and to Apparatus therefor and for similar Purposes.
Year: 1888

page_text: Date of Application, 28th Apr, 1888
Specification Accepted, 1st June, 1888
and to Apparatus therefor and for similar Purposes.
I, HOMER TAYLOR YARYAN of Toledo, Ohio, United States of America, Manu-
facturer 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:-
My invention relates to the purification of water in steam-boilers, and to apparatus
therefor and for other purposes.
The usual practice in working marine boilers is to furnish the boiler with a supply
of fresh water, and to condense the exhaust-steam from the engine by the use of a
surface-condenser, and then return the water of condensation to the boiler by means
of feed-pumps or otherwise.
As there is generally a continual waste from leakage and other causes, it is necessary
to occasionally supply the boiler with water from extraneous sources to make up for
such waste; this additional supply of water is provided for by the use of an apparatus
for distilling sea-water; or more frequently by carrying a supply of fresh water which
is used to make up for the loss from leakage or otherwise; or by pumping into the
boiler sufficient salt water to make up for the waste. In any case, the oil which is
used for lubricating the engine-cylinders is condensed with the steam in the
condenser, and a large portion of it is necessarily pumped into the boilers, where it
accumulates, and the boiler-water gradually becomes so contaminated with this oil as
to seriously injure the boiler. As a partial remedy for this defect, resort is made to
surface blow-offs, by which a portion of the oil is removed. The serious waste of
fresh or comparatively fresh water and the loss of sensible heat involved in this
process are, however, evils which render it a very incomplete and unsatisfactory
remedy.

page_text: Now my invention is designed to obviate the above-mentioned defects by purifying
the water in the boiler as hereinafter described, that is to say :-Instead of blowing off
the skum or impurities into the sea and thus wasting large quantities of fresh water
and sensible heat, I abstract the scum or impure water from the boiler, evaporate, it
and thus free it from the impurities and then condense the steam and return the
water of condensation to the boiler. For this purpose I use an evaporating apparatus
of sufficient capacity not only to furnish fresh water obtained by distilling sea-water
to. make up for the ordinary loss by leakage or otherwise, but to distil the water
contained in the boiler and extract the oil therefrom at sufficiently frequent intervals
to prevent the accumulation of oil therein to any injurious extent.
An important advantage of my method or process is that I am enabled to effect the
distillation without wasting the sensible heat contained in the water of the boilers, that
is to say, by connecting the boiler with the distilling apparatus I utilize the difference
of temperature resulting from the difference of pressure in the boiler and in the
evaporating apparatus, in which a partial vacuum is maintained, and the only loss of
sensible heat in my process is by conduction and radiation.
In carrying my said invention into practice I prefer to proceed as hereinafter
described, that is to say:-I provide for purifying the water in the boiler by permitting
the passage of the skum from the boiler into an evaporating chamber in which a
partial vacuum is maintained as above stated, so that, by reason of the difference
between the pressure in the boiler and that in the said chamber, the water will be
evaporated, whilst any oil or other impurities that may be mixed therewith will fall to
the bottom of the said chamber and can be drawn off either at intervals or continuously
through a suitable pipe. The steam from the evaporating chamber is conducted either
directly into the surface-condenser of the engine or into a separate surface-condenser
provided for the purpose, and is fed into the boiler in the form of fresh water.
The evaporating apparatus for purifying the water from the boiler may, when not
in use for this purpose, be used for distilling sea-water to make up for the loss from
In this case
leakage or other causes, or to be used for drinking and other purposes.
the evaporating chamber should be connected with a separate surface-condenser. or
provided with a drip-pipe.
In the accompanying drawing, I have shown a steam-boiler connected with
evaporating apparatus in accordance with my invention.
A is the boiler. B is an evaporating apparatus, which is preferably of the con-
struction described in the Specification of former Letters Patent dated November 3rd
A.D. 1886, No. 14,162.
a is a pipe connecting the boiler with the evaporating apparatus and provided with
a stop cock or valve a¹. This pipe is connected with the boiler below the water level
therein. is a pipe for conducting the steam from the evaporating apparatus to the
surface-condenser. c is a pipe for conducting undistilled oil or other impurities from
the evaporating apparatus to a pump C for discharging the same overboard or
otherwise disposing of them.
d is a pipe for the admission of sea-water into the distilling apparatus to be
converted into fresh water for feeding into the boiler or for drinking or other
purposes.
When the evaporating apparatus is to be used for distilling sea-water, the shell or
jacket thereof is connected by a pipe e with the valve-casing of the low-pressure
cylinder of the engine, or with other source of steam supply, and the cock or valve a¹
must be closed. The pipes d, e are provided with suitable stop cocks or valves d', e
A pipe is connected with the shell or jacket of the evaporating apparatus for
draining the water of condensation therefrom.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I wish it understood
that I claim :-
=:
First. The purification of water in a steam-boiler by abstracting the impure water
therefrom, distilling it and returning the distilled water thereto.

page_text: Second. The above described method of purifying the water in a steam-boiler by
blowing off the scum into an evaporating apparatus in which a partial vacuum is
maintained and which is connected with a condenser and provided with a drain-pipe
for the oil and other impurities, and returning the distilled water into the boiler,
substantially as described.
Third. The combination, with a steam-boiler, of an evaporating apparatus connected
with the said boiler below the water level and with a condenser (with or without
the connections for distilling sea-water), all substantially as, and for the purposes,
set forth.