A SYSTEM FOR EXTERNAL CONDUCTIVE, PARTIAL OR FULL HEATING OF SOLID OR HOLLOW OBJECTS WITH CYLINDRICAL OR RECTANGULAR OR SQUARE CROSS SECTION UP TO HIGH HEAT FLUX LEVEL

摘要

A system for external, conductive, partial or full heating of solid or hollow objects with cylindrical or rectangular or square cross section up to high heat flux level comprising at least two metal blocks having curved (2 or 14) outer periphery and with inner groove to match the outer periphery of the object (1 or 9 or 10 or 11 or 12 or 13) to be heated, a plurality of longitudinally formed holes on the metal blocks housing plurality of cartridge type of electrical heaters (7), a plurality of thermocouples (8) passing radially through the metal blocks (2 or 14) disposed in contact with the object (1 or 9 or 10 or 11 or 12 or 13) to be heated, which are assembled over the object to be heated (1 or 9 or 10 or 11 or 12 or 13) using a plurality of lug plates (3) and fasteners (4, 5 ,6); wherein the set of cartridge heaters (7) in each block are separately connected to 415 V AC power supply (15) through a thyristor control panel (16) and power cables (17) for supplying and controlling 230 V power to individual heaters enabling uniform heat supply including desired turn down ratio in the heating power supply; the power supply (15) being capable of providing high heat flux up to 2000 kW/m2 with maximum to minimum power ratio up to 40, and wherein the thyristor control panel (16) is capable of maintaining constant temperature of the object to be heated or maintaining constant heating power. The entire system is provided with suitable thermal insulation between blocks and all-around to prevent conductive heat transfer and losses.