Improved Method of and Apparatus for Treating Gaseous Combustion Products and Utilising the same in Furnaces and the like.
Year: 1898

page_text: Date of Application, 17th May, 1898-Accepted, 5th Nov., 1898
COMPLETE SPECIFICATION.
Improved Method of and Apparatus for Treating Gaseous Combustion
Products and Utilising the same in Furnaces and the like.
We, FRANZ THIELE and ADAM RÖTTGER, both of Glössingen, near Oeventrop,
Westphalia, in the German Empire, Mechanics, do hereby declare the nature
of this invention and in what manner the same is to be performed, to be particu-
larly described and ascertained in and by the following statement:-
Our invention relates to improvements in that system of firing steam boilers
in which a portion of the heating gas is supplied below the grate. In the present
application, however, it is not the gases which have been drawn off which are
again brought to the fire, but it is intended that there shall be a preliminary
distillation, whereby there can be obtained from the gases products such as tar
and the like. The gases thus obtained are conducted to an interposed collecting
reservoir from which the same can be again brought either wholly or partially
for the supply of the boiler heating, or partially for the heating of a stove, or
other like purposes.
In the drawing Figure 1 shews the combination of such parts constituting this
invention.
The bricked-in boiler A is connected by means of a system of tubes with the
other apparatuses. The tube g receives the heating gases and the purifying gases
are again led back through the tube f to the furnace. The fan E aspires through
the tube c the said gases, whereby the same firstly pass through a coil of pipes
placed in a water reservoir C. In this coil the tar is deposited, and flows into
the vessel D. From this the tar can be let off through the cock h at the bottom
of the apparatus, whilst the gases aspired by the fan pass into the chamber F.
The vessel C can also serve as preliminary receiver for the feed, water, because
the gases passing through the coil in consequence of their high degree of heat
will warm the water in the vessel C. The vessel F acts as a gasometer, and the
pressure therein can be regulated by the usual means. In front of the fan E
there is placed a funnel shaped piece H with interposed valve so that fresh air
can be also delivered into the collecting vessel F.
The operation of the fan can be effected by means of a little hydraulic motor
connected to a convenient water tube. The collecting space F contains at the
top a safety valve as well as a discharge cock.
The regulation of the admission of air can be effected by means of the valve d,
or by means of a slower or quicker revolution of the fan.
The ash pit of the boiler is closed hermetically. There will consequently exist
in the present arrangement a continuous circulation of the heating gases or of
the used air, which from time to time, by means of the fan E, is replaced by
fresh air.
The advantages are:-The doing away with the chimney, important saving
in fuel, and the exact regulation of the air supply independently of the weather.

page_text: Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we claim is:-
The improved system of steam boiler firing with artificial draught in which
the purified fire gases passing through a collecting apparatus are returned
wholly or partially to the fire, substantially as described.
1000
W. P. THOMPSON & Co.,
322, High Holborn, London, W.C., Patent Agents for the Applicants.