IMPROVEMENTS IN APPARATUS FOR BURNING LIQUID FUEL, IN FURNACES, ESPECIALLY APPLICABLE TO THE FURNACES OF MARINE BOILERS
Year: 1885

page_text: I CHARLES BLAGBURN of 150, Leadenhall St London E.C. Engineer, do hereby
declare the nature of my invention for IMPROVEMENTS IN APPARATUS FOR BURNING
LIQUID FUEL, IN FURNACES, ESPECIALLY APPLICABLE TO THE FURNACES OF MARINE
BOILERS, to be as follows:-
The object of this invention is to burn liquid fuel, such as petroleum in Furnaces,
especially in the Furnaces of Marine Boilers, to which the following description
more particularly refers.
Instead of injecting the liquid fuel through the front of the Furnace as has
hitherto been the practise, I inject it through the back of the Furnace. The object
of this is to secure more effectual combustion of the fuel, and to bring the hot gases
more effectually in contact with the heating surface of the Boiler.
To obtain an efficient circulation of the hot gases, I place inside the Furnace
and lying at the bottom of it a cylinder of fireclay, or other suitable material.
The jet of liquid fuel is arranged to shoot along the axis of the cylinder, the stream
of burning gases passes out at the other end of the cylinder ascends to the top of
the furnace and passes back through the crescent shaped space between the fireclay.
cylinder and the top sides of the Furnace, and thence into the Combustion Chamber
& through the tubes or pipes in the usual manner.
The Furnace door is made large enough to remove the fireclay cylinder, and is
lined inside with fireclay to protect it from the action of the hot gases projected on
it from the other end of the cylinder. In addition to regulating the circulation
this cylinder is intended to act as a regenerator.
The oil may be forced through the injector or spray producer by a pump, com-
pressed air, or steam. Before arriving at the injector it may be passed through a
superheating apparatus in the Boiler. The injector is arranged to mix the air with
the oil so as to produce a fine spray, and also to draw any additional quantity of
air required for combustion. Additional regulated air holes are also made in the
Furnace door to admit more air if necessary to complete the combustion of the
gases above the fireclay chamber.
The Air and Oil may also be injected by steam.

page_text: I CHARLES BLAGBURN of 150 Leadenhall Street London E.C. Engineer do hereby
declare the nature of my invention for BURNING LIQUID FUEL IN FURNACES and
in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:-
The object of my invention is to burn liquid fuel, such as petroleum, in furnaces,
especially in furnaces of marine boilers, to which the following-description more
particularly refers.
:
Instead of injecting the liquid fuel through the front of the furnace, as has
hitherto been the practice, I inject it through the back end of the furnace. The,
object of this is to secure more effectual contact with the heating surface of the
boiler, and more efficient regulation of the oil jet, the injector being in the engine
room under the inmediate charge of the engineer.
To obtain an efficient circulation inside the furnace, of the flame and hot gases,
I place inside the furnace and lying at the bottom of it, a cylinder or cylinders of:
fireclay or other suitable material. The jet of liquid fuel is arranged to shoot
along the inside of the cylinder in the direction of its axis, the stream of burning:
gases passes out at the other end of the cylinder ascends to the top of the furnace
and passes back through the space between the fireclay cylinder and the top sides
of the furnace and thence into the combustion chamber, and through the tubes or
pipes in the usual manner, coverings of fireclay, firebrick or other suitable material
being provided at any places which require protection from the flame. The
furnace door is made large enough to allow of the removal of the fireclay cylinder
and is lined inside with fireclay, firebrick or other suitable material to protect it
from the action of the hot gases projected on it from the other end of the cylinder.
In addition to regulating the circulation this cylinder is intended to act as a
regenerator.
The fireclay cylinder may be made of any suitable section or in segments or
lengths to admit of removal and replacement. A cone of any suitable section
could be used instead of a cylinder.
The oil may be forced through the injector or spray producer either by a pump,
compressed air, or steam. Before arriving at the injector the oil may be passed
through a superheating apparatus in the boiler. The injector is arranged to mix
the air with the oil so as to produce a fine spray, and also to draw any additional
quantity of air required for combustion. The air and oil may also be injected
by steam.
..
3
Additional regulated air holes are also made in the furnace door to admit air if
necessary to complete the combustion of the gases above the fireclay cylinder.
The injector or spray producer may either be inserted into the back end of the
furnace through a tube passing through the water space or may be fixed in the
back of the furnace itself. Peep holes are made at the back of the boiler to admit
of inspection and regulation of the jet.

page_text: In order that my said invention and the manner of performing the same may
be properly understood I hereunto append one sheet of explanatory drawings to be
hereinafter refered to, and representing my improved apparatus.
Fig. 1 is a longitudinal section' through a marine boiler and Fig. 2 is a half
elevation of the hack and half section through the line A. B on Fig. 1.
The injector I is inserted into the back end of the furnace through a tube fixed in
the water space between the end plate of the shell and the plating of the combustion
chamber. The fireclay cylinder F. F. is laid, preferably in short lengths, on the
bottom of the furnace arranged so that the gases can pass out at the front end
between the firebrick lining of the furnace door and the end of the cylinder.
An air passage is shown at P. through which air is admitted to the space
between the top of the fireclay cylinder and the furnace crown. The admission of
air is regulated by the holes at H. Peep holes can be arranged as shown at D for
inspecting the inside of the furnace.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the said is to be performed, I declare that
what I claim is :-
1. In combination with the furnace of a boiler, an injector or spray producer,
placed at the back end of the furnace and discharging a jet of liquid fuel or flame
towards the front end of the said furnace.
2. In combination with the furnace of a boiler a hollow cylinder or cone of
circular or any suitable section, made of fireclay, or other suitable material, through
which a jet of liquid fuel or flame is made to pass as herein before described.
Dated this fifteenth day of September 1886,