Furnaces" and other Furnaces.
Year: 1886

page_text: Furnaces" and other Furnaces.
I, GEORGE BEARD of King's Hill House, Gartcosh, in the County of Lanark,
North Britain, Iron and Steel Works Manager do hereby declare the nature of
this invention to be as follows:-
This Invention, which relates to improvements in heating feed water for steam
boilers and in utilizing the waste heat of what are sometimes known as "low
heating furnaces," such for example as annealing or softening furnaces, first and
second heating furnaces and in some metal works known as muffles, as well as
other furnaces.
The Invention consists in utilizing the waste heat from furnaces for generating
steam, preference being given to the employment of single flue boilers for single
furnaces and double flued boilers when two furnaces are situated side by side. As
no fire box or grate is required in the flues of boilers heated according to this
Invention, I use as many cross tubes of the Galloway or similar design as can be
conveniently fixed in the flue or flues between the front and back thereof.
I erect the boiler heater on the top, along side, or at the end of the flue or flues
of the furnaces as is most convenient for the various shapes of such furnaces
connecting the neck of the flue or flues with the tube or flue of the boiler heater
and drawing the waste heat by means of a smoke box and chimney at the outer
end of the boiler or when convenient I carry the waste heat under and around the
sides thereof to a chimney.
On the top of the boiler heater I attach three stools or blocks of size suitable for
connecting the feed water pipe, outlet water pipe and the safety valves and under
the bottom I attach one stool or block for connecting the blow off and mud pipe.
The boiler heater being situated between the feed pumps or injectors, I connect
the feed inlet pipe with the pipes from the force pump and the outlet pipe with the
steam generating boiler so that by this arrangement with the force pump or
injectors at work the boiler heater is kept continuously full of water, the supply
being regulated to feed the steam generating boiler or boilers as required,

page_text: To ensure the water passing through the boiler heater, I weight the safety
valve about 10 lbs per square inch more than the weight on the steam generating
boilers.
By carefully regulating the flow of water from the force pumps or injectors
through the heater, a high temperature is obtained, the water being boiled by the
waste heat from furnaces passing through the feed water in the boiler heater on its
way to the steam generator thereby effecting economy in the use of fuel.
The essential feature of this Invention is the heating of feed water for steam
generating by the waste heat from low heating and other furnaces during the time
that the water is passing under pressure from force pumps or injectors to steam
generating boilers.

page_text: Waste Heat of what are
sometimes known
Heating Furnaces and other Furnaces.
"
66
88
Low
I, GEORGE BEARD of King's Hill House, Gartcosh, in the County of Lanark,
North Britain, Iron and Steel Works Manager do hereby declare the nature of my
invention for IMPROVEMENTS IN HEATING FEED WATER AND IN UTILIZING THE
WASTE HEAT OF WHAT ARE SOMETIMES KNOWN AS "LOW HEATING FURNACES
"
AND OTHER FURNACES and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement:―
My Invention relates to improvements in heating feed water for steam boilers in
or by utilizing the waste heat of what are sometimes known as "low heating
furnaces" such for example as annealing or softening furnaces in sheet iṛon and
steel Rolling Mills, first and. second heating furnaces in Tin Plate Rolling Mills,
and in some metal works known as muffles, as well as other furnaces.
The Invention consists in utilizing the waste heat from furnaces for heating
water for generating steam, preference being given to the employment of single
flued or return flued boilers for single furnaces, and double flued boilers when two
furnaces are situated side by side. As no fire box or grate is required in the flues
of boilers heated according to this Invention, I use as many cross tubes of the
Galloway or similar design as can be conveniently fixed in the flue or flues
between the front and back ends thereof.
I erect the boiler heater on the top, alongside or at the end of the flue or flues
of the furnaces as is most convenient for the various shapes of such furnaces,
connecting the neck of the flue or flues with the tube or flue of the boiler heater,
and drawing the waste heat, by means of a smoke box and chimney at the outer
end of the boiler, or, when convenient, I carry the waste heat through return flues
or under and around the sides thereof to a chimney.
On the top of the boiler heater I attach three stools or blocks, of size suitable
for connecting the feed water pipe, outlet water pipe and the safety valves, and
under the bottom, I attach one stool or block for connecting the blow-off and;
mud pipe.
The boiler heater being situated between the feed pumps or injectors and the
boilers to be fed with water from the said heater, I connect the feed inlet pipe
with the pipes from the force pump or injector and the outlet pipe with the steam.
generating boiler, so that by this arrangement, with the force pump or injectors at
work, the boiler heater is kept continuously full of water, the supply being
regulated to feed the steam generating boiler as required.
To ensure the water passing through the boiler heater, I weight the safety valve.
about 5 to 10 lbs. per square inch more than the weight on the steam generating
boilers.
By carefully regulating the flow of water from the force pumps or injectors
through the heater, a high temperature is obtained, the water being boiled by the
waste heat from furnaces passing through the feed water in the boiler heater on its
way to the steam generator, thereby effecting economy in the use of fuel,

