Improvements in Destructor Furnaces.
Year: 1893

page_text: Date of Application, 9th Dec., 1893
Complete Specification Left, 17th May, 1894-Accepted, 23rd June, 1894
PROVISIONAL SPECIFICATION.
Improvements in Destructor Furnaces.
We, SAMUEL JOHNSON BEAMAN of 96 Bewsey Road, Contractor, and
JAMES DEAS of 35 Folly Lane, Engineer, both of Warrington in the County of
Lancaster, do hereby declare the nature of this invention to be as follows:-
This invention relates to the type of destructor furnaces in which an inclined
feeding hearth, a reverberatory arch, and a perforated screen are employed.
According to our present invention we may arrange above the inclined hearth
upon which the material is supplied to the furnace, a perforated firebrick hood.
The hearth also may be perforated or constructed with passages for the admission
of air to the material thereon. It may be constructed to a plane inclined surface
or as a series of inclined steps, or inclined steps may be used in combination with a
plane surface.
In addition to the perforated screen and between it and the furnace, we may
employ a bridge between which and the screen a chamber will thus be formed
which will permit dust to settle and in which meat tins and other similar waste
metal may be placed for the recovery of the metals, the heat being sufficient to
quickly melt the solder. In this chamber also infected beds and other articles
may be cremated.
An additional supply of hot or cold air may be introduced into the chamber,
by any of several suitable means, thus converting the space into a secondary
combustion chamber.
According to one method of introducing air into this chamber, the bridge may
be made hollow with perforations or openings from its interior to the chamber. The
hollow part of the bridge may communicate with the external air and preferably
through the walls of the furnace which are built with cavities or passages therein
for the purpose so that the air is heated before reaching the bridge.
By another method the air may be delivered downward into the chamber from
its roof, or it may be introduced from below or the sides or from two or more
directions.
Dated this 7th day of December A.D. 1893
WILLIAM E. HEYS,
Agent for the Applicants.
COMPLETE SPECIFICATION.
Improvements in Destructor Furnaces.
We, SAMUEL JOHNSON BEAMAN, of 86 Bewsey Road, Contractor, and
JAMES DEAS of 35 Folly Lane, Engineer, both of Warrington in the County of
Lancaster, 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 that type of destructor furnaces in which an inclined
feeding hearth, a reverberatory arch and a preforated fire-brick screen are employed.
According to our present invention, we may arrange above the inclined feeding
and drying hearth over which the matters to be destroyed are supplied to the
furnace, an auxiliary perforated fire-brick hood. The hearth itself also may be
perforated for the admission of air to the material thereon or for the outlet from the:
ГР. 871

