Improvements in Apparatus for Heating and Purifying Water for. Steam Boilers and for other purposes.
Year: 1890

page_text: Date of Application, 23rd Dec., 1890
Complete Specification Left, 23rd Oct., 1891-Accepted, 28th Nov., 1891
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Heating and Purifying Water for.
Steam Boilers and for other purposes.
I, DAVID STARK of No. 421 California Street, City and County of San
Francisco, State of California, United States of America, Engineer, do hereby
declare the nature of my invention for IMPROVEMENTS IN APPARATUS FOR
HEATING AND PURIFYING WATER FOR STEAM BOILERS AND FOR OTHER
PURPOSES to be as follows:-
This invention relates to apparatus for heating and purifying water to be fed to
steam boilers, as well as for other uses and purposes, and where a supply of water
at high temperature and free from sediment and impurities is required in the
arts and manufactures.
The nature of the said invention consists in certain novel construction and
combination of water-heating chamber adapted to utilize the heat from the
exhaust steam of an engine, comprising an upright cylindrical drum, a water-
heating coil in said chamber which is coupled outside to a supply pipe or feed-
water pipe, a filtering chamber beneath said exhaust-steam chamber into which the
water-heating coil delivers the heated water, said chamber containing a filtering
substance through which the heated water is caused to pass and a hot well or reservoir
beneath said filtering chamber having a delivery pipe to receive the heated and
purified water for distribution. Into the purifying chamber a live steam-coil is
placed in a space provided for it above the body of filtering material and steam
pipes connect the ends of the steam-coil with the steam and water-spaces of the
boilers to keep up a circulation of live steam. The object sought to be attained
by these improvements is, mainly, to secure an even or nearly uniform degree of
temperature in the water under varying conditions of work and especially in those
situations where the supply of exhaust steam for the heater is obtained inter-
mittently, as in some works and factories where the engine is run at irregular
intervals and is frequently shut down through the day. Whatever loss of heat is
occasioned by the interruptions in the circulation of exhaust steam through the
heating chamber of the apparatus is therefore replaced or the loss made good by
the heat which is supplied from the live steam through the live-steam coil in the
purifying chamber before mentioned.
My said improvements consist, also, in certain novel construction and combina-
tion of heating chamber and filtering chamber in which the absorption of heat
from the heated water arising from the expansion of the exhaust steam after its
action on the water is entirely overcome and prevented whereby a water-heating
and purifying apparatus is produced which is especially adapted for use with a
condensing engine. This feature of the present improvements comprise a novel.
construction and combination of upright exhaust steam drum or cylinder having
greater measurement diametrically than vertically, and superposed on a cylindrical
purifying chamber of smaller diameter and greater vertical height containing the
filtering material but not surrounded by the exhaust-steam and in combination
therewith the live-steam coil and connections before described located in a space
in the purifying chamber above the body of the purifying material.
Dated this 23rd day of December 1890.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, Agents for the Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements in Apparatus for Heating and Purifying Water for
Steam Boilers and for other purposes.
I, DAVID STARK of No. 421 California Street, City and County of San
Francisco, State of California, United States of America, Engineer, do hereby
declare the nature of my invention for IMPROVEMENTS IN APPARATUS FOR
HEATING AND PURIFYING WATER FOR STEAM BOILERS AND FOR OTHER
PURPOSES 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 water to be fed to
steam boilers and for other uses and purposes where a supply of water at high
temperature and free from sediment and impurities is required in the arts and
manufactures.
The nature of the said invention consists in certain construction and combination
of water-heating chamber in which the exhaust steam of an engine is utilized and
applied to heat a body of water, a filtering chamber beneath said heating chamber
containing a filtering substance or material through which the heated water is
caused to pass, and a hot-well, or reservoir, beneath said filtering chamber in which
is collected for use the purified water. Provision is made in the filtering chamber
for securing and maintaining a high degree of heat by introducing and causing to
circulate through it a body of live steam from the boiler by means of a steam-coil
and suitable connections. The object sought to be attained in and by these
improvements is mainly, to secure a uniform or nearly uniform degree of
temperature in the water under varying conditions of work and especially in those
situations where the supply of exhaust steam for the heater is furnished inter-
mittently as in some works and factories where the engine is run-at irregular
intervals or is frequently shut down during the day. By this means whatever loss
of heat is occasioned by the interruptions in the circulation of exhaust steam
through the heating-chamber the same is replaced by heat supplied from the live-
steam coil in the purifying chamber before mentioned.
My said improvements consist, also, in certain novel construction and combina-
tion of heating chamber and filtering chamber in which the absorption of heat
from the heated water by the expansion of the exhaust steam in the chamber is
overcome and is prevented from reducing the temperature to which the water
_has_already been raised, whereby a water-heating and purifying apparatus is
produced that is especially adapted for use with-a-condensing engine..
The following description explains the manner in which I proceed to construct
and carry out my said improvements, the accompanying drawings being referred to
by figures and letters :-
Figure 1 represents principally in vertical section my improved heating and
purifying apparatus constructed to work with a non-condensing engine :
Figure 2 represents a similar view of an apparatus constructed to work with a
condensing engine.
Similar letters of reference denote corresponding parts in both figures of the
drawings.
A, Figure 1, indicates a cylindrical shell or body with steam-tight joints, and
B an inner shell of similar form but somewhat smaller to obtain a clear space C all
around between the two shells.
An inlet D.in the top of the body A is connected with the exhaust-steam pipe
of an engine by the pipe Dx which may be the exhaust pipe of the engine, and an
outlet E with a pipe Ex is provided at the bottom. By this means the exhaust
steam is caused to pass through the space between the two shells and circulate
around the chamber formed by the inner shell.
G is a water-heating coil having one end carried out through the side of the
shell near the top, and the opposite end terminating in the chamber B*. This

