Steam Generator and other Furnaces.
Year: 1888

page_text: Date of Application, 5th Apr., 1888
Complete Specification Left, 24th Nov., 1888
Complete Specification Accepted, 31st Dec., 1888
Steam Generator and other Furnaces.
We WILLIAM PAYNE WHITE of College Chambers, High Holborn, London, in the
County of Middlesex, Agent, and ROBERT WALLBANK of 42 Back Commission Street,
Bolton-le-Moors, in the County of Lancaster, Operative, do hereby declare the nature
of this Invention to be as follows:
Our Invention relates principally to the furnaces of steam generators and has for
its object to lessen the production of smoke by promoting the more perfect com-
bustion of the gases which are developed from the burning fuel in the furnaces as is
well understood. To this end we deliver air into the restricted space above the
bridge or into a part of the flue near this point the current of air being induced
by the action of a fan or blower which is operated by a wheel or steam turbine which
is acted upon by a jet or by jets of steam, or the fan or blower is directly acted upon
by the steam. The air is preferably heated on its way from the fan to the point of
delivery. This heating may be effected by passing the air through pipes mounted
within the side flues or within the bottom flues or within the back or internal flue or
flues or by passing the air through pipes situated in two or more of such positions
or the air may be heated by being passed through passages formed in the seating
of the generator. We may pass the air through pipes which extend through the
steam and water spaces of the generators and deliver the air above the bridge. A jet
or two or more jets of steam is or are caused to act upon a steam turbine which
is fixed upon the fan or blower shaft or is connected therewith so that a current
of air is forced through the pipe or pipes. The air may be delivered through a
peforated pipe or through nozzles or through the aperture or apertures in a split
bridge or otherwise as considered to be advisable. The heated air mingling with
the gases or products of combustion of the fuel effects the more complete combustion
.

page_text: of the carbon and thereby prevents or lessens the production of smoke and effects
an economy in the consumption of fuel. Our Invention although designed principally
for use in connection with steam generator furnaces may be applied to other furnaces
for which it may be suitable. We may provide means for driving the blower at the
times when or in the cases wherein steam is not available. The steam actuated blower
may be applied to increase the natural draught as for example it may be applied
to increase the draught through a locomotive funnel or from the smoke box of a
marine boiler.
Dated thin 1th da CA
1 1000

page_text: Steam Generator and other Furnaces.
We WILLIAM PAYNE WHITE of College Chambers, High Holborn, London, in the
County of Middlesex, Agent, and ROBERT WALLBANK of 42 Back Commission Street,
Bolton-le-Moors, in the County of Lancaster, Operative 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 and accompanying
drawings:
:-
Our Invention relates principally to the furnaces of steam generators and has for
its object to lessen the production of smoke by promoting the more perfect com-
bustion of the gases which are developed from the burning fuel in the furnaces as is
well understood. To this end we deliver air into the restricted space above the
bridge or into a part of the flue near this point the current of air being induced by
the action of a fan or blower which is operated by a wheel or steam turbine which
is acted upon by a jet or by jets of steam, or the fan or blower is directly acted
upon by the steam or may be driven by other means. The air becomes heated on its
way from the fan to the point of delivery. The heated air mingling with the gases
or products of combustion of the fuel effects the more complete combustion of the
carbon and thereby prevents or lessens the production of smoke and effects an
economy in the consumption of fnel. Our Invention although designed principally
for use in connection with steam generator furnaces may be applied to other furnaces
for which it may be suitable.
In order that our said Invention may be properly understood we will now proceed
more particularly to describe the same with reference to the annexed drawings in
which Fig. 1 is a sectional view of a portion of the shell and flue of a steam boiler
to which our invention is shown applied.
In the said Figure a is the shell of the boiler, 6 is the flue, c is the bridge and d is
the furnace grate. The pipe whereby the air is led to the furnace is marked e. The
said pipe is situated above the bridge and over the front thereof so as to command
the smoke and products of combustion as they are passing or about to pass over the
bridge c. We at present consider the position of the pipe as indicated in the
drawing to be most favourable to the purposes of our invention but we do not
confine ourselves to this position as it might be placed further back or further
forward. The pipe e extends through the boiler space to the outside of the boiler
where it is connected with another pipe e' which is surmounted by or placed in
communication with a fan for other air forcing or blowing apparatus suitable for
creating a current of air downward into the flue. The fan is preferably driven
by a jet of steam led by the pipe g from the boiler or from another source of pressure
which jet of steam impinges upon the tips of the vanes and rotates the fan
draw a supply of atmospheric air and force it through the pipes
flue. The steam jet may be governed or cut off by a valve g¹. In its passage
e
so as to
into the

page_text: through the pipe e the air becomes heated and is discharged above the bridge
upon the smoke and heated products of combustion causing them to burst into
flame.
The emission of smoke is thereby prevented and the fuel burned in the furnace is
more completely utilised. Instead of operating the fan f by a jet of steam as
described we might drive it by a belt and pulley in the ordinary manner and as
indicated by the dotted lines in the drawing. Instead of leading the air pipe e
directly through to the flue and bridge as shown in the drawing we might lead it
from the front or back or from another part of the boiler. For example in the
drawing we have indicated in dotted lines the position of the pipe when extended to
the front of the boiler the said dotted lines being marked e³. The air forcing
apparatus would in that case be fixed at or near the point where the pipe e³ enters the
shell and as indicated by the dotted lines f'. We do not however restrict ourselves
to the position or direction of the air pipe as it might be introduced into the boiler
at any suitable point and led in any desired direction so long as it is caused to
discharge into the flue and above the bridge in the manner indicated. To regulate or
to cut off the supply of air to the furnace we place a throttle valve i in the pipe e¹
which is opened and closed by a weighted lever and chain or by any other suitable
.means. For the purpose of presenting more heating surface the air pipe might be
made in the form of a coil or with radiating fins or of other forms suitable for
increasing its air heating powers. In the cases of boilers having more than one
furnace each furnace may be supplied by a separate fan or one fan may supply air to
two or more furnaces. The diagram Fig. 2 indicates how a single fan may supply
air to two furnace flues by means of a breeches pipe fixed either inside or outside of
the boiler as preferred. Provision may also be made for permitting expansion and
contraction of the air pipe or pipes without straining the pipes or the boiler. More
than one air pipe may be used for each flue. The invention is applicable to furnaces
other than those of steam generators.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what
we claim is :-
The means for facilitating the combustion of smoke in steam generator and other
furnaces consisting of an air pipe or air pipes led through the steam and water
space of the generator and placed in communication with a fan or other air
forcing or blowing apparatus driven by a jet of steam from the boiler or by
other means and impelling a current of air through the pipe or pipes the said
air current being heated in its passage through the pipe or pipes and finally
discharged into the furnace flue and above the bridge so as to facilitate the
combustion of the smoke, gases and heated products of combustion substantially
as herein before described and as illustrated in the accompanying sheet of drawings.
Dated this 23rd day of November 1888.
DUTTON & FULTON,
1, St. James Square, Manchester,
Agents.