Tumprovements in or relating to 'Gas-fired Steam Boilers..
Year: 1894

page_text: Date of Application, 1st Oct., 1894
'Complete Specification Left, 30th July, 1895-Accepted, 31st Aug., 1895
Tumprovements in or relating to 'Gas-fired Steam Boilers..
We, GEORGE HENRY TAYLOR of 14 Selwyn Avenue, Kew Road; Richmond,
in the County of Surrey, Engineer, and CHARLES BULLEN WALLER of Clarence
Lodge, Clapham Park, in the County, of Surrey; Gentleman, do hereby declare the
nature of this invention to be as follows:-
This invention relates to steam' bõilers, particularly of the Lancashire and
Cornish type, having one or more flues, and in carrying out the invention we form
a gas producer furnacel with or without forced' draught, forming this in brick-work
or equivalent in front of the boiler. From the gas producer the gases pass to a
fixing chamber also in the brickwork or masonry in which 'the products from the
gas producer are converted into fixed gases and in this we prefer to provide a
number of projecting walls or other projections which may be made of fire-brick
or clay and become highly heated and assist in the fixing process. 'Conveniently
these, may be arranged as vertical walls in the fixing chamber so that the products
from the gas producer may be split up and divided into a number of small currents.
From the fixing chamber the gases pass to a mixing chamber where the various
currents are re-united and mixed and again split up in passing through a bridge
or wall in which are suitable pipes or tubes to conduct the heated gases in jets or
streams into the combustion chamber where they mix with a supply of heated air.
The bridge or wall we prefer to place in the end of the boiler flue or if there
be two, to divide it up, one half in each flue, 'the mixing chamber communicating
with both and the mixing chamber and fixing chamber being both preferably
outside and in front of the boiler. The bridge or wall' is hollow and its interior
space is supplied with air which having passed through passages into brick-work
adjacent to the furnace and the fixing and mixing chambers has become highly
heated and becomes still more so in its passage through this hollow wall, short
pipes or openings being provided in the thickness of the wall to allow of the
passage of the air from the interior of the wall into the combustion chamber where
us before explained it mixes with the jets of gas from the mixing chamber. The
boiler. flue immediately in front of the orifices by which 'the gas and air enter may
be lined.completely or partially with fire-clay or the like to protect the plates from
the excessive heat developed there.
The gas producer may be supplied with fuel' by a suitable hopper .from above
and we may employ one or more furnace grates or the furnaces may be quite
separate if desired. For a forced draught we prefer to employ a suitable injector
discharging underneath the fire-bars; where two furnaces are employed two
injectors may be used.
1
:
Dated this 1st day of October 1894
W. P. THOMPSON & BOULT,
Agents for the Applicants.

page_text: COMPLETE SPECIFICATION.
"
,:
Improvements in or relating to Gas-fired Steam Boilers.
We, GEORGE HENRY TAYLOR of 14 Selwyn Avenue, Kew Road, Richmond,
in the County of Surrey, Engineer, and CHARLES BULLEN WALLER of Clarence
Lodge, Clapham Park, in the County of Surrey, Gentleman, 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 steam boilers, particularly to boilers of the Cornish
and Lancashire type, having one or more flues, and in carrying out the invention
we construct a gas producer furnace with or without forced draught appliances,
forming it in brick-work or equivalent in front of the boiler, and arrange and work
it in the manner hereinafter particularly described with reference to the accom-
panying drawings, wherein
V
Figure 1 is a sectional plan of one end of a Lancashire boiler provided with a
gas-producer furnace according to our invention.
Figure 2 is a vertical longitudinal section of the boiler and furnace on the
line 2, 2, of Figure 1.
Figure 3 is a transverse section of the furnace, half on the line 3, 3, and half
on the line 44 of Figure 2.
Figure 4 is a horizontal section showing an application of our invention to a
Cornish boiler..
Figure 5 is a view, the right-hand half in elevation and the left-hand half in
vertical section showing the application of our invention to a water-tube boiler of
the Belleville type; this figure represents an arrangement of two boilers placed
end to end as used on board ship,, but our improvements are applied only to the
left-hand boiler.
Figure 6 is a horizontal section of part of Figure 5.
↑
Like letters indicate like parts throughout the drawings,
With reference first to Figures 1, 2 and 3, A is the steam generator of which A'
are the two flue tubes.. The furnace structure B.is erected at the front of the boiler A
and extends partly into the flue tubes A as shown. This structure comprises the
following main parts, viz. :—
(1) Two gas-producing chambers B' at the lower part of each of which is
provided a grate B beneath which is an ash-pit Ba..
(2) A gas fixing chamber C cominon to both of the chainbers B₁ and connected
with them by ports or openings D formed in the upper part of the wall B* which
separates the producing from the fixing chambers.
(3) A mixing chamber E connected to the gas-fixing chamber C by ports or
openings F formed in the lower part of a wall C which divides the fixing chamber
from the mixing chamber.
(4) Two walls GG forming in each flue a hollow bridge through which pass
pipes G² for conducting the gas from the mixing chamber E into the combustion
chambers H, and
(5) Three passages 1, 1, 11 two of which. (1) extend through the outer walls of
the furnace structure B and place in communication with the atmosphere chambers G
between the walls G G, the third passage (I') extending through the wall B
(separating the two chambers B) and connecting with the external atmosphere a
trunk situated in the lower part of the mixing chamber E. At one side of the
truuk J there are provided outlets J' connecting said trunk with the hot-air
chambers G, G are openings or short pipes traversing the wall G¹ and serving
to connect the interior of the hollow bridges with that of the combustion
chambers H.