page_text: coil is preferably made of copper, and the upper end is connected with the feed-
water pipe H. Filling the greater portion of the chamber B*, is a body of
filtering material I composed of cobble stones, coarse gravel or similar filtering
medium such as is commonly used in water-heating apparatus of this class and
resting on a perforated bottom-plate K that supports the same above a well or
reservoir B for the heated and purified water.
The shell of the chamber below. the line of the perforated partition is shaped
like a funnel and has an outlet L for the water in one side above the
bottom and a discharge M with a cock M* in the bottom for cleaning out the
receptacle. The outlet L is covered by an inclined apron N the office of which
is to cause such solid particles as may pass through the perforated plate from the
purifying chamber above to fall to the bottom of the space and thus prevent such
matter from passing out through the outlet L above.
P is a steam-coil set in the top part of the chamber B* in space provided for it
above the filtering material and having both ends carried through the shells A B
to the outside where connection is made with the steam-generating spaces of the
boiler and a circulation of steam is thereby maintained through the coil while the
boiler is at work. For this purpose one end of the coil is connected with
the water-space and the other end with the steam-space of the boiler.
The two shells are suitably staid and braced, and a safety valve is placed on
the outer chamber. The necessary stop-cocks are provided also for controlling
the supply of water, the circulation of live steam and the exhaust-steam, and the
blow-off or cleansing outlets.
There are openings, also, in. the body covered by plates A B through which
access is had to the purifying chamber for introducing the purifying medium and
for recharging the chamber with fresh material when necessary.
The apparatus as thus constructed is intended for use with a non-condensing
engine, and is especially adapted for use in situations where the engine is not run
constantly through the day, but is subject to interruptions whereby the exhaust
steam from the heating chamber is supplied irregularly. It is an improvement,
also, in such respect upon the apparatus for which Letters Patent of the United
Kingdom of Great Britain and Ireland were granted to me on the 11th day of
June 1888 (No. 8568) which apparatus for its proper and effective action depends
upon a continuous supply of exhaust steam in order to furnish purified water at
even temperature.
In constructing a heater and purifier of this class for special use with a
condensing engine I remove the surrounding shell and exhaust-steam space from
around the purifying chamber, (as illustrated in Figure 2 of the drawing) and
confine the exhaust steam to that portion of the body immediately around the
water-heating coil, thereby avoiding the cooling effect produced on the heated
water by the expansion of the exhaust-steam in the space around the filtering
chamber. The chamber Ax is connected with the engine-exhaust by the pipe D*
the same as in the first-described construction, and to the outlet. at E is connected
a pipe Exx leading to the condenser. A two-way cock S on the pipe Exx with
an outlet to the atmosphere allows the discharge to be diverted from the condenser
to the air when necessary.
This last described form of my improved apparatus is also well adapted for use
with engines of other classes, as the live-steam coil in the purifying chamber
enables the temperature of the water to be kept nearly constant and at such high
degree of heat that the separation and precipitation of the mineral matter and
other impurities contained in the feed-water are effectively and thoroughly
carried on.
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.-A water-heating and purifying annaratus consisting of a beating ohamhor

page_text: into which the exhaust steam from an engine is fearried, a water-heating coil in
said chamber which is attached for operation to a water-supply pipe at one end, a
heater and purifier beneath 'said exhaust-steam chamber composed of a chamber
containing a body of filtering inaterial, with a discharge for the water in the
bottom below the said filtering medium; a connection of the water-heating coil
with the upper part of said chamber above the filtering medium, a coil for
circulation of live steam arranged in said filtering chamber below said connection,
and a well or reservoir for the heated and purified water beneath the filtering
chamber having a draw-off outlet for the water, arranged for operation substan-
tially as hereinbefore described and shown in the drawing.
2. A water-heater and purifier adapted to utilize the heat derived from the
exhaust-steam of an engine, and comprising a chamber or compartment to be
connected with the exhaust of the engine, and a water-heating coil in said chamber
connected with a water-supply outside, in combination with a filtering chamber.
containing a filtering medium and having a space above said filtering medium'
containing a live-steam coil and having the end of the said water-heating
coil above arranged to discharge into it, and a well, reservoir or space beneath
said filtering chamber adapted to receive the water as it passes through the
filtering medium and having a discharge aperture on the side and an inclined plate
or apron over said aperture, for operation as herein before described and shown in
the drawing.
Dated thi h
1001
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, Agents for the Applicant.