Improved Apparatus for Protecting and Supplying Steam to Furnace Grates..
Year: 1899

page_text: Date of Application, 9th Jan., 1899-Accepted, 18th Mar., 1899
COMPLETE SPECIFICATION.
Improved Apparatus for Protecting and Supplying Steam to Furnace
Grates..
We, FRIEDRICH WEBER, Junior, of 225, Friedrichs Strasse, Berlin, Engineer,
and WILHELM BORCHERT, of No. 3, Friedrichsfelder Strasse, Berlin, Artisan, all
in the German Empire, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement:→
The object of the present invention is an arrangement of tubes with outlet
openings devised to be placed under the grate of furnaces for the purpose of pre-
venting the formation of clinkers, and the burning of the grate bars.
Further, this arrangement is designed to secure a rational combustion of the
fuel, and consequently to produce a firing as free from smoke as possible.
The great demands which, in the case of highly forced combustion, are made
upon the resisting power of the grate to heat, have not been hitherto satisfactorily
met. In many cases the grate bars bend and gradually burn away. The constant
renewal of the bars at relatively very short periods increases the cost of the firing
to a high degree. To remedy this drawback, and to attain other advantages
hereinafter set forth, is the object of the present invention.
The apparatus designed for the purpose consists of a main tube A to which a
number of tubes corresponding to the requirements of the grate, each of about
10 millimeters diameter, are attached perpendicular to the main tube. The
separate tubes a are connected one with another through the tube A, and are pro-
vided at their surface with small apertures at suitable distances.
The application of the apparatus is preferably immediately beneath the grate,
and as far as possible, so that the tubes a can run parallel to the grate bars, with
the perforated side uppermost.
The apparatus is set in action by introducing steam into the main tube A by
means of a connecting pipe from the boiler or other source.
The steam passes
into the tubes a, and finally escapes through the small openings therein. The
outlets of the steam are directed against the grate bars, which are thereby cooled
and the constant moist condition whereof prevents any attachment of clinker.
The steam passing in to the fire is decomposed in the combustion space into
oxygen and hydrogen, whereby on the one hand an effective combustion of the fuel
is caused, and on the other hand any formation of bitumen, which occasions dis-
agreeable smoke, is prevented. Further, the advantage of a rapid and effective
cleansing of the fire place is hereby attained.
The ends of the tubes a connected to the main tube A are open, so that the
steam can flow into them. The other end of each tube is closed by means of the
plug, and the wing nuts s, so that in this direction no steam can escape; but if
the nuts s are released, then the bar S will move backwards under the influence
of the spiral spring f. The plug then escapes from the tube a, and this latter
is open. If now steam be passed into the said tubes a for the purpose of cleansing,
the same will pass partly through the outlet openings, and partly through the

page_text: open ends of the said tubes a, and in this manner the dust or rubbish present will
be removed in a few minutes.
When this purpose has been attained the nuts s are again screwed up causing
the plug to again plug tubes a, and close them tightly, so that the steam can
again only escape through the outlet openings.
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:-
-
1. Improved protective device for furnace grates against burning of the bars,
and adhesion of clinker, consisting of a steam tubular system, provided with
outlet openings, which tubular system is arranged parallel to the grate bars, and
keeps them moist and cool by means of steam passed through the tubes a, whereby
at the same time almost smokeless firing and a rational utilization of the fuel are
attained.
2. The improved apparatus for cooling grate bars, preventing adhesion of
clinkers, and promoting combustion in the furnace, constructing and operating
substantially as described, and shewn in the accompanying drawing.
་་..} 1030
W. P. THOMPSON & Co.,
322, High Holborn, London, W.C., Patent Agents for the Applicant.