New or Improved Means of and Apparatus for Heating or Additionally Heating Steam Generators by the Application of Hot Air.
Year: 1888

page_text: Date of Application, 26th May, 1888
Complete Specification Left, 26th Mar., 1889
Complete Specification Accepted, 25th May, 1889
PROVISIONAL SPECIFICATION.
A New or Improved Means of and Apparatus for Heating or
Additionally Heating Steam Generators by the Application of
Hot Air.
I, ROBERT SHACKLETON, of The Borough Paper Mills, Bradford in the County of.
York, Paper Manufacturer, do hereby declare the nature of this invention to be as
follows:-
This invention relates to a new or improved means of and apparatus for heating or
additionally heating steam generators:
The said improvements consist in applying heated air in the manner hereinafter
described for the purpose of generating steam or heating or increasing the heat of
steam generators.
To carry out my invention I inject or otherwise force air through a system of
tubes arranged in the bottom flue of a boiler, or other chamber or furnace adapted
for the application of heat thereto, and thereby obtain a supply of heated air.
I utilise such heated air by passing it through a series or coil of metallic tubes
or pipes arranged in any suitable manner in a chamber or boiler containing
water, thus heating such water and forming a steam generator or a supplementary
means of additionally heating such boiler.
As a modification I may pass the heated air through the said chamber and circulato
the water in the tubes contained therein.
In this manner an independent steam generator, preferably of the multitubular
type, may be heated by hot air supplied from the furnaces of other boilers, or such
air may be heated in the above described manner by an independent furnace with any
suitable fuel, oil, or gas.
Or I may utilise heated air in combination with an ordinary boiler furnace for
generating steam by forcing such heated air through tubes passing in any convenient
manner through the boiler. In the case of the Lancashire type of boiler I prefer-
ably arrange such tubes in a longitudinal manner beneath the fire box.
After heating the water I preferably utilise the air to supply the furnace and
arrange it to pass into the combustion chamber through inclined boles in the bridge.
Dated this 25th day of May 1888.
DRACUP & NOWELL,
Bradford, Agents.

page_text: .COMPLETE SPECIFICATION.
A New or Improved Means of and Apparatus for Heating or
Additionally Heating Steam Generators by the Application of
Hot Air.
1, ROBERT SHACKLETON, of the Borough Paper Mills, Bradford, in the County of
York. Paper Manufacturer, 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 relates to a new or improved means of and apparatus for heating or
additionally heating steam generators.
The said invention consists in the use of air heated and applied in the manner
hereinafter described for the purpose of generating steam or increasing the heat of
steam generators.
To carry out my invention I inject or otherwise force air through a system of tubes
arranged in the bottom flue of a boiler or other furnace adapted for the application
of heat thereto and thus obtain a supply of heated air.
I may utilise such heated air to heat an independent steam generator by passing it
through a series or coil of metallic tubes arranged in any suitable manner within
such steam generator, or air may be heated for this purpose in the above described
manner by an independent furnace with any suitable fuel, oil or gas.
Or I may utilise air heated in the furnace or flues of a steam generator as an
auxiliary means of heating or additionally heating such steam generator by passing
it in any convenient manner through tubes within said generator. In the case of the
Lancashire type of boiler I preferably arrange such tubes in a longitudinal manner
beneath the fire box.
After heating the water I preferably utilise the air to supply the furnace and arrange
it to pass into the furnace in any suitable manner.
In order to fully describe my invention reference is to be had to the accompanying
sheet of drawings forming a part of this specification, in which similar letters of
reference indicate corresponding parts in each of the figures.
Figure 1 represents a longitudinal section of a Lancashire boiler and lower flue to
which my improvements are applied.
Figure 2 is an end view of the same.
Figure 3 is a longitudinal section of a multitubular boiler adapted to be heated by
hot air.
Figure 4 is a diametrical section of a vertical boiler fitted with a coiled pipe or
tube through which hot air is forced for the purpose of heating such boiler.
Referring to figures 1 and 2: A tubular heating apparatus consisting of tubing A
disposed longitudinally in the bottom flue B of the boiler C through which air is
forced by an injector, blower or any convenient means. The air passes into the
tubes A at D and passing to and fro along the tubes arranged at one side of the

page_text: fue B crosses over to the tubes at the other side of such flue and after traversing
the latter reaches the end E in a highly heated condition. Such heated air then
passes by the pipe F divided at G to the induction ends of independent tubes H
arranged longitudinally beneath the fire boxes J and internal flues of the boiler.
The tubes Hextend from end to end of the boiler and back again thus winding
backwards and forwards several times before passing out of the boiler at the opposite
sides of the fire boxes J.
By the time the air traversing the tubes H passes out at the ends Kit has parted
with the greater portion of its heat and such air leaves said tubes at approximately
the temperature of the water in the boiler and is preferably used to supply the
furnaces to which it is guided by the pipes L and introduced in any suitable manner.
In figure 3, an air chamber M is fitted at one end of the boiler and divided hori-
zontally by the partition N into an upper and lower division. A single chamber O
is also fixed at the other end of the boiler which places all the longitudinal tubes H
in communication at that end. The tubes H may pass backwards and forwards
similar to the tubes shown in figures 1 and 2 before opening into the said chambers.
Air heated in the manner explained with reference to figures 1 and 2 or in any
similar manner is forced through the opening P into the bottom division of the air
chamber M, this heated air traversing the lower tubes H which open into such division
passes into the chamber Q at the other end and is forced back along the upper
tubes H into the upper division of M and passes away through R. The heated air
as it traverses the tubes H parts with its heat and thus heats the boiler.
In figure 4 the tube H through which the heated air is forced is arranged in a
coil adapted to allow the air to pass in at S and out at T.
As a modification steam generators adapted to be heated in the above described
manner may be constructed to hold water inside suitably arranged tubes and pass or
force heated air through an outer casing in contact with such tubes thus heating the
water therein.
Having now particularly described and ascertained the nature of my said invention
and in what manner the same is to be performed I declare what I claim is :
The independent or auxiliary means of heating a steam generator by heated air
forced through a tubular system within said generator such air being heated during
its passage through an inclosed tubular heating apparatus arranged in the flue or
furnace of said generator or in a separate furnace, substantially as herein shown and
described.