page_text: In order that my Invention may be properly understood and readily carried
into effect, I will now proceed to describe the Drawings hereunto annexed.
Figure 1, is a side elevation of a low heating furnace, the products of combustion
from which are caused to pass through the flue of the water heater in accordance
with my present Invention.
Figures 2 and 3 are respectively a front and rear end elevation of the same.
Figure 4, is an elevation and Figure 5, is a plan drawn to a reduced scale,
shewing two such water heaters arranged in connection with the steam boilers, the
water supplied to which first passes through the said heaters all as hereinafter
described.
Figures 6 and 7 are front end elevations of tin-plate furnaces respectively
fitted according to two different arrangements as provided for under my present
İnvention.
Figure 8, is a side elevation of the furnace represented at Figure 7.
In carrying my present Invention into practice in the manner represented on
sheet 1, of the annexed drawings, I erect the boiler heater a, above the furnace b,
and support the said heater upon the iron joists c, and columns d, but the relative
location of the heater a, depends upon circumstances, among which may be
specially mentioned the position of the outlets or flues of the furnaces for these,
under certain cases, may necessitate the heater being placed alongside or at the
end of such furnaces.
The construction of the furnaces themselves constituting no part of my present
Invention, I shall restrict myself to a brief description of those furnaces to which
my improvements are shewn as applied upon the annexed drawings. To each of
these furnaces fuel is supplied through the opening covered by the door e, and the
flame with the products of combustion issuing from the combustion chamber first
pass over the bridge thereof into the annealing chamber of the furnace, which
chamber is closed by the end doors g, Figure 2. From this last mentioned
chamber, the products of combustion escape through flues as shewn in dotted lines
at Figures 1, 2 and 3 formed in the right and left hand corners at the front end
thereof, that is to say, in the manner common to many of such sheet or plate
annealing furnaces or chambers.
The products of combustion, after leaving the furnace in the manner herein-
last described, pass through the flues shewn more particularly in dotted lines at
Figure 2 and formed in the brickwork u, and thence through the tube or flue of
the heater a, into the smoke box h, from which they finally escape into the
atmosphere through the chimney i. The afore mentioned relative arrangement
and connection of the flue of the boiler heater a, rendering a fire box or grate,
within such boiler tube or flue unnecessary, I use as many cross tubes j, Figures 2
and 3 of the Galloway or similar design as can be conveniently fixed between the
front and rear ends of such heater.
On the upper side of the heater a, I secure the three stools or blocks k, l, and m,
and to these I secure the feed or inlet water pipe n, the outlet water pipe o, and
the safety valve p, respectively. To the underside of the heater, the stool ör
block q, is attached and to this I secure the blow-off and mud pipe r, which is
provided with the cock or valve s, and which is connected with any desired drain
or other source of outlet. The boiler heater is or may be further provided with
the gauge glass t, by which to ascertain whether it is full of water.
'
In connecting the herein before described heater with a boiler or boilera which is
or are to be supplied with hot water therefrom, the arrangement is such that the
water is first forced by a feed pump into the heater a, the safety valve p, which is
weighted to say 5 to 10 lbs more than that of the boiler, which ensures the water
passing from the heater direct to the said boiler; or, in place of employing a pump
to supply the water in the manner herein last described, the water may be supplied
to the heater by means of an injector operated by the exhaust steam from the
engine, and by means of which the water is warmed before entering the said
heater.

