A New Method of Applying Soda to Internal Parts of Boilers for Preventing the Formation of Scale.
Year: 1891

page_text: Date of Application, 22nd Aug., 1891
Complete Specification Left, 30th Mar.. 1892-Accepted, 30th Apr., 1892
PROVISIONAL SPECIFICATION.
A New Method of Applying Soda to Internal Parts of Boilers for
Preventing the Formation of Scale.
I, JAMES TOBIN of 20 Harmood Street, Chalk Farm Road in the County of
Middlesex, Mechanic, do hereby declare the nature of this invention to be as
follows:-
==
My invention relates to a new method of applying soda to internal parts of
boilers to prevent incrustation by deposit of mineral substances contained in the
water admitted for evaporation.
Hitherto it has been usual to put into the water after filling a boiler, a certain
quantity of soda to be dissolved in the water to be evaporated, the soda being used
with a view to prevent incrustation of the mineral substances deposited during the
evaporation of the water. According to my invention the soda is not put into the
water after filling the boiler but is placed upon those parts directly acted upon by
the flames or heat from the furnace, after damping the same and before filling the
boiler. For example in the case of a Galloway boiler, the flue tubes being
moistened the soda in small crystals is placed along the upper part of the flue tubes
and then the boiler is filled in the usual way and the deposit which takes place as
the evaporation proceeds does not produce a scale but accumulates in the form of a
non adherent powder in the lower part of the boiler from which it can be readily
removed.
Dated this 22nd day of August 1891.
AYRTON & THOMAS,
Agents for the Applicant.
COMPLETE SPECIFICATION.
A New Method of Applying Soda to Internal Parts of Boilers for
Preventing the Formation of Scale.
I JAMES TOBIN late of 20 Harmood Street, Chalk Farm Road in the County of
Middlesex but now of 20 Radnor Terrace, Wandsworth Road in the County of
Surrey, Mechanic 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 a new method of apylying soda to internal parts of
boilers to prevent incrustation by deposit of mineral substances contained in the
water admitted for evaporation.
Hitherto it has been usual to put into the water after filling a boiler, a certain
quantity of soda to be dissolved in the water to be evaporated, the soda being used
for the purpose of preventing incrustation of the mineral substances deposited
during the evaporation of the water.
According to my invention the soda is not put into the water after filling the
boiler but is placed upon those parts directly acted upon by the flames or heat from
the furnace after damping the same and before filling the boiler. For example in
the case of a Galloway boiler, the flue tubes being moistened, the soda in small
crystals is placed along the upper part of the flue tubes and then the boiler is filled
in the usual way and the deposit which takes place as the evaporation proceeds
does not produce a scale but accumulates in the form of a non adherent powder in
the lower part of the boiler from which it can be readily removed.
In the case of boilers having vertical flue tubes I apply the soda in the form of
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page_text: a strong solution applied by means of a brush in order to obtain the same result as
by laying the soda upon the tubes after damping the latter.
In describing my invention I have used the word soda as a general term intended
to include all alkaline matters generally used in solution in water to be evaporated
in boilers to prevent or minimise incrustation of the mineral deposits which occur
through evaporation. I am aware that soda and other alkaline matter have been
used in solution in water to be evaporated in boilers as a preventative against the
formation of adhesive scale in the boiler and I do not therefore claim the use of
soda or other alkaline matter for that purpose but
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 :-
The method of applying alkaline matter in direct contact with internal parts of
boilers for preventing incrustation of the deposits formed by the release of mineral
substances during the evaporation of water substantially as described.
Dated this 24th day of March 1892.
AYRTON & THOMAS,
Agents for the Applicant.