INVEX Used Oil Re-refining Plant
At INVEXOIL, we specialize in the used oil re-refining process, utilizing advanced thin film evaporation technology to recycle and re-refine waste oil. Our “used oil refinery plant” is designed to conserve resources, protect the environment, and produce high-quality base oil products.
Advanced Thin Film Technology: This process starts with pre-treatment to remove impurities such as water, suspended particles, and light gases. The oil is then processed through thin film distillation units. These units create a thin layer of oil on heated surfaces under high vacuum conditions, allowing distillation at lower temperatures, which preserves valuable oil components.
Customizable Capacities: Invexoil designs and manufactures refinery plants in a wide range of capacities, from small-scale operations to high-capacity plants producing tens of tons per day, based on customer requirements and site conditions.
End Products:
- Base Oils (SN150, SN350, and SN500): High-quality oils meet international standards.
- Distillate Fuels: Suitable for various industrial applications.
- Bituminous Residues: Ideal for asphalt and bitumen production industries.
High Efficiency and Energy Optimization: Invexoil plants incorporate advanced energy-saving systems, reducing operational costs while maximizing productivity.
Advanced Oil Polishing System: To enhance the final oil quality, the plants include an advanced polishing system. This system improves oxidation stability, color, and odor indices using reusable adsorbents with long life spans and reactivation capabilities, ensuring continuous and efficient operation.
Expertise and Experience: Invexoil’s engineering team brings years of experience in designing and manufacturing industrial plants, ensuring optimal performance and quality.
Tailored Solutions: Re-refinery plants are designed and customized according to the unique requirements of each client.
Comprehensive Support: Invexoil offers full technical support and maintenance services to ensure the long-term efficiency and reliability of its equipment.
Environmental Sustainability: By minimizing hazardous waste and enabling the reuse of resources, Invexoil’s technology significantly reduces environmental impact.
• Short contact time with the hot surface
• High heat transfer rate through the film
• High evaporation at low temperatures
• High heat transfer coefficient
• No degradation or loss of active ingredients
• Self-cleaning of heat transfer surface
• Low-pressure drop during evaporation
• Suitable for viscous liquids
• High economic benefits
• Compliant with environmental standards
• High onstream efficiency without corrosion, fouling, coking
• High-quality base oils (API group)
• High technology without acid-clay method
• Low energy and low utility consumption
• High separation selectivity, removal of contaminants
• High process yield (oil recovery is more than 95%)
• Management of all odorous compounds to eliminate malodorous and toxic emissions
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• Vacuum system
• Heating system
• Process pumps
• Preheater
• Separator
• Sealings (1 No.)
• Partial condenser for TFE
• Cooler for TFE distillate (1 No.)
• Cold traps
• Hold up receivers
• Feed tank
• Feed pump
• Gear pumps
• Hot oil boiler system
• Condenser
• Receivers (2 No.)
• Process piping and valves
• Structures for high vacuum distillation setup
• Alarms and interlocks
• Temperature and pressure controller
• Drive system for controlling the oil flow rate
• Electricals
• Instruments and control panel
| Gasoil Characteristics | |
| Specific Gravity at 15′ C | 0.85 |
| End Point (c) | 360 |
| Viscosity, CST at 40′ C | 3-5 |
| Cetane Index | 50-55 |
| Sulfur, wt % | 0.1 |
| color | L-1 |
| Flash Point (c) | 55 |
| VGO Characteristics | |
| Distillation Range (c) | 370-550 |
| Specific Gravity at 15′ C | 0.875 |
| Viscosity CST at 40′ C | 27-35 |
| Viscosity CST at 100′ C | 4-5 |
| Flash Point (c) | 210 min |
| Sulfur wt % | 0.25 |
| CCR wt % | 0.1 max |
| TAN wt % | 1 max |
| Ashes wt % | 0.2 |
| Metals Content wt PPM | 10 max |
| Refined Base Oils (API group I) Characteristics | ||
