Gasification melting furnace for wastes and gasification melting method

• Main Authors: YAMAMOTO TAKAIKU, MUTSUTA AKIO, MATSUBARA HITOSHI, YANO TAKAHIRO, NAKASHIMA TATSUO, OOWADA TERUO, YAMAOKA HIDEYUKI, ISHIDA HIROAKI, MATSUKURA YOSHINORI, SATO HIROTAKA, ISAKA KATSUYA, FURUKAWA NOBORU
• Format: Patent
• Language: English
• Published: 15.10.2002
• Edition: 7
• Subjects: BLASTING; CARBURETTING AIR OR OTHER GASES; CHEMISTRY; COMBUSTION APPARATUS; COMBUSTION PROCESSES; CONSUMING WASTE PRODUCTS BY COMBUSTION; CREMATION FURNACES; FERROUS OR NON-FERROUS ALLOYS; FUELS; FURNACES; FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; HEATING; KILNS; LIGHTING; LUBRICANTS; MECHANICAL ENGINEERING; METALLURGY; METALLURGY OF IRON; OPEN SINTERING OR LIKE APPARATUS; OVENS; PEAT; PETROLEUM, GAS OR COKE INDUSTRIES; PRETREATMENT OF RAW MATERIALS; PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OFWROUGHT-IRON OR STEEL; PRODUCTION AND REFINING OF METALS; PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROMSOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; RETORTS; TECHNICAL GASES CONTAINING CARBON MONOXIDE; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS; WEAPONS

A gasification and melting furnace for wastes has a vertically movable furnace center lance disposed along the axis of the furnace and adapted to blow off a combustion sustaining gas downward into the furnace. One or more stages of upper tuyeres are disposed so that the angle at which the combustion sustaining gas is blown off into the furnace is displaced from the furnace axis direction, and one or more stages of lower tuyeres projected into the furnace so as to blow off a combustion sustaining gas or both combustion sustaining gas and fuel toward the furnace axis. Formation of a low temperature region in the furnace are prevented and a fire spot is concentrated on the combustion of wastes. As a result, molten slag and various metals, as well as an energy gas, which are high in added value, can be recovered stably.