Improvements in Means for Generating Heat in Steam Boiler and other Furnaces.
Year: 1890

page_text: Date of Application, 2nd June, 1890
Complete Specification Left, 28th Feb., 1891-Accepted, 4th Apr.,
1891
PROVISIONAL SPECIFICATION.
Improvements in Means for Generating Heat in Steam Boiler and
other Furnaces.
We, EDWARD BROADHEAD, Forgeman, of 51, Forshaw Street, WILLIAM
BEESLEY, Boiler Maker, of the Furness Boiler Works, and DAVID EVANS,
Manager of the Barrow Hematite Steel Co., Limited, all in Barrow-in-Furness, in
the County of Lancaster, do hereby declare the nature of this invention to be as
follows:-
gas
This invention has for its object an improved means for generating heat in steam
boiler and other furnaces. In carrying out our invention we introduce into the
furnace through a pipe or tube inflammable gas (preferably supplied from a
producer") and cause two or more currents of heated air to be directed upon the
incoming gas.
We arrange a furnace grate of ordinary construction sloped or
otherwise (but of somewhat less length than usual) below the gas and heated air
inlets and on the said grate we keep (as far as practicable) a bright glee coal or
coke fire. The flame of the fire ignites the incoming gas in the first instance and
the said fire-serves to warm the air admitted from underneath the grate into the
combustion chamber. We line the arch or crown of the said chamber with fire
clay or other suitable refractory material in order to protect (in the case of a steam
boiler furnace) the plate or plates nearest to the point where the intensity of the
combustion is greatest and also to the end that the gas may be readily re-ignited
by the retained heat of the refractory material when the gas supply has been
turned on again after the coal or coke fire has been stoked or re-charged with
fuel.
The heated air may be forced into the furnace by means of a steam jet or
"blower" or by any other convenient means and the said heated air may be caused
to receive its required heat by passing or conducting it through metal tubes so
arranged that the products of combustion passing along the furnace flue may
infringe upon the said tubes. The delivery portion of the tubes that is to say that
portion of them which adjoins or is within the combustion chamber is preferably
formed of refractory material.
The gas supply tube and the heated air tubes and steam jet may conveniently be
provided with suitable regulating or stop valves and regulating doors may also be
provided for regulating the inlet of cold air under the furnace grate.
Lune 1900
W. LLOYD WISE.
COMPLETE SPECIFICATION.
Improvements in Means for Generating Heat in Steam Boiler and
other Furnaces.
We, EDWARD BROADHEAD, Forgeman, of 51, Forshaw Street, WILLIAM
BEESLEY, Boiler Maker, of the Furness Boiler Works, and DAVID EVANS,
Manager of the Barrow Hematite Steel Co., Limited, all in Barrow-in-Furness, in
the County of Lancaster, 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 an improved means for generating heat in steam
boiler and other furnaces and this object we effect by assisting the combustion of
inflammable gas introduced into a furnace by directing upon the burning gas jets or

page_text: •
.
streams of atmospheric air. In carrying out our invention we introduce into the
furnace through a pipe or tube inflammable gas (preferably supplied from a
:: gas
producer") and cause two or more currents of heated air to be directed upon the
incoming gas. We arrange a furnace grate of ordinary construction sloped or
otherwise (but of somewhat less length than usual) below the gas and heated air
inlets and on the said grate we keep (as far as practicable) a bright glee coal or
coke fire. The flame of the fire-ignites the incoming gas in the first instance and
the said fire serves to warm the air admitted from underneath the grate into the
combustion chamber. We line the arch or crown of the said chamber with fire
clay or other suitable refractory material in order to protect (in the case of a steam
boiler furnace) the plate or plates adjacent to the point where the intensity of the
combustion is greatest and also to the end that the gas may be readily re-ignited by
the retained heat of the refractory material when the gas supply has been turned
on again after the coal or coke fire has been stoked or re-charged with fuel.
The heated air may be forced into the furnace by means of a steam jet or
"blower or by any other convenient means and the said heated air may be caused
to receive its required heat by passing or conducting it through a metal tube or
tubes so arranged that the products of combustion passing along the furnace flue
may impinge upon the said tubes. The delivery portion of the tubes that is to say
that portion of them which adjoins or is within the combustion chamber is preferably
formed of or may be surrounded by refractory material.
The gas supply and the heated air tubes and steam jet may conveniently be
provided with suitable regulating or stop valves and regulating doors may also be
provided for regulating the inlet of cold air under the furnace grate.
In the accompanying drawings,
Fig. 1 is a sectional side view, and
Fig. 2 a sectional plan view in which is shown a method of applying our invention
to the furnace of an ordinary form of steam boiler.
"
a is the pipe or tube through which the "producer or other gas is introduced
into the furnace chamber F, and are branch pipes from whose extremities ee the
heated air is directed upon the incoming gas (the direction of the air and gas being
indicated in the drawings by small arrows). is the furnace grate and the lining
of refractory material with which the arch or crown of the furnace chamber 'is
preferably covered or protected. is an ordinary form of steam jet or blower; gis
a supply steam pipe and d a valve which may conveniently be operated or controlled
from the front of the boiler by the handle through the medium of a chain and
pulley arrangement such as that indicated at Fig. 1. The heated air supply pipe j
may be arranged within the furnace flue B in a zig-zag manner as shown in the
drawings or in a helical or other form as may be found suitable for receiving heat
from the passing products of combustion and so raise the temperature of the-air
supply travelling through the said pipe towards the furnace chamber F. The
branch pipes may if found necessary be surrounded (or protected from the
intensity of the heat) with refractory material although they are not so shown in
the drawings. kk are doors for regulating the inlet of cold air under the furnace
grate and m is a fire-hole door of the usual kind through which the fuel is
supplied to the furnace and the stoking thereof effected.
Figs. 3 and 4 are sectional side and plan views respectively shewing an arrange-
ment of the hot air supply to the incoming gas in which three branch pipes bb
are employed. The air from the pipes bb may be directed upon the gas either in a
single jet as shewn at Figs. 1 and 2 or through a number of small openings as
shown at Figs. 3 and 4.
Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, we, declare that what we
claim is :-
1. In a steam boiler or other furnace causing heated air to be directed upon
inflammable gas as it enters within the furnace chamber over a fire thereintain

page_text: manner substantially as hereinabove described and shown in the drawings for the
purpose set forth.
2. In a steam boiler or other furnace the combination with a grate such as fand
of a fire burning thereon of a gas supply inlet such as a and two or more heated air
inlet pipes such as bb arranged to operate substantially as hereinabove described
and shown in the drawings for the purpose set forth.
3. In a steam boiler or other furnace the combination with inlet heated air pipes
such as 66 of one or more conducting pipes arranged within the furnace flue to
receive heat from the passing products of combustion and a steam jet or blower to
force atmospheric air through said conducting pipe or pipes into the furnace
chamber substantially as hereinabove described and shown in the drawings for the
purpose set forth.
Dart as good way of February
1031.
W. LLOYD WISE,
Per F. J. Brougham,
46, Lincoln's Inn Fields, London, W.C., Agent for the Applicants.