Therminol '66' to 350°C

For the indirect heating of a process reactor vessel, the customer required heat transfer fluid to be available at temperatures up to a maximum of 350°C. At the time of the original design full data was not available to allow operating temperatures etc. to be fixed and some flexibility had to be built into the system design. Since the installation required a liquid phase system, rather than design for operation under pressure, it was decided to propose a system using Solutia Therminol 66. Design : The 60 Kw Flameproof Electric Thermal Fluid Heater can operate at up to 350°C and in order to maximise fluid life, the system was provided with fully modulating control [thyristor], high fluid flow rate and was designed for the lowest practical film temperature below the manufacturer's recommended maximum of 375°C. Also, the system was designed with a hot seal pot to allow operation without a nitrogen blanket on the expansion tank. Process : During commissioning the optimum operating conditions were fully established and multiple proving runs were carried out to establish repeatability and product quality. The plant has now been in operation on a continuous basis for over five years without problems and is still using the original charge of Therminol 66 fluid. Overall, the system has resulted in more efficient operation and increased output per press. The customer now has the potential to further increase productivity on each line and to supply their clients' needs with fewer presses being needed to manufacture a particular component. Back to top

For more information on Therminol '66' to 350°C talk to Thermal Fluid Systems Ltd