Improved Means for Supplying or Feeding Boiler and other Furnaces with Liquid Fuel.
Year: 1889

page_text: Improved Means for Supplying or Feeding Boiler and other
Furnaces with Liquid Fuel.
I, GEORGE ROBERT YOUNG of 6 Oxford Terrace New Charlton Kent, Engineer, do
hereby declare the nature of this invention to be as follows :-
"
"
worm or
In accordance with my Invention say in the case of a steam boiler furnace I
make use of a cylinder provided internally with what is known as a
"coil ".of copper pipe and in addition with an inlet to which adapted a a suitable
strainer or sieve-for the entry therein of the liquid fuel to be fed to the furnace or
fire; The liquid fuel enters the cylinder by this last described inlet. Live steam is
then caused to enter the copper coil" or worm and passing therethrough raises the
temperature of the liquid fuel then leaving the "coil" or worm at the same end
::
"
of the cylinder is caused to enter a chamber at the opposite end of the cylinder; from
this chamber are three outlets each of which has a connection, not alone with the
steam chamber above referred to, but also with the main part of the cylinder,
containing the liquid fuel, but, arranged in such a manner that the steam cannot
enter the part of the cylinder containing the liquid fuel neither can the liquid fuel
enter the steam chamber, at the opposite end of the cylinder are situated handles
attached to three rods which actuate the valves closing the aforesaid three outlets.
The manner in which the liquid fuel is caused to enter the furnace under the action
of steam is as follows in each of the nozzles where the steam and liquid fuel leave the
cylinder is a small central hole serving as an outlet for the liquid fuel and the steam
is allowed to escape not through this hole but through two semicircular apertures
surrounding the aforesaid exit for fuel, and, thus by the action of the steam the liquid
fuel is caused to reach the furnace.
The aforesaid outlets for liquid fuel vary in size as may be found necessary, say, in
regard to the amount of liquid fuel it is required to bring to the furnace under the follow-
ing conditions; first, when the fire on which the liquid fuel is to be thrown is very low,
and it is required to brighten or increase the same; second when the fire has to be
increased to a certain stage so as to produce in the boiler a required pressure of
stean, third when the fire and consequently the boiler pressure are in the required
condition and it is only needed to feed fuel so as to maintain the fire at that
heat.
I have referred to in a preceding paragraph a strainer placed in the inlet, for
liquid fuel, into the cylinder and in order that this strainer, when choked with the
refuse from the liquid fuel, may be perfectly cleaned I so arrange a stop cock and
pipe leading from the steam pipe that steam unay at its full pressure be blown
directly into the cylinder, and through the meshes of the strainer thus sending back
all refuse" into the tank holding said fuel, and this operation may be performed
without interfering, except for the space of one or two seconds of time with the action
of the device in feeding fuel to the furance.

page_text: Improved Means for Supplying or Feeding Boiler and other
Furnaces with Liquid Fuel.
I, GEORGE ROBERT YOUNG, of 6 Oxford Terrace, New Charlton, in the County of
Kent, Engineer, 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 :-
My invention relates to apparatus for feeding tar, pitch oil and other viscous
hydrocarbons or liquid fuel into steam-boiler and other furnaces, and is designed to
improve the construction of such apparatus.
An important feature of my said invention consists in providing a jet of steam at
the top and bottom of the discharge nozzle for drawing out or inducing a current
of the tar, oil or other liquid fuel and introducing it in the form of spray into the
furnace.
To
Another important feature of my said invention is the provision of means for
separating from thetar, oil orother liquid fuel any impurities, and any ammonia or water
that may be contained therein. For this purpose, I provide a cylindrical or other
suitably shaped chamber or receptacle for the said liquid fuel and a suitable strainer
or filter through which the said liquid fuel has to pass before reaching the said
chamber or receptacle thus removing any dirt or foreign matter therefrom.
separate any ammonia or water that may be contained in the said liquid I connect
the steam pipe which conveys the steam to the space around the nozzle or discharge
aperture to a coil placed in the said chamber or receptacle, the heat from the said
coil serving to separate the said ammonia or water. Another important feature of
my said invention consists in providing for blowing impurities back into the tank
from which the tar, oil or other liquid is supplied and for clearing the valve and its
seating and other parts of the apparatus from deposits or impurities that may have
accumulated thereon, by permitting steam to pass through the herein before mentioned
cylindrical chamber or receptacle.
My said invention moreover comprises other improvements hereinafter set forth.
In the accompanying drawings I have shown how my said invention may be
- conveniently and advantageously carried into practice.
Figure 1 is a vertical longitudinal central section showing one form of my improved
apparatus.
Figures 2 to 4 are views drawn to an enlarged scale showing details of construction
hereinafter described.
Figures 5 to 7 are views drawn to a reduced scale showing an improved arch
hereinafter described.
Like letters indicate corresponding parts throughout the drawings.
A is the cylindrical or other suitably shaped chamber or receptacle for the tar,
oil or other liquid which is provided with suitable doors or covers A'; B is a pipe
communicating with any suitable supply of tar, oil or other liquid fuel. C is a
strainer or filtering chamber placed between the said pipe and the chamber or
receptacle A. D is another pipe communicating with any convenient source of
steam supply.
The pipes B and D are provided with suitable stop cocks or valves a, a¹ for
regulating the supply of liquid fuel and of steam to the chamber or receptacle A.
b is a valve having taper V-shaped grooves b₁ and a rod or stem c. d is the
discharge nozzle which is firmly attached to or formed with one of the covers A¹, the
projecting portion of the said nozzle is formed oval in transverse section and
extends into a round hole A2 provided in a plate A³ secured to the said cover A¹.
By forming the extremity of the discharge nozzle d oval or elongated in transverse
section and causing the latter to project into a round hole A in the plate A³,
crescent shaped apertures are provided above and below the said discharge nozzle d
as shown in figure 2 through which steam is discharged as hereinafter described to

