C - Chemistry – Metallurgy – 10 – B
Patent
C - Chemistry, Metallurgy
10
B
202/14
C10B 49/00 (2006.01) C10B 1/10 (2006.01) C10B 49/04 (2006.01)
Patent
CA 1089794
METHOD AND APPARATUS FOR IMPROVED IN SITU COMBUSTION OF PYROLYSIS GASES IN A KILN ABSTRACT Temperature control is often a problem in direct- fired rotary kilns for the pyrolysis of carbonaceous materials wherein at least part of the thermal energy for pyrolysis is obtained by in situ combustion of the pyrolysis gases. The present process and apparatus provides a means by which tempera- ture control, and particularly reduction in intensity of the fireball at the burner end of the kiln and/or moving the fireball away from the burner hood. This is accomplished by (1) controlling the velocity of any burner gases and the velocity of the in situ air (or other oxygen-containing gas) and (2) the distribution of the in situ air at the burner end of the kiln, such that a Craya-Curtet number of at least 0.2, and preferably at least 0.4, is obtained. In a preferred embodiment, the in situ air is admitted into the burner hood from a plenum chamber disposed circumferentially around at least a portion of the kiln, the air entering the burner hood through the annulus defined between the outer shell of the kiln and the burner hood. Inventors: Donald E. Honaker Louis J. Jacobs, Jr.
289934
E. Honaker,donald
Jacobs Louis J.
Mcfadden Fincham
Mosanto Company
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