Apparatus for Heating and Purifying Feed Water for Boilers.
Year: 1897

page_text: Date of Application, 30th Mar., 1897-Accepted, 12th June, 1897
COMPLETE SPECIFICATION.
Apparatus for Heating and Purifying Feed Water for Boilers.
I HERMANN PAUCKSCH of Fernemühlen-strasse Landsberg on the Warthe, in
the German Empire, Manufacturing 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 relates to apparatus for heating and purifying the feed water for
steam boilers, and consists in apparatus in which a horizontal or approximately
horizontal system of tubes, arranged in the first fire flue, is combined with an
upright system in any suitable manner. The feed water passes through these
systems, the cold water being admitted at the lowest part of the upright system.
Thence the water rises in the several tubes of the upright system, whereby it
cominences to become heated and the coarser particles of the sludgo are precipitated.
The water passes then into the horizontal or approximately horizontal system of
tubes which consists suitably of one or more Field's tubes. Here the water is
caused to enter at the back, passes to the front through the inner tube, returns
back through the whole length of the outer tube, and passes to the boiler.
In this
manner the water is strongly heated, so that the fine particles of sludge become
separated and the water enters the boiler approximately at the temperature of the
boiler water.
In order that this 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.
Figure 1 shows a longitudinal section and Figure 2 shews a transverse section on
the line y Fig. 1.
a is the first fire flue in which a Field tube has been arranged below in the steam
boiler. The Field tube consists of an inuer tube and an onter tube i and is
connected by means of the tube g with the system of tubes described hereafter.
As shewn in Figure 2 this system is formed of a number of upright tubes & their
lower ends being connected to a cylindrical vessel b, their upper ends to the
vessel. The vessel b is provided at the right and left with pivots p resting in
bearings g. The cylinder & is fed with feed water by the tube in the direction
of the arrow, is an orifice to allow of the cleaning of the vessel b, and e is an
orifice through which the sludge and other impurities may be drawn off during the
working of the boiler. When the rear system of tubes is to be freed from
incrustation, the closing devices of the vessel f, must be removed, and after
loosening the connection between the tube g and the vesself the whole system may
be rotated around the axis of the pivots p and lowered in order to facilitate the
cleaning of the tubes.
The Field tube or tubes are provided at their frout closing plates o with exit
devices through which the sludge collected in the tube i may be drawn off.
When it is desired to thoroughly clean the tube, the back and front plates no of
the tube are removed to allow of the easy withdrawal of the inner tube h.
The action of the whole apparatus is as follows:-.
The water enters through the service pipe c as evenly and continuously as possible
into the vessel b, commences here to become heated, and rises in the tubes d.
During this passage the coarse sludge is precipitated and the water which rises in
temperature, passes through the vesself. in the direction of the arrow, into the interior

page_text: of the tube, passes forwards therein and returns through the tube i, as also shown
by the arrow. From the tube i the water passes through the tube into the
boiler /.
The Field tube is preferably arranged inclined towards the front as shown in the
drawings, so that the sludge can collect towards the front and be drawn off through
the exit device m during the working of the boiler.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1st. Apparatus for heating and purifying the feed water for steam boilers
consisting of an horizontal or approximately horizontal system of tubes arranged in
the first fire flue of the boiler in combination with an upright system in the rear
part of this fire flue, the water being continuously introduced first into the upright
system, when it becomes slowly warmed, and the coarse sludge precipitated, and then
fed into the horizontal or approximately horizontal system in which being exposed
to the hottest gases of combustion the feed water becomes further strongly heated
so that the fine particles of sludge are separated therefrom.
2nd. A form of construction of the apparatus clained in Claim 1 in which the
upright system of tubes is formed of tubes d arranged between two vessels b and f
of which the lower b serves specially for the reception of the precipitated sludge,
the approximately horizontal system: consisting of one or more Field tubes, in which
the water passes forwards first through the inner tube hand then backwards
through the outer tube i and thence through the tube & into the boiler.
3rd. The construction of the apparatus described in Claims 1 and 2, in which
the vessel b rests on pivots p supported in bearings q, so that the whole system may
be lowered by rotation in order to allow of the easy cleaning of the tubes d;
substantially as described.
Dated this 30th day of March 1897
FELL & JAMES,
Agents for the Applicant.