Improvements in the Combustion of Fuel in Steam Boiler and other Furnaces.
Year: 1891

page_text: Date of Application, 30th July, 1891
Complete Specification Left, 30th Apr., 1892-Accepted, 4th June, 1892
PROVISIONAL SPECIFICATION.
Improvements in the Combustion of Fuel in Steam Boiler and other
Furnaces.
I, GEORGE ROSE of 105 Bishop Street, Glasgow, Engineer, do hereby. declare
the nature of this invention to be as follows:-
My improvements in the combustion of fuel in furnaces consists in, first
generating steam within a tubular or other generator which is or may be situated
within the furnace or flue and be heated by the gases arising from combustion, this
steam is conducted to one or more injecting nozzles situated, preferably, below the
furnace grate. The water for feeding the generator is supplied from a suitable
reservoir which has a steam space in it and receives a portion of the steam from the
generator so that a pressure is maintained therein. Water is supplied by gravitation
or from the main or otherwise to the water reservoir.
The injector nozzle delivers the steam in the furnace, preferably, below the grate
so as to force its way through the fuel which may be any cheap material such as
coke riddlings, blaes, slack or dross. The furnace is, saving where the nozzles
enter, entirely closed up.
The apparatus used may consist of a water tank placed in any suitable position.
From the tank a water pipe passes to a coil or other steam generator fitted within
the fire box or flue of the furnace. Part of the steam generated in the coil is
conducted to the tank to maintain a pressure therein so as to force the water to the
coil and keep it supplied whilst the other part is conducted to the delivery or
blowing nozzles fitted below the fire grate. These nozzles may be made with a
cleaning spindle or screw plug and drip cocks.
The apparatus may be used for generating gas for heating steel or other furnaces
on the "Siemens" principle.
My improved appliance requires no steam from a steam boiler and it, therefore,
effects an economy in the steam. It can also be started in a few minutes and
requires very little attention.
nh: 00
CT1001
H. D. FITZPATRICK,
70, Wellington Street, Glasgow.
COMPLETE SPECIFICATION.
Improvements in the Combustion of Fuel in Steam Boiler and other
Furnaces.
I, GEORGE ROSE, of 105 Bishop 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:-
My improvements in the combustion of fuel in furnaces, consists in first
generating steam within a tubular or other generator, which is, or may be, situated
within the furnace or flue and be heated by the gases arising from combustion,
this steam is conducted to one or more injecting nozzles, situated, preferably, below
the furnace grate. The water for feeding the generator is supplied from a suitable
reservoir which has a steam space in it and receives a portion of the steam from the
generator so that a pressure is maintained therein. Water is supplied by gravitation
or from the main or otherwise to the water reservoir.
The injector nozzle delivers the steam in the furnace, preferably, below the grate
017

page_text: "
so as to force its way through the fuel which may be any cheap material such as
coke riddlings, blaes.' slack or dross. The furnace is, saving where the nozzles
enter, preferably entirely closed up.
The apparatus used may consist of a water tank placed in any suitable position.
From the tank a water pipe passes to a coil or other steam generator fitted within
the fire box or flue of the furnace. Part of the steam generated in the coil is
conducted to the tank to maintain a pressure therein so as to force the water to the
coil and keep it supplied whilst the other part is conducted to the delivery or
blowing nozzles fitted below the fire grate. These nozzles may be made with a
cleaning spindle or screw plug and drip cocks.
The apparatus may be used for generating gas for heating steel or other furnaces
on the "Siemens" principle.
My improved appliance requires no steam from a steam boiler and it, therefore,
effects an ecomony in the steam. It can also be started in a few minutes and
requires very little attention.
And in order that my said invention may be properly understood, I have hereunto
appended an explanatory sheet of drawings, whereon
Fig. 1 is a front view of a pair of boilers fitted with the apparatus.
Fig. 2 is a part longitudinal section of the right hand boiler Fig. 1.
Fig. 3 is a part sectional plan showing the furnace broken away.
Figs. 4 and 5 show plan views of steam generators.
Figs. 6 and 7 show modified arrangements.
Figs. 8 and 9 show in section and in plan a form of injector.
Fig. 10 shows a different form of injector in section.
On the drawings the same reference letters wherever repeated indicate similar or
like parts.
Both
In Figs. 1, 2, and 3 the apparatus is shown as fitted to two Galloway boilers.
a is the water tank which is fitted or placed on the brickwork b. c is a water
gauge and d a pressure gauge fitted on the tank. The tank may also be provided
with a safety valve. The tank may be supplied with water from the main or other
suitable source. e is a water pipe from the tank a and which is divided into two
branches e, 2. Instead of having two branches two separate water pipes may be
used. The branches e¹, e² are fitted in the end of the steam generators f, g.
generators are similar in construction. As will be seen at Figs. 2 & 3, the
generators, consist of a long tube which is carried along the upper part of the
furnace and rests on the bridge or other suitable place. i are valves for
controlling the water supply to the generators. The water pipe (or it may be
the steam pipe) may be led down the interior of the generator as shown, at
Fig. 2 & 3, in dotted lines.
As will be seen the ends of the generators may project out of the fronts of the
furnaces. Fitted also to the generators are branch pipes k, 1 which are joined to
the pipe. The pipes j, k, are for steam., are controlling valves fitted
on the pipes. The pipe j leads into the upper part or steam space of the water
tank a.
From the pipes k,l branch off two pipes m, n which are bent round the
fire doors so as to be clear of them. The pipes m, n have injector blowers or
nozzles fitted on their ends. One of the blowers is shown dotted at n² Fig. 2.
The blowers may be enclosed in air delivery casings o. p are doors for cleaning
out ash. q are the usual furnace doors. m³ n' are valves on the pipes m, n.
ashpits are closed by plates pl.
The operation of the apparatus is as follows:-
The
The furnaces are fired with slack or riddlings etc., and a supply of water, by
gravitation, is run into the generators f, g, from the tank a. When the heat in the
furnace is sufficient, it converts the water in the generators, y, into steam, which
passes off by the pipes m, n, (the valves m', n' being open) to the blowers n². The
steam issuing from the blowers, immediately sets up a forced draught in the
furnaces, causing the fuel to burn more rapidly, and to generate a great heat.
A portion of the steam passes into the water tank a, the valves, being open, and
י
'

