REGENERATIVE MEDIA BASED POLISHING SYSTEMS
Regenerative Media Based Polishing Systems
Drawing on decades of experience and continuous innovation, Thermopac has developed an adsorbent, RE-GENERATABALE media-based polishing system (also called finishing system) that yields high quality API I base oil without the usage of hazardous solvents or chemicals; or employing potentially hazardous hydrogen treatment plants.
It is designed as an add-on or retrofit to wiped film evaporators; it is equally applicable to other types of refineries as a final polishing stage. When retrofitted onto an existing refinery, it saves millions. Thermopac polishing system can be customized to seamlessly replace your current acid-clay system as well.
THERMOPAC Polishing System:
The non-consumable polishing system works on the principle of adsorption. The unpolished oil product is passed through this special media several times to get a color close to ASTM A 1 and devoid of odour. Furthermore, it results in reduction of some sulphur. Once the media gets saturated, the media undergoes reactivation at elevated temperature. After the completion of the reactivation process, it is cooled to room temperature and it is ready for reuse. The system comes in two sets of regenerative media based polishing systems; when one set is under reactivation, the other set is in polishing mode. The process loss is only the oil that is burnt during the reactivation process, which is approximately 1% of the weight of the media.
A major advantage of using this special media is that once equilibrium efficiency is obtained, no additional reduction in efficiency occurs with further regenerations.
The highest operating cost is $ 18 per ton of finished product.
The media can be used multiple times before being disposed of. It is environmental-friendly; the waste can be directly disposed of at a local landfill without any pre-treatment.
The process does not suffer from any of the following drawbacks encountered in the contemporary method of solvent extraction:
|Sr No.||Parameters||Test Method||Unit||HFD|
|1||Appearance||Visual||–||Clear and Bright|
|2||Colour||ASTM –D 1500||–||<3.0|
|3||Density at 15 deg C||ASTM -D 1298||gm/mL||0.85 – 0.87|
|4||Kinematic Viscosity at 50 deg C||ASTM -D 445||cSt||16- 22|
|5||Moisture content||ASTM –D 95||%vol||Nil|
|6||Sulphur Content, max||ASTM -D 4294||%w/w||0.3|
|7||Flash point (PMCC), min||ASTM -D 93||Deg. C||100|
|8||Ash Content||ASTM -D 93||%w/w||Nil|
|9||Conradson Carbon Residue, max||ASTM -D 189||%w/w||0.1|
|10||Gross Calorific Value||ASTM -D 4868||kcal/kg||>10000|
|11||Net Calorific Value||ASTM -D 4868||kcal/kg||>9000|