The Mechanical Handling and Storing of Material
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
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THE MECHANICAL DISPOSAL OF ASHES FROM STEAMERS
233
and then expelled by pneumatic pressure through an opening in the bottom of
the ship.
Before describing the system adopted by the British Navy, let us investigate the
French system just mentioned.
The compressed air ash ejector of Brou-
quiére & Baze is shown in Fig. 322. The
ashes are deposited in the apparatus through
the opening c, which closes water-tight; this
door c is manipulated by the piston and rod
of the pneumatic cylinder a; the pipes m and i
bring the supply from the main. The ashes
deposited in the hopper a are agitated with
water by a stirring device manipulated by spindle
b. The exit of the hopper a is closed by a
floating valve c, which may be opened by the
rope d connected to a piston in the pneumatic
cylinder e. Water can be admitted into the
hopper a from the body o, which is normally
full of sea water, through the tap g, whilst the
compressed air is admitted by cock h. The
delivery pipe b for the ashes may be closed by
gate valve k.
The apparatus acts as follows : Compressed
air is admitted below the piston in cylinder a,
whereby the door c is opened ; after the filling
of the hopper, door c is again closed by admit-
ting air above the piston of cylinder a. The
gate valve k is now opened to admit sea water,
whereby valve c is automatically dosed and tap
g is opened to let water in by pipe f, so that
the hopper is filled, when the stirrer is set to
work. Compressed air is now admitted beneath
the piston of cylinder e, which, by means of the
rope, opens the floating valve c into the position
shown dotted, to give a free exit to the mixture
of ashes and water. Compressed air is at the
same time admitted by cock /z, which forces
the ashes out.
The system on which the ashes are disposed
of in the British Navy consists of two types,
and are built by J. Stone & Co., Ltd., of
Deptford, which two systems are described as
follows. The pneumatic underline ash and
clinker expeller, used largely in His Majesty’s
Fig. 321. Arrangement of Korting’s
Hydraulic Ash Ejector.
Fig. 322. Compressed Air Ash Ejector
of Brouquiére & Baze.
Navy, and the hydro-pneumatic underline ash
expeller specially designed for the first-class turbine battleships and cruisers. The
former type discharges vertically downwards, while the second discharges generally through
the side of the vessel beneath the water line, as shown in Fig. 323. It was necessary to
have a side discharge in this case, owing to the fact that the main condenser suctions