Improvements in or relating to Gas Fired Boilers.
Year: 1893

page_text: Date of Application. 12th Apr., 1893
Complete Specification Left, 12th Jan., 1894-Accepted, 7th Apr., 1894
PROVISIONAL SPECIFICATION.
Improvements in or relating to Gas Fired Boilers.
I, GEORGE HENRY TAYLOR, of Cadby Hall Works, West Kensington, in the
County of London, Engineer, do hereby declare the nature of this invention to be
as follows:-
This invention relates to steam boilers of any suitable construction the novel
features relating to the arrangement and construction of the furnace separate from
the boiler and the introduction of the air.
In carrying out the invention I employ any suitable kind of boiler say
conveniently a water tube boiler connected with a steam chamber set at the upper
may be
portion of the brick setting; the details of the boiler are unimportant and
varied to suit circumstances.
The furnace is constructed in the brickwork and I prefer to make it in the form
of a chamber with fire-bars at the bottom so that the fuel may he stacked in the
chamber which thus becomes a gas-producer furnace. The gases are carried over
the back wall of the chamber through a suitable passage conveniently formed by a
bridge dipping into a chamber to near the bottom so that the gases are forced to
take a tortuous course thus affording time for them to become a fixed or permanent
gas. The back wall of this second chamber which forms the termination of the
passage may be perforated or provided with horizontal slits through which the gas
passes to the combustion chamber and I prefer to make this last wall hollow and to
introduce into it heated air in a direction across that of the gases, thus, if the gases
pass through the wall horizontally, the air may conveniently pass through the wall
vertically so as to ensure thorough intermixing of the air and gas after which they
may proceed in streamlets in any desired direction say for instance horizontally into
the combustion chamber.
The air may be introduced by horizontal passages past the furnace and allowed
to enter the back wall thereof, which for the purpose may be made hollow and
divided by a vertical partition so that the air would rise up this wall on one side
and pass
down it on the other; it would then pass by the second chamber and enter
the hollow back wall thereof, as already explained.
One or more jets of hydrocarbon oils or the like may be employed if desired
preferably at the bottom of the combustion chamber to ensure the prompt ignition
and full combustion of the gases therein.
The fuel in the furnace may be solid or liquid as desired, and in the former case
may be supplied through a convenient hopper which should be closed with a
gas-tight valve arranged in the upper portion of the front wall of the furnace.
Steam and air or air under pressure may be supplied to the ash-pit or space
underneath the fire-bars so as to rise into the furnace from the bottom and I find
that one of Korting's well-known blowers answers well for this purpose.
The furnace is preferably placed so far under the boiler that the front of the
furnace is approximately level with the front of the boiler.
I wish it understood that the gas producer and furnace arrangement above
described are not confined to any special form of boilers but may be used with
various kinds of boilers and wherever practicable, as for example in a marine
builer.
Dated this 12th dor of April 1893
W. P. THOMPSON & BOULT,
Of London, Nottingham, Liverpool, and Manchester,
Agents for the Applicant.

