Improvements in and relating to Boiler and other Furnaces.
Year: 1895

page_text: Date of Application, 19th Aug., 1895-Accepted, 11th July, 1896
COMPLETE SPECIFICATION.
Improvements in and relating to Boiler and other Furnaces.
I, EWALD PEISELER, Manufacturer of Haddenbach near Remscheid in the
Province of Rbineland and Kingdom of Prussia 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 :-
It is of the utmost importance in rational firing, that it should answer all
requirements respecting the smallest consumption of fuel.
The methods of boiler and other larger firings hitherto generally in use do not
however meet all these requirements because the even spreading of the fuel over
the whole surface of the grates and the removing of clinkers, which by means of
the firing-rod must be worked towards the front, that is to say towards the
newly added fuel, on the one hand demands great practice on the part of the stoker,
but on the other necessitates the fire doors of the boiler to remain open some
considerable time etc. This brings a great quantity of cold air to the fire, thus
causing a great cooling in the firing-rooms and considerably impeding the
combustion.
v
To these disadvantages it is to be added as principal point the spreading of the
new fuel over the whole surface of the grates allowing but a very slight combustion
of smoke and letting many good gases (combustible) escape unconsumed.
These drawbacks are to be removed by the invention described below and
explained by the drawing.
The object is to keep the fire-doors open but a very short time only, while the
fuel is being put on, whereas the spreading of the coals etc. on the surface of the
grates and the removing of the clinkers are effected while the doors are closed.
The annexed drawing shows the arrangement on a steam-boiler.
Figure I is a longitudinal-section of the fire tube provided with the new
contrivance, Fig. II a horizontal section of the latter, above the grate,
Fig. III a cross-section of the fire tube A in the line xx of Fig. I as seen from
the front to the back,
Fig. IIII is a cross-section of the boiler in the line y y of Fig. I,
Fig. V represents a front-view of the boiler with the invention and in
Figs. VI to VIII are shown fire-bars which are to be used.
Fig. IX represents a handle and Fig. X a lever used for the axle g being rotated.
The arrangement is as follows:
At both sides of the fire-box A (fire tube etc.) T shaped supports a are fixed equally
high, projecting in front beyond the frame of the furnace. On these supports are
resting the fire-bars b, the last of which being on the further ends of the T-shaped
supports. Immediately to these ends at the back inside the flame-pipe is joined a
cast-iron-piece B, which can be shifted from where the stoker stands by means of
the two rods e e or otherwise on rails c c under the fire bridge C. Between the
supports a and the rails c a space d is left. On each part of the supports outside
the boiler is arranged a support D, in each of which a rack F by means of pinions
(cog-wheels) f, which are on one common axle g can be moved backwards and
forwards. This revolving of the axle g is effected by means of levers, one of which
is shown in Fig. X.
The moving of the plate B is also worked as already mentioned by rods e, which
bave at the frout end a slit e, for putting in the handles, Fig. IX.

page_text: The above described arrangement is worked as follows:
First, the plate B is pushed back under the fire-bridge C, this causes the clinkers
to fall from the plate through the opening d, made by the moving of the plate B
into the ash-pit K. Now, by turning the cog-wheels f the racks F are pushed
forward. These knock against the front. fire-bar and by further. turning the cog-
wheels press all the fire-bars to the back. Thus, the last of the fire-bars fall off the
supports a together with the remaining clinkers through the opening d into the
ash-pit, at the same time the fuel on the other fire-bars is pushed with these to
the back. Then, by pulling the plate B against the edge of the supports, the firing
behind is once more closed.
Of course the fire-bars, which have fallen into the ash-pit must be replaced in
order to keep a closed surface of grates in front.
This is done by putting each time a fire-bar (of which the stoker must always
have a quantity in reserve) on the front of the part of the supports projecting
from the boiler and then by pressing the former in the manner already described
by means of the racks against the fire-bars at the back. This is repeated as many
times as fire-bars have fallen through.
The grate being thus again completed, new fuel may be, put on the front fire-bars,
the burning coals having previously been brought to the front.
Of course, the above described sliding arrangement consisting of racks F and
pinions can be substituted by any other suitable contrivance.
As it is not impossible in the practical working of boiler-firings with fire-tubes,
that the fire-bars may not fall through smoothly but perhaps by falling crossways
get stuck fast, jointed fire-bars are proposed two of which are shown in Figs V.I.I
and VIII. The fire-bar in Fig. VII has a joint r, by means of which the former
can be folded in the plane of its height, whereas the fire-bar in Fig. VIII can 'be
folded round the hinges in the plane of its width.
As will be seen, this contrivance facilitates considerably the falling through of
the fire-bars.
The new contrivance in the first place has the advantage, that the new conl
is thrown only on the front, on account of which, the developing gases (smoke)
must pass over the whole. length of the fire already well alight and thereby effect
a complete combustion of the smoke, in the second place we have the advantage,
that only very little cold air can enter the burning space from above and lastly, that
the clinkers and fuel a
are moving in the same direction.
The invention may be applied not only to new, but also to any old boilers, in
which case the supports a are connected with a skeleton-bart (Fig. I) so that
the whole arrangement may be pushed into the fire tube etc. and fastened therein.
By the bolting of a covering plate a smooth place is then made for the falling
ashes.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, 1 declare that what I
claim is:
1.) A firing-contrivance, by which the fire-bars (situated with their length at
right angles to the length of the boiler) arranged on supports, are moved from the
front to the back in the direction of the length of the boiler by means of a suitable
sliding-arrangement, whereby the back fire-bars fall through an opening-into-the
ash-pit and are replaced by introducing new bars from the front part of the grate
in order to effect a spreading of the fuel and the removing of the clinkers without
opening the fire doors.
2.) To the firing-contrivance mentioned under 1) the arrangement of a moving-
plate B below the fire-bridge in such a manner, thut as a rule it closes the back
part of the grate surface up to the fire-bridge, but on being pushed back, leaves
the opening d for the falling through of the fire-bars and clinkers, whereby at: the
same time the clinkers accumulated on the plate are swept off by the fire-bridge.
3
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page_text: 3.) To the firing contrivance mentioned under 1) the arrangement of a sliding
contrivance, represented by the racks F in connection with the cog-wheels being
on one common axle g so that by turning the axle by means of a lever etc. the racks
are moved alternately backwards and forwards for the purpose of moving the
replacing fire-bars towards the remaining bars and also the whole grate backwards..
4.) To the firing contrivance mentioned under 1) the arrangement of fire-bars in.
two parts, joined in the middle through hinges for the purpose of allowing the-
former to fall through easily into the ash-pit.
Dated thia 15th day of August 1805
For EWALD PEISELER,
Bernhard Brockhues.