Improvements in Apparatus for Supplying Disincrustants to Steam Boilers, Economisers, and the like.
Year: 1893

page_text: Date of Application, 12th July, 1893-Accepted, 9th Sept., 1893
COMPLETE SPECIFICATION.
Improvements in Apparatus for Supplying Disincrustants to Steam
Boilers, Economisers, and the like.
I, JOHN ALFRED MORRIS, Engineer, Empire Works, 78 Great Bridgewater
Street Manchester, Lancashire, 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 object of my invention is to enable liquid disincrustants to be introduced
into steam boilers, economisers &c., so that the scale which is usually deposited in
such appliances may be obviated, or if already formed, may be removed.
In the following description its application to steam boilers is shewn, from which
description its application to analogous purposes will be understood, reference being
made to the accompanying drawings, in which similar letters of reference indicate
corresponding parts.
Fig. 1 is an elevation of the apparatus complete, ready for insertion into the
boiler top, whilst if it is preferred to fix it on the boiler front, it can be done by
arranging a wrought iron (or other metal) bend screwed into the front above the
water line, and fixing the apparatus into the bend.
Fig. 2 is a sectional elevation of the apparatus.
A is the reservoir for containing the liquid disincrustant or detergent (as tannate
of soda), filled through an aperture closed by plug B; C is an internal tube intro-
duced to allow steam to enter the reservoir; is a hole in plug E for allowing
the disincrustant to escape; E is a valve or plug having two holes or passages
made in it, the one (M) for admitting pressure into the reservoir, and the
other (D) for allowing the disincrustant to escape. G is a screwed bush for
compressing packing against top of plug E and keeping same tight and in position.
H is a sight glass tube through which the liquid can be seen falling from the
nozzle J on its way to the boiler, convenient holes being left in the hollow stand
surrounding the glass tube, for this purpose. K is a small screwed washer or bush,
used for compressing the packing against sight glass tube to keep it steam tight;
or the glass might be made tight in other ways such as by having the whole of the
hollow stand loose from the reservoir, and screwing it to same, the latter action
being utilised to form a pressure through suitable packings, on end of glass tube to
make it steam tight. L is a handle by which the plug E is moved, so as to
completely or partially shut off the escape of liquid and the ingress of steam
pressure.
The action of the apparatus is as follows. The handle L being placed in a
horizontal position, so as to close both inlet and outlet passages; plug B is
removed and the reservoir A is filled with the disincrustant or detergent, after
which B is replaced.
The handle L is then turned into a vertical position, thus opening a thoroughfare
through both inlet and outlet passages, and is kept in this position until the liquid
begins to flow from the nozzle J, when L is gradually moved towards the horizontal
position until the outlet passage is sufficiently contracted, so as to only supply the
requisite quantity of disincrustant. It will be noticed that if both holes or passages
J and M were equal in size, that when the outlet J is contracted, the inlet M
would be similarly contracted, so, to prevent this and always ensure the same
pressure in reservoir as in the boiler, we make the passage M of a larger
diameter than J, or else elongate it, so that a much greater travel of the lever L
is required to close M than J.
In cases where the sight glass is deemed unnecessary, it may be left out and the

page_text: apparatus made without it, the action of the instrument will still be identical with
that described above, the only difference being that the supply will not be seen.
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:-
1. The combination of a boiler feeder with a single plug for regulating and
shutting off both inlet and outlet passages, constructed, arranged, and operating in
the manner and for the purpose substantially as herein before described and shewn
on the drawings.
2. The combination of a boiler feeder of the drop feed or gravity type having
the sight glass underneath the reservoir, as applied in the introduction of disin-
crustants &c., for the prevention of the formation of scale in boilers, economisers &c.,
substantially as hereinbefore described and shewn on the drawings.
3. The general construction, arrangement and combination of the several and
respective parts together forming my improvements in boiler feeders, substantially
as hereinbefore described and shewn on the drawings.
Dated this 11th day of July 1893.
JOHN ALFRED MORRIS.