Improvements in Feed Water Heaters for Steam Boilers and the like.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Improvements in Feed Water Heaters for Steam Boilers and
the like.
I, ROBERT COCKBURN, of Cumbrae House, Dumbreck, in the City of Glasgow,
Engineer, dó hereby declare the nature of this invention to be as follows:-
-
This invention has for its object to provide a simple and efficient feed water
heater in which the feed pump discharge is circulated in a tortuous course through
tubes in a casing whereinto the exhaust steam from the feed pump is directed
and passes around the tubes.
The body of the heater casing is or may be of cylindrical formation and is fitted
with a large number of tubes which are open at their ends to domed end pieces
secured to the ends of the casing. The domed ends of the casing form the
inlet and outlet for the feed water and they are divided by webs or partitions so
that the water entering at the inlet from the feed pump is directed upwards through
the outermost rows of tubes, is deflected by the webs at the opposite end downwards
through adjoining rows of tubes and returns to the central part of the lower domed
end, whence it flows upwards through the central rows of tubes towards and
through the outlet in the upper domed end of the casing and thence passes to the
boiler. The arrangement of the webs may however be varied to direct the water
back and forth several times through the tubes which are heated by the exhaust
steam from the feed pump entering at one side of the casing, circulating around
the tubes, and passing out through the opposite side of the casing to a steam trap
or condenser.
Whirl plates of special section are or may be fitted within the tubes to cause
the water to whirl in contact with the surfaces heated by the steam.
The feed inlet and outlet are each provided with a valve, and a bye pass or
direct pipe connection is made between the feed pump and boiler, the inlet valve
being arranged to close either the bye pass connection or the connection to the
heater while leaving the other open.
A chest provided with an air relief valve is or may be fitted on the heater
casing, the water in the heater having access to the chest and serving to actuate a
float therein, which when raised by the water, closes the air relief valve, but when
falling owing to the accumulation of air opens the valve and allows the air to
escape.
Dated this 20th day of August 1808
WALLACE FAIRWEATHER,
Of the Firm of Cruikshank and Fairweather,
Chartered Patent Agents,
62, Saint Vincent Street, Glasgow,
Agent for the Applicant.

page_text: Improvements in Feed Water Heaters for Steam Boilers and
the like
IL
I, ROBERT COCKBURN, of Cumbrae House, Dumbreck, in the City of Glasgow,
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:-
This invention has for its object to provide a simple and efficient feed water
heater in which the feed pump discharge is circulated in a tortuous course through
tubes in a casing whereinto the exhaust steam from the feed pump is directed and
passes around the tubes.
".
The invention is illustrated in vertical section by the accompanying drawing.
The body of the heater casing A is or may be of cylindrical forination and is
fitted with a large number of tubes B which are open at their ends to domed end
pieces C, C¹, secured to the ends of the casing A. The domed ends C, C; of the
casing form the inlet D and outlet E respectively, for the feed water and they are
divided by cylindrical or domed webs or partitions C2, C3, so that the water
entering at the inlet D from the feed pump is directed upwards, as shown by the
arrows by means of the web C2, through the outermost rows of tubes B, is deffected
by the web C3 at the opposite end downwards through adjoining rows of tubes B
and returns to the central part of the lower domed end C, whence it flows upwards
through the central rows of tubes B towards and through the outlet E in the upper
domed end of the casing A and thence passes to the boiler. The arrangement of
the webs C2, C3, may however be varied to direct the water back and forth several
times through the tubes B which are heated by the exhaust steam from the feed
pump entering at F at one side of the casing A, circulating around the tubes B,
and passing out of the casing at F1 to a steam trap or condenser; or live steam may
be supplied to heat the tubes B, in which case water of condensation collecting in
the casing A may be periodically removed by blowing it out through the drain G.
Whirl plates of special section are or may be fitted within the tubes B to
cause the water to whirl in contact with the surfaces heated by the steam.
The feed inlet D and outlet E are each provided with a valve H, I, respectively,
and a bye pass or direct pipe connection J is made between the feed pump and
boiler, the inlet valve H being arranged to close either the bye pass connection J
or the connection to the heater while leaving the other open.
A chest K provided with an air relief valve L is or may be fitted on the heater
casing, the water in the heater having access to the chest K and serving to actuate
a float M therein, which when raised by the water, closes the air relief valve L,
but when falling owing to the accumulation of air opens the valve L and allows
the air to escape.
The apparatus may be placed either horizontally or vertically.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to he performed, I declare that what
I claim is: :-
1. A feed water heater the parts of which are constructed and combined sub-
stantially as described.
2. A feed water heater consisting of a casing containing tubes through which the
feed water, heated by live or exhaust steam surrounding the tubes, is directed in a
tortuous course by means of webs at the ends of the casing, and having a bye pass

page_text: for leading the feed water direct to the boiler and furnished preferably with an
air relief valve substantially as described.
Dated this 29th day of May 1899
WALLACE FAIRWEATHER,
Of the Firm of Cruikshank and Fairweather,
Chartered Patent Agents,
62, Saint Vincent Street, Glasgow,
Agent for the Applicant.
WALLACE FAIRWEATHER,
Of the Firm of Cruikshank and Fairweather,
Chartered Patent Agents,
62, Saint Vincent Street, Glasgow,
Agent for the Applicant.