Improvements in or relating to Separators for the Removal of Scum and other impurities from Steam Boilers, Economisers, and the like.
Year: 1896

page_text: PROVISIONAL SPECIFICATION.
Improvements in or relating to Separators for the Removal of Scum
and other impurities from Steam Boilers, Economisers, and the
like.
I, GEORGE WALLIS ALLEN, of 27 Brazennose Street, Manchester, in the County
of Lancaster, Engineer, do hereby declare the nature of this invention to be as
follows:-
My invention relates to improvements in or relating to separators for the
removal of scum and other impurities from steam boilers, economisers and the like
and my invention is particularly adapted to the separator described in the Patent
granted to H. J. A. Bowers No. 12810 of 1885, my object being to obtain a better
and an automatic control of the circulating current of water and the blowing out
and cleaning of the apparatus.
In a separator made according to the Specification referred to it has been found
that when the blow-off cock is opened the current of liquid has been reversed in
the separator which was detrimental to the proper working of the apparatus.
According to my present invention I attach preferably to the side of the
separator a box or casing which carries two valve spindles the first of which carries
a valve for opening and closing the pipe which connects the boiler to the top of
the separator, which valve is normally open, and the other spindle carries a valve
on the blow-off pipe from the bottom of the separator which valve is normally
closed, these spindles are arranged so that when the first spindle is moved to
close it the valve on the blow-off pipe will be opened and the pressure
of steam in the separator will force out all the scum and impurities and
at the same time the partial vacuum formed in the separator will cause all
the scum on the scum plate to be drawn from the scum plate through a pipe
and into the separator.
Any convenient mechanism may be employed for this purpose. In one arrange-
ment a spring is used to hold each valve in its normal position and a shaft driven
in any convenient manner carries a disc upon which are projections or recesses
adapted to actuate the valve spindles automatically and simultaneously or nearly
so and by varying the speed of the shaft or the size and shape of the projections
the action of the valves may be varied as desired.
In cases where the water is so clear that a separator is not required the scum
plate or trough or both may be connected to a blow off pipe fitted with a discharge
valve and I arrange the mechanism to open this valve at suitable intervals
automatically.
1 1900

page_text: COMPLETE SPECIFICATION.
Improvements in or relating to Separators for the Removal of Scum
and other impurities from Steam Boilers, Economisers, and the
like.
I, GEORGE WALLIS ALLEN, of 27 Brazennose Street, Manchester, in the County
of Lancaster, Engineer, 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 improvements in, or relating to Separators for the
removal of scum or other impurities from Steam Boilers, Economisers, or the like,
and my invention is particularly adapted to the Separator described in the
Patent granted to H. J. A. Bowers, No. 12810, of 1885. My object being to obtain
a better and an automatic control of the circulating current of water, and the
blowing out and cleaning of the apparatus.
In a separator made according to the specification referred to, it has been
experienced, that when the blow off cock is opened, the circulating current has
sometimes reversed, which was detrimental to the proper working of the apparatus.
According to my present invention, I attach, preferably to the side of the
Separator, a box or casing, which encloses the mechanism actuating the spindles
which open and close two valves or cocks, one to control the circulating current,
the other to blow out the accumulated deposits or impurities. And in order that
this invention be fully understood, I will describe the accompanying sheet of
drawings. Reference being had to the figures and letters marked thereon.
Fig. 1. is an end view of the apparatus.
Fig. 2. is a plan of the same.
Fig. 3. is a side elevation of the apparatus, attached to a Separator, and to the
cocks or valves which require to be opened and shut. The first of the valve
spindles (F) is attached to a valve (A) for opening and closing the pipe which
connects the Boiler to the Separator (S), which valve (A) is normally open, and
the other spindle (F) is attached to a valve (B) on the blow off pipe at the bottom
of the Separator, which valve is normally closed. Any convenient mechanism
may be employed for this purpose. In the present arrangement, a spring (K
and K²) is used to hold each valve (A and B) in its normal position, and a shaft (C)
driven in any convenient manner, carries a disc (D), upon which are projections,
or recesses (EE) on opposite sides, adapted to actuate the valves spindles (F1, F2)
automatically, and consecutively. The disc (D) revolves upon a sleeve (G), and is
driven, preferably by a paul (H), actuated by a crank (J) secured to shaft (C).
On motion being applied to shaft (C) the disc (D) revolves, and bringing the
projection (E) in contact with spindle (F) raises it and closes the valve (A). The
opposite projection (E) then comes into contact with spindle (F2) in a similar
manner, and opens the blow off valve (B). The revolving disc (D) in due time
causes the projection (E2) to recede from spindle (F2) when valve (B) is closed
by the action of the spring (K2); the valve (A) being released and closed in a
similar manner.
In cases where the water is so clear that a Separator is not required, the scum-
plate, or trough, or both, may be connected to a blow-off pipe fitted with a discharge
valve, and I arrange the mechanism to open this valve at suitable intervals
automatically.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what I
claim is:-
1st. The General arrangement and combination of mechanism, for automatically
onening and closing cocks or valves for the nurnose of removing deposits or im-

page_text: purities from boilers or vessels under pressure, substantially as, and for the purposes
herein described and as illustrated by the drawings annexed.
2nd. In a Boiler, or any vessel under pressure, the use and application of a
scum-plate and trough in combination with a Separator, and an automatic valve
5 closing and opening mechanism, or equivalent. substantially as, and for the
purposes herein described with reference to the accompanying drawings.
Dated this 28th day of June 1897.
GEORGE WALLIS ALLEN.