Improvements in Apparatus for Consuming Smoke and Promoting Combustion in Steam Boiler Furnaces.
Year: 1893

page_text: Date of Application, 13th Dec., 1893
Complete Specification Left, 7th Feb., 1894-Accepted, 14th Apr., 1894°
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Consuming Smoke and Promoting
Combustion in Steam Boiler Furnaces.
I, JOHN NUTTER, of 134 Renfield Street, Glasgow, Engineer, do hereby declare
the nature of this invention to be as follows:-
This invention relates to apparatus for consuming smoke and promoting
combustion in steam boiler furnaces.
In carrying out my invention I fit in or on the fire bridge of the furnace a
distribution box which is preferably oblong in shape and is closed by a lid having
overhanging edges or ends. Delivery orifices are made in the front side and back
side of the box.
One or more pipes is or are conducted from the box underneath the fire bars of
the furnace and out to the front of the boiler. Fitted in connection with the pipe
or pipes is a steam nozzle or blower which is or may be supplied with steam from
the boiler. This nozzle is fitted in an injector shaped pipe or coupling which has
one or more lateral air inlet branches on it.
When the apparatus is in operation the steam jet causes an induced current, or
currents, of air to pass down the pipes underneath the furnace, where they are
heated, to the distribution box from which the air and steam issues in two or more
streams. One stream, or series of streams, playing towards the flue and the other
stream, or series of streams, into the fuel of the furnace. By preference the
strongest current, or series of currents, plays towards the flue so as to increase the
draught of the furnace.
The action of the combined air and steam jets promotes combustion and reduces
smoke.
If desired two or more steam blowers may be used.
The induced air currents may pass through or over volatile hydro-carbon oil
contained in a tank or vessel. Or, if desired, the air currents may be drawn
through or forced through a fibrous material saturated with oil.
Dated this 12th day of December 1893.
H. D. FITZPATRICK,
70, Wellington Street, Glasgow,' Agent.
COMPLETE SPECIFICATION.
Improvements in Apparatus for Consuming Smoke and Promoting
Combustion in Steam Boiler Furnaces.
I, JOHN NUTTER, of 134 Renfield Street, Glasgow, 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:
'
This invention relates to apparatus for consuming smoke and promoting
combustion in steam boiler furnaces.
In carrying out my invention I fit in or on the fire bridge of the furnace a
distribution box which is preferably oblong in shape and is closed by a lid having
overhanging edges or ends.. Delivery orifices are made in the front side and back
side of the box...

page_text: One or more pipes is or are conducted from the box underneath the fire bars of
the furnace and out to the front of the boiler. Fitted in connection with the pipe
or pipes is a steam nozzle or blower which is or may be supplied with steam from
the boiler. This nozzle is fitted in an injector shaped pipe or coupling which has
one or more lateral air inlet branches on it:
...
"
When the apparatus is in operation the steam jet causes an induced current, or
currents, of air to pass down the pipe underneath the furnace, where they are
heated, to the distribution box from which the air and steam issues in two or more
streams. One stream, or series of streams playing towards the flue and the other
stream, or series of streams, into the fuel of the furnace. By preference the
strongest current, or series of currents, plays towards the flue so as to increase
the draught of the furnace.
.
The action of the combined air and steam jets promotes combustion and reduces
smoke.
If desired two or more steam blowers may be used.
The induced air currents may pass through or over volatile hydro-carbon oil
contained in a tank or vessel, or, if desired, the air currents may be drawn through
or forced through a fibrous material saturated with oil.
And in order that my said invention may be properly understood I have
hereunto appended two explanatory sheets of drawings, whereon,
Fig. 1 is a longitudinal section of a Cornish boiler with my apparatus fitted
thereto.
Fig. 2 is a longitudinal section of a locomotive boiler with my apparatus fitted
thereto.
Fig. 3 is a back elevation of the distribution box.
Fig. 4 is a plan of the same as it appears when the cover is removed.
Fig. 5 is a frout elevation of the box.
Fig. 6 is a vertical section of the injector.
Fig. 7 is a longitudinal section and Fig. 8 a front elevation of a marine boiler
with my apparatus fitted thereto.
Referring to the drawings whereon the same reference letters wherever repeated
indicate the same or similar parts.
α,
The apparatus consists of a, preferably rectangular, distribution box which is
placed on the fire bridge of the furnace or in any other suitable situation. This
box has secured on it by studs a', a lid or cover the edges of which project over
the sides of the box. As will be seen at Figs. 3, 4, and 5 the box is provided with
two broad shallow openings c, c and three smaller openings d, d, d. Cast. in one
with the box is a flanged branch e to which a pipe(see Fig. 1) is bolted. This
pipe is led along the bottom or side of the ashpit of the furnace and up in front of
the boiler where it is secured to the injector g. This injector consists as shown to
an enlarged scale at Fig. 6, of a hollow casting which is made with a reduced
passage way g' in it. Secured to the top of the casting is a cover ginto which
is screwed a nozzle h. i is a steam pipe leading from the boiler to the nozzle.
jis a tapered air induction pipe which is bolted to the branch of the casting g.
is a valve for turning on and off the steam supply to the nozzle h.
As will be seen at Fig. 4, the openings c and d are slightly bevelled on the
inside.
When the apparatus is in operation steam issues from the nozzle h and induces
a strong current of air to pass down the pipe j. The combined steam and air
current passes along the pipe f to the distribution box a from which it issues in
two streams, one stream passing through the openings, and playing backwards
towards the flue of the boiler, and the other stream passing through the openings d
and playing into and over the incandescent or partly incandescent fuel in the
furnace. As will be seen the larger openings c are at the back of the box so that
a stronger current plays towards the flue than into the furnace.
The air and steam current whilst passing through the pipe fis highly heated.

page_text: In a Cornish boiler as shown at Fig. 1 the distribution box a is preferably
fitted on the fire bridge m.
In a locomotive boiler as at Fig. 2, the distribution box a may be fitted on or
in the fire brick arch n. In this case the pipe i may be led down into the smoke
box of the locomotive and be made to deliver the steam jet into one of the boiler
tubes. The pipe may connect the boiler tube with the distribution box. o is
the air inlet pipe.
In
In a marine boiler there may be two apparatuses one for each furnace.
this case the steam for each injector g may be supplied by the pipes i ¡ from the
valve 9 Figs. 7 & 8. p are drain cocks fitted on the pipes f
If desired the box a may be made larger and longer and two or more pipes / be
used to supply steam and air thereto.
In the case of a boiler with two or more furnaces one large injector may be used
to supply steam and air to each distribution box.
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
consider novel and desire to claim is :-
1. In apparatus of the class set forth, a distribution box a which delivers two
streams, or series of streams, one towards the flue and the other into the furnace,
substantially as hereinbefore described with reference to the drawings anuexed.
2. The combination of the distribution box a, pipe or pipes leading thereto
and one or more injectors g, substantially as hereinbefore described and shown on
the drawings annexed.
Dated this 2nd day of February 1894.
H. D. FITZPATRICK,
70, Wellington Street, Glasgow, Agent.