquids contains a control panel, an electrostatic oil cleaning panel, at least one pressure gauge, inlet connection in series, a solenoid valve, an inlet oil pump, a mud filter, a top vacuum tank with no with less than one spray nozzle, lower vacuum tank, safety relief valve, outlet oil pump, filter unit for electrostatic oil cleaning, filter-precipitator, including at least one electrostatic disk and connected to a pressure switch, sampling valve with moisture sensor, ball valve for switching to the internal line when electrostatic filters are clogged, a ball outlet valve, an outlet fitting, while the lower vacuum tank includes float level sensors and is connected to a vacuum pump and a vacuum pump safety tank connected to a vacuum gauge and including a float level sensor, the device is mounted on a tube frame, the filter unit for electrostatic oil cleaning contains two electrostatic oil cleaning filters containing electrodes that assign appropriate charges to contaminants of various nature and an electrostatic oil cleaning filter containing a coagulating electrode, and an electrostatic oil filter with a coagulating electrode is located between filters for electrostatic oil purification with electrodes that assign corresponding charges to contaminants of various nature and is connected in series with them.

The essence of the invention is illustrated by drawings, in which:

in fig. 1 shows a hydraulic diagram of a device for electrostatic cleaning and regeneration of dielectric fluids;

in fig. 2 shows a block of filters of a device for electrostatic cleaning and regeneration of dielectric liquids;

in fig. 3 shows the EOM filter electrode;

in fig. 4 shows electrostatic discs;

in fig. 5 is a photograph of a general view of the device for electrostatic cleaning and regeneration of dielectric fluids; FIG. 6 shows a photograph of the control panel of the device for electrostatic cleaning and regeneration of dielectric fluids.

The drawings indicate the following elements of the device for electrostatic cleaning and regeneration of electrostatic liquids:

1. Entrance sleeve;

2. Inlet fitting;

3. Ball valve;

4. Solenoid valve;

5. Input oil pump;

6. Manometer B;

7. Filter mud collector;

8. Drain cock;

9. Spray nozzle A;

10. Top vacuum tank;

11. Valve for filling air into the tank;

12. Spray nozzle B;

13. Vacuum meter;

14. Float level sensor;

15. Safety tank of the vacuum pump (condenser);

16. Drain cock;

17. Check valve;

18. Vacuum pump;

19. Bottom vacuum tank;

20. The upper level sensor is float;

21. Drain cock;

22. The lower level sensor is float;

23. Safety relief valve;

24. Output oil pump;

25. Manometer G;

26. Ball valve;

27. Drain cock;

28. The filter of electrostatic cleaning (EOM) assigning the appropriate charges D;

29. EOM filter assigning the corresponding charges E;

30. EOM coagulating filter;

31. Air inlet valve;

32. Pressure switch;

33. Ball valve;

34. Air inlet valve;

35. Filter - precipitator;

36. Oil drain valve for sampling;

37. Moisture sensor;

38. Ball valve for switching to the internal line;

39. Check valve;

40. Outlet ball valve;

41. Outlet fitting;

42. Outlet sleeve;

43. Control panel;

44. EOM control panel;

45. Tubular frame;

46. Electrostatic discs;

47. Electrode that assigns charges;

48. Coagulating electrode;

49. EOM filter block.

The device for electrostatic cleaning and regeneration of dielectric liquids contains at least one vacuum tank (10,19), a control panel (43), an EOM control panel (44), a solenoid valve (4), an inlet oil pump (5), a mud filter (7) , at least one spray nozzle (10,12), upper vacuum tank (10), lower vacuum tank (19), output oil pump (24), vacuum pump (18), vacuum pump safety tank (condenser) (15), float level sensor (14), inlet connection (2), outlet connection (41), EOM filter unit (50), EOM filter assigning the corresponding charges D (28), EOM filter assigning the corresponding charges E (29), EOM coagulating filter ( 30), at least one manometer B (6) and manometer G (25), pressure switch (32), safety relief valve (23), drain valve (8), ball valve to the internal line (38), electrode assigning charges (47), coagulating electrode (48), filter-precipitator (35), tube frame (45).

