Improvements in Means and Apparatus for Consuming Smoke and Waste Gases in Furnaces...
Year: 1896

page_text: Date of Application, 30th Dec., 1896-Accepted, 29th May, 1897.
Improvements in Means and Apparatus for Consuming Smoke and
Waste Gases in Furnaces...
I EDWIN SMITH 10 Brougham Street Lozells near Birmingham Machinist 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 improvements in means for effecting the complete
combustion of fuel in steam boilors, muffles, and other heating furnaces, and',
consists in combining and arrangeing the parts of the same, with added auxiliary
adjuncts, in such a manner that the whole of the gases produced during working are
wholly or virtually consumed.
The said improvements in the one part relate to, the ash-pit parts and fluca of
furnaces, and to adjuncts in connection with fire places, in another part in the!
construction of the furnace door, and in a still further part in means for the:
automatic working of a certain part, or certain parts, for the admission of highly
heated air to the furnaces in frout of the burning fuel on the opening and closeing
of the furnace door.
:
Figure 1 of the accompanying drawings represents a front end elevation of a
Lancashire boilor, showing the position of the furnaces or flues in the shell of the
boilor (part of shell only a b a b shown). In one part is shown a front vertical'
elevation of the furnace door, showing openings at or near to the top for the
admission of air to passages within the interior of the said door, also the dead plate,
and an air receiveing chamber, or box, attached or combined to the underside of the
said dead plute, with openings at each end for the admission of air, and in another
part shows a back view of a baffle or flap, at the rear end of the flue or furnace,
with a portion of the arrangements for opening and closeing the baffle door
or flap.
Figure 2 represents in longitudinal vertical section a steam boilor furnace or
flue (detached from the shell of the boilor) with its various parts constructed
arranged and provided with improvements according to my invention.
Figure 3 represents a longitudinal section of the air chamber or box and dead
plate combined, showing openings at the bottom for the admission of air from the
atmosphere, also the passage or passages leading to a opening or openings in the
dead plate,
which opening or openings are for the purpose of admitting the hot air,
from the air chamber or box, into the furnace, in front of the burning fuel.
Figure 4 represents a cross section of the same at each end where the air enters
the openings 7h7.
Figure 5 shows another cress section of the same at 1, where the air after being
heated passes through the opening 6 1, in the dead plate, into the furnace in front of
the burning fuel.
Figure 6 shows another form of fire door. hh is an elevation of the
mm are openings for the admission of air.
same,
and
Figure 7 represents a cross section of the same on the dotted lines B B.
Figure 8 represents a front elevation of a muffle or other furnace, showing my
improved fire door, placed as a fixture on each side of the ordinary furnace door
of the said mufle or furnace, or my improved fire door may be used instead of the
1

page_text: ordinary furnace door.. The same figure also shows the dead plate and air box
combined.
The same letters of referance indicate corresponding parts in the several figures
of the drawings.
Placed and running longitudinally and horizontally within the interior of the
flue, or furnaee, or chamber a a; Figure 2, are furnace fittings consisting of fire
burs a 1. a 2 resting upon bearer a 3 fire bridge a 4 and dead plate b.
Combined or attached to the underside of the dead plateb which as openings b 1.
through it at any part closed by flaps or lids c is an air receiving chamber or box 62.
with openings 7. 7. Figure 3 at each end for the admission of air for the purpose
of being highly hoated before passing through the opening 61. in the dead
plate to the furnace in front of the burning fuel the said air chamber or box may
be fitted with baffle plates for the purpose of giving the air a circuitous course
thereby heating it the more effectually.
The bottom of the air chamber or box may be provided with openings covered
with lids so that dust or any other matter can be removed when required.
Located within the flue or chamber at the rear end of the fire bars and at a
convenient distance. from the back of the bridge. a 4. is a baffle e e e.
made to fill up the whole of the space in the flue or a portion of the space may be
It may be
built up with fire bricks arranged and constructed for. the purpose of preventing
the accumulation of smoke and gases in the flues and chimney stack. Also to prevent
cold air passing through the furnace or flues and thereby lowering the temperature
during the process of fireiug. It is also for. the purpose of regulateing the air that
pasees through the fire door and dead plate and is provided with. a opening or
openings e 1. also a door or flap e 2: operated upon by the link and horizontal
bar g.1. the said bar passing through the ash .pit k into the air chamber or box 62.
combined with the dead plate and is then connected to the door or flap c by means.
of the link and then continues through the air chamber on to a bracket 5. The
horizontal, bar as a snug 3. & catch 6. connected by.a.pin h.2, operated upon by
the dependant plate 4. jointed. to. the fire, door d. so that as the fire door is
opened the horizontal bar: is moved outwarde,, aud closes the door c, also the
door e 2, and, when the fire door is closed again the said bar is moved. backwards,
and the door.c. aud,door e 2. are opened.
Attached to the front of the furnace or, flue a.a,, Figure 2, is a. vertical cross
directed section of my improved fire door d. Air enters the openings.a.d. ad. into
the passages, or chambers, d 1. d 2. where it becomes highly heated. It is then
admitted into the furnace through openings d 3. d 4. in front of the burning fuel.
1 may add that the hot air comeing through the fire door outlets d 3. d4. comes in
contract with the hot air passing through the opening 1, in the dead plate, causes
the said air, to spread over the burning fuel, and thus comeing in contract with the
gases ariscing therefrom, causes the said gases to be effectually consumed, and
thereby a saveing of fuel is effected.
The manner in which my invention is carried out is shown principly in Figure 2.
in the ash-pit part of the furnace. Air enters the openings h 7. h7, Figure 3, into
the air box, and in its passage to the centre of the dead plate b. becomes highly
heated. It then passes through the opening b 1. in the dead plate into the furnace,
in front of the burning fuel. The said opening is closed by the door or flap c.
dureing the process of fireing or cleaning out the furnace, thus preventing ashes or
dust falling into the air box.
The flap or door,c. is worked by the har g 1, to which it is connected by the
link . also the door e 2. in the baffle is connected to the same g.1. by means of the
link g. On the bottom of the fire door is fixed a dependant plate 4. which reaches
down between the stud h 3, and the catch 4 6. the said catch being connected by a
joint and pin 2. On the opening of the fire door, the depending, plate presses
against the loose catch, h6. which slides along the bearer. 45. and draws the 5
horizontal bar g 1. forward and closes the door c, also the door e 2. at the same time.
As soon as the doors are properly closed, the catch 6. falls over the end of the.

