Improvements in Furnace Smoke Consuming Arrangements.
Year: 1891

page_text: Date of Application, 5th Feb., 1891
Complete Specification Left. 21st Mar., 1891-Accepted, 6th June, 1891
PROVISIONAL SPECIFICATION.
Improvements in Furnace Smoke Consuming Arrangements.
I, JOHN PAYNE of Burton Weir, Rotherham in the County of York Works
Manager do hereby declare the nature of this invention to be as follows:
-
I form an air channel on each side, and along the whole length of the fire
through which channel the air passes into the bridge at the back of the fire.
This bridge is made hollow with an elongated opening at the back.
The air becomes heated by passing along the channel and through the bridge
at the back of fire, and on issuing through the opening consumes the smoke.
Dated this Fourth day of February 1891.
JOHN PAYNE,
COMPLETE SPECIFICATION.
Improvements in Furnace Smoke Consuming Arrangements.
I JOHN PAYNE of Burton Weir Rotherham in the County of York Works
Manager for Messrs. George Wright & Co. of Rotherham 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 the consumption of smoke in furnaces and close
fires by the introduction of highly heated air in a thin stream through the upper
part of the bridge and preferably at the back of the bridge.
In carrying out the invention, as applied to the furnaces of a steam boiler for
example such as illustrated in the drawings annexed in which
Fig. 1, is a cross-section of the tube and fire bars looking towards the bridge.
Fig. 2, a perspective view from front of flue.
Fig. 3, a longitudinal cross section of flue.
Fig. 4, a plan of fire bars and, section of bridge, and in which like letters of
reference indicate like parts in any of the figures; I form an air channel C at each
side and along the whole length of the fire by taking out the second grate bars from
each side of the fire space, and inserting in the space what I call the hot air
generator A. A. which consists of one or more lengths of outwardly curved plates
of cast metal or other suitable material as seen in Fig. 1, and 2, the upper edge
being carried up to the side of the flue, (or the wall of the furnace as the case
may be).
I also remove the first grate bar from each side at the end nearest to the furnace
front E, and thus form an opening through which a stream of air can pass into
the air channel C, and forward through an opening communicating with the interior
of the bridge B.
I prefer to make the bridge in two parts, namely the bridge proper marked B,
and the shoe on which it stands, marked B', and which also forms the back.
The bottom edge of the bridge proper B, rests upon the base or shoe B¹ which
is preferably made with a recess, so as to retain the part B in position; the upper
part of B being supported at the ends only.
The top edge of B, and B', are constructed to leave an elongated opening or
mouth D, tapering in width from the centre towards each end, and forming the air
outlet into the flue, the said opening being situated at the back of the bridge, or
in such a position that ashes or other refuse from the fire cannot easily get inside.
The air being highly heated in its passage through the air channel C, enters the
chamber or interior of the bridge B, B', and passing out of the horizontal opening D,
ד

page_text: is projected upwards in a broad even stream meeting and mixing with the smoke'
and thus causing perfect combustion.
I do not bind myself to the use of any particular material or method of con-
structing the various parts before mentioned, as they may be of metal protected
or otherwise, or of brick or of a combination of metal and brick or other refractory
material and either in one piece or in segments.
The shape of the generators and bridge may be varied according to circumstances,
for instance in furnaces reverbatory or otherwise where no grate bars are used,
the foot of the generator may rest on the surface of the hearth, or it may be
passed through it from the outer air instead of from below. In some cases the
bridge may be suspended from above.
I find in practice that although the area of the fire or grate bar surface is thus
reduced and consequently less fuel is used the effective power of the boiler is
considerably increased, this being due to the more perfect combustion of the sinoke
and gases on the far side of the bridge.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I wish it to be under-
stood, that I do not claim either a hollow bridge with openings, or a conduit to
carry heated air to the said bridge broadly, as I am aware that such arrangements
have been previously described but I declare that what I do claim is
The method of and means for causing the more perfect combustion of smoke in
furnaces by constructing air channels forming the side or sides of the fire, through
which channels the air is conducted and consequently heated in its passage, in
combination with the hollow bridge through which the air is emitted, as herein
before described and illustrated.
Dated this 20th day of March 1801
JOHN PAYNE.