Improved Apparatus for Feeding Steam Boilers.
Year: 1891

page_text: COMPLETE SPECIFICATION.
Improved Apparatus for Feeding Steam Boilers.
VEBT
I, HENRY DAVEY, of 3, Princes' Street, Westminster, in the County of
Middlesex, Engineer, do hereby declare the nature of this invention and in what
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement :-
It is found in feeding steam boilers with water from surface condensers that the
oil and grease which comes over from the engine with the steam into the condenser,
and which is carried into the boiler with the feed water, is injurious in its effects
on the boiler. The object of this invention is to secure hot and soft water for
feeding boilers, which shall not be contaminated by oil or grease from the engine.
In Fig. 1. A is a feed tank receiving water from any convenient source, the supply
being regulated by the ball cock b. C is a self contained feed pump mounted on
the tank A and worked in the ordinary way with steam from the boiler. The
exhaust from the steam cylinder of the said feed pump is led by a pipe into the
water in the tank A. d is a pipe conveying the water from the feed pump to a
feed water heater D, the said heater being placed on the exhaust pipe of the
engine. The exhaust steam passing through the heater D to the condenser E.
The heater D is constructed like a surface condenser having tubes through which
the feed water passes, as indicated by the arrows. The exhaust steam from the
engine on its way to the condenser heats the water passing through the tubes of
the heater D. The feed water after passing the heater D passes through the pipef
to the vessel H, and enters it in the raised part g. The vessel H is in direct com-
munication with the boiler I by means of a steam pipe k. The feed water delivered
into the vessel H by the pipe passes out of the said vessel into the boiler through
the pipe m. The bottom of the vessel H is provided with a movable tray n. The
action of the apparatus is thus described. The feed pump C pumps the water in
the tank A. through the heater D into the vessel H, the water being heated, first
by the exhaust steam of the feed pump, then further heated by the exhaust from
the main engine, and finally coming into contact with the steam of the boiler in the
vessel H, it becomes heated up to the temperature of the boiler steam before it
enters the boiler. In this condition it deposits some or all of the solids it contains
in the vessel H. The solids thus deposited may be cleaned out from time to time
by removing the trays n, or by scraping the inside of the vessel H. e is a cock for
regulating the feed to the boiler I.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what I
claim is :-
1st. The combination of the feed tank A, the feed pump C, the regulating
cock e, and the feed heater D. and the surface condenser E, substantially as
described and illustrated.
2nd. The combination of the feed tank A, the feed pump C, the regulating
cock e, the feed heater D, the surface condenser E, the depositing vessel H, the
feed pipe m, and the steam boiler I, substantially as described and illustrated.
Dated this 1st day of April 1891.
HENRY DAVEY.