Improvements in Apparatus for Superheating Steam.
Year: 1896

page_text: Improvements in Apparatus for Superheating Steam.
I, GEORGE SINCLAIR, of Albion Boiler Works, Leith, in the County of Mid
Lothian, North Britain, Boiler Maker, do hereby declare the nature of this
invention, to be as follows, that is to say:
My said invention has for its object to improve and render less costly the con-
struction and arrangement of apparatus as hereinafter described for superheating
steam and so as to utilise in a better manner than heretofore some of the heat
remaining in the fire gases of a steam boiler after they have acted on the main
parts of the boiler itself.
In carrying out my invention I employ two horizontal cylindrical vessels made
of steel or iron boiler plate. These two vessels are placed according to one
modification, transversely in and near the top of the main flue leading from the
boiler or boilers at any desired distance from each other and are connected together
by a number of rows of tubes extending longitudinally in the flue between the two
vessels, the ends of the tubes being fixed in holes formed for them in each vessel.
The tubes are so curved at each end that a straight part of one row extending
along the flue is lower than the same part of another row the tubes being thus
made to occupy more or less of the entire space within the flue. Steam to be super-
heated is led to one of the cylindrical vessels and passing through the tubes is led
off from the second vessel being acted on in its passage in a very effectual manner
by the fire gases passing through the flue among the tubes and in contact with the
cylindrical vessels a space being left round each vessel between it and the outer
casing of the flue which may be covered at these parts with any suitable non-
conducting material to prevent radiation of heat from the vessels.
Where desired the cylindrical vessels may be placed one at each side of and
longitudinally in the flue, the connecting tubes, in this case, extending in rows
across the flue; or where the flue is very narrow the cylindrical vessels may be
placed longitudinally in the flue one behind the other at any desired distance apart
the connecting tubes also extending longitudinally in rows between the vessels.
Instead of placing the superheater in the flue leading from the steam boiler or
boilers it may be placed on the top of the boiler or in any other convenient position
and be surrounded with brickwork arrauged so that the fire gases can be led to and
allowed to pass through among the tubes.
Dated this Thirteenth day of April 1896
EDMUND HUNT,
Applicant's Agent.

page_text: Apparatus Ior Superneating Steam.
I, GEORGE SINCLAIR, of Albion Boiler Works, Leith, in the County of Mid
Lothian, North Britain, Boiler Maker, do hereby declare the nature of this inven-
tion and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement, that is to say :--
My said invention has for its object to improve and render less costly the con-
struction and arrangement of apparatus as hereinafter described, for superheating
steam and so as to utilise in a better manner than heretofore some of the heat
remaining in the fire gases of a steam boiler after they have acted on the main
parts of the boiler itself.
In carrying out my invention I place in or partly in the main flue or equivalent
part of a boiler or set of boilers, two vessels provided with steam inlet and outlet:
pipes, and connected together by rows of tubes. The vessels and tubes are acted
on by the outgoing gases from the boiler or boilers, and steam within them is
thereby superheated.
And in order that my said invention and the manner of performing the same
may be properly understood I hereunto append a sheet of explanatory drawings, to
be hereinafter referred to, and showing three modifications of apparatus as made
according to my invention.
Figure, 1, of the drawings is a longitudinal vertical section of a, boiler flue in
which one modification of my improved apparatus is applied.
Figure, 2, is a transverse vertical section of a boiler flue in which a second
modification of my improved apparatus is applied.
Figure, 3, is a longitudinal vertical section of a boiler flue in which a third
modification of my improved apparatus is applied.
In these drawings the same reference letters are used to mark the same or like
parts wherever they are repeated.
I employ two horizontal cylindrical vessels, A, made of steel or iron boiler plate,
and I place them according to one modification shown in Figure, 1, transversely in and
near the top of the main flue, B, leading from the boiler or boilers at any desired.
distance from each other. The vessels, A, are connected together by a number
of rows of curved tubes, C, extending longitudinally in the flue, B, between the two
vessels, the ends of the tubes being fixed in holes formed for them in the two vessels.:
The tubes, C, are so curved at each end that a straight part of one row extending
along the flue, B, is lower than the same part of another row, the tubes being thus
made to occupy more or less of the entire space within the flue. Steam to be
superheated is led to one of the cylindrical vessels, A, by a branch, E, and passing
through the tubes, C, is led off from the second vessel by a branch, H, being acted
on in its passage in a very effectual manner by the fire gases passing through the
flue, among the tubes and in contact with the cylindrical vessels, a space, D,
being left round each vessel between it and the outer casing, G, of the flue which
may be covered at these parts with any suitable non-conducting material to prevent
radiation of heat from the vessels.
In the modification shown in Figure, 2, the cylindrical vessels, A, are placed one
at each side of and longitudinally in the flue, B, the curved connecting tubes, C,
extending in rows across the flue.
When a narrow flue, B, is being dealt with, as in the modification shown in
Figure, 3, the cylindrical vessels, A, are placed longitudinally in the flue one
behind the other, at any desired distance apart, the connecting tubes, C, extending
longitudinally in rows between the vessels.

page_text: Instead of placing the superheater in the flue (B) leading from the steam boiler
or boilers it may be placed on the top of the boiler or in any other convenient
position, and be surrounded with brickwork arranged so that the fire gases can be
led to and allowed to pass through among the tubes.
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:
Apparatus for superheating steam comprising two vessels provided with steam
inlet and outlet branches, and connected together by rows of tubes which are
arranged in the main flue or equivalent part of a boiler or set of boilers for the
purpose of being acted on by the outgoing gases substantially as hereinbefore
described.
Dated this Twelfth dox of Lonuar 1907
EDMUND HUNT,
Applicant's Agent.