Improvements in or relating to Steam Boiler and other Furnaces.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Improvements in or relating to Steam Boiler and other Furnaces.
I, GEORGE BEESLEY, of 60, Chester Lane, Sutton, near St. Helens, in the County
of Lancaster, Brick Manufacturer, do hereby declare the nature of this invention
to be as follows:-
This invention has for its object a method of obtaining more perfect combustion,
economy in fuel and the prevention of smoke in the furnaces of boilers for
generating steam and other furnaces or heating apparatus.
By my present invention I increase the draught of the furnace and assist in
the consumption of smoke and economy in fuel by locating an arch of firebrick
or other suitable material in the furnace immediately in proximity to the door
hole, through which are formed a series of passages or nozzles for injecting air
into the fire. These passages or nozzles communicate with a hollow chamber,
also by preference semicircular in shape, adjacent to the furnace front and sup-
plied with air by means of a pipe which leads to a forced draught or other source
of air supply, or in place of compressed air, the air can be forced into this pipe
by means of a steami jet, or it may be simply a pipe open to the atmosphere in
which cases it may terminate in a bell mouth. The pipe extends through the flue
wall into the flue, by preference one of the flues underneath the boiler, and it is
then given a bend and passed back again through the flue wall, or it may be kept
inside the flue if desired. In either case it is then turned in an upward direction
to the hollow chamber aforesaid. The object of passing this pipe through the
flues is to heat the atmospheric air drawn into the pipe before it is injected into
the furnace through the passages or nozzles in the fireclay arch. The pipe may
be provided with means for regulating the air supply.
Improvements in or relating to Steam Boiler and other Furnaces.
I, GEORGE BEESLEY, of 60, Chester Lane, Sutton, near St. Helens, in the County
of Lancaster, Brick Manufacturer, 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 has for its object a method of obtaining more perfect combustion,
economy in fuel and the prevention of smoke in the furnaces of boilers for
generating steam and other furnaces or heating apparatus.

page_text: The invention will be understood from the following description, reference
being had to the accompanying drawings, in which,
Figure 1 is a front elevation of my invention for obtaining more perfect com-
bustion, economy of fuel and prevention of smoke in furnaces;
Figure 2, a vertical section through the smoke flue;
Figure 3, an elevation of the rear of the firebrick arch;
Figure 4, a vertical fragmentary section through the furnace flue;
Figure 5, a detail view of one of the bricks composing the firebrick arch.
By my present invention I increase the draught of the furnace and assist in
the consumption of smoke and economy of fuel, by locating an arch A of fire-
brick or other suitable material in the furnace immediately in proximity to the
door hole B, through which is formed a series of passages or nozzles C for inject-
ing air into the fire. These passages or nozzles communicate with a hollow
chamber D also by preference semi-circular in shape, adjacent to the furnace
front, and supplied with air by means of a pipe E, which may lead to a forced
draught or other source of air supply, or in place of compressed air the air can
be forced into this pipe by means of a steam jet, or it may be simply a pipe open
to the atmosphere as shown in the drawing, in which case it terminates in a bell
mouth F. The pipe E extends through the flue wall H into the flue G, by
preference one of the flues at the side of the boiler, and it is then given a bend
and passed back again through the flue wall terminating at the outside with the
bellmouth part F fitted with regulator I, or it may be kept inside the flue if
desired. In either case it communicates with the hollow chamber D. The object
of passing this pipe through the flue is to heat the atmospheric air drawn into the
pipe before it is injected into the furnace through the passages or nozzles C in
the fireclay arch A. The regulator I is for regulating the air supply.
The firebrick arch A is by preference composed or built up of bricks of the
kind indicated in Figure 5, and may be supported by means of the metallic arch J.
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 improvement in furnaces for increasing the draught thereof and assist-
ing in the consumption of smoke and economy in fuel, which consists in locating
an arch of firebrick or other suitable material in the furnace immediately in
proximity to the door hole through which are formed a series of passages or
nozzles for injecting air into the fire, said arch being supplied with air by means
of a pipe leading to a forced draught or other source of air supply, or simply a
pipe open to the atmosphere, substantially as described.
2. In a furnace, the combination with a perforated firebrick arch, of a pipe
leading therefrom into the smoke flue and then by a bend passed back through
the flue wall to the outside where it is open to the atmosphere, whereby the induced
draught of air which is drawn into the fire through this pipe, is heated by the
hot gases in the flue before it is injected into the furnace through the perforated
firebrick arch, substantially as described.
WM. P. THOMPSON & Co.,
Patent Agents, of Liverpool, Manchester, Birmingham, & London