IMPROVEMENTS IN APPARATUS FOR PREVENTING THE INCRUSTATION AND THE ACCUMULATION OF SEDIMENT IN STEAM BOILERS
Year: 1869

page_text: PROVISIONAL SPECIFICATION left by Henry Bernoulli Barlow at the
Office of the Commissioners of Patents, with his Petition, on the
16th September 1869.--A communication from abroad by Carl-
Forster, junior, of Augsburg, in the Kingdom of Bavaria.
I, HENRY BERNOULLI BARLOW, junior, of Manchester, in the County
of Lancaster, Patent Agent, do hereby declare the nature of the said
Invention for "IMPROVEMENTS IN APPARATUS FOR PREVENTING THE INCRUSTATION
AND THE ACCUMULATION OF SEDIMENT IN STEAM BOILERS," a communication to
me from abroad by Carl Forster, junior, of Augsburg, in the Kingdom
of Bavaria, to be as follows:-
This Invention consists in placing a vessel above the boiler and con-
nected to it by two pipes, as follows:-To the top of the boiler I bolt a
standard, through which are two small passages or pipes; to the upper
end of this standard a cock or valve is secured having two passages
through it to open or close the passages from the boiler through the
standard to a closed vessel, which vessel I bolt on to the upper side of
the cock or valve; this closed vessel, which is secured to the boiler by
the standard and valve chamber, has two pipes in it extending upwards

page_text: from the passages in the valve chamber to about its centre, or a little
higher; the passages or pipes at the lower end of the standard are
connected to two similar pipes projecting downwards into the boiler,
reaching below the low-water level. In this manner there is a con-
tinuous passage from the boiler to the closed vessel above, as described,
by means of two distinct pipes and passages, each pipe being open at
both ends, but capable of being closed by the valve between the boiler
and closed vessel above.
The operation is as follows:-The closed vessel is filled or partially
filled with water from the boiler, or in other convenient manner. So
long as the water in the boiler and the closed vessel are of the same
temperature, or the water in the closed vessel above the boiler is of the
higher temperature no circulation between the two will take place, but
whenever the water of the boiler is heated beyond that of the water in
the upper vessel a circulation immediately commences through one of
the pipes or passages conveying the warm water upwards into the closed
vessel at the same time the cooler water in the closed vessel commences
to flow back to the boiler through the other pipe; this action is con-
tinuous so long as the water in the boiler is kept heated, it is found that
the slight difference of temperature of the water in the two vessels is
sufficient to maintain the circulation. The closed vessel is provided
with a valve in its cover for the purpose of filling it with water, or for
introducing anti-incrustation compounds or liquids; at the bottom of
this vessel is another valve by which the sediment or loose scale may be
removed. When it is desired to make use of anti-incrustation com-
pounds I admit them into the boiler as follows:-The valve between
the boiler and the closed vessel must be shut, thus destroying all
connection between them; through the valve in the cover I admit the
compound or liquid and then close the valve; the valve between the
boiler and vessel being opened a circulation is established, and the liquid
carried from the upper vessel to the boiler. It is obvious that during
the circulation through the upper vessel a portion of sediment is con-
tinually settling at the bottom of this vessel; this sediment may be
removed at any time by opening the valve provided for that purpose.