Shaft kilns having fluid-bed air heater

Details Shaft kilns having fluid-bed air heater Shaft kilns having fluid-bed air heater

1985-07-15

1986-12-02

Favors, Edward G.

Heating

Shaft type

Having combustion products generated in or fed to shaft

432 96, F27D 108

Patent

active

046262008

ABSTRACT:
The invention utilizes fluid bed air heaters for burning coarse solid fuels which supply heated gases to annular shaft kilns or double inclined shaft kilns. The solid fuels are introduced into a fluidized bed of inert material, such as sand, alumina or ash, through means of an air lock and the hot gases of combustion pass through a cyclone separator to remove solid materials, which can be reintroduced into the fluidized bed. The hot gases are injected into the kilns to supply heat as needed for calcining or burning limestone or similar materials. Temperature control of the gas leaving the fluid bed air heater and reduced contamination of the burned materials are disclosed advantages of the present invention.

REFERENCES:
patent: 1805151 (1931-05-01), Reed
patent: 4021184 (1977-05-01), Priestley
patent: 4080784 (1978-03-01), Jubb
patent: 4431407 (1984-02-01), Beckenbach et al.
patent: 4473352 (1984-09-01), Sonoda et al.
patent: 4498286 (1985-02-01), Brannstrom et al.
patent: 4530207 (1985-07-01), Brannstrom et al.

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