IMPROVEMENTS IN AND APPLICABLE TO OVENS AND FURNACES FOR THE UTILIZATION AND APPLICATION OF THE HEAT THEREOF AND THERETO
Year: 1879

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PROVISIONAL SPECIFICATION left by Walter Alfred Barlow at the Office
of the Commissioners of Patents on the 17th January 1879. A communi-
"
cation from abroad by Edward Tavernier, of Paris, France, Manager of the
Société Anonyme d'Exploitation des Procédés Fabre.
33
WALTER ALFRED BARLOW, of 6, St. Paul's Churchyard, London, Patent Agent
and Engineer.
"IMPROVEMENTS IN AND APPLICABLE TO OVENS AND FURNACES FOR
THE UTILIZATION AND APPLICATION OF THE HEAT THEREOF AND THERETO." A
communication from abroad by Edward Tavernier, of Paris, France, Manager of the
'Société Anonyme d'Exploitation des Procédés Fabre."
This Invention relates to certain improvements upon Letters Patent dated the
10th of December 1877, No. 4683, the same being a communication from Edouard
Fabre, of Paris, France, in the Specification whereof is described a very simple
apparatus permitting the utilization of the radiant heat oxisting under the sole of
metallurgic ovens in order to warm the air intended to feed the hearth, and so to
effect very great economy.
The 1st. object is to utilize the heat in the apparatus used for evaporating
liquids.
The apparatus to which that Invention has been applied are of two kinds,-
1st. Steam boilers, fixed or movable; and 2nd., ovens used for manufacturing
soda or potash, such as "Porion's ovens.'
It is understood that all ovens in which is produced at the same time a calci-
nation of matters and an evaporation or condensation of liquids are able to receive
such an application, and consequently belong to this Invention.
In applying the Invention to steam boilers the apparatus is arranged in the
following manner :-The flame is caused to pass into a flue, of which the superior
part is formed by the boiler, and the inferior and lateral parts are formed of cast
iron plates.
These plates occupy the whole length of the hearth or furnace, as well as the
whole height reserved to the hearth.
Parallel to these plates a certain number of similar plates are arranged, according
to Fabre's system.
The plates equally distant from each other form horizontal intervals on the
bottom of the hearth and vertical intervals on the sides, in which is introduced a
series of bars, their edges being of the shape of a T or otherwise. The assembling
of these bars form a series of small flues, making a way for the air, and dividing
the mass of air into small volumes or currents, which remain a certain time in
[Prin 71

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contact with the hot surface of the flues, and are carried under the grate of the
furnace, which is closely shut up at its sides.
To the air a serpentine movement may be given of greater or less length before
it is introduced under the grate by multiplying the number of the beds of air and
directing divisions or plates. The asperated air may also be caused to circulate
through such parts of the system as is desired, for instance, into the flue. In the
case of boilers arranged with returning flames the system contains separations in
masonry. In that case according to this Invention these separations are done away
with, and there is substituted for them air tubes, such as those hereinbeforo
described, which tubes will guide the flames. The apparatus may be constructed
in any material which is a good conductor of the heat, but it is preferred to have it
made in cast iron.
In certain apparatus gas at a high temperature produced by the distillation of
the coals in a close chamber or retort are brought in contact with currents of air,
which inflame them and complete the combustion, and to this class of apparatus
this Invention is applied in order to bring currents of hot air in contact with the
gas coming from the close chamber.
It will be necessary to modify the dispositions of the "Fabre's" apparatus when
the flames are to act on the retort in order to help the distillation of the coals
before coming under the boiler, but whatever may be the disposition of the air
pipes any ordinary or gazogene hearth in which the radiant lost heat is utilized
for elevating the temperature of the feeding air belong to this Invention.
This Invention is also applicable to ovens for soda or potash, wherein is utilized
either the heated air conducted under the "sole" of the oven for feeding the hearth
to produce an elevation of temperature of the flame, or in utilizing the heated air
for producing the evaporation of the liquids placed in basins on the passage of the
flames.