Annular shaft kiln

Details Annular shaft kiln Annular shaft kiln

1986-07-08

1987-05-26

Yuen, Henry C.

Heating

Shaft type

Having combustion products generated in or fed to shaft

432 96, F27D 108

Patent

active

046681841

ABSTRACT:
An improved annular shaft kiln for burning particulate material such as limestone which adds a bridge to the lower part of the annular material zone between the burning zone and the cooling zone. This bridge permits heated cooling gas and at least some of the spent cooling gas to be withdrawn from the annular zone and be supplied directly to the combustion chamber of the kiln.

REFERENCES:
patent: 2518490 (1950-08-01), Parry
patent: 3958919 (1976-05-01), Kjell-Berger
patent: 4140480 (1979-02-01), Kaiser et al.
patent: 4289481 (1981-09-01), Yano
patent: 4351119 (1982-09-01), Mennier
patent: 4403951 (1983-09-01), Beckenbach et al.
patent: 4431407 (1984-02-01), Beckenbach et al.
patent: 4452584 (1984-06-01), Beckenbach et al.
patent: 4473352 (1984-09-01), Sonoda et al.

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