Improvements in and relating to Steam Boiler and other Furnaces for Consuming Smoke, Utilizing Heat, and Saving Fuel.
Year: 1894

page_text: Date of Application, 29th Jan., 1894
Complete Specification Left, 17th Oct., 1894-Accepted, 17th Nov., 1894
PROVISIONAL SPECIFICATION.
Improvements in and relating to Steam Boiler and other Furnaces
for Consuming Smoke, Utilizing Heat, and Saving Fuel.
I, WILFRED LORD, of Regent Street, Belle Vue Wakefield, in the County of
York, Engineer, do hereby declare the nature of this invention to be as follows:-
My invention has reference to improvements for consuming smoke in steam
boiler and other furnaces, and to provide for the burning of the lowest kind of fuel
whereby its calorific value may be fully utilized without destroying the efficiency of
the firebars.
My invention is particularly applicable to such furnaces as are fitted with firebars
constructed according to Patent No. 12293 of 1890.
my
According to my invention I preferably form a series of chambers or channels
underneath the furnace or firebars from the front or dead plate of the furnace to
the bridge. Into each of these chambers or channels I inject a mixture of air and
steam by providing each of the said chambers or channels with means consisting of
a tapering air tube within which is a tapering steam tube connected to a steam
supply pipe, and so adapted that on the passage of the steam, air is drawn in or
injected into such chamber or channel and mixes with the products of combustion
by passing under and through the firebars, so preventing the formation of dense
smoke and creating a heat or temperature which prevents condensation of the steam,
and by this means prolongs the duration of the efficiency of the firebars by
preventing fusing and clinkering.
In close proximity to and projecting over the bridge is a hollow chamber (made
of earthenware, fireclay, or other suitable material) having perforations or slits.
This chamber is provided with an air tube within which is a steam tube through
which the steam is passed so drawing in air, which, along with the steam passes
into the said chamber, and through the said perforations or slits and mixes with the
smoke and products of combustion so increasing the temperature of the furnace and
distributing the heat onto the sides of the furnace, so increasing the efficiency of
the furnace as a steam raiser and effecting a saving in the consumption of fuel.
The front bars may be arranged so as to form a rib, or arched part, if preferred,
for this purpose the dead plate will be prolonged and the front fire bar arranged so
as to carry this into effect.
Instead of forming a series of chambers or channels under the furnace as before
explained one or two chambers may be provided, if preferred, and fitted with
injecting apparatus, as before set forth.
The chambers or channels aforesaid are fitted with hinged doors for letting dust
drop through, these doors are connected to a lever or rod at the front of the
furnace or boiler so that they can be operated simultaneously, or they may be so
arranged as to be operated independently.
DL: CL
1004
JOHN E. WALSH,
Royal Exchange Chambers, Boar Lane, Leeds,
Patent Agent to the Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements in and relating to Steam Boiler and other Furnaces
for Consuming Smoke, Utilizing Heat, and Saving Fuel.
I, WILFRED LORD, of Regent Street, Belle Vue, Wakefield, in the County of
York, Engineer, 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 has reference to improvements for consuming smoke in steam
boiler and other furnaces, and to provide for the burning of the lowest kind of fuel,
whereby its calorific value may be fully utilized, without destroying the efficiency
of the firebars.
My invention is particularly applicable to such furnaces as are fitted with
firebars constructed according to my Patent No. 12,293 of 1890.
DESCRIPTION OF DRAWINGS.
Fig. 1, is a front elevation of double flued boiler with my improvements applied,
the right hand flue showing the injecting apparatus in connection, with a series of
chambers or channels as hereinafter explained, the left hand flue shows the
position of such series of chambers or channels, the injecting apparatus and doors
being removed.
Fig. 2, is a longitudinal section through flue of boiler.
Fig. 3, is a detail end view of channel or chamber, as shown in Figs. 1 and 2.
Fig. 4, is a front elevation showing single flue with one chamber or channel in
lieu of a series of chambers or channels as shown in Figs. 1, and 2.
Fig. 5, is a longitudinal section of Fig. 4.
Fig. 6, is a sectional detail view showing modification of steam jet or injecting
apparatus.
According to my invention I preferably form a series of chambers or channels A
(see Figs. 1, 2 and 3) underneath the furnace or firebars B from the front or dead
plate of the furnace to the bridge D. Into each of these chambers or
channels AI inject a mixture of air and steam by providing each of the said
chambers or channels A with means consisting of a tapering air tube E within
which is a tapering steam tube F connected to a steam supply pipe G, and so
adapted that on the passage of the steam, air is drawn in or injected into such
chamber or channel A and mixes with the products of combustion by passing
under and through the firebars B, so preventing the formation of dense smoke
and creating a heat or temperature which prevents condensation of the steam
and by this means prolongs the duration of the efficiency of the firebars by
preventing fusing and clinkering.
In close proximity to and projecting over the bridge D is a hollow chamber H
(made of earthenware, fireclay, or other suitable material) having perforations or
slits J. This chamber is provided with an air tube K within which is steam
tube L through which steam is passed, so drawing in air, which along with the
steam passes into the said chamber H, and through the said perforations or
slits J and mixes with the smoke and products of combustion, so increasing the
temperature of the furnace and distributing the heat on to the sides of the furnace,
also increasing the efficiency of the furnace as a steam raiser, and effecting a saving
in the consumption of fuel.
Instead of forming a series of chambers or channels under the furnace, or firebars
as before explained, one or two chambers may be provided, if preferred, and fitted
with the injecting apparatus as before set forth.
Figs. 4, and 5, show this carried out, one chamber only being employed.
According to these figures A' is a chamber having a sloping or inclined bottom.
This chamber is made in two halves so as to facilitate fitting into the furnace.

