Application | Mobile Vacuum Transformer Oil Purification Plant

The PureTech mobile Double-Stage High Vacuum Mobile Transformer Oil Purification Plants (Model DVOP) are used for the conditioning and purification of aged insulating oil. As part of the transformer lifecycle management, regular servicing is essential, transformer oil treatment is very necessary, the process includes transformer oil dehydration, degasification and filtration. As a necessary maintenance tool for power transformers, it can effectively remove free and soluble water, gases and particulate matters contained in the transformer oil by single pass or several passes, thereby increasing and maintaining the dielectric strength of transformer oil, performing good insulation function in power transformers. Furthermore, depends on different demands of customers, our plants can be made as manually controlled or PLC controlled, integrating fully automatic functions suitable for off-line (de-energized transformer) as well as
on-line (energized transformer) filling, purification and filtration processes.

Double-Stage High Vacuum Transformer Oil Purifiers (Model DVOP) adopt two-stage vacuum pumps, namely rotary vane vacuum pump and roots booster vacuum pump, they are especially applied to transformer oil treatment of 110KV,220KV,500KV,750KV,1000KV power transmission line.

In addition, Model DVOP can also be used as an vacuum drying and vacuum filling equipment during transformer maintenance.

Features | Mobile Vacuum Transformer Oil Purification Plant

• Lower moisture content of transformer oil effectively

• Lower gas/air content of transformer oil effectively

• Elimination of residual gas from the insulation

• Drying of transformer insulation includes insulation paper drying (with double stage vacuum pump system)

• On-line measuring and recording of process parameters

• Easy, intelligent and safe operation

• Flexibility in application - various oil types and oil volumes

Process in short | Mobile Vacuum Transformer Oil Purification Plant

1. Filtration: Adopts one built-in filters to protect the oil purification plant against coarse contamination. And  two stages of fine filters to control the pollution level by removing 99.9% of the impurities over 5 (or 1) microns, and to achieve the final cleanliness of transformer oil.

2. Oil Heating: the aged transformer oil is heated by electrical heater with thermostat, which can brought the oil to the required heating temperature but avoid of overheating or dry burning. The specially designed horizontal heating tubes and generously dimensioned heating surface lower the heating density and lower the aging of transformer oil.

3. Degassing System:  this is where oil dehydration and oil degassing happens. This degassing system has been optimised and expanded with an automatic foam control. It has greatly expands the exposure surface of moisture under the vacuum, therefore greatly improve the efficiency of Transformer Oil Dehydration and degassing.

4. Vacuum Pump system:  it adopts a double-stage high vacuum pump system, used for evacuation of gases and create a vacuum for the degassing system. While it is not working for oil dehydration, it can be used standalone, as a separate vacuum pump system for transformer evacuation, to dry transformers and the insulation paper.

5. Oil transfer: the whole plant equipped oil pump to convery the transformer oil to different stages by means of differential pressure. It  can be optionally added frequency inverter to allow variable flow rates.

6. Other online measuring instruments and accessories: this oil purification plant can be included in some built-in measuring instruments and accessories, for example, built-in moisture content tester to check the real-time ppm value of transformer oil,  trailer-mounted type with water-proofing cover to protect the plant from harm of extreme weather or strong sunshine outdoor, etc.

Technical Data | Mobile Vacuum Transformer Oil Purification Plant

Machine Parameter	Item		Unit	DVOP-R-1800	DVOP-R-3000	DVOP-R-4500	DVOP-R-6000	DVOP-R-9000	DVOP-R-12000	DVOP-R-18000
	Flow rate		liters/hour	1800	3000	4500	6000	9000	12000	18000
	Vacuum degree		Mpa	(-0.08) ~ (-0.099)
	Working pressure		Mpa	≤ 0.3
	Temperature range		℃	40 ~ 80
	Power supply			380Volts, 50Hz, 3Phase (Or customized)
	Heating power		kw	24	30	48	60	90	120	130
	Total power		kw	26	34	54	68	100	135	146
	Inlet/outlet diameter		mm	32	32	44	44	50	58	65
	Size	Length	mm	1250	1350	1550	1800	2000	2100	2300
		Width	mm	900	1000	1150	1400	1750	1850	2000
		Height	mm	1450	1500	1700	1750	1800	2250	2300
	Weight		kg	500	600	800	1100	1300	1900	2300
Oil index after purification	Breakdown voltage		kV	≥75 (Spherical electrodes)
	Water content		ppm	≤ 4
	Gas content		%	≤ 0.1
	Filtering accuracy		micron	1

* OPTIONAL CONFIGURATIONS:

PLC automatic control system, Fully-Touch Screen, Mobile Trailer, Weather-proof Enclosure, Online Oil Testing Instruments, etc.

* Please inquire us for other flow rates or types.

* The machine size and weight will change slightly due to different configurations.

* We have experienced engineering team which can provide technical support and customized service for you.

Main Components | Mobile Vacuum Transformer Oil Purification Plant

a) Coarse Filter

b) Fine Filters

c) Inlet oil pump (optional)

d) Outlet oil pump

e) Heat exchanger

f) Vacuum degassifier

g) Vacuum pumping system

h) electrical control system (PLC is optional)

i) Condenser

j) all connecting hoses, valves, instruments.

k) Transformer Oil Regeneration columns

l) mobile trailer and water-proofing housing (optional)

PureTech Successful Projects on Oil Purification

Our After-Sales Service for You

• 12 months of quality guarantee for non-human damage.

• Lifelong maintenance and spare parts supply.

• Free training on operation, maintenance and troubleshooting at PureTech factory.

• Puretech engineers go to customer site for commissioning and training (payable service).

• Design accept user's customization.