A Method of Improving the Circulation and Combustion of Gases, and Consuming the Smoke in Cornish, Lancashire, and similar Internally Fired Boilers.
Year: 1895

page_text: Date of Application, 4th Sept., 1895
Complete Specification Left, 4th June, 1896-Accepted, 4th July, 1896
PROVISIONAL SPECIFICATION.
A Method of Improving the Circulation and Combustion of Gases,
and Consuming the Smoke in Cornish, Lancashire, and similar
Internally Fired Boilers.
JOHN ETESON ROBINSON, 208, Barnsley Road, Sheffield, in the County of York
Mechanical Engineer, do hereby declare the nature of this invention to be as
follows:-
The invention consists of one or more circular discs with pointed ends, made of
firebrick or other material, supported or suspended in the internal flues of Lancashire,
Cornish or similar internally fired boilers, at the back of the furnace bridge, and
so placed that there is a concentric or eccentric annular space between the periphery
of the discs and the flue plates, and so that the space between the furnace bridge and
the first disc forms a combustion chamber, also another combustion chamber between
the first and second discs, and so on, if further extended. The objects being the
complete admixture of the furnace gases, and with any air that may be introduced
through the bridge, and to cause the combustion to take place as near as possible to
the periphery of the flue.
Dated this 3rd day of September 1895.
A Method of Improving the Circulation and Combustion of Gases,
and Consuming the Smoke in Cornish, Lancashire, and similar
Internally Fired Boilers.
I, JOHN ETESON ROBINSON, of 208, Barnsley Road, Sheffield, in the County of
York, Mechanical Engineer, do hereby declare the nature of my said 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 consists of one or more circular discs with pointed ends, made of
firebrick or other material, supported or suspended in the internal flues of Lancashire,
Cornish, or similar internally fired steam boilers at the back of the furnace bridge,
and so placed that there is a concentric or eccentric annular space between the
periphery of the discs and the flue plates, and so that the space between the furnace
bridge and the first disc forms a combustion chamber, also another combustion
chamber between the first and second discs and so on, if further extended. The
objects being the more complete admixture of the furnace gases, with any air that
may be introduced through the bridge, and to cause the combustion to take place as
near as possible to the periphery of the fluc.
My invention will be better understood on reference to the accompanying sheet of
drawings, in which,
Fig. 1, is a longitudinal section of a furnace flue of either a Lancashire or a
Cornish steam boiler, shewing the fire bars, the bridge, and two of my circular discs,
the first being pointed at the front end and the second being a modified forin pointed at
both ends.
0

page_text: Fig. 2, is an enlarged longitudinal section of one of these discs shewing how they
may be made hollow and put together in halves or in segments and supported by
fire brick stands or feet.
Fig. 3, is a plan of the lower half of the same on the line A. B. (Fig. 2).
Fig. 4, is a cross section of the disc and boiler furnace flue taken on the line, C. D..
(Fig. 2).
The same letters refer to similar parts throughout the several views.
a, is the upper half of one of my circular discs made in segments.
b, is the lower half of the same which may be made either in one piece or in
segments.
c, c, are the fire brick stands or feet supporting the discs.
In some cases I employ the interior of these discs as air heating chambers and in
such cases I provide a hole, d, in the lower half of the disc for the inlet of the air,
and smaller holes, e, e, for the outlet and distribution of the air after it has been
heated. When I employ air in this way I convey it in a pipe, f, through the lower
part of the fire bridge, g, to the under half of the disc, into which it is directed
through a branch pipe, h, which is inserted through the hole, d, of the disc. The air
thus conducted I sometimes force through the pipe, f, by means of a steam jet, fan,
or by other form of blast.
i, i, are the furnace flue plates.
,, are the fire bars.
In some cases I construct these discs pointed or tapered at both ends as shewn in
the second disc from the bridge, Fig. 1, so that when the front end has been worn or
cut by the action of the heated gases I can turn round the disc so that the end which
has been less worn can be made to face the gases coming over the bridge and in this
form I should place holes for the exit of the air both at the front and at the back of
the disc, any of which holes being easily closed by fire clay or clay plugs as may be
found convenient.
From the foregoing description it will be seen that the gases and other products
of combustion coming over the bridge, y, on meeting with the resistance offered by
the body of the first disc have their velocity momentarily checked so that a better
mixture of the gases takes place in what may be called the combustion chamber
or space between the bridge, 9, and the nose of the first disc, after which the
gases pass along the annular space between the disc and the plates of the flue, i, i,
thereby being brought into close contact with the effective heating surface. On
passing the first disc the combustion can be further completed by the admixture
of heated air discharged from the interior of the disc, the quantity of air so
discharged being regulated as required.
Where two or more discs are employed the passage of the gases is further
directed and combustion assisted by the additional disc or discs in the manner
described in conjunction with the first disc.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is.
1. In the furnace flue or flues of a Cornish, Lancashire, or similar internally
fired steam boiler, the application of one or more circular discs made of fire brick
or other suitable refractory material, one or both ends of which discs being pointed,
and so supported or suspended in the said flue or flues at the back of the furnace
bridge as to leave a concentric or eccentric annular space between the periphery
of the disc or discs and the plates of the said furnace flue or flues in the manner
and for the purposes substantially as herein described and illustrated.
Dial 1:1 JCI 1902
R. HEBER RADFORD,
Agent for the Applicant.