Improvements in Smoke Consuming Apparatus.
Year: 1893

page_text: 1893
Date of Application. 10th Feb.,
Complete Specification Left. 4th Nov., 1893-Accepted, 9th Dec., 1893
PROVISIONAL SPECIFICATION.
Improvements in Smoke Consuming Apparatus.
I THOMAS LESTER of 7 Hornby Street, Tonge, near Manchester, in the County
of Lancaster, Engine Tenter, do hereby declare the nature of this invention to be
as follows:-
My said invention relates to improved apparatus for effecting the combustion of
Instead of attempting to burn the
smoke in steam boiler and other furnaces.
smoke in the furnace at the same instant that it is generated from the fuel, I allow
the smoke to pass through the flues and through the economiser, if such should be
used, and then cause it to return by another passage to the front of the furnace
into which it is forced and burned.
In carrying my invention into effect I arrange a conduit extending from the back
of the boiler flues or from the back of the economiser, if such is used, to the front
of the boiler or boilers. This conduit is connected to a fan which draws the smoke
forwards and impels it through another conduit to the front of the furnace or
furnaces. The fan is boxed in and a supply of atmospheric air is admitted to the
bearings and allowed to mingle with the smoke. The front of the furnace is closed
in and a branch from the conduit conducts the smoke and air beneath the dead
plate and bars of the furnace. The dead plate is perforated to allow the smoke to
rise into the furnace and a portion of the smoke also passes up between the bars.
Coming into contact with the red fuel and meeting the flame in the furnace the
A smoke vent is provided at the rear end of the
0 smoke is ignited and burned.
flues through which the products of combustion can be allowed to pass when
required by the manipulation of suitable dampers. The plate which boxes in the
lower half of the furnace front, is hung on hinges so that it can be raised to allow
ash to be raked from the bottom of the flue. The conduits for returning the smoke
5 to the furnace or furnaces are so arranged as not to interfere with the opening and
closing of the furnace doors.
10nd dow of Mar 1 1002.
E. K. DUTTON & Co.,
5, John Dalton Street, Manchester, Agents.
COMPLETE SPecification.
Improvements in Smoke Consuming Apparatus..
I THOMAS LESTER of 7 Hornby Street, Tonge, near Manchester, in the County
of Lancaster, Engine Tenter, 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 and accompanying drawings:-
My said invention relates to improved apparatus for effecting the combustion of
smoke in steam boiler and other furnaces.
Instead of attempting to burn the smoke in the furnace at the same instant that
it is generated from the fuel, I allow the smoke to pass through the flues and
through the economiser, if such should be used, and then cause it to return by
another passage to the front of the furnace into which it is forced and burned.
In carrying my invention into effect I arrange a conduit extending from the back
of the boiler flues or from the back of the economiser, if such is used, to the front
of the boiler or boilers.
This conduit is connected to a fan which draws the smoke forwards and impels
it through another conduit to the front of the furnace or furnaces. The fan is

page_text: boxed in and a supply of atmospheric air is admitted to the bearings and allowed to
mingle with the smoke. The front of the furnace is closed in and a branch from
the conduit conducts the smoke and air beneath the dead plate and bars of the
furnace. The dead plate is perforated to allow the smoke to rise into the furnace
and a portion of the smoke passes up between the bars. Coming into contact with
the red fuel and meeting the flame in the furnace the smoke is ignited and burned.
A smoke vent is provided at the rear end of the flues through which the products
of combustion can be allowed to pass when required by the manipulation of suitable
dampers. The plate which boxes in the lower half of the furnace front, is hung on
hinges so that it can be raised to allow ash to be raked from the bottom of the flue.
The conduits for returning the smoke to the furnace or furnaces are so arranged as
not to interfere with the opening and closing of the furnace doors.
To render my invention more fully understood I will now proceed to describe the
same more particularly-with-reference to the annexed sheet of drawings.
Fig. 1 is a front view of a couple of double flued boilers and an economiser
chamber partly in section.
Fig. 2 is a section of the front of one of the boilers.
Both views are diagramatic representations rather than actual drawings of the
invention.
The two boilers A and B are supported in brick setting C in the usual manner.
Instead of attempting to burn the smoke as it is generated in the furnace, which is
the usual manner, I draw the smoke over the bridge a and away through the flue b
to a flue at the back which does not appear in the drawings. This back flue
conducts the smoke to the chamber c which contains the economiser pipes d. The
pipes are fitted with travelling scrapers as is usual in economisers.
The smoke is now drawn from the economiser by a fan D, which is driven in any
suitable manner, so as to draw the smoke from the economiser and force it along a
conduit E. The conduit E branches downward and then leads off at E' E' on each
side so as to conduct the smoke in front of the furnaces of the two boilers.
At points opposite to the furnaces the smoke is discharged into the furnaces
through the outlets e e'.
The smoke from the outlet e is discharged beneath the furnace bars f and rising
between the bars is ignited and burned by coming into contact with the incandescent
fuel resting on the bars. It must be understood that the fan D also draws in and
propels forward a sufficiency of air to oxygenise the smoke and so cause it to burn
more freely. The upper outlet e' discharges a portion of the smoke above the
furnace bars.
Air also enters to the furnace through the perforated furnace door g. The front
of the flue beneath the furnace door g is boxed in by a hinged plate i which can be
lifted so as to allow ash to be raked out from beneath the furnace bars. The
outlet branches e¹ are shaped as in Fig. 1 so as not to interfere with the opening
and shutting of the furnace doors g. The delivery of the smoke may be controlled
by dampers h.
A stack vent may be situated at the end of the flues to take the smoke away in
the usual manner if required.
The entrance to this is controlled by a damper.
The arrangement shown in the drawing need not be adhered to as the economiser
could be behind the boilers instead of at the side. In some cases also where no
economiser is used the smoke is taken directly back to the front of the boiler
furnaces instead of passing through an economiser as shown.
The fan also might be situated at another point than where shown and a forcing
apparatus other than a fan might be used.
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 general arrangement for consuming smoke and gaseous products of

page_text: combustion in steam boilers and other furnaces substantially as described ana
shown.
2. The indicated smoke consuming arrangement consisting of means for drawing
the smoke from the furnace and returning it by a fan or other forcing apparatus
either direct, or through an economiser when such is used, to the front of the
furnace into which it is discharged and therein burned substantially by the means
and in the manner hereinbefore described and shown.
Ontaha 1903
E. K. DUTTON & Co.,
5, John Dalton Street, Manchester, Agents.