page_text: bracket or bearer, and thus letting the firedoor pass on free. The door e 2. may
be only partially closed, when the fire door is closed again. The same plate h4.
presses against the stud h 3. and pushes the bar g 1. backwards, and thus opens the
doors c. and e2. to the required distance. The air then rushes through the
openings in the fire door d 4 d 3, also through the opening 1. in the dead plate,.
in a highly heated state, and spreads itself over the burning fuel, and thus causeing
the whole of the gases ariseing therefrom to be wholly consumed, hence an economy
in fuel.
In the hollow fire door Figure 6. and 7. is a hack containing various passages.
for the purpose of highly heating air. m are the air inlets. The air passes
through the openings m m Figure 6. and continues through the various.
passages m 1. m 2, Figure 7, where it becomes highly heated, and is then admitted
into the furnace through the bottom openings m 3. m 4. in front of the burning-
fuel. In muffle and other similar heating furnaces, as shown in front elevation in
Figure 8, 1 may dispose of, or dispense with, a. part of the apparatus, and use the
doors only as fixtures on each side of the ordinary furnace door, as shown in..
Figure 8, or the whole of the apparatus may be used as in Figure 2.
may add that the heated air that passes through the fire door, comeiug in.
contract with the air that passes through the openings in the dead plate at right.
angles, causes the air to spread itself over the burning fuel, hence complete.
combustion.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manuer the same is to be performed, I declare that what I
claim is.
First. In a steam boilor, or other heating furnaces, or ash-pit part of furnaces,.
fitting or providing the same with air chamber, or chambers, or boxes with openings
to the atmosphere, and with a passage, or passages, for supplying highly beated
air, and in connection or combination with the dead plate, as and for the purpose as.
described and set forth.
Secondly. In a steam boilor, or other heating furnaces, having air heating
chambers or boxes, the combination with the air beating chamber 62. of a jointed
flap or door substantially as described and set forth.
Thirdly. In a steam boiler, and other heating furnaces, the working the flap or
door c. by the fire door, by means of the plate 4, the slide or bar h2, h3. h6. g 1..
and link h. fitted and constructed and working substantially as described and set.
forth.
Fourthly. In the firedoors of furnaces, forming or makeing the same, with
passages or chambers, or boxed construction, and having inlet and outlet passages,.
Bubstantially as described and set forth.
Fifthly. In a steam boiler, or other furnace, flue, or chamber, the construction,.
makeing and provideing a baffle e e e. with opening el. provided with a door or
flap.e 2. and worked by means of the link g. and horizontal bar g 1. the depending
plate 4, the slide h2. h3. h6. fitted, constructed, and working substantially as.
and for the purpose as described and set forth.
Sixthly. The improvements in steam boilor, and other furnaces, and the general.
construction, arrangement, and combination of the parts, substantially as described.
and set forth.
Seventhly. In firedoors of boilor and other furnaces, makeing and constructing
and provided with inlet openings.m. m, also vertical and horizontal passages m 1. m 2..
leading to outlets m 3. m 4, substantially as described and set forth.
Dated 20th doir of December 1896
EDWIN SMITH,.
Applicant.