Heating – With work cooling structure – Combustion feed air cools exiting work by contact
Patent
1982-10-12
1985-07-09
Yuen, Henry C.
Heating
With work cooling structure
Combustion feed air cools exiting work by contact
432128, 432176, 432145, F27D 1502, F27B 304
Patent
active
045279748
ABSTRACT:
The ceramic roller-hearth kiln is divided into three zones, of which the first and last are utilized for the initial heating and the cooling of the material respectively, and the central zone, which is provided with combustion means and utilized for high-temperature firing, comprises a conduit for the forced counter-current suction of the gaseous products of combustion between said second and said first zone, from said conduit there branching two ducts for the feed and recovery of part of the hot gas to and from the first zone; the cooling zone being constituted by three successive sections comprising, respectively, direct cooling by blowing air on to the material, cooling by induction and cooling by forced ventilation, the hot air recovered from said cooling zones being fed to the head of the kiln, to flow into said forced suction conduit.
REFERENCES:
patent: 3172647 (1965-03-01), Remmey
patent: 3705620 (1972-12-01), Kayatz
patent: 4047886 (1977-09-01), Heyrand
patent: 4249895 (1981-02-01), Mantegani
patent: 4285669 (1981-08-01), Walchhutter
Carraroli Dario
Giavelli Giordano
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