Improved Arrangements and Apparatus for the Utilization of the Waste Heat of Furnaces of the Open Hearth Type.
Year: 1894

page_text: Date of Application, 10th Aug., 1894
Complete Specification Left, 10th June, 1895-Accept:d, 10th Aug., 1895
PROVISIONAL SPECIFICATION.
Improved Arrangements and Apparatus for the Utilization of the
Waste Heat of Furnaces of the Open Hearth Type.
We, CHARLES JOHN BAGLEY, General Manager, and LLEWELYN ROBERTS,
Works Manager, respectively, of The Moor Steel and Iron Company, Limited, and
THE MOOR STEEL AND IRON COMPANY, LIMITED, all of Stockton-on-Tees, in
the County of Durham, do hereby declare the nature of this invention to be as
follows: :-
and
This invention relates to steel melting furnaces of the open
hearth type
consists mainly in arrangements and apparatus for intercepting and utilizing the
heat of the waste gases and products of combustion exhausted therefrom and
derives its utility as a means of economy, from the fact that as now constructed
and used the waste gases and products of combustion of such furnaces pass into
a chimney or uptake at a higher temperature than is necessary for creating the
requisite draught for the proper working of the furnace that is to say that these
gases or products of combustion at present are drawn off to waste at a temperature
which sometimes reaches 600° Fahrenheit and even more.
In carrying our invention into effect we combine with or add to the general
construction of the furnace a suitable apparatus for the generation of steam care
being taken that whilst the said apparatus offers an effective surface for inter-
cepting heat from the gases and products of combustion discharged from the
furnace, it also affords the requisite draught for the proper working of the furnace.
For instance the apparatus may take the form of a chimney enveloped for part of
its height in a water jacket and furnished with cross tubes, like a Galloway boiler,
or the like arrangement could be placed horizontally, or the steam generator may
be so constructed as to simply receive the waste products of combination on their
way to a chimney of the kind at present in use.
Dated this Orb dex of I noust 1804
3
G. J. CLARKSON,
Chartered Patent Agent,
Stockton-on-Tees, Agent for the Applicants.
Improved Arrangements and Apparatus for the Utilization of the
Waste Heat of Furnaces of the Open Hearth Type.
We, CHARLES JOHN BAGLEY, General Manager and LLEWELYN ROBERTS,
Works Manager, respectively of The Moor Steel and Iron Company, Limited,
and THE MOOR STEEL AND IRON COMPANY, LIMITED, all of Stockton-on-Tees,
in the County of Durham, 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 steel melting furnaces of the open hearth type and.
consists mainly in arrangements and apparatus which by their construction and
combination of their several parts intercept and utilize the heat of the waste gases

page_text: and products of combustion exhausted therefrom and derives its utility as a means of
economy from the fact that as now constructed and used the waste gases and
products of combustion of such furnaces pass into a chimney or uptake at a higher
temperature than is necessary for the proper working of the furnace, that is to say
these gases or products of combustion at present are drawn off to waste at a
temperature which sometimes reaches 60° Fahrenheit and even more.
In carrying our invention into effect we combine with or add to the general
construction of the furnace a suitable apparatus adapted for the generation of
steam care being taken that whilst the said apparatus offers an effective surface
for intercepting heat from the gases and products of combustion discharged from
the furnace it affords the requisite chimney draught for the proper working of the
furnace, and furthermore provision is made for supplying live or fresh gas to the
steam generator when the steel furnace is laid off, or the spent gases require
reviving; and on the other hand when it is required to lay the steam generator off
the hot gases and products of combustion are led to the chimney through a bye
pass or passage clear of the steam generator.
The accompanying drawings are intended to illustrate in what manner the
arrangement and construction of parts constituting the improvements are
incorporated with or added to an open hearth furnace of the usual type, the
steam generator being shown in the form of a horizontal boiler.
Of this arrangement and construction of parts Figure 1 is a plan view,
Figure 2 a sectional view taken on line x a of Figure 1 and Figures 3 and 4
are transverse sectional views taken on lines y y, z z respectively of Figure 1. 1n
Figure 1 a a are channels through which the gas passes into and out of the
furnace, and bb are the corresponding channels for the air. The gas is supplied
from the usual gas main a' through the gas channel a² and the air is drawn in
direct from the atmosphere; c is the chimney or uptake and as ordinarily con-
structed the products of combustion on passing out through the channels a a and
bb are led direct to the chimney e carrying away with them more heat than is
requisite to set up the chimney draught required to work the furnace. On referring
to Figure 2 it will be seen that we provide an internally flued boiler d, the
flue a of which leads into the chimney c and the hot gases and products of
combustion are collected into the bifurcated flue e first to one side and then to
the other as shown in section in Figure 3, as the valves controlling the
channels a a, b b are reversed; and from this flue e they pass through the flue d
of the boiler, and so give up a portion of their heat to be utilized in generating
steam. But in order that the boiler may be used when the hot gases and
products of combustion cannot be supplied from the furnace as for instance when
the furnace is laid off we then close the dampers j, g, and and admitting air and
live gas direct to the flue e set up the requisite combustion the live gas being
drawn in from the gas flue the connecting pipe a³ of which is shown broken off in
the drawings the connection required being readily understood. On the other
hand when it is desired to lay the boiler off, the hot gases and products of com-
bustion are led through the bye pass ; by opening the damper 9 and closing the
damper h the bye pass being suitably diverted to enable the requisite passages
and controlling dampers to be introduced and manipulated as required.
The steam generator can also be provided in the form of a water jacket to the
lower part of the chimney c, Galloway tubes being provided to intercept the heat
and equivalent provisions are made for admitting live gas or taking the hot waste
gases and products of combustion through a bye pass as have already been
described with reference to a horizontal boiler.
Having fully set forth and described our said invention and the manner of
performing the same we wish it to be understood that we are aware that the
waste heat derivable from the products of combustion given off from furnaces of
various kinds have been utilized by intercepting the waste heat thereof and we
therefore make no claim to such method or principle otherwise than as embodied

page_text: in and carried into practice by our improvements as above described and what we
claim is :-
The combination of parts constituting as a whole an improved furnace of the
open hearth type in which the waste gases and products of combustion are inter-
cepted and utilized for the generation of steam substantially as hereinbefore
described and illustrated by way of example in the accompanying drawings.
Dated this 8th day of June 1895.
G. J. CLARKSON,
Chartered Patent Agent,
Stockton-on-Tees, Agent for the Applicants.