... -special industry boiler adopting light oil or heavy oil as fuel, heat conduction oil as heat carrier. Circulating pump ... heating system is liquid closed circulation, hot oil used by user return to boiler through system pipe with ... , shrink-wide response, distillation, Concentration, evaporation, melts.2. Oil lipid: decomposition Deodorizer, Fatty acid distillation, Distillation, Heating hydrogenation, ...