Heating – Processes of heating or heater operation – Including passing – treating or conveying gas into or through...
Patent
1982-12-17
1984-11-06
Camby, John J.
Heating
Processes of heating or heater operation
Including passing, treating or conveying gas into or through...
266197, 431162, 431284, 432 25, 432 94, 432 96, F27B 1500, F23Q 900, F27D 700, F27B 320
Patent
active
044809913
ABSTRACT:
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.
REFERENCES:
patent: 3771946 (1973-11-01), Hofer et al.
patent: 4289482 (1981-09-01), Fussl
patent: 4414186 (1983-11-01), Schmidt et al.
ZEMENT-KALK-GIPS, Band 35, Nr. 6, Jun. 1982, pp. 290-300 Wiesbaden-Biebrich, DE., Erwin Fussl et al.
Camby John J.
Maerz Ofenbau AG
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