Improvements in and in Apparatus for Treating Feed Water to Prevent Incrustation in Boilers: applicable for Treating or Purifying Water for other Purposes.
Year: 1896

page_text: Date of Application, 25th Feb., 1896-Accepted, 13th Feb., 1897
COMPLETE SPECIFICATION.
Improvements in and in Apparatus for Treating Feed Water to
Prevent Incrustation in Boilers: applicable for Treating or
Purifying Water for other Purposes.
We WILLIAM GRIFFITHS of 37 Doddington Grove, Kennington Park,
Loudon S.E. Engineer and VICTOR CHARLES READ, of 19 Seymour Road,
Harringay, London, N. Lithographic Printer, 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 :-
This invention is designed to prevent or reduce the incrustation or corrosion in
steam generators or boilers or the like by purifying or treating the water before
same is fed into such boiler, and may also, if desired be applied to the purification.
or treatment of water for other purposes.
We will now describe the invention in relation to the accompanying drawings
which are illustrative of the application.
Fig. 1 is a sectional elevation of an apparatus constructed according to the
invention.
Fig. 2 is a partial plan of the lower dividing circulation plate of the purifying
tank or vessel showing conveniently the circulating holes leading from the section
of the tank for the inflowing water to be subjected to treatment.
a is a tank or vessel, of any suitable size shape and material. It may be fitted
with a close cover or not.
b, is the inlet pipe of the feed water (before being passed into the boiler). The
pipe b, is shown with an equilibrium or ball valve b', and discharges into the
compartment a' of the tank a, thence entering at a³, into the lower portion of said
main container a.
The pipe is shown leading exhaust steam or steam from other source and
serving a heating coil c', in the lower portion of the container a. and is led off
at to a condenser or otherwise. Other means of heating may be used where
convenient.
In the tank a (or main compartment thereof) is arranged a series of zinc plates,
shelves or trays which fit or rest on ledges or between guideways or other suitable
supports or otherwise secured in position advantageously in such manner as to
permit of their being removed and replaced in position when desired.
Such zinc plates are placed extending, either horizontally or at any suitable angle,.
alternately from the opposite sides or ends of the tank nearly across same so that
the heated water is caused to assume a zig-zag course or passage successively above
and below the plates as same rises from the bottom upwards.
In the case shown in the drawings the bottom plate d is shown supported upon a
flange d', and perforated at d, for the upward passage and circulation of the water
being treated. The upper plates e, are supported upon the feet e, and are
perforated at e, the arrows indicating the course of the water.
At a, is the compartment for receiving the treated water; f, indicating a feed
water pipe leading to pump or boiler or otherwise as required.
During the prolonged travel of the heated water against the zinc surfaces the
impurities in the water are arrested or deposited on the plates and when same become
clogged or coated they can be cleaned in any suitable way, for instance by removal
from the tank and scraping or scrubbing both sides.

page_text: Instead of solid zinc plates any equivalent therefor may if desired be used for
instance trays or holders to contain zinc or its compounds in any suitable form
arranged horizontally or otherwise arranged so that the water has to take a
zig-zig course or otherwise pass in any other suitable direction in close contact
with such plates shelves or trays or the like or with the zinc carried therein or
thereon.
The invention will be very advantageous for purifying salt water either for
boiler feed purposes or for "condensers" (on board ship or elsewhere) used to
convert salt water into fresh or drinking-water our object being to extract the salt
or a large proportion thereof before the water is evaporated. In some cases the
"condensers" may be dispensed with when the water is found to be sufficiently
purified as same comes from our apparatus.
Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :-
First. The improvements in and in means for treating feed water as and for the
purposes herein set forth and substantially as shown by the drawings.
Secondly. In means for treating water the zinc surfaces as and for the purposes
set forth.