page_text: induce a current of tar, oil or other liquid from the discharge nozzle d. The said
valve bis provided with a suitable seating in the said discharge nozzle d. and the
rod or stemic passes through a stuffing box e and gland c', and is provided with a
convenient handle c' by means of which the said valve b. can be moved to or from its
seating in the said discharge nozzle d. An oval hole is moreover provided throughout
the entire length of the said rod or stem c, and of the valve b. is another rod
passing through the said hole c² and corresponding in shape therewith. One
extremnity of the said rod is provided with a handle f', and a stuffing-box and
glaud ct is provided in the boss of the handle c¹ of the rod or stein c so as to form
a tight joint around the said rod f. The other extremity of the said rod ƒ projects
through the discharge nozzle d and is provided with taper V-shaped grooves f². The
extent to which the said rod projects through the aperture in the discharge
aozzle d can be regulated by means of the hamile and by reason of the taper
formation of the grooves the amount of opening in the said nozzle for the passage of
the liquid fuel can thus be very accurately regulated.
The steam supply pipe D is connected to one of the doors or covers A' and
communicates with one extremity of a coil D' situated in the said chamber or
receptacle A. The other extremity of the said coil is connected by means of a
pipe D with a conical recess or chamber daround the discharge nozzle d. g is a
stop cock or valve which is connected to the pipe D2 or with any other suitable
source of steam supply so that steam may be admitted into the chamber or
receptacle A to clear away any deposits that may have accumulated upon the
valve bor upon its seating, or to drive back any impurities that may have
accumulated in the chamber or receptacle A or in the filtering chamber C into the
supply tank, by blowing steam through the said chamber or receptacle A...
The filtering chamber C is provided with a suitable strainer C or other means
for retaining any impurities that may be contained in the tar, oil or other liquid
delivered through the supply pipe B. The strainer C¹ is made with a central hole so
that when the space between the said strainer and the wall of the filtering chamber
becomes filled with foreign matter, the liquid can flow through the said central
hole.
The operation of the apparatus is as follows, that is to say :-The admission of
tar, oil or other liquid fuel to the chamber or receptacle A is regulated by means of
the stop cock or valve, and the valve and the rod f being properly adjusted so as to
permit the desired amount of the liquid to pass through the discharge nozzle d, the
stop-cock or valve a' is opened and steam from the supply pipe D is allowed to pass
through the coil D₁ and pipe 12 to the conical recess or chamber d from which it
passes out through the crescent-shaped portion of the hole A2 formed by the oval
or elongated portion of the nozzle d projecting therein, and draws or induces a
current of the tar, oil or other liquid through the said discharge nozzle. The
crescent shape of the steam apertures in the plate A and the fact of the said steam
apertures or passages being situated above and below the discharge nozzle d is found
to be of great advantage, inasmuch as it tends to induce a stronger and more
regular current of the liquid fuel through the discharge nozzle d, and moreover the
said discharge nozzle having an aperture elongated in transverse section provides for
spreading the said liquid fuel so that the latter is delivered into the furnace in the
form of a fine spray.
When it becomes desirable to remove any deposit that may have accumulated upon
the valve b or upon its seating, or in the aperture or passage of the discharge nozzle d,
the stop cock or vaive a is closed, and the stop cock or valve g being opened steam
is admitted into the chamber or receptacle A and allowed to pass through the said
discharge nozzle, thus effectually clearing away any obstructions that may exist
upou the valve or upon its seating in the nozzle d, or in the passage through
the said nozzle. When it is desired to remove any deposit of impurities or obstruc-
tions that may have accumulated upon the strainer C in the chamber C or in the
chamber or receptacle A, the valve b is closed, and the stop cock or valve a is opened,
and the steam admitted through the stop cock or valve g is permitted to pass