page_text: creates a pressure therein. When the steam is admitted to the tank a, the pressure
between the tank and the generator is balanced, and, as a consequence, the water
from the tank flows freely and continuously into the tubes f, g, so as to make the
generation of steam continuous, and also keep the blowers in action. The apparatus,
when once started works automatically.
As more steam can be generated in the generators than is required for the
blowers and as the steam pressure in the generators is great, the excess steam may
be drawn from the tank a or pipe j and allowed to escape into the boilers, if they
are working at low pressure, so as to supply (or partly supply) the steam necessary
to take the place of the steam drawn off for the engines. s show, in dotted lines,
pipe connections for supplying the boilers with the excess steam.
If desired when steam is being supplied to the boilers the steam supply to the
blowers may be reduced. When only one boiler is being fitted with the apparatus
the pipe connections (l and e') will of course be led straight to the tank a instead of
being joined to pipes e and j.
Fig. 4 shows in plan a generator made of a tube g bent into a U shape. Instead
of the ends of the tube passing out through the front plate of the furnace the
water inlet pipe e¹ and the steam outlet 7 are led through the front plate into
the tube or the tube may have connections of smaller diameter fitted to its ends.
The smaller pipes are of advantage when there is not sufficient room above the
furnace door for the ends of the tube to project through the front plate.
Fig. 5 shows a generator formed of three tubes g connected together by "tees” g'.
Fitted in the tees are cleaning plugs fl.
Instead of having only one or two tubes for the generator any other suitable
number may be arranged in the furnace. When more tubes are used more steam
is generated.
The tubular generators Figs. 3, 4 and 5 can be easily applied to existing
furnaces.
In Fig. 7 the generator is made in the form of a closed cylinder 9 which is or
may be placed at the back of the fire bridge. is the steam and e¹ the water
connections.
In Fig. 8 a coil generator g is shown. It is or may be fitted in the front of the
furnace as shown.
The injector Figs. 8 and 9 consists of a small delivery nozzle t which is screwed
into a box u which latter is provided with a blow off cock u¹ and drip cock u³.
The box is made one with or connected to a bridge secured to the front of the
furnace. The arrows indicate the course of the induced air current.
w is the
delivery nozzle or casing which may be cast in one with the bridge or secured to
the furnace.
Fig. 10 shows a needle valve as fitted to the injector for the purpose of cleaning
out any scale which may, at any time, choke up the nozzle t.
Any suitable form of injector or blower may be used and any suitable form of
generator may be fitted in the furnace.
When the apparatus is to be used in conjunction with a "Siemens " gas
producer, the blower or blowers are so arranged as to blow into or through the
incandescent fuel.
If desired the generator may be situated in the flue instead of in the furnace.
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. The general arrangement and combination of parts of the apparatus substan-
tially as hereinbefore described and shown at Figs. 1, 2 and 3 of the drawings
annexed, or any mere modification thereof.
In apparatus of the class set forth the combination of a steam generator fitted in
the furnace or flue, pipe connections, a water tank to which steam is admitted

page_text: from the generator and one or more blowers, substantially as and for the purpose
hereinbefore set forth.
Dated this 29th dow of Anxil 1901
H. D. FITZPATRICK,
70, Wellington Street, Glasgow, Agent.