HEATER FOR LIQUID FUEL Russian patent published in 2003 - IPC

FIELD: equipment for fuel pre-conditioning before combustion and for liquids heating in light industry and food processing industry. SUBSTANCE: tube-in tube heater comprises inner tube with spiral fins. Fins are spaced a distance from outer tube walls. The distance is 1-6 mm less than pitch between fin turns. Heater has tangentially disposed connection pipes for fuel input and output, electrical heater, installed along inner tube axis in a spaced relation to inner tube inner surface. Inlet connection pipe is arranged parallel to heater axis and has nozzle. Inner tube fin closest to nozzle is located parallel to nozzle axis and has bottom gap. Gap is 6-10 mm greater than pitch between fin turns. EFFECT: enhanced fuel heating and homogenization. 1 dwg