page_text: furnace of not gases, and it may be constructed to a plane or curved inclined surface
or as a series of steps.
In addition to the vertical perforated fire-brick screen we employ a bridge or
dwarf wall, which, with the screen and side walls will form a chamber, and this
chamber will serve to catch dust, and in it meat tins and other similar waste metal
may be placed for the recovery of the metals, the heat being sufficient to quickly
melt the solder. In this chamber also, infected bedding, clothing and other articles
of a similar nature may be cremated.
Various known methods may, if desired, be employed for the purpose of
introducing an additional supply of hot or cold air into the chamber, thus con-
verting the space into a secondary combustion chamber. Thus, according to one
method, the bridge may be made hollow, with perforations or openings from its
interior to the chamber, the hollow part of the bridge communicating with the
external air direct or through hollow parts or passages in the furnace walls, so
that the air is heated before reaching the bridge. Or the air may be delivered
downward into the chamber from the roof or be introduced from below or from
the sides or from two or more directions.
We will more fully describe our said invention with reference to the accompanying
drawings in each of the figures of which similar parts are denoted by similar
letters :-
•
"
-
Figure 1 is a vertical longitudinal section,
Fi
Fi
Figure 2 is a horizontal section taken along the line, Figure 1.
Figure 3 is a longitudinal section of a modified form of construction.
Fi igure 4 shews in vertical longitudinal section, and
Figure 5, in front elevation, a further modification in construction.
In each of the figures similar parts or details of construction are denoted by
similar letters of reference.
A is the reverberatory arch which is constructed of or lined with fire-bricks and
which in each case extends over the furnace B and feeding hearth C. The feeding
hearth upon which the matters to be destroyed are supplied to the furnace, is more
or less inclined or modified as hereinbefore described, according to the materials to
be dealt with, the form and inclination represented by Figure 1 being appropriate
for ordinary town's refuse. As shewn by the drawings, Figure 1, the hearth
terminates above the level of the furnace grate upon a narrow parapet which
serves to back up the material but which may be omitted, especially when the door
or doors G are arranged at'the side of the furnace.
The form of hearth shewn in Figure 3 may be employed when greener or
damper matters than ordinary town's refuse has to be destroyed. In this case,
it has two angles of inclination, of which the forward and upper part is the
steeper. Figure 4 shews a modification in which the hearth extends right down to
the dead plate.
In some exceptional cases we may employ an auxiliary perforated hood E' above
the feeding hearth, as shewn by Figure 3. This is intended for use only in cases
when green vegetable matters such as bagasse have to be destroyed.
The
At the back of the furnace there are a perforated vertical fire-brick screen I
and a fire bridge or dwarf wall H, also constructed of fire brick, which thus
enclose two sides of a chamber or space J, the other sides of which are formed by
a continuation of the furnace walls and of the reverberatory arch A.
temperature of this chamber, whilst the furnace is in use, being very high, it may
be employed for the destruction therein of infected bedding clothing and the like,
and for the cremation of any fumes escaping from the furnace. Old meat tins and
preserved food tins may also be placed in this chamber for the separation and
recovery of the metals by the fusion of the solder.
In the form represented by Figures 1 and 2, the fire-bridge is perforated and
hollow, its perforations placing the interior of the bridge in communication with
the chamber J. The interior of the bridge also communicates with the external
air through cavities or passages K in the side walls of the furnace with the outer

page_text: air, and the entrances to these cavities may be adjustably controlled by dampers-
doors and the like. This construction is known and is one only of the methods
which we may employ for the purpose of introducing heated air into the chamber J,
and thus converting it into a secondary combustion chamber. In this case, the
bridge is arranged in front of the screen, but their relative positions may be.
reversed as shewn by Figure 3, particularly when dealing with damp materials.
A suitable door is provided at one or both sides of the chamber J for the
insertion and removal of the matters treated therein.
When the bridge is arranged behind the screen, it may be solid as shewn by
Figure 3, and this construction may also be employed when it is arranged in front
of the chamber.
The matters to be destroyed are fed upon the upper part of the inclined hearth
through the opening F in the usual manner, and become dried and heated thereon..
From the bottom of the hearth they are pushed from time to time upon the grate.
by the attendant who introduces tools suitable for the purpose through the doors G
by which access for cleaning the fires is also obtained. The furnace bars may be
of the usual or any suitable construction and the ash-pit G¹ may be open or closed
according as natural or forced draught is used. When forced draught is used, we
may employ the known device of a horizontal perforated plate or grid M²,
Figure 4, in the ash-pit for the purpose of breaking up the stream of air supplied
through the conduit M. Doors may in this case be arranged above the plate M'
for the removal of clinkers and other solid matters falling through the furnace
grate.
From the chamber J the hot gases pass through the perforated screen or over
the bridge as the case may be, and may be utilised for example in heating the
contents of the boiler L.
The supply of air under forced draught may be controlled by means of a door
or damper N and its handle O.
We have shewn the furnace grate in each case as being in a precisely hori-
zontal position, but we do not limit ourselves to this, as a slight inclination may be
given to it.
Having now particularly described and ascertained the nature of our said.
invention and in what manner the same is to be performed, we declare that what.
we claim is :-
A destructor furnace consisting essentially of a flat or inclined furnace grate, an
inclined feeding hearth, a reverberatory arch extending over the grate and hearth,
a vertical perforated fire-brick screen, a fire bridge, and a chamber formed
between the screen and the bridge, constructed and arranged substantially as and
for the purpose hereinbefore described and as illustrated by the accompanying.
drawings.
Dated this 16th day of May A.D 1894.
WILLIAM E. HEYS,
Agent for the Applicants..