F - Mech Eng,Light,Heat,Weapons – 27 – B
Patent
F - Mech Eng,Light,Heat,Weapons
27
B
39/53
F27B 1/00 (2006.01) C04B 2/12 (2006.01) F27B 1/04 (2006.01) F27B 1/16 (2006.01)
Patent
CA 1205287
PROCESS OF AND APPARATUS FOR OPERATING A SHAFT FURNACE ABSTRACT OF THE DISCLOSURE In a shaft furnace for burning limestone or similar raw materials, gaseous, liquid or solid fuels are supplied through fuel supply pipes to the burning zone of a furnace shaft. To permit the simultaneous supply of at least two different fuels, the fuel supply pipes are arranged as multiple fuel lances. The fuel lances extend inwardly from the shaft furnace wall through the preheating zone into the first part of the burning zone. The fuel lance is a double tube member made up of an inner tube laterally enclosed by an outer tube forming an inner fuel supply passageway and an outer annular fuel supply passageway. Two separate fuels can be introduced into the burning zone, one flowing through the inner passageway and the other through the outer annular passageway. The two different fuels can be supplied in varying proportions without any changeover operations.
416894
Maerz Ofenbau Ag.
Marks & Clerk
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