Improvements in Apparatus for Utilizing and Obtaining Useful Products from the Waste Gases from the Flues of Steam Boilers and from similar Sources.
Year: 1890

page_text: COMPLETE
SPECIFICATION.
Improvements in Apparatus for Utilizing and Obtaining Useful
Products from the Waste Gases from the Flues of Steam Boilers
and from similar Sources.
I, JOHANN SCHMITZ of Scheuburg near Rheydt in the Kingdom of Prussia, and
German Empire, Manager, 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 apparatus for utilizing the waste hot gases from steam
boilers and other similar sources, which gases have hitherto generally been allowed
to escape freely by a chimney.
These Improvements consist in the construction and arrangement of apparatus for
the utilization by suitable means of the waste hot gases for the purposes; First, of
heating the factory rooms during cold weather; Second, of drying or heating any
materials which may be required to be so treated; and Third, of separating for
subsequent utilization, the substances which may be mechanically suspended in or
combined with the hot gases.
I will proceed to particularly describe these Improvements with reference to the
accompanying drawings in which Fig. 1 is a longitudinal section of the apparatus;
Fig. 2 is a vertical section of the upper portion of the purifying chamber; and
Fig. 3 (A) a horizontal and (B) a vertical section of the cover plate of the collecting
and purifying chamber with the regulating mechanism.
The gases from the furnace A are led in the ordinary manner to the flue B leading
to the chimney whence they usually escape.
According to these Improvements I arrange above the fluo B a purifying
chamber into which the hot gases enter through the opening o. In this chamber
several bafe plates are constructed or fixed and above it there is a fan or blower G
which draws the gases from the flue B through the spaces o¹ to o³, where in
consequence of the varied velocity of the gases, the soot and other suspended matters
are deposited.
To render the gases capable of being used safely in heating and drying apparatus,
they are mixed in and by the fan or blower G with a supply of cold air drawn in
through the passage K. The mixture of cold air and waste gases is then driven
through the openings o into the collecting box S (Fig. 2) from whence it may be
led to be utilized in the heating or drying apparatus.
The channel or passage K through which the cold or external air is admitted is
so constructed and arranged that the bearings of the fan or blower G are all included
therein and therefore surrounded by the cool air.
For the purpose of maintaining the air in the collecting box S and in the
heating passages or tubes uniformly within such a range of temperature as to
prevent all danger of the ignition of particles of soot or dust therein or in the
heating apparatus, an apparatus is connected to the collecting box S consisting of the
cylinder V the piston w, the lever and connecting rods or links and a damper z.
The variations of the temperature of the air surrounding the cylinder V will as is
well understood, cause expansion and contraction of the air contained in the cylinder
The
below the piston and consequently cause the piston to ascend or descend.
motion of the piston is communicated to the damper which controls the inlet of
the hot gases in such a manner that when the temperature of the gases in the apparatus
rises, the damper is closed to such an extent as to reduce the inflow of the hot
gases. On the contrary, when the temperature in the apparatus sinks, the damper
is opened further, in order to admit a greater supply of the gases.
By means of the apparatus constructed and operated as hereinbefore described, the
waste gases from a boiler furnace or other suitable source may be utilized for heating

page_text: purposes without reducing the supply of the air required for combustion which
result would follow upon the cooling of the air before it arrived at the chimney in
the ordinary manner. The smoke nuisance is abated by the deposition of the
suspended soot and similar matters in the chambers; and finally, the admixture of
cold air with the hot gases before passing them to the heating or drying devices
prevents the possibility of ignition within the apparatus.
Having now particularly described and ascertained the nature of my said Inven-
tion and in what manner the same is to be performed, I declare that what I
claim is,-
sources;
(1) In apparatus for utilizing the hot waste gases from boiler flues and other
the combination and arrangement of a smoke chamber in which the
velocity of the gases is varied, and a fan or blower for drawing the gases into the
apparatus and mixing them with cold air, substantially as and for the purposes
herein before described and as illustrated by the accompanying drawings.
(2) In an apparatus for utilizing the hot waste gases from boiler flues and other
sources and in which cool air is mixed with the hot gases, devices for controlling
and regulating the temperature of the mixed gases and air, said devices consisting of
a cylinder a piston and a damper with suitable rods and levers connecting the
piston with the damper, constructed and operated substantially as and for the purpose
herein before described, and as illustrated by the accompanying drawings.
Dated this 96th dow of March A IN
1800
WILLIAM E. HEYS,
Agent for the Applicant.