An Improved Compound for Preventing and Removing Incrustation in Steam Boilers.
Year: 1890

page_text: Date 01 Application, 15th Nov., 1890-Accepted 20th
1000
Date of Application, 15th Nov., 1890-Accented 20th 100%
Дост
COMI DETE SPECIFICATION.
An Improved Compound for Preventing and Removing Incrustation
in Steam Boilers.
JAMES LUVIAN WADE Manufacturing Chemist 307 Burdett Road Limehouse
London E. 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 :-
The production of an improved compound having for its object the prevention of
incrustation in steam boilers and the removal by disintegration of incrustation already
formed therein. The compound
receiver the following ingredients vizt. caustic potash esparto grass & water. These
prepared by treating in a boiler or other suitable
are boiled until the grass is reduced to a pulp when there is added thereto sumac
finely powdered containing tannic acid. After the addition of this ingredient the
mixture is further boiled until the whole is converted into a homogeneons mass.
While in this condition there are added the following substances each in solution
carbonate of potash chloride of potash silicate of soda Irish moss and lastly creosote
& green mineral oils. These being added the mixture is converted into a pasty mass
which upon cooling may either solidify & be cut into squares or bricks, or as herein-
after set forth may remain in a fluid or semi fluid condition. The quantities of the
various ingredients above enumerated are varied according to the quantity & nature
of the scale forming impurities present in the water in which the compound is to be
used & in boilers where crust is already formed the thickness of same is taken into
account when fixing the proportions of the ingredients. This variation of quantities
is necessarily almost unlimited as will be understood from the great differences in the
proportions of crust forming salts found in the water of different localities and the
proportions of the compound are determined from a careful analysis which I make of
the water in each case. In many instances therefore the variation of the composition
is such as to result in the formation of a compound which upon cooling does not
solidify as before set forth but remains in a fluid or semi fluid condition.
In whatever state, the solubility of the compound in hot or cold water renders it
easy of application and it may either be introduced to the boiler through the manhole
n such quantity as is required for a given time or it may be added occasionally in
mall quantities through the feed water tank or by means of an injection feed upon
he top of the boiler. When introduced into the boiler the compound becomes
iffused throughout the water and combining mechanically with the earthy matters
eld in suspension therein its constituents react upon the calcareous ingredients
esulting in a chemical interchange & the production of a soft plastic mass. Should
here be any residue of scale forming substances unattacked by the compound these
re so enveloped in its vegetable and other glutinous constituents as to be prevented
om adhering to each other & be caused to remain in a soft plastic condition
which state at the cleaning of the boiler they may without difficulty be
ashed out.
By the improved compound calcareous deposits are not only prevented from forming
hard crust within the boiler but the incrustation already formed is acted upon
werfully by the creosote
tween the plates of the boiler and the crust, thus eventually detaching the incrustation
green mineral oils which gradually insinuate themselves
large flakes or scales.
Having now particularly described & ascertained the nature of my said inven-
& in what manner the same is to be performed I declare that what I
im is
A compound which not onl….

page_text: the interior of the boiler or tubes with a dark filmlike coating preserves the plates
from corrosion also at same time neutralizing the corrosive properties present in the
water.
Dated this 13th day of November 1890.
JAMES LUVIAN WADE.