| Characteristics | Base Oil SN-150 | Base Oil SN-500 |
| Specific Gravity at 15′ C | 870 | 885 |
| Viscosity cst at 40′ C | 25-32 | 90-100 |
| Sulfur wt % | 0.2 | < 0.25 |
| CCR wt % | 0.05 | 0.07 |
| color | 2 | 2.5 |
| TAN mg KOH/g | 0.03 | 0.05 |
| Flash Point (c) | 220 | 240 |
| Pour Point (c) | -3 | -6 |
| Metals PPM | L10 | L10 |
| Refined Base Oils (API Group II) Characteristics | ||
| Characteristics | Base Oil SN-150 | Base Oil SN-450 |
| Specific Gravity at 15′ C | 870 | 885 |
| Viscosity cst at 40′ C | 25-32 | 85-95 |
| Sulfur wt % | < 0.03 | < 0.03 |
| Saturates wt % | >= 90 | >= 90 |
| CCR wt % | < 0.01 | < 0.01 |
| color | L 1 | L 1.5 |
| TAN mg KOH/g | < 0.01 | < 0.01 |
| Flash Point (c) | 220 | 240 |
| Pour Point (c) | -3 | -6 |
| Metals PPM | Absent | Absent |
| Asphaltic Residue Characteristics | |
| Specific Gravity at 15′ C | 0.950-1.05 |
| Viscosity cat at 40′ C | 10,000 |
| Viscosity cat at 100′ C | 80 |
| Sulfated ash wt % | 3-4 |
| Sulfur wt % | 1-2 |
| Penetration mm/10 at 25′ C | 200-400 |
| Softening Point (c) | 15-20 |
| Asphaltic Residue Characteristics | |
| Position | Number |
| Supervisors | 1 |
| Workers | 2 |
| Laboratory | 1 |
| Total | 4 |
| Material & Energy Consumption | ||
| Characteristics | VGO or Base Oil API Group I Production | VGO or Base Oil API Group II Production |
| Electric Power kw/hr | 50 | 60 |
| Cooling Water m3 | 60 | 70 |
| Steam kg/hr | 2000 | 2000 |
| Fuel 103 kcal | 350 | 750 |
| Chemical kg | 7.5 | – |
| Hydrogen nm3 | – | 35 |
A thin film evaporator is a cylindrical shell enclosed in a heating jacket. It is equipped with an internal rotor that distributes a thin layer of oil on the heating wall using rotating blades. This rotor, which is electrically driven causes high turbulence and back mixing in the thin layer of the oil film and avoids product degradation at high temperatures.
Thin Film Evaporator Features:
Short residence time and high turbulence in the thin film improve the heat transfer coefficient and avoid overheating, oil cracking, and fouling. High evaporation rate obtained by a simple pass High oil yield is achieved without degradation or polymerization of heat sensitive material High onstream factor and easy maintenance.
Boiling Point:
The boiling point of a substance is the temperature at which the vapor pressure of the liquid equals the environmental pressure surrounding the liquid. (water boils at 70 C at Everest peak). At greater heights, there is less air above you, and hence pressure decreases. Lesser pressure hence lower boiling point as you go higher. In a medium vacuum, the free path (average distance traveled by a moving particle such as an atom, molecule, or photon) between successive impacts is less than 0.1 mm, and gas flow is defined by viscous flow equations. But in a high vacuum, this free path is considerably increased, and then Knudsen diffusion equations are applied.
Our Expertise:
Having expertise in designing, supplying, installing, and commissioning used lube oil re-refining systems, high vacuum distillation, thin film technology, and solvent extraction systems ensures consistent product quality and plant safety.
Application:
This technology is applied where products are heat sensitive, viscous, tend to foul heated surfaces, or have high boiling points. Our advanced vacuum systems which can provide high vacuum level stability, low-pressure drops, and high efficiency important factors for designing re-refining systems.
Medium vacuum: Pressure between 1000 mbar and 1 mbar.
Low vacuum: Pressure between 1 mbar and 0/001.
Harmful gases: Produced gases are separated by a water scrubber and active carbon absorbent filter.
a Sustainable Future
At Invexoil, we are committed to advancing the field of Used Oil Re-Refining through our innovative thin film evaporation technology. Our Used Oil Re-Refining process not only produces high-quality base oil and VGO distillate but also plays a crucial role in environmental protection by safely processing hazardous materials. With our headquarters in Germany and representatives in the UAE, Türkiye, and Canada, we are well-positioned to serve clients worldwide. For more information, please contact us here.