Heating – Tumbler-type rotary - drum furnace – Having combustion products generated in or fed to drum
Patent
1994-11-28
1997-05-27
Bennett, Henry A.
Heating
Tumbler-type rotary - drum furnace
Having combustion products generated in or fed to drum
110246, F27B 736
Patent
active
056326165
ABSTRACT:
A method and improved apparatus is disclosed for improving combustion efficiency and reducing emission of gaseous pollutants during the manufacture of cement in conventional long rotary kilns. Air is injected through a port in the wall of a rotary cement kiln having a secondary burning zone established by burning solid fuel in contact with the in process mineral at a point downstream, relative to kiln gas flow of the clinkering zone in the kiln. The air injection apparatus is designed to enhance mixing of the injected air with the kiln gas stream and is characterized by high linear flow rates and/or multi-directional air injection ports. The air injection ports can be located downstream of a secondary burning zone to provide staged combustion with concomitant reduction in concentration of NO.sub.x, CO and hydrocarbons in the kiln gas stream.
REFERENCES:
patent: 2813822 (1957-11-01), Collier
patent: 3377056 (1966-09-01), Boye
patent: 3507482 (1970-04-01), Kraszewski et al.
patent: 3865541 (1975-02-01), Wilson et al.
patent: 3888621 (1975-06-01), Williams
patent: 3916806 (1975-11-01), Giraud
patent: 4123332 (1978-10-01), Rotter
patent: 4126471 (1978-11-01), Herchenbach et al.
patent: 4249890 (1981-02-01), Graham
patent: 4256503 (1981-03-01), Tsuda et al.
patent: 4273314 (1981-06-01), Keran et al.
patent: 4276092 (1981-06-01), St. John et al.
patent: 4286993 (1981-09-01), Lovichi et al.
patent: 4329180 (1982-05-01), Herchenbach et al.
patent: 4859177 (1989-08-01), Kreisberg et al.
patent: 4913552 (1990-04-01), Bracegirdle
patent: 5031549 (1991-07-01), Collins, Jr. et al.
patent: 5083516 (1992-01-01), Benoit et al.
patent: 5286200 (1994-02-01), Wurz et al.
patent: 5375535 (1994-12-01), Tutt
patent: 5454715 (1995-10-01), Hansen et al.
patent: 5549058 (1996-08-01), Tutt
Hansen Eric R.
Heap Michael P.
Tutt James R.
Ash Grove Cement Company
Bennett Henry A.
Cadence Environmental Energy, Inc.
Wilson G.
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