page_text: .
Improvements in or relating to Gas Fired Boilers.
I, GEORGE HENRY TAYLOR of Cadby Hall Works, West Kensington, in the
County of London, 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:-
The invention relates to gas producer furnaces for steam boilers and will be best
understood by reference to the accompanying drawings, in which :-
Figure 1 is a longitudinal vertical section showing a tubular boiler fitted with a
furnace constructed according to my invention.
Figure 2 is a horizontal section of the same on the crooked line 2-2 of
Figure 1.
Figures 3 and 4 are respectively longitudinal vertical and longitudinal horizontal
sections of a gas-fired double-flue boiler constructed according to this invention,
Figure 3 being a section on the line 3-3 of Figure which latter is a section, on
the line 4-4 of Figure 3.
Figure 5 is a section showing my invention applied to a marine boiler.
Like letters indicate like parts throughout the drawings.
of
The boiler to which I have shown my invention applied in Figures 1 and 2 is of
the well-known tubular type and may comprise a battery of inclined water tubes A
all connected at the front end with a chamber A' and at the opposite or back end
with a chamber A³, a steam chamber A³ connected at the front end by means of
one or more short tubes A* with the chamber A' and at the back end by means
one or more tubes A³, chamber A and one or more approximately vertical tubes A
with the chamber A². When only one tube A' is employed the chamber A® is
dispensed with and said tube is connected directly with A. The boiler as shown
in the drawings may also comprise a mud or sediment chamber A connected with
chamber A² by one or more tubes A' and provided with the necessary blow-off pipe
and man- and mud-holes, and the usual steam and water gauges and other fittings
may also be applied; none of these details however individually constitute any
indispensable part of my present invention.
The steam chamber A³ is supported at the top of the brick setting B which at its
interior is divided by walls B₁ B into substantially two chambers B³ B the former
⚫ of which constitutes the combustion chamber and the latter the smoke chamber
which is connected through the opening B with any suitable stack or outlet.
The pipes A extend into both chambers B³ and B', and baffle plates C are so
arranged in connection with them as to cause the products of combustion to suitably
pass and repass amongst or between them before finally escaping through the
opening B as indicated by the arrows in Figure 1.
D is the furnace which is constructed in the front part of the settling B preferably
in the form of a chamber with fire bars D' at the bottom so that the fuel may be
stacked in this chamber which thus becomes a gas-producer furnace. The gases
produced in D on their way to the combustion chamber B³ pass through the
chamber E down into which dips the baffle E' depending from the crown or upper
part E2 of wall E2 E³ which divides the chambers D and E from the combustion
chamber B. The baffle E' though considered advantageous is not an indispensable
feature and the chamber E may be constructed without it, in which case the
walls E3 E' if desired may be somewhat closer together than in the example shown.
The back and front walls E3 E' of chamber E (the former of which constitutes the
bridge of the furnace D) are formed hollow, having spaces or chambers ee
respectively within them. The chamber e is divided by vertical walls E

page_text: Figure 2 into preferably three passages the middle of which is connected with e³ by
the passage E which, as shown in dotted lines in Figure 2 is of gradually increasing
width towards the back. The outer of the three passages of chamber et are each
connected by a passage E' (shown only in dotted lines) with the front of the
apparatus so that air may pass from the outside into the chamber et and thence by
way of the passage E into e in both of which chambers and in the passage Es it
becomes highly heated by contact with the highly heated walls. Fare tubes
extending completely through the hollow wall E3 and across the chamber e³ therein
and placing the chamber E in direct communication with the combustion chamber B³,
and Gare shorter tubes extending through only the back wall of chamber e³ and
placing said chamber in direct communication with B³ so as to admit of the heated
air from within e³ passing into B³. H are passages leading from the front of the
apparatus and connecting by branches H with the combustion chamber B³ so that
said chamber may receive a supplemental supply of fresh air from the outside.
The passages E7 and H may be provided with suitable valves or dampers for
controlling the flow of air through them. Instead of conveying the products of
combustion directly from chamber into the combustion chamber B³ by pipes F,
I may use shorter tubes or merely openings through the front of wall E³ so as to
introduce these products first into the chamber wherein they may become
intimately mixed with the heated air before passing through the tubes or openings G
into the combustion chamber B³.
The front D2 of the furnace D may conveniently be of cast iron lined with fire
clay or other suitable refractory material and provided with a door D³ through
which to remove the ashes from beneath the fire-bars D', a second door D' at
about the level of the fire-bars for clinkering, a third door or slide D³ for the
introduction of a stirrer for agitating the charge within D and a hopper D whose
mouth or upper end is closed by a slide or door D' and lower end which
communicates directly with D, by a slide or valve D adapted to be opened and
closed from the outside by means of a hand-lever Dº pivotted at D¹ to the front
of the hopper Dº.
I is a blower, or a fan may be used instead, connected with the space beneath
the fire-bars for forcing air and steam (or air alone may be admitted) into the
furnace to support combustion therein, all the doors and slides in the front D² being
tightly closed against the admission of air.
In the example shown in Figures 1 and 2 the front D2 of the furnace D projects
beyond the upper part of the setting B but it will be understood that it may be
substantially flush with it if the hopper be arranged to project more to front of D²,
it will also be understood that the furnace may be constructed for consuming liquid
instead of or in addition to solid fuel, an example of such an arrangement is
hereinafter described and shown in Figure 3.
The operation of the before described apparatus is as follows:-
A fire is kindled on the fire bars D' and when sufficiently advanced fuel is charged
on to it through the hopper D up to a suitable height, air being supplied by the
blower or fan I. The two doors or slides D7 D8 of the hopper D enable the fuel
to be supplied to the furnace without gas escaping from it, the fuel being first
charged into the hopper while the door D³ is closed and the door D' open and then
from the hopper D after closing the door D by opening the door D³. The gases
generated in the chamber D pass in the direction indicated by the arrows over the
bridge E into the chamber É first downwards at one side of the baffle E' and then
upwards at the other side, sufficient time being thus afforded for the gases to
become a fixed or permanent gas. This gas next passes through the tubes or
openings F into the combustion chamber B3 wherein it meets and mixes with the
highly heated air entering said chamber by way of the tubes or openings Gas
hereinbefore described and along with which it is there consumed. The flame or
products of combustion then pass and repass amongst the water tubes A also
meanwhile impinging against the underside of the steam chamber A³ as indicated
by the arrows in Figure 1, finally leaving through the opening B³.

