Drying and gas or vapor contact with solids – Apparatus – With apparatus using centrifugal force
Patent
1986-02-25
1987-05-19
Makay, Albert J.
Drying and gas or vapor contact with solids
Apparatus
With apparatus using centrifugal force
34 80, 55208, 137595, F26B 2108
Patent
active
046656294
ABSTRACT:
A dryer for plastic granules with a fan for air, with a drying chamber containing a regenerable desiccant, with a collecting duct connectable to the drying chamber for the drying air, with an air heating element in the collecting duct, with a plurality of drying containers connectable to the collecting duct, with a return duct from the drying containers to an inlet duct of the fan, with a first reversing valve, which connects in a first switching position the drying chamber with the collecting duct, and in a second switching position the drying chamber with the atmosphere, and with a second reversing valve, which connects in a first switching position the inlet duct of the fan to the return duct and in a second switching position the inlet duct to the atmosphere. One object is the reliable and synchronous reversing of the two reversing valves. Another object shall enable the coupling of further groups of drying container to one drying chamber. The two reversing valves are arranged in a common valve housing. Each reversing valve comprises in a valve chamber an inlet opening and two outlet openings situated side by side as well as a valve plate positioned on a lever arm of a lever, for the said outlet openings. The two levers are coupled by a coupling rod and are coupled to a pushing rod of a drive crank. Two separate collecting ducts and return ducts are coupled in each case to a branch nozzle.
REFERENCES:
patent: 3621878 (1971-11-01), Smith
patent: 4509272 (1985-04-01), Graff
patent: 4553423 (1985-11-01), Tanimoto
patent: 4584781 (1986-04-01), Parkinson et al.
Brochure of Peter Cramer "Drying Apparatus for Drying Granules of Plastic Composition by Means of Drying Air".
Makay Albert J.
Westphal David W.
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