MOVING BED TYPE HEATING FURNACE

• Main Authors: TAKASHI KOICHI, AKIYAMA SHUNICHI
• Format: Patent
• Language: English
• Published: 31.03.2000
• Edition: 7
• Subjects: AIR SUPPLY; BLASTING; CHEMISTRY; COMBUSTION APPARATUS; COMBUSTION PROCESSES; DRAUGHT-INDUCING; FURNACES; FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; HEATING; KILNS; LIGHTING; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; MECHANICAL ENGINEERING; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; OPEN SINTERING OR LIKE APPARATUS; OVENS; RETORTS; SUPPLYING NON-COMBUSTIBLE LIQUID OR GAS; WEAPONS

PROBLEM TO BE SOLVED: To ensure uniform heating of an object to be heated while contributing to energy saving by providing at least one set of high speed combustion heat storage combustion burners performing alternating combustion and delivering combustion air at a specified current velocity. SOLUTION: Each combustion zone is arranged, along the circumferential direction of the side wall of a rotary bed heating furnace, with a plurality of pairs of heat storage combustion burners performing alternating combustion. For example, combustion air supplied to a pair of two stage combustion type heat storage combustion burners 12a is heated with thermal energy stored in a heat storage body 13a of the burner 12a at the time of passing through the heat storage body 13a and ejected into a furnace through a burner throat 19 together with primary fuel being supplied to a primary fuel nozzle 18. Secondary fuel is then supplied into the furnace from a secondary fuel nozzle 20 arranged around the burner throat 19. Current velocity of combustion gas must be 60 m/see or above at the burner throat in order to entrain combustion exhaust gas.