A Combination Steam Boiler.
Year: 1896

page_text: Date of Application, 7th Mar., 1896-Accepted, 18th Apr., 1896
A Combination Steam Boiler.
We, GEORG GOEPEL, and JULIUS SCHEINHÜTTE, both of Merseburg, in the
Kingdom of Prussia and German Empire, Manufacturers, 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 steam boilers and consists in the combination cylindrical
shell of large water and steam'space with vertical tubes arranged at its side, so as;
to obtain large and easily accessible lieating and evaporating surfaces.
: A boiler constructed according to this invention occupies the least possible area,
which is of great importance in towns where the ground is dear.
In order that my invention may be the better understood, I now proceed to
describe the same, reference being had to the accompanying drawings and to the
letters and figures marked thereon. Like letters refer to like parts throughout
the drawings.
The furnace or furnaces are omitted in the accompanying drawings; they may
be constructed in any suitable form and according to the fuel to be used. The
large water and steam space shell is shown as an ordinary cylindrical shell but'any
other large space shell such as a Cornish boiler' may be used.
Figure 1 shows a vertical section through the cylindrical shell b, a view of the
rows of the evaporating tubes a'a, connected to it and arranged at its side, and a
sectional view of the horizontal connecting water caps e c; further the pipes' d' d
which lead the steam from the collecting caps d'of the evaporating tubes to the
cylindrical shell or steam chest b...
:
Figure 2 is a plan as seen from above; at the left are shown in horizontal section"
the boxes e e connecting a bundle or nest of tubes together; the water way; and the
water connection; and at the right the connection of the steam spaces of the tube
bundles or nests by the steam connecting caps c c', partly in horizontal section,
further the water circulating pipes d'd; which connect the upper cylindrical shell
with the tube. boxes e.
Figure 3 shows a vertical section through the boxes ee and the caps ce
connecting the same in the steam space.
Figure 4 shows these caps c c in horizontal section with the boxes e'e below
them one cap being removed.
Figure 5 shows the water connecting caps in elevation and also in vertical!
section.
Figure 6 shows the water connections c c of" one tube box e to another, as seen
from above; the first box' from the left being shown with the steam connecting.
caps removed, the second in horizontal section through the centre, and the third
in horizontal section below in the water connecting zone with connecting water
cape the preceding water cap is shown as seen from above.
The construction and action are as follows:-
This steam boiler, combined in a quite novel manner; consists of a cylindrical
shell or steam chest on one or both sides of which are arranged rows of bundles or
nests of tubes, in order to obtain a large heating surface, in such a manner that
the same water level prevails throughout the various parts of the boiler and that
a separate steam space remains in the cylindrical shell or steam chest as well as in
the tube-bundles arranged at the side. By this means a large reserve of steam is
obtained besides a sufficient stock of water; while, comparing the heating surface
:

page_text: obtained with that of ordinary cylindrical boilers, a small space is required in which
to erect this new combination boiler.
The process of evaporation is systematic; the feed water is introduced at the
coolest place of the upper cylindrical shell and distributes itself in the hot water;
the sludge and other impurities being deposited in the cylindrical or upper
chamber; the whole mass of water then passes through the circulating pipes dddd
and the water caps cc to and fro, through the connecting boxes e e of the tube
bundles over each separate row of tubes. Besides this, the well known vertical
circulation takes place in the separate tubes. In this way the steam bubbles have
ample opportunities to separate from the water in the easiest manner.
The strong
current which is required in the known circulating boilers, in order to obtain
certain quantities of steam, is not required in this improved boiler and great losses
are thereby avoided. In this boiler only a slight circulation is required to obtain
the largest quantities of steam per unit of heating surface.
Therefore and by means of the large evaporating surfaces, dry steam is obtained
when the boiler is pressed. As nearly all sludge and other impurities (in case
the water has not been purified) are deposited in the upper shell, the boiler tubes
will last a very long time. The tubes can be readily taken out or placed in
position, because the removal of the steam connecting caps c c renders them easily
accessible, and the said tubes are only hung by means of conical tubes in sunk
seatings.
As each tube has only one seating, in which it is freely suspended, each tube
can expand, without the tightness of the joint being affected, while as regards
tubes which are fixed at two ends it is known that the tightness of their joint is
affected, by expansion. A tube, cannot, therefore, become leaky in this boiler.
The steam is led from the hanging tubes to the cylindrical shell or steam chest
by a sufficient number of pipes d' d of suitable diameter, in such a manner that
the steam is led downwards into the steam chest by divided tubes, which reach
nearly to the level of the water, whereby a thorough separation of the water is
effected.
The boxes e e of the tube bundles a a, the water connecting caps cc of the same,
and the steam connecting caps c¹ c are carried out in forms corresponding to one
another, and any required amount of heating surface may be built up from these
elements; or any existing steam plant may be enlarged thereby to any desired
extent. Any existing steam boilers of insufficient heating surface may have their
capacity greatly increased by suitable addition of our tube elements.
. In conclusion it should be remarked that all joints and packings are easy of
access and can be renewed at any time, and that the joints, do not offer any
difficulties. The screws are all sunk head screws. It should also be pointed out
that boilers in which the upper vessel or steam chest is not heated, and which do
not contain in the connecting parts cross sections of more than 78 square
centimetres, interior measurement, may be put up in or below rooms inhabited by
people, according to the laws of most countries.
.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
1st. A combination steam boiler consisting of a cylindrical shell or steam chest b
connected to vertical tube bundles or nests a for the purpose of obtaining large and
easily accessible heating and evaporating surfaces.
2nd. A combination steam boiler as claimed in Claim 1 in which the tube
shaped outer walls of the upper boxes e e which are rectangular in their plan form,
are connected by ribs f with one another, so that each boiler tube is seated in a
cell by itself, the said ribs being perforated at f¹ and f2 so that water and
steam can circulate above the boiler tubes in the upper boxes.
: 3rd. A combination steam boiler as claimed in Claim 1 in which the separate
upper boxes e are jointed to form a connected space by means of hollow water

page_text: connections and steam caps c and c¹ respectively, connecting one upper box e to
the other, in such a manner that the steam may circulate freely over all upper
boxes, while the water circulates in a zig-zag way corresponding to the counter
current from the cylindrical shell 6 through all tube bundles a for which purpose
the level of water of the rows of tube bundles is the same as that of the water in
the cylindrical shell or steam chest.
Dated this 7th day of March 1896
FELL & JAMES,
Agents for the Applicants.