page_text: In the arrangement of apparatus represented at Figures 4 and 5 of the annexed
drawings, there are two heaters each constructed in the manner hereinbefore
described, and so connected as to supply hot water to three boilers. Two of these
boilers as shewn at A and B are of ordinary construction and are provided with
furnace grates and doors to be fired or stoked in the usual manner, while the
third boiler which is marked c, (represented as situated at a considerable distance
from those marked. A and B) is so constructed and otherwise arranged as to be
heated by the hot products of combustion issuing from the furnace D, .the said
products of combustion finally escaping into the atmosphere through the chimney E.
The water inlets of the heaters (these heaters are marked F and G at Figures 4
and 5) are connected by the pipe H, with the feed pump I, and a branch J, of this
pipe connects with the injector K, which is operated, by the exhaust steam from
the engine L, Figure 5, the said engine being connected therewith through the
exhaust steam pipe M. The outlets of the heaters are connected through the
pipe N, with the boilers A, B and C, and both the inlets and outlets of the said
heaters are provided with the valves O and P, respectively, so that either one of
them may be worked independently of the other. The water inlets of the boilers
are similarly provided with valves Q, so that the supply of water thereto may be
regulated as desired and to enable either of such boilers to be cut out of the series
when necessary. The steam pipe R, is connected from the boilers A and B, with
the engine L, and the branch S, from this pipe R, supplies steam to the feed
pump I.
As has been hereinbefore described, the safety valves of the heaters F and G, are
weighted to say 5 to 10 lbs per square inch heavier than the safety valves T, of the
steam generating boilers, it is therefore obvious from the hereinlast described
arrangement that the water is forced into and through the heaters F and G, and
thence through the pipe N, to the boilers A, B and C.
In applying my present improvements to tin-plate furnaces which are constructed
in pairs, that is to say, having two furnaces, one a first or high heating, and the
other a second or low heating furnace, built side by side or in one and the same
structure, the flame with the products of combustion escaping from the first or
highest heating furnace may be employed for generating steam, or along with the
flame and the products of combustion escaping from the second or lower heating
furnace it may be employed for heating water.
In the arrangement represented at Figure 6, of the annexed drawings, the flame
with the products of combustion escaping from the first or high heating furnace a¹,
pass up through the flue b¹, which is represented in dotted lines at Figure 6. By
this flue b', the said products of combustion are conducted to the flue of the steam
generating boiler c¹, after passing through which they escape into the atmosphere
through the chimney d. The steam generated by these means may be conducted
to motive power engines or employed for any other desired purpose. The flame
and products of combustion escaping from the second or low heating furnace e¹,
pass up through the flue f¹, which is represented in dotted lines at Figure 6, and
are thereby conducted to the flue of the heater g¹, through which they pass and
give off their heat to the water contained in the said heater, finally escaping into
the atmosphere through the chimney h¹.
In the arrangement represented at Figures 7 and 8, the flame with the products
of combustion escaping from the first or high heating furnace a¹, pass up through
the flue, (represented in dotted lines at Figure 7) and are thereby conducted to
one of the two flues of the water heater 11. The flue k¹, (represented in dotted
lines at Figure 7) conducts the flame and other products of combustion escaping
from the second or low heating furnace e¹, to the second of the two flues of the
heater, from which they pass into the smoke box n¹, (Figure 8) and through the
chimney o', into the atmosphere.. The smoke box n², is divided by a vertical fire-
brick or equivalent partition into two parts, each of which is provided with a
chimney respectively marked o¹, and p', for the escape of the products of combustion
from the two furnaces a¹, and e'.

page_text: It is to be observed that the flue or flues of the heaters employed under my
present Invention being throughout their length fitted with cross tubes of the
Galloway or similar type, the said flues are capable of being constructed of
increased diameter thereby ensuring uniform working of the furnaces without
obstructing the draught.
As has been hereinbefore explained, the water in the heaters employed under
my present Invention being always under a pressure greater than the pressure in
the steam generators into which it is subsequently forced, the height or other
relative position of such heaters is immaterial. When applied to gas reverberatory
furnaces, or other such furnaces, the flues or escape outlets of which are below the
floor or ground level, then the said heaters are so arranged wholly or partly below
the floor or ground level that the flues of the said heaters form continuations of the
Baid furnace flues.
Having now particularly described and ascertained the nature of my Inven-
tion and in what manner the same is to be performed, declare that what
I claim is
The general arrangement and combination of parts constituting the apparatus
for heating the feed water for steam generating by the waste heat from low heating
and other furnaces during the time that the water is passing under pressure from
feed pumps or injectors to steam generating boilers under a lower pressure than
that of the heaters employed, the said steam generating boilers being provided
with the valves Q, for regulating the supply of water thereto all substantially as
and operating in the manner hereinbefore set forth with reference to the annexed
drawings.
Dated this ninth day of August 1886.
J. H. JOHNSON, DAY & JOHNSON,
Applicant's Agents.