Forfatter: A.-M.Inst.C E., George Frederick Zimmer
År: 1916
Forlag: Crosby Lockwood and Son
Sted: London
Sider: 752
UDK: 621.87 Zim, 621.86 Zim
Being a Treatise on the Handling and Storing of Material such as Grain, Coal, Ore, Timber, Etc., by Automatic or Semi-Automatic Machinery, together with the Various Accessories used in the Manipulation of such Plant
THE HANDLING OF MATERIAL BY PNEUMATLC MEANS 225
dustless, practically noiseless, and the cost of repairs is only a fraction of that necessary
with mechanical conveyors.
The duct a is made either of steel or cast iron, and is of a diameter of 6, 8, or 10 in.
for capacities of 4, 6, and
10 tons per hour respec-
tively. The tank b is
made either of steel or
concrete.
In installations for
cold climates the recep-
tacle b is fitted with a
steam pipe to prevent the
damp ashes from freezing
together, which would
prevent them leaving the
Fig. 309. Details cf Bend in Pneumatic Suction Pipe for
Ashes and Clinkers.
outlet for removal.
An important feature of the Darley Suction Conveyor is that while removing the
ashes, it also removes the hot gases escaping from the ash hoppers, which are such a
serious nuisance in the basements of boiler-houses.
Fig. 310. Pneumatic Ash-Handling Plant at the Norfolk Navy Yard of the
United States Government.
J5