An Improved Feed-water Heater for Steam Boilers,
Year: 1899

page_text: Date of Application, 11th July, 1899-Accepted, 4th Nov., 1899
COMPLETE SPECIFICATION.
An Improved Feed-water Heater for Steam Boilers,
I, PAUL BREDT, Junior, of 84 Herderstrasse, Dusseldorf, in the Province of
the Rhine, in the Kingdom of Prussia, German Empire, Merchant, do hereby
declare the nature of this invention and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement:
-
My invention relates to an improved device for heating the feed water of
steam boilers by the utilization of the otherwise waste steam exhausted after use,
the particular construction and arrangement of same being shewn in the accom-
panying drawings of which Figs. 1 and 2 are vertical sections taken upon the
lines A B and E F respectively of Fig. 3, Figs. 3 and 4 being horizontal
sections taken upon the lines CD and G H respectively of Fig. 2.
My invention consists of a metallic base A, upon which is mounted a prefer-
ably cylindrical case B, enclosing a second and like but smaller case Û, the
upper ends of B and C being enclosed by a removable but steam tight lid or
cover D.
3.and
Within the casing B are any number (preferably four) metallic or other tube
EEEE³, placed in any suitable position, but preferably such, that the
axial centres of these occupy the positions of the four corners of a square figure,
the outer surfaces of the said tubes being provided with any number of annular
extensions, rings, or louvres a or a spiral projecting surface in lieu of these,
their object being to incréase the heating area upon the outside of the said
tubes. The lower and reduced ends of the said tubes are bolted or otherwise
fixed to the base A, their hollow interiors being, by the means of passages b
in communication with a circular or other shaped chamber I formed in the said
base. The upper and reduced ends of the said tubes are bolted or otherwise
connected to a circular metallic casing G, divided into two distinct chambers H
and H by the means of an inner wall G¹, and partitions J and J', the said
casing being arranged to provide the same number of water tanks as there are
tubes below, presumably four, two of the said tanks K and K¹ being in the
chamber H and in connection with a water supply conduit c, while the other
two L and L are in the chamber H¹ and are connected to an exhaust pipe d
leading to the feed of the boiler, the said tanks being arranged in such positions
that their lower ends coincide and communicate with the upper ends of the
tubes E E E and E³. The upper ends of the said water tanks are closed by
a preferably steam tight cover M, having a central aperture e, opening into
the chamber formed by the wall G¹, while in the lower end of this chamber
is an aperture f opening into the casing B in the centre of the space between
the tubes E E E2 and E³.
In each of the said tubes is placed a rod N, having upon its lower end a disc g
in which a water passage g₁ is formed and which normally rests upon the
shoulder formed by the narrowed way in the lower end of its respective tube,
the upper end of each of the said rods being provided with a hand hold h, by
means of which the said rods or any one of these may be raised and withdrawn

page_text: for cleaning purposes when the cover D is removed. In suitable positions upon
the upper and lower ends of the said rods is mounted any number (preferably
four) discs or plates P, each convex upon its upper surface, these being (like the
chamber F) for the collection of calcareous deposits of the feed water, which said
deposits, in so far as relates to the said discs, may be removed by raising the
rods L, while, as relates to the chamber F, this is arranged for emptying and
washing or otherwise cleaning out by the means of a pipe or pipes R (Fig. 4).
A passage S is formed in the base A which passes through a portion of the
chamber F, and leads into a chamber T in the centre of and formed by the
chamber and opening into the case B, and through the said passages in the
direction of the arrow would pass the exhaust steam after use, which entering
the chamber T would pass up into the casing B and flow around the tubes
E E E and E³, as indicated by the curved arrows, and so convey its heat to
them, the said steam eventually passing up through the apertures f and e into
the cover D, thus heating the water tanks K, K, L and L, from whence
it passes (as indicated by the arrows) out into the cover D), and down between
the cases B and C into a chamber in the base A, and exhausts through an
aperture m, thus in its course also heating the casing B and the base A.
The feed water would enter through the cock-governed water conduit c into
the tanks K and K', and would flow from these into the tubes E and E' into the
chamber F and rise in the tubes E2 and 3 into the tanks Land L¹,-and-flow
from these through the feed water injector or other conduit d, the said feed water
thus becoming heated by first passing through the heated passages -K. K', E E¹
F, E E3, L and L to the boiler.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that 'what
I claim is―
(1) The compound feed-water heater for steam boilers, substantially as herein
described and shewn.
(2) The improved feed water heater for steam boilers consisting of the com-
bination of a base A, supporting casings B and C, surmounted by a cover D,
the said casing B enclosing tubes such as E E E and E³, the lower ends of
which communicate with a chamber F in the said base, while their upper ends
communicate with a water tanks K, K, L and L' in a chamber G, the said
tanks K K being connected to a water supply at C and the said tanks L L'
with the boiler feed conduit such as d, the said tubes tanks and base becoming
heated by exhaust steam entering at S in the chamber F, passing through
the casing B around the tubes E E¹, E and E3 and the tanks K. K L and L'
and between the casings B and C into a chamber V and out at m substantially
as herein described and shewn by the appended drawings.
Dated this 11th day
1000
4
GEO. THOS. HYDE,
1, Broad Street Buildings, Liverpool Street, London, E.C.,
Agent for the Applicant.