Improvements in Steam Boilers.
Year: 1896

page_text: Date of Application, 10th Oct., 1896
Complete Specification Left, 7th Apr., 1897-Accepted, 8th May, 1897
Improvements in Steam Boilers.
I, SIMON SCHULZ of Pancsova in Hungary Seagoing Engineer do hereby
declare the nature of this invention to be as follows:-
This invention refers to return tube steam boilers for marine and other purposes
whereby the economic efficiency is considerably increased so that about 15% of
fuel is saved. According to this invention I provide in the combustion chamber
or back uptake between the tubes thin plates of fireproof material, which plates
are fixed to the back tube plate. The fire gases have to pass between these plates
in order to enter the tubes, and the plates are consequently rendered white hot and
ignite or reheat the smoky gases, so that they are rendered heat producing and
cause the saving in fuel.
The plates may be provided with lateral lugs for hanging on short tubular
socket pieces driven into the tube ends. These socket pieces have outer flange
parts for holding the plates in place. The calorimeter or total area through the
tubes is thus decreased to a very small extent only and no damage is done to the
boiler.
The plates which may be of kaolin, fireproof clay graphite, asbestos or the like
may be moulded with inlaid wire for the purpose of holding the plates together
even if they should crack by the heat.
JENSEN & SON,
77 Chancery Lane, London, W.C., Patent Agents.
I, SIMON SCHULZ, of Pancscova in Hungary, Seagoing Engineer, 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 refers to return tube steam boilers for marine and other purposes
whereby the economic efficiency is considerably increased, so that about 15% of
fuel is or may be saved.
According to this invention I provide in the combustion chamber or back uptake
between the tubes thin plates or slabs of fireproof material which plates are fixed
to the back tube plate. The fire gases have to pass between these plates in order
to enter the tubes and the plates are consequently rendered white hot and ignite or
reheat the smoky gases, so that they are rendered heat producing and cause the
saving in fuel.
Fig. 1 is as an example a vertical cross section through one half of the back
uptake of a marine boiler with two furnaces; Fig. 2 is a longitudinal section, and
Figs. 3, 4 and 5 are detail views.

page_text: Between the tube rows are provided plates or slabs a of fireproof material, in
this case provided with lateral lugs b for hanging on short tubular socket pieces c
driven into the tube ends of one of the upper tube rows as shewn clearly in Figs. 3
and 4. These socket pieces have outer flange parts d for holding the slabs a in
place. The calorimeter or total area through the tubes is thus decreased to a very
small extent only and no damage is done to the boiler. The plates a which may be
of kaolin, fireproof clay, graphite, asbestos or the like may be moulded with inlaid
wire for the purpose of holding the plates together even if they should crack by
the heat. The invention is easily applied to existing boilers.
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 :-
1. The application and use in the back uptake of return tube steam boilers and
especially in marine boilers of a series of thin vertical slabs or plates of fireproof
material arranged between the rows of tubes and which become white hot and thus
are able to give off heat to or ignite combustible gases which may be in a smoky
condition substantially as set forth.
2. The means for supporting the plates a as described and shewn.
JENSEN & SON,
77 Chancery Lane, London, W.C., Patent Agents.