page_text: through the chamber or receptacle A and the filtering chamber C thus driving any
foreign bodies or other impurities back into the supply tink.
My apparatus for feeding liquid fuel into furnaces comprises many important
advantages as compared with the arrangement heretofore usually adopted in apparatus
of this kind or class. Amongst others, may be mentioned the employment of the
crescent shaped apertures or passages herein before mentioned for the steam, which is
intended to induce a current of tar, oil or other liquid through the discharge nozzle.
This arrangement is much more efficacious than those commonly employed in which
the steam is passed through a nozzle entirely surrounded by a circular passage for the
liquid fuel, or through a circular passage entirely surrounding a nozzle having a
central way or passage for the liquid fuel. In the first of these arrangements
inconvenience is frequently experienced, should the steam pressure become reduced
below a certain point, owing to the liquid fuel not being carried along with the said
In the second arrangement the
steam but dropping to the bottom of the furnace.
current of liquid fuel induced by the jet of steam entirely surrounding the same is
subject to variations and is auting in strength and regularity, and is moreover open
to other objections. By my invention we obviate the above defects, and provide for
spreading the jet of liquid fuel and thus increasing its efficiency. Moreover should
the stean passages become worn the plate in which they are formed can be readily
removed, and another one substituted in its place.
When constructed as shown in the drawings, my apparatus has the further
advantage that, on breaking the joint of the cover at one end of the chamber or
receptacle A and uncoupling the parts of the pipe D², the coil and the valves can be
readily removed with the said cover.
I sometimes provide for the removal, when desired, of my apparatus' from its
operative position in front of the furnace. For this purpose I employ telescopic
pipes for the supply of the steam and oil to the chamber or receptacle A, that is to
say, I arrange the pipes B, and D to slide up and down in larger pipes B¹, D¹
provided with suitable stufling boxes. By this arrangement I am enabled to readily
raise the apparatus out of the way and thus leave a clear space in front of the
furnace. To facilitate the raising of the said apparatus we sometimes attach thereto
one end of a chain or rope which is passed over a pulley and has attached to its
other end a suitable counterweight.
The top or arch of the furnace in which the spray of fuel is to be used, is in some
cases, lined with fire bricks, small apertures being left between adjacent bricks.
This lining serves as a reservoir or accumulator for the heat and ensures more
effectual combustion of the fuel; the said lining, moreover, prevents the direct action
of the flame upon the boiler-plates.
In other instances I arrange at suitable distances apart, in a furnace provided with
my improved apparatus for the supply of liquid fuel thereto, fire-brick or fire-clay
arches, a narrow space being left between the said arches and the top of the furnace,as
ahown in figures 5 and 6 in which E is the furnace, E are the fire-bars and F, F
are the arches of refractory material. To overcome the injurious effects of the
expansion and contraction of these arches of refractory material by the heating and
cooling of the same, 1 sometimes make each arch of two or more parts formed and
arranged as shown in figure 5 or as shown in figure 7, or in any other suitable
manner.
Although I have herein before described a couvenient and advantageous method of
carrying my said invention into practice it is obvious that I can, somewhat modify
the construction of my apparatus without departing from the nature of our said
invention.
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
First. The combination, with the chamber or receptacle provided with the discharge-
flon fan ihn liamid fuel

page_text: Second. The combination, with the chamber or receptacleprovided with thedischarge-
nozzle, of a steam coil for heating the liquid fuel in the said chamber or receptacle,
for the purposes above specified.
Third. The combination, with the discharge-nozzle, of crescent-shaped or other
steam passages, above and below the said nozzle, for the purpose above specified.
Fourth. The combination, with the chamber or receptacle provided with the
discharge nozzle, of the plate or cover provided with the steam apertures or passages,
and so formed and secured in place on the said chamber or receptacle, as to be readily
removable therefrom, for the purpose above specified.
Fifth. The construction and arrangement of the chamber or receptacle provided
with the discharge-nozzle, and the regulating valve and rod, the strainer or filter and
the supply pipes, in such a manner that the removal of deposit from the valve or rod,
or from the valve seating, or the cleansing of the strainer or filter, can be effected by
blowing steam through the apparatus, substantially as described.
Sixth. The discharge-rozzle provided with the rod having the taper V-shaped or
other grooves, substantially as, and for the purpose, set forth.
Seventh. The combination, with the discharge nozzle, of the valve provided with
taper V-shaped or other grooves, substantially as, and for the purpose set forth.
Eighth. The chamber or receptacle provided with the discharge-nozzle, the rod
having the taper grooves, the valve also having taper grooves, the steam coil and the
steam apertures or passages above and below the said nozzle, substantially as, and for
the purposes, set forth.
Ninth. The improved apparatus constructedsubstantiallyas describedwith reference
to figures 1 to 4 of the accompanying drawings, for feeding liquid fuel into steam-
boiler and other furnaces.
Tenth. A furnace for use with my improved apparatus, which is provided with a
fire-brick lining, or with arches of refractory material, substantially as, and for the
purposes, set forth.
Eleventh. The combination, with a furnace provided with my improved apparatus
for supplying liquid fuel thereto, of arches of refractory material constructed and
arranged substantially as described, so as to overcome the injuriouseffects of expansion
and contraction.
ited this 29th day of July 1889.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, Agents for the Applicant.