page_text: In the fixing chamber we provide, baffle walls or projections C adapted to.
bronk up the gases which enter it from, the producers. The gases when thus broken.
up absorb some of the great heat which the walls themselves have received and
thus are converted into fixed gases.
The fronts of the ash-pit B may be closed in. and the air to support com-
bustion on the grates B may be supplied thereto 'through one or more Korting's
blowers K, or through fans or other devices.
B and B are respectively stoking and inspection orifices,, which, during the
operation of the apparatus are closed: "Lis a fuel supply hopper, one of which
is placed over an opening above each grate; when it is desired to introduce fuel
into either producer, this may be effected by means of its hopper which, besides
having a cover L at its upper part is also preferably fitted with a valve at its.
lower part like the valve L in Figure . This construction admits of the hopper
being charged with fuel when the cover L is opened and the valve closed so that.
after the cover L' is closed the valve may in turn be opened and allow the contents
of the hopper to fall on to the grate the whole taking place without any of the
gases escaping through the hopper.
The operation of the before described apparatus is as follows:
The gases generated in the gas-producing chambers B' pass through the ports D
into the fixing chamber C wherein as before described they are broken up and
fixed by contact with the baffle and other walls of the chamber which, assuming
previous working, have become vory highly heated. From the chamber C; the
gases pass through the ports F into the mixing chamber E whence they pass.
through the pipes G into the combustion chambers H.
:
The air to support combustion of the gases in the combustion chambers H
passes thereto through the channels I becoming very highly heated on its way
by contact with the hot walls of the apparatus and it is still further heated in the
chamber G³ by reason of its close proximity therein to the mixing and combustion
chambers; it passes by way of the openings G₁ into the latter where it mixes with
the gas which arrives as aforesaid by way of the pipes G and is then and there
consumed in the form of an intensely hot flame.
In applying our present invention to a Cornish boiler we may either use one
gas producing chamber B which arrangement would be substantially represented
by one half of the furnace structure shown in Figure 1 or we may as shown in
Figure 4 employ two gas-producing chambers both adapted to deliver the gas into
the single flue of the boiler.
As applied to a water-tube boiler our invention except as regards the precise
manner of applying it to the boiler may be substantially similar to that before
described the only naterial differences as shown in Figures 5 and 6 for example
being that here the chambers E and G³ and consequently the walls G G¹ and
tubes G and G are dispensed with.
In the operation of this construction of the apparatus the gas passes out from
the chambers B' through the ports D into the chambers C wherein they become
"fixed" as before described, they leave this chamber C to directly enter the
combustion chamber H by way of the ports F. The air for supporting com-
bination in the combustion chamber H passes through the passages I I' directly
into said chamber where, as in the before-described example the gas is consumed
in an intensely hot flame which in this instance passes upwards among the water
tubes A³ at one side of the bridge M and baffle plate M' and then downwards
between the water tubes at the other side of the baffle plate M' the products of
combustion finally escaping to the uptake by way of the outlet N which latter is
represented in dotted lines in Figure 5.
Instead of the arrangements represented in Figures 1, 2, 3, 5 and 6 we may
employ a furnace structure with only one chamber for delivering the gas
produced therein into both flues of the Lancashire boiler or for heating the water-
tube boiler though we prefer the arrangement illustrated in the drawings for these
two applications.

page_text: 1
Being the proprietors of Letters Patent No. 7510 of 1893 granted to George
Henry Taylor we are aware of the contents thereof and do not claim what is
patented thereiu.
Having now: particularly described and ascertained.the nature of the said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is;-
1. The combination with a boiler having two or more interior flues and a gas-
producing furnace outside the same of an extension into each flue comprising
! walls G Ġ¹ a chamber G³ tubes' Gand passages 'G substantially as and for the
purpose described and illustrated in the accompanying drawings.
1
2. The combination with a boiler of the Cornish or single-flue type of a'furnace
structure outside the boiler and having two gas-producing chambers,such as B¹
both delivering gas into 'the' boiler flue substantially, as and for 'the purpose
described and illustrated in the accompanying drawings.
3. The combination with a boiler having two or more flues of a gas-producing
furnace having a central air-passage I and trunk J substantially as and for the
purpose described and illustrated in the accompanying drawings.
4. The combination with a water-tube boiler of a furnace structure comprising
one or more gas-producing fixing and combustion chambers such as B C and H
and air-passages such as II' all substantially as and for the purpose described
and illustrated in the accompanying drawings.
5. The combination with a steam boiler of a gas-producing furnace constructed
and operating substantially as and for the purpose described and illustrated in
Figures 1, 2 and 3 or Figure 4 or Figures 5 and 6 of the accompanying drawings.
Dated' this 29th day of July 1895.
CHARLES B. 'WALLER.
Alfred J.'Boult,
Agent for the Applicants."
CHARLES B. 'WALLER.
..
'Alfred J.'Boult,
Agent for the Applicants.'