page_text: At the top end it rests upon the bridge D, and at its lowered end is sustained in
position by a projecting lip upon the inside of the front plate of the boiler, or other
convenient means.
The sides of the said chamber A' are formed with ribs or ledges upon which the
firebars rest when they are placed in position across the said chamber.
but
The front dead plate C also rests upon the sides of the said chamber A¹, and the
back dead plate C¹ also rests partly upon the sides of the said chamber A',
mainly upon the bridge D.
This back dead plate C' is in section, similar to an angle iron, and is fronted in
by brickwork.
Into the said chamber A' a mixture of steam and air is injected by means of the
tapering air tubes E, (one placed at each side of the flue) within which is a
tapering steam tube F, connected to a steam supply pipe G, and so adapted that on
the passage of the steam air is drawn in or injected into such chamber, with the
action or results previously pointed out with reference to Figs. 1, 2, and 3.
The hollow perforated chamber H is arranged near the bridge D as before
referred to.
A tube K¹ passes from the chamber A' to the chamber H and passes steamı
and air from the chamber A' to the chamber H, through the perforations or
slits J, and causes such to mix with the products of combustion as before explained.
The chambers or channels A as shown in Figs. 1, to 3, are fitted with hinged
doors L for letting dust drop through into the flue M from which it is removed
through the door N. O is the firing door.
The hinged doors P are connected to a lever or rod at the front of the
furnace or boiler so that they can be operated simultaneously or they may be
so arranged as to be operated independently.
The chamber A' see Fig. 5 is provided with a hinged door P¹, connected to a
rod by which it can be raised or lowered, for regulating the passage of the
mixture of air and steam through the tube K' into the chamber H.
By means of the chamber A¹as aforesaid, the bottom flue M as shown in
Fig. 2 is dispensed with and this part of the boiler is sealed from the admission
of cold air so that the heat of the furnace is kept more uniform, and the
efficiency and wear of this part of the boiler greatly increased, as well as
effecting a saving in the consuniption of fuel.
In Fig. 6 is shown a section of my improved injecting apparatus, which
consists of a taper tube E within which is a steam jet F connected to a steam
supply pipe G by union G¹. The said jet F is made with internally. tapered or
conical shaped ends joined by the passage E. The end F and cone F*
spreading the steam against in inside of the tube E and causing a better
admixture of the air and steam.
The said jet F may be provided with only one internal tapered or conical
shaped end (for spreading the steam as aforesaid).
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. In a steam boiler or other furnace, the combination of a series of chambers or
channels arranged under the firebars with a series of injectors for passing a
mixture of air and steam into such furnace, substantially as and for the purposes
set forth.
2. In a steam boiler or other furnace, the combination with a series of chambers
or channels arranged under the firebars and having a series of injectors for passing
a mixture of air and steam into such furnace, of a perforated hollow chamber,
arranged near the bridge of the furnace, or near to the fire, and provided with an
injector for passing air and steam into the said chamber, and through its
perforations or slits, in the manner and for the purposes such as shown and
described.

page_text: 3. In a steam boiler or other furnace the combination of the chambers or
channels A, firebars B, air tubes E, steam jet F, steam supply pipe G, hollow
chamber H having perforations J, air pipe K, and steam pipe or jet L, as and for
the purposes set forth with reference to Figs. 1, 2 and 3 of the drawings annexed.
4. In a steam boiler or other furnace, the combination of a chamber having a
sloping bottom arranged under the firebars to form a flue or ashpit thereunder, and
seal or close the lower part of the boiler so as to prevent access of cold air thereto,
substantially as shown and described.
5. In a steam boiler or other furnace, the combination of a chamber having a
sloping bottom arranged under the firebars to form a flue or ashpit thereunder, and
seal or close the lower part of the boiler, so as to prevent access of cold air thereto,
with injectors for passing a mixture of air and steam into the said chamber,
substantially as shown and described.
6. In a steam boiler or other furnace, the combination with a chamber having a
sloping bottom arranged under the firebars to form a flue or ash-pit thereunder
and seal or close the lower part of the boiler to prevent access of cold air and
provided with injectors, of a perforated hollow chamber arranged near to the
bridge, or near to the fire, for passing a mixture of air and steam into the hot gases
of the furnace, substantially as shown and described.
7. In a steam boiler or other furnace, the combination of the chamber A',
firebars B, air pipe E, steam jet F, steam supply pipe G, hollow chamber H, having
perforations or slits J, and pipe K', substantially as shown and described with
reference to Figs. 4, and 5, of the drawings annexed.
8. In a steam boiler or other furnace, the combination of a hollow perforated
chamber projecting over the bridge of the furnace for passing a mixture of air and
steam into the hot gases of the furnace, substantially as shown and described.
9. In a steam boiler or other furnace, the combination with a taper air tube E
of a steam jet F having an internally tapered or cone shaped aperture or end Fl
with cone F, for spreading the steam against the inside of the said pipe, and
causing it to mix better with the air drawn in, substantially as shown and
described.
Dated this 16th day of October 189.1
JOHN E. WALSH,
Royal Exchange Chambers, Boar Lane, Leeds,
Patent Agent to the Applicant.