The device for electrostatic cleaning and regeneration of dielectric is connected to the tank with the oil to be cleaned using flexible hoses (1.42), which are made with the possibility of connecting to the inlet and outlet threaded branch pipe (2.41). After turning on the vacuum pump (18), the inlet oil pump (5) and opening the solenoid valve (4), the oil is pumped into the device, pumped through the mud filter (7), then the oil flows through the spray nozzles A and B (9,12) , into the upper vacuum tank (10) and the lower vacuum tank (19), in which a vacuum of the order of -0.7 Atm is maintained. In a vacuum tank, water is removed from the oil, which is pumped out by a vacuum pump (18). To protect the vacuum pump from the ingress of processed oil, the device has a vacuum pump safety tank (condenser) (15) when oil gets into which the float level sensor (14) is triggered, which turns off the device to prevent oil from entering the vacuum pump. Further, the oil is pumped out of the tank by an output oil pump (24) and pumped through the EOM filter unit (50), consisting of an EOM filter assigning the appropriate charges D (28), an EOM filter assigning the corresponding charges E (29) and an EOM coagulating filter (30), in which mechanical impurities are retained. The degree of clogging of the filters of the EOM unit is determined by the readings of the manometers (25). After that, the oil is pumped through a precipitator filter (35), in which contaminated particles are deposited. The degree of clogging of the electrostatic discs (46) is determined by the indication of the pressure switch (32). When the pressure in the line in front of the filter - precipitator increases to the value set on the pressure gauge (25) (in the case when the filter is clogged with sludge), all pumps are turned off (5,18,24). The "Clean filter" lamp on the control panel (43) comes on. When the filter is clogged, it is necessary to remove the voltage from the EOM filters, press the green button on the control panel (43) "Filter EOM", it will go out, while the red light / button "Filter EOM" will go out on the EOM control panel (44). The filter can then be disassembled for flushing. If the permissible pressure is exceeded, the safety relief valve (23) is activated and the oil flow is redirected through the pump, bypassing the filters. When the pressure on the pressure gauge (6) increases, it is necessary to clean the mud filter (7) by placing a container of no more than 15 liters under it and empty the filter by opening the drain valve (8). To pump oil through the internal line, open the ball valve for switching to the internal line (38), while pre-closing the outlet ball valve (40). During the cleaning process, dirt particles are removed from the oil and are retained on the electrostatic discs (46) and the mud filter, such as: - metal particles of any nature; - particles of rubber and other sealing materials; - metal carbides; - corrosion products; - oil sludge; - fibers; - other particles.

The industrial applicability of the device and method is confirmed by photographs shown in FIG. 5 and 6.

An example of the constructive implementation of the device.

The device for electrostatic cleaning and regeneration of dielectric liquids is placed in a tube frame with a length of no more than 1500 mm, a width of no more than 1100 mm, a height of no more than 1850 mm and a weight of no more than 500 kg.

The volumetric oil consumption is 1000-2600 l / h. The maximum working pressure at the outlet is no more than 0.4 MPa. Inlet pressure 0.03-0.3 MPa at an inlet oil temperature of 10 <90 ° C and a supply voltage of 380 ± 10% V.

The noise level will not exceed 80 dB. The size of the fraction of the removed dirt particles is 2 <250 microns. The cleanliness class after cleaning is not worse than 9, according to GOST 17216-01.

The supply voltage will be - 380 ± 10% V. Type of current, frequency - variable, 50 ± 2% Hz and power consumption, no more than - 10 kW.

The service life of the device will be at least 15 years.

Sources of information:

1. Patent for invention of the Russian Federation No. 2592085 "Complex for superdeep drying and purification of dielectric liquids", В03С5 / 00, application filing date 03.02.2015, published on 20.07.2016.

2. Patent for a useful model of the Russian Federation RU 158784U, "Filter for cleaning dielectric fluid networks" B03C5 / 00, filing date 07.16.2015, published 01.20.2016.

Claims (1)

A device for electrostatic cleaning and regeneration of dielectric liquids, containing a control panel, an electrostatic oil cleaning panel, at least one pressure gauge, inlet connection in series, a solenoid valve, an inlet oil pump, a mud filter, an upper vacuum tank with at least one spray nozzle, a tank vacuum bottom, safety relief valve, output oil pump, filter unit for electrostatic oil cleaning, filter-precipitator, including at least one electrostatic disk and connected to a pressure switch, a valve for sampling with a humidity sensor, a ball valve for switching to the internal line in case of clogging electrostatic filters, ball valve outlet, outlet connection, while the lower vacuum tank includes float level sensors and is connected to a vacuum pump and a vacuum pump safety tank connected to a vacuum gauge and including a float level sensor, see device mounted on a tube frame, the filter unit for electrostatic oil cleaning contains two filters for electrostatic oil cleaning, containing electrodes that assign appropriate charges to contaminants of different nature, and an electrostatic oil cleaning filter containing a coagulating electrode, and an electrostatic oil filter with a coagulating electrode is located between the electrostatic cleaning filters oils with electrodes, assigning appropriate charges to contaminants of different nature, and connected in series with them.

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