The "vortex heat film heat exchanger" extends radially into the bottom of the storage tank. The heat transfer medium (steam) flows through the tubes, while the oil flows between the tubes in the shell side. The shell suction port is directly connected to the medium inside the tank.
A temperature control valve is installed at the steam inlet of the heat exchanger. The steam flow rate at the steam inlet is controlled by detecting the oil outlet temperature using a temperature sensor, thus ensuring a constant oil temperature.
The heat exchanger uses high-efficiency heat exchange elements-vortex heat film tubes-to maintain proper oil flow between the tubes. Its thermal efficiency is 3-5 times that of ordinary heat exchangers. Its enhanced heat transfer mechanism is as follows: the oil fluid flows in turbulent flow along the inner and outer surfaces, generating strong oscillations and scouring effects. The constantly changing flow direction leads to continuous replacement of the high-temperature oil fluid adhering to the tube wall surface, thinning and even damaging the insulation layer. This accelerates heat transfer across the metal surface, strengthens the micro-vortices in the fluid, and enhances internal heat diffusion within the oil fluid. It prevents localized overheating of the fluid close to the pipe wall, thus ensuring that the oil is properly and fully heated without the possibility of coking or decomposition. It offers good heat transfer without significant resistance.
