Improvements in Apparatus for Drying and Superheating Steam, Applicable also for Heating Water for Boiler Feed and other Purposes.
Year: 1897

page_text: Date of Application, 19th May, 1897-Accepted, 31st July, 1897
COMPLETE SPECIFICATION,
Improvements in Apparatus for Drying and Superheating Steam,
Applicable also for Heating Water for Boiler Feed and other
Purposes.
I, WOLDEMAR FEHRMANN, of Oberen Reihen No. 287 Moscow, in the Empire of
Russia, Manufacturer, do hereby declare the nature of my said 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 present invention consists of an apparatus for vaporising the water contained
in aqueous steam and super-heating the latter, and of the details hereinbefore
particularly described.
And in order to render the present specification more easily intelligible refer-
ence is had to the accompanying drawing in which similar letters denote similar
parts throughout the several views.
Fig. is a longitudinal section through one member of the apparatus, which
may consist of more than one member.
Fig. 2 is a section on line A-B of Figure 1,
Fig. 3 is a longitudinal section through an apparatus consisting of several
members, on line A-B of Figure 4,
Fig. 4 is a transverse section on the line C-D of Figure 3,
Fig. 5 is a detail plan of the pipe connecting piece for the various members and
Fig. 6 a transverse section 'showing a modified arrangement of the members.
The apparatus consists of one or more members and each member consists of two
tubes A and B arranged concentrically one within the other, the ends of the
annular space thus formed between the tubes being closed by annular rings or
plates C, C. Steam is introduced into the space between the tubes by means of
the inlet pipe D and conducted off by the outlet pipe D'. The apparatus may be
mounted in the smoke box or chimney of any ordinary furnace or steam boiler or
in the fire or smoke chamber or chimney of a furnace specially built to heat the
said apparatus, which will thus be heated exteriorly through pipe B by the
escaping gases of combustion. In order to increase the transmission of the heat
to the steam-which latter is a bad conductor of heat-and to distribute the steam
well round the space between the two tubes A and B, the latter is provided with a
series of corrugated rings arranged around the same in section as at Fand F¹,
the corrugations of one section or ring of corrugations F being displaced with
regard to those of the next section F1 Fig. 2. Baffle plates E and E¹ are arranged
respectively at the inlet and outlet tubes 1) and D' in order to prevent the steam
from passing direct from the inlet to the outlet without circulating round the
innor tube

page_text: The corrugated rings being by nature elastic, are suitably attached to the out-
side of the inner tube and will consequently, when the latter is pressed into the
outer tube close tightly onto or against the interior surface of the latter. Thus
the heat from the interior and exterior tubes will be conducted by the metal plates
or corrugated ring to the annular space between the pipes and be transmitted
to the steam. The exterior surface of the apparatus may be increased by ribs or
the like in order to increase the capability of the 'same for receiving and trans-
mitting heat.
As shown at Figs. 3 to 5 several of these apparatuses may be combined and
placed in the flue of a furnace or otherwise heated. In this case seven mem-
Eers A, B are employed, the five upper members, being of 'equal length and
arranged two above three, and the two lower members being somewhat longer, in
order to 'allow room for their upwardly extending inlet and outlet tubes to pass
the upper members. The inlet and outlet tubes to each member extend upwardly
through the brickwork of the flue and are each provided with a 'flange at its upper
end, said flanges being all connected to the main inlet D by means of a series of
branches 1 at one end and by a similar branch pipe system to the main outlet D'.
The advantages of this arrangement are that all the flanges, which generally cause
most trouble, are arranged outside the brick work and are consequently easily
accessible. As shown at these figures, instead of the corrugated rings, spirally
arranged, division plates may be arranged as at G, or a series of slantingly 'fixed
baffle plates H may be employed.
As shown at Fig. 6 two systems or series of members may be arranged one in
each side flue of a boiler furnace, the pipe connections to and from the same being
similarly arranged to those of Figure 3, with the exception that only four branches
are necessary to each connecting pipe. In this case the steam first passes from the
dome M of the boiler along pine N to the right hand series and then from the out-
let pipe of these to the inlet pipe of the left hand series and then out at 0. The
apparatus may be made of any suitable material such as iron, copper or the like
and the particular shape of the connecting pipes for the inlets and outlets of the
members would be governed by any particular circumstances.
The apparatus may also be employed as feed water heater, or as water heater for
hot water heating systems.
Having now particularly described and ascertained the nature of my said in-
vention and in what manner the same is to be performed, I declare that what I
claim is:-
1. The combination of an interior tube and an exterior tube, end plates to close
the annular space thus formed between the tubes, a series of baffle plates arranged
to contact with the interior walls of the exterior tubes and the exterior walls of
the interior tube, an inlet pipe at one end and an outlet pipe for the steam at the
other end of the exterior pipe and means for mounting the apparatus in the heat-
ing space of a boiler or furnace substantially as described.
2. The combination of a series of members each consisting of an exterior and
interior tube and plates to close the annular space between the tubes and inlet to
each tube at one end and an outlet to each tube at the opposite end, a series of
baffle plates arranged between the tubes and contacting with the adjacent surfaces
of the tubes as specified, a main inlet pipe having a series of branches to connect
each with an inlet of a member and main outlet having a series of branches to
connect the outlet pipes of the member and means for mounting the whole appa-
ratus within the flue or smoke chamber of a furnace, with the flanges outside the
same, substantially as described.
3. The combination of an exterior and an interior tube concentrically arranged,
plates to close the annular space between the two tubes, an inlet pipe at one end
and an outlet pipe at the other end of the exterior tube, a slantingly arranged baffle
plate within the space between the two tubes and across the inlet and outlet, a
series of corrugated rings arranged between the outlet and inlet, said rings fitting

page_text: tightly between and contacting with each of the adjacent walls of the tubes
alternately, substantially as described.
Dated this 18th day of May 1897
JOHNSONS,
115, St. Vincent Street, Glasgow, Applicant's Agents.