Improvements in Smoke-consuming Furnaces.
Year: 1889

page_text: Date of Application, 21st Sept., 1889-Accepted, 2nd Nov., 1889
COMPLETE SPECIFICATION.
Improvements in Smoke-consuming Furnaces.
We, JOSEF INWALD, manufacturer, Prague, and JOHANN WANKA, Overseer of the
Imperial and Royal State-railroads, Smichow, both in the Empire of Austria, 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:-
The object of the present invention is to construct a smoko consuming furnace or
fire-place, by which the escape of smoke is more or less completely prevented, which
is to be attained by as far as practicable complete consumption of the fuel. There
are two ways of obtaining a smoke consuming fire-place: one must either enquire
directly into the origin and formation of the smoky kind of fuel to be burned or
endeavor to burn the smoke which issues from one part of the furnace in another part
thereof, before it enters the chimney. To construct a furnace embodying the last
named method is the object of the present invention. A furnace fitted to a steam
boiler and arranged and constructed according to this invention is represented in the
accompanying drawing.
Fig. 1 is a longitudinal vertical section.
Fig. 2 a section on the line X X of figure 1.
Fig. 3 is a horizontal section.
In the flue a is a pipe A usually of cast iron through which air (or it may be steam)
is driven by a blast forced through a copper or iron pipe B by means of a suitable
fan or blowing engine or the equivalent thereof, which fan or the like is situated_
near X. This air or steam or both mixes with the smoke and is driven with the latter
through the pipe A to the underside of the furnace grato R or straight into the
burning fire, where the smoke will be consumed. In the pipe B a cock V is fitted so
as to regulate or stop the air blast.
The inlet end of the pipe A is provided with a funnel-shaped mouth T and a
valve or damper K which turns on a hinge and which valve as soon as the smoke is
quite consumed is placed before the mouth or funnel T of the pipe A and gives the
smoke-gases free vent in the chimney, whilst the valve K when open as in figure 1 by
the smoke, being blown through the pipe A and afterwards consumed prevents the
escape of the smoke to the chimney. The valve K as shown in figures 2 and 3 is
actuated from the outside of the boiler setting by a small hand-wheel O, shaft S',
the bevel gear Z Z and the shaft S, which is fixed to the valve.
In furnaces, where more smoke is generated, than could possibly be consumed
immediately, the smoke may be conducted into a chamber or receiver with which
the pipe A communicates and from which the smoke is conducted to the underside
of the grate and then through the said grate into the furnace to be consumed. From
the pipe A the mixture of air and smoke is discharged to the underside of the grate
by the funnel-shaped nozzles r¹ r.
The before described arrangement can be applied to the furnaces of stationary
steam boilers, locomotives, and marine and other boilers; and if desired steam instead
of air could be blown through the pipe B into pipe A.
The outlet end of the pipe B is preferably provided with a flattened nozzle corre-
sponding in breadth to the mouth T of pipe A but having a smaller discharge opening
similar to the nozzle of a garden syringe.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is ;-
T
cine onneretus a nine such as A situated in the flue and whose

page_text: wido funnel-shaped mouth T receives the smoke issuing from the furnace mixed with
air or steam which is conducted to it at the same time by a separate pipe such as B
and which pipe A conducts it through the discharge pipe to the underside of the
grate where it will be consumed substantially as herein described and illustrated in
the accompanying drawings.
2. In smoke consuming apparatus a valve such as K to close the mouth T of the
pipe A which valve may be worked from the outside by a hand-wheel O, shaft S¹,
bevil gear Z Z and shaft S which in a lowered position interrupts the direct
communication between the furnace and flue a so that the smoke is obliged to pass
through the pipe A substantially as herein described and illustrated in the accompanying
drawings.
Dated this 21st day of September 1889.
W. P. THOMPSON & BOULT,
Agents for the Applicant.