IMPROVEMENTS IN FURNACES
Year: 1880

page_text: PROVISIONAL SPECIFICATION left by Edwin Ambrose Brydges at the Office
of the Commissioners of Patents on the 1st March 1880. Partly a communi-
cation by Herrmann Schaefer, of Berlin.
EDWIN AMBROSE BRYDGES, of the Firm of Brydges & Co., Engineers and Patent
Agents, No. 32, Belle Alliance Strasse, Berlin, in the Empire of Germany.
"IMPROVEMENTS IN FURNACES." [Partly a communication by Herrmann Schaefer,
of Berlin.]
This Invention relates to improvements in furnaces for steam boilers, puddling
and other furnaces, and consists of a new and original method for obtaining perfect
combustion of the coal or other fuel used in such furnaces, so that an analysis
of the gas issuing from the chimney shows nothing but carbonic acid and nitrogen
gases.
By using or applying our Invention to already existing furnaces, or to new
furnaces, perfect combustion is attained and smoke avoided.
It is well known that if an excessive quantity of air is conducted to the burning
fuel in a furnaco, the gases will be cooled, and consequently a great part of the
heat from the fire and the gases produced wasted.
In order to produce perfect combustion we conduct carbonic oxide gas to these
imperfectly consumed products of the fire.
We conduct a stream of such carbonic oxide gas behind, above, below, or to the
side of the fire, or to various parts of the same, so that the said gas can mix with
the products of the combustion of the fuel.
The gas required by our system is produced in a generator of suitable form
according to the quality of the fuel used, and the gas so produced is conducted
either direct from the generator to the fire or to the products of the said fire,
or through suitable tubes or canals from the generator to the same when it is
not convenient to construct or erect the generator in the immediate vecinity of
the furnace.
-
When it is not convenient to erect the generator immediately beside or near to
the furnace, we also prefer to use an arrangement or apparatus for heating or
superheating the gas from the generator before mixing the same with the products
of the fire in the furnace.

page_text: For this purpose we use a system of canals and two chambers or spaces fitted
with plates, bricks, or tiles arranged so as to form a kind of lattice work or
perforated mass.
The gas streams alternately through one of these chambers, escapes from the same,
and mixes with the products of the grate firing.
These chambers are alternately heated by means of a system of air and gas
canals, and this system, whereby air and gas are conducted into the base or lower
part of the canal or canals, ensures that the gas and air canals shall be entirely
full before either gas or air can escape at the low openings, so that we are able to
construct canals of any desired length, whereby the flamo of the ignited gas burns
equally throughout the entire length of the canal.
As soon as one of the chambers or compartments described is sufficiently heated,
carbonic oxide gas is let into and through the same to the products of the firing;
this heated or superheated gas mixes with the products of the fire in the furnace,
so that an even flame and perfect combustion of the fuel are achieved. During the
time that the gas is being heated in the one chamber or compartment, the second
chamber is being heated, so that as soon as the chamber first put in operation is
cooled a regulating valve can be reversed, and carbonic oxide gas cut off from the
first chamber and admitted into the second heated compartment or chamber.
The flow of the gas generated in the generator, either direct to the fire or through
the heating arrangement described, can be regulated by valves, cocks, or other
suitable arrangements.