Improved Means of Utilizing Waste. Heat from, Steam Boiler and other, Furnaces.
Year: 1894

page_text: Date of Application, 21st: Dec., 1894..
Complete Specification Left, 19th Sept., 1895-Accepted, 2nd Nov., 1895
PROVISIONAL SPECIFICATION.
Improved Means of Utilizing Waste. Heat from, Steam Boiler
and other, Furnaces.,
JOHN HORROCKS Ainsworth House Aipsworth near Bolton do hereby declare
the nature of this invention to be as follows:-
My invention consists in building a number of air pipes. vertically or otherwise,
or hollow.vessels in the flue behind the steam boiler [or economiser for heating the
water attached to, same] into which the cold air is. admitted or inducted by means
of a fan steam jet,or-air compresser. The air an heated is forced into the furnace
box which is practically,closed to any other, supply than what passes, through the
air. pipes refered to. In some cases, I, dispense with, fap and work by automatous
arrangement.
A chamber, may also be built on the top or side of the bot, air pipes to actjas a
receiver..
The pipes may be scraped externally by mechanical arrangements.or internally
when the air pipes are so arranged that the waste heat from boiler passes through
the pipes internally.
Dated this 20th day of December 1894.
Improved Means of Utilizing Waste Heat from Steam Boller
and other Furnaces.
I, JOHN HORROCKS of Ainsworth House, Ainsworth near Bolton, Bleacher
and Dyer, 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:-
My invention relates to arrangements for utilizing waste heat which has passed
from steam, boiler or other furnaces. and is. passing to the chimney, especially the
waste heat which has passed the water heaters commonly termed fuel economisers,
by applying such, waste, heat. to heat, the air to be supplied, to the furnace- or
furnaces for the combustion, of the fuel, therein, and my invention consists in
arranging in a flue or chamber, through which the waste heated gases pass, a series
of pipes or hollow, vessels, through which the air to be heated can pass while the
heated waste gases are on the exterior of such pipes or vessels, or the heated gases
may pass through the interior of the pipes or hollow vessels and the air to be heated
may pass on the exterior of such pipes or vessels which have suitable scrapers on
the surface acted upon by the waste gases.
I combine a steam jet, centrifugal fan or other. propeller. of air for forcing.or
drawing the cold, air through the heating arrangements, and supplying it to the
furnace, which according to my invention has practically no other supply of air.
Fig. 1, is a sectional elevation and Fig. 2, a plan sectional view and Fig. 3, a
partial longitudinal section of a boiler, illustrating the mode of carrying out my
invention, as applied to a two internal flued boiler a.

page_text: The heated gases from the furnace after leaving the boiler flues, pass to a.
chamber b, in which an ordinary water heating fuel economiser c, is placed and
after passing through the flue chamber c, for the economiser, it passes on to a
chamber d, into which an air heating arrangement according to my invention is
placed, which is formed by a series of vertical pipes e, the lower ends of each row
of which pipes e, are secured air tight, into a horizontal cross pipe e¹, which cross
pipes are closed at one end the other open ends coming into a closed chamber f,
into which cold or atmospheric air is or may be forced by a centrifugal fan or
other propeller of air g, so that the air passes from this closed chamber f, into the
ends of the horizontal cross pipes e', up the vertical pipes e, (the exteriors of which
are acted upon by the heated waste gases) and such air so heated enters a closed
chamber h, formed above the upper open ends of the vertical pipes e, and from this
chamber h, the heated air is conveyed by any suitable tube pipe or flue i, (which
may be formed, or part of it, in the brick work on the sides of the flues of the
boiler) to the mouth of the ash pit of each furnace.
Part of this heated air is or may be arranged to pass through holes (say one on
each side of the dead plate) to escape above the fire bars of the furnace such supply
of air to the furnace above the fire bars being regulated by any suitable damper or
valve or valves to be shut off (if desired) at a certain period after opening the
furnace door for supplying or stirring the fuel on the fire bars, in any well known
manuer.
1
The cover it, closing the end of the ash pit may be sliding or hinged doors, which
can be readily opened when required, to remove ashes therefrom, or for other
purposes, and when shut are air tight or practically so against internal pressure.
The furnace or fire door is also made to latch close when shut.
When working without the fan blast, the cold air chamber f, has or may have a
valve or door opening inwards, and this door or valve is opened when air is to be
supplied by the natural draught caused by the chimney.
In the ash pit below the fire or furnace bars a', (see Fig. 3) there are or may be
troughs to hold water the evaporation of which will help to keep the fire
bars a², cool.
Or in the case of internal furnace boilers there may be a partition a³, across the
lower part of the furnace que a*, near the fire bridge a³, extending about a foot
more or less upwards from the bottom side of the flue a, and a similar cross
partition a, at the open end of the ash pit, but there may be a short incline a®,
from the bottom of the flue a', to the top of this cross partition a³, so that ashes
from the pit or bottom of the flue a, may be readily raked from the pit and up
this incline a, and discharged over this partition or end a*..
The incline a, need not fit close to the bottom of the flue only sufficiently so to
keep back the cinders and ashes, while allowing the water to pass to the space
under the incline.
Pipes l, are applied for supplying water to the ash pits and there is or may also
be n pipe l, to draw off water from the ash pit when required.
In place of a pipe P, there may be a hole through the plate a, closed by a
simple plug or cork for drawing off water from the ash pit..
The air heating pipes e, have scrapers acting on their exteriors which are or
may be arranged and worked same as those well known for water heating
economisers, the soot thus removed falling into the pit j, for it below the air heating
tubes e. k, part of the flue leading to the chimney.
Having now particularly described the nature of my said invention and in what
manner the same is to be performed, I declare that what I claim is:-
1. The combination of arrangements with steam boiler and other furnaces for
heating air to supply the furnace or furnaces from the waste heated gases
passing to the chimney substantially as hereinbefore described and illustrated by
the drawings.
2. The combination of arrangements with steam boiler and other furnaces for

page_text: heating air to supply the furnace or furnaces by the waste heated gases which have
passed a water heating fuel economiser, substantially as hereinbefore described an i
illustrated by the drawings.
3. The combination of arrangements and apparatus substantially as and for the
purpose hereinbefore described and illustrated by the drawings.
Dated this Eighteenth day of September 1895.
PETER J. LIVSEY,
Agent.