Improvements in the Means of Separating the Incrustation from Boiler Plates.
Year: 1889

page_text: Date of Application, 27th Sent., 1889
Complete Specification Left, 7th June, 1890-Accepted, 12th July, 1890
PROVISIONAL SPECIFICATION.
Improvements in the Means of Separating the Incrustation from
Boiler Plates.
I, ROBERT GOODBODY, of Upton, Clara, King's County, Ireland, Jute Spinner, do
hereby declare the nature of this invention to be as follows:-
This invention relates to the separation of incrustation deposited on the plates of
boilers by most waters when converted into steam.
The incrustation so deposited is usually of a hard stony nature, not only difficult to
remove when the boiler is off for cleaning, but during the time the boiler is in use it
hinders the transmission of heat from the fire to the water.
Many patents have been taken out for discoveries made in the means of removing
the scale or preventing its accumulation, the latter is most difficult and even doubtful
of attainment.
It is however very desirable for many reasons, that some means should be adopted
by which to some extent the incrustation could be prevented from accumulating to
such a thickness as hitherto with certain waters, and to facilitate the removal of such
deposit when the boiler is off for cleaning.
By experimenting I have discovered that, if a small quantity of a certain material
or combination of materials hereinafter described, be mixed with the water used in a
boiler, the deposit of mineral matter is changed in its character from being hard and
stony and strongly adhering to the plates, to a soft deposit with little adhesion to the
plates.
The material or combination before referred to is a so called hydrocarbon, which
may be either the natural products or the residuum of the distillation of natural
hydrocarbons, or the product of the distillation of schists or minerals yielding hydro-
carbon oils.
The material or combination must be of such a nature, that it is not perceptibly
volatilised, or volatilised in very small quantity only, and its specific gravity should be
at 60 degrees Fahrenheit from 898 to 902 or thereabouts, water being taken at 1000:
its boiling point should not be less than 500 degrees Fahrenheit, and at ordinary
temperatures should have considerable viscosity or thickness, such as thick paint or
syrup, as for example treacle.
The method of applying the above, is to inject it along with the feed water into the
boiler by an ordinary feed pump or special injecting device, in quantity proportionate
to the lime salts or other impurities contained in the water employed.
Dated this 21st day of September 1889.
JOHN WAUGH,
Agent.
COMPLETE SPECIFICATION.
Improvements in the Means of Separating the Incrustation from
Boiler Plates.
I, ROBERT GOODBODY, of Upton, Clara, King's County, Ireland, Jute Spinner, 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 the separation of incrustation deposited on the plates of
boilers by most water when converted into steam.
The incrustation so deposited is usually of a hard stony nature, not only difficult to
ID 77

page_text: remove when the boiler is off for cleaning, but during the time the boiler is in use it
hinders the transmission of heat from the fire to the water.
Many patents have been taken out for discoveries made in the means of removing
the scale or preventing its accumulation, the latter is most difficult and even doubtful
of attainment.
It is however very desirable for many reasons, that some means should be adopted
by which to some extent the incrustation could be prevented from accumulating to
such a thickness as hitherto with certain waters, and to facilitate the removal of such
deposit when the boiler is off for cleaning.
By experimenting I have discovered that, if a small quantity of a certain material
or combination of materials hereinafter described, be mixed with the water used in a
boiler, the deposit of mineral matter is changed in its character from being hard and
stony and strongly adhering to the plates, to a soft deposit with little adhesion to the
plates.
The material or combination above referred to is a so called hydrocarbon, which may
be either the natural products or the residuam of the distillation of natural hydro-
carbons, or the product of the distillation of schists or minerals yielding hydrocarbon
oils.
In order that any of these bodies should be suitable for the purpose of the objects of
this invention, viz. the prevention of injurious incrustation and the removal of the
deposit with greater case than hitherto, it should have the following qualities-its
specific gravity should be at 60 degrees Fahrenheit about 900, water for comparison
being taken at 1000 and have a boiling point of about 500 degrees Fahrenheit.
The hydrocarbon must be of such a nature, that it is not perceptibly volatilised, or
volatilised in very small quantity only, when it is heated in contact with boiling water,
even if the water be at a temperature much higher than 212 degrees Fahrenheit, as
would be the case in a boiler working at a pressure of 100 lbs. to the square inch. It
is necessary that the hydrocarbon for the object of this invention should have at
ordinary temperatures considerable viscosity or thickness, like paint or treacle.
The method of applying the above, is to inject it along with the feed water into the
boiler by any ordinary feed pump or special injecting device, in quantity proportionate
to the lime salts, or other impurities contained in the water employed: regard also
being had to the size of the boiler.
It is well known to engineers, hitherto substances of an oily nature have had a
tendency to prevent the accumulation of injurious deposit on the plates of boilers, but
all have come to the conclusion by practical experience, that the substances used of
this nature have by combining with the lime salts formed a powder upon the plates
more objectionable than the incrustation itself; inasmuch as the powder so formed
settling on the plates, absolutely prevents the heat passing from the fire to the water,
and many serious accidents to life, limb and property have been the result.
Now by the use of the within named mineral composition, no such disastrous results
follow, on the contrary fine particles of the composition deposit on the plates through
the difficulty of volatilizing and thereby preserve the plates from pitting, a very
common occurrence, not only this, but the deposit is not of so stony a nature and is
easier removed; thus rendering the boiler more efficient, and saving time and labour
in the frequent cleaning out of the boiler.
Having now particularly described and ascertained the nature of my inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
The use of such hydrocarbon bodies as above described injected into boilers along
with the feed water for the purpose of preventing the formation of hard stony deposit
on the boiler plates.
T11: 4th Jan Ր T1000
JOHN WAUGH,
Agent