Description
Introduction
Transformer oil will be oxidized and deteriorated to produce a series of oxidation products after the long-term operation, which destroys the original excellent physical and chemical properties and electrical properties so that it can not be used. Usually, this kind of transformer oil with a heavier degree of oxidative deterioration is called waste oil.
In fact, oxidation products in waste oil account for only a small part, generally 1-25%, and the remaining 75-99% are ideal components.
Transformer oil regeneration treatment is to uses physical or chemical methods to remove harmful substances in the transformer oil, restore or improve the physical, chemical, and electrical performance indicators of the transformer oil.
Transformer Oil Regeneration Method and Principle
- 1.Adsorbent method (physical and chemical method, suitable for oil with a lighter degree of oxidative deterioration)
- 2. Sulfuric acid-white clay(Fullers Earth) method (combined method, suitable for oil with heavier oxidation deterioration)
There are two ways of adsorbent methods:
(1) Contact method—regeneration method (stirring) in which the powdery adsorbent is in direct contact with the oil.
(2) Percolation method—mainly use granular adsorbent, puts it into a special adsorption tank (filter element), and passes the transformer oil through the adsorption tank to achieve the purpose of the purification and regeneration. This method can use online filtration and adsorption treatment.
Types and performance of adsorbents:
1. Activated clay(Fuller’s earth)—used in the regeneration treatment of transformer oil by contact method, the components that can be adsorbed moisture, unsaturated hydrocarbons, resins, and asphaltene organic acids.
2. Coarse-pored silica gel components that can be adsorbed oxidation products such as moisture, gas, and organic acid.
3. Activated alumina components that can be adsorbed organic acids and other oxidation products.
4. 801 Adsorbent (5A molecular sieve)-components that can be adsorbed oxidation products such as moisture, gas, unsaturated hydrocarbons, organic acids, etc.
Factors affecting the effect of adsorbent regeneration treatment:
1. Oil temperature—the best operating temperature for different adsorbents should be selected. For example, when using silica gel adsorbent, the temperature is generally 30～50℃, and for 801 adsorbent, the temperature is generally 50～60℃.
2.The effect of contact regeneration treatment is related to factors such as temperature, contact stirring time, adsorbent performance, dosage and other factors. The best processing conditions should be determined according to the degree of deterioration of transformer oil and small-scale tests.
NOTED: the regenerated transformer oil should be strictly filtered and purified before it can be used to prevent residues such as adsorbents from being carried into the operating equipment.
ASSEN DVTP-R Transformer Oil Regeneration Plant
Application
DVTP-R High vacuum Transformer Oil Regeneration machine is widely used in the purification of all kinds of insulating oil, especially the fine purification treatment of high-grade new oil, imported oil, and super-voltage transformer oil. ASSEN’s power transformer oil regeneration machine restores transformer oil by removing acidity, sludge, and soluble oil decay products with optional regeneration treatment technology. When the treatment is complete, the reclaimed oil meets or exceeds international standards for new oil with lower acidity and improved tan delta, inter-facial tension, and oxidation stability.
After treatment,oil quality guarantees to the following specifications.
Transformer Oil Regeneration Machine‘s Technical Parameters:
| Parameters | Unit | DVTP-R-30 | DVTP-R-50 | DVTP-R-100 | DVTP-R-150 | DVTP-R-200 | DVTP-R-250 | DVTP-R-300 | |
| Flow | L/min | 30 | 50 | 100 | 150 | 200 | 250 | 300 | |
| Working vacuum | MPa | 0.08 ～ 0.099 | |||||||
| Working Pressure | MPa | ≤0.3 | |||||||
| Temperature Range | ℃ | 20 ～ 80 | |||||||
| Power | Three Phase 50HZ380V(as per the customer’s requirements) | ||||||||
| Working Noise | dB（A） | 75 | 75 | 75 | 80 | 80 | 80 | 80 | |
| Heating Power | kW | 30 | 30 | 45 | 60 | 75 | 90 | 120 | |
| Total Power | kW | 35.5 | 37.5 | 52.5 | 71.4 | 86.5 | 102.5 | 135 | |
| Inlet/Outlet | mm | φ25 | φ32 | φ42 | φ50 | φ50 | φ60 | φ60 | |
| Weight | kg | 600 | 800 | 1050 | 1400 | 1800 | 2000 | 2200 | |
| Overall | Length | mm | 1050 | 1100 | 1200 | 1450 | 1600 | 1800 | 1900 |
| Width | mm | 750 | 800 | 950 | 950 | 1100 | 1200 | 1200 | |
| Height | mm | 1350 | 1400 | 1500 | 1650 | 1800 | 1900 | 1900 | |
Technical Features
- It can treat deteriorated transformer oil.
- It can significantly improve oil color. Dark-colored oil can be retrofitted to the color less than 1.5.
- It can recover aging insulating oil electrical with PH value ≥5.5, acid value ≤0.03 mg koH/g, or dielectric loss factors tgδ (90℃) ≤0.001 back to new oil characteristics.
- Control of strategic asset is retained. Oil in use is an asset. Use of regeneration technology removes dependence of the oil company on replacement suppliers and isolates them from wildly fluctuating external market prices.
- Extended life of power transformer equipment.
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