page_text: In the arrangement shown in Figures 3 and 4 the furnace is contained wholly
within the boiler which, for this purpose, is provided at the front end of the flues.
with a sufficiently large shell or chamber J. This chamber may connect with one,
two or other desired number of flues J two being the number in the example
represented in the drawings, or if desired instead of large flue tubes, such as J'
being used a number of small tubes may be employed as in multi-tubular boilers,
or in the case of marine boilers the gas-producer furnace would occupy the position
of the ordinary furnace the return tubes being employed as usual, this is illustrated
in Figure 5.
J2 are conical circulating tubes fitted in the flues J and K is a nozzle and
Ka valve therefor for delivering a jet of liquid fuel into the furnace D, this liquid
fuel being either used instead of or in addition to the solid fuel. It is advantageous
for facilitating clinkering to divide the furnace into two parts by a partition wall L
as shown in Figure 4 which however terminates at the part represented by the
line L so that while there are practically two furnaces and sets of fittings therefor
there is only one ash pit and only single chambers B³ E e³ e and a single passage E
which are common to both of said furnaces. In other respects the apparatus shown
in Figures 3 and 4 is substantially similar to that shown in Figs. 1 and 2 and
therefore no further description is considered necessary.
One or more jets of hydrocarbon oil or the like may be employed if desired
preferably at the bottom of the combustion chamber to ensure the prompt ignition
and full combustion of the gases therein.
I wish it understood that the gas producer and furnace arrangement before
described are not confined to any special form of boilers but may be used with
various kinds of boilers and wherever practicable.
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 combination with a steam boiler and a gas-producing furnace comprising
a closed-fire chamber and combustion chamber B3 substantially separated therefrom
of a chamber E with baffle E' dipping down into it and tubes or passages
connecting the chambers E and B3 and air chambers and passages such as eet
E E7 H H substantially as described and illustrated in the accompanying
drawings.
2. The combination with a steam boiler and a gas-producing furnace comprising
a closed-fire chamber and combustion chamber B³ substantially separated therefrom
of a chamber E and tubes or passages connecting the chambers E and B³ and air
chambers and passages such as e³ e E E' H H substantially as described.
3. The combination and arrangement of parts constituting the complete gas-
producing furnace substantially as described and illustrated in Figures 1 and 2 of
the accompanying drawings.
4. The combination and arrangement of parts constituting the complete gas
producing furnace and boiler substantially as described and illustrated in Figures 3
and 4 of the accompanying drawings.
5. The combination and arrangement of parts constituting the complete gas
producing furnace and boiler substantially as described and illustrated in Figure 5
of the accompanying drawings.
6. In a gas producer furnace a device for mixing the gas and air consisting in a
hollow wall such as E³ tubes such as F passing through both sides and short tubes
such as G passing through one side only of the wall, and connecting the hollow
interior thereof with the combustion chamber substantially as described and
illustrated in the accompanying drawings.
7. In a gas producer furnace the combination with a hollow wall such as E³ ³ F
and G of a hollow bridge such as E e E' substantially as described and illustrated
in the accompanying drawings.
8. In a gas producer furnace the combination with a hollow wall such as E³ ³ F

page_text: and G and hollow bridge such as E' e* E' of a chamber E and baffle E' substantially
as described and illustrated in the accompanying drawings.
Dated this 12th day of January 1894.
GEO. H. TAYLOR.
W. P. Thompson & Boult,
Agents for the Applicant.