Apparatus for the Electrolytic Treatment of Bleaching Liquids.
Year: 1898

page_text: Date of Application, 21st Jan., 1898-Accepted, 2nd Apr., 1898
COMPLETE SPECIFICATION.
Apparatus for the Electrolytic Treatment of Bleaching Liquids.
"
I, MAX HAAS, of Markt Strasse, of Aue, in the Kingdom of Saxony, German
Empire, Electrician, 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 relates to apparatus for the electrolytic treatment of bleaching
liquids and has for its object to provide, by means of special chambers arranged
between the electrodes and the lower portion of the vessel, regular spaces in which
the slime or sediment of the liquid can become deposited; thus obviating to a very
large degree the possibility of the formation of short circuits.
I have illustrated my invention in the accompanying drawing, in which
Figure 1 shows a vertical longitudinal section, &
Figure 2 a vertical cross-section, and
Figure 3 a vertical cross section between two adjoining intermediate or interior
electrodes.
My improved apparatus for the electrolytic treatment of bleaching liquids,
consists of a number of upright electrodes, which can be advantageously employed
as double-pole electrodes. The outside vessel is preferably in the form of a
trough and is separated, by the beforesaid upright electrodes, into a number of
separate chambers or divisions. The object of this arrangement is to cause the
liquid to travel through the vessel in a winding path, that is to say, first over and
then under the intermediate electrodes; this method of conducting the liquid
having already proved advantageous in practice.
The known arrangement of the electrodes, as described in the preceding
paragraph has, however, the disadvantage, that, by the deposit or precipitation of
slime from the liquid a short circuit can readily be formed between two
electrodes, which of course, results in considerably diminishing the efficiency of
such apparatus.
This drawback is obviated by means of my improved apparatus forming the
subject of this application in such manner, that the electrodes are arranged or
located at approximately the centre of the liquid, so that underneath, or below, the
electrodes, dead chambers or spaces are formed, i.e. spaces in which the current
does not influence the liquid under treatment, said spaces serving the purpose of
receiving the slime or precipitation from the liquid and obviating a short circuit
being formed between two electrode plates.
Furthermore in my improved electrolytic vessel, in consequence of the liquid
covering the upper portion of the electrodes, a more perfect absorption of the
chlorine gas is brought about.
The drawing hereto annexed, shows one of the most simple constructions of
carrying out my invention.
Above and below the electrodes are cross-bars or cross-ridges of non-conducting
or insulating material, said ridges having openings alternate on their upper and
lower sides, through which the circulation or passage of the liquid can take place,
or I may employ, to produce the winding path for the liquid, perforated and
unperforated cross-ridges alternately below the electrodes only.

page_text: It will be seen from the drawing, that by the special location of the insulating
cross-ridges, as regards the openings or apertures in same, the liquid is caused to
flow in a winding path alternately over and under the electrodes.
My improved apparatus is cleansed by rotating same to an angle of 90°, i.e. by
placing the same in an upright position and causing a powerful water stream to
play upon the same. This can be effected in a very short time and without
considerably interfering with the general use or operation of the said
apparatus.
In the drawing, C is the outside vessel or trough of cement or the like with
vertical slots or apertures, into which the herein before mentioned insulating
ridges (S) and the carbon electrodes (K) are inserted. The ridges (S) are provided
with holes or slots as above mentioned for the passage of the liquid.
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. An apparatus for the electrolytic treatment of bleaching liquids, characterised
by, the arrangement of a number of preferably upright electrodes (K), alternately
above and below which electrodes, the liquid flows in a winding path or direction ;
also characterised by the arrangement of sediment chambers or spaces, at the
bottom of the trough (C), said sediment chambers being beyond the influence of
the electric current and the flow of the liquid, and located or arranged between
the separate and preferably double pole electrodes, cross-ridges of non-conducting
material being arranged under each electrode, the before mentioned sediment
chambers having the purpose of receiving the sediment or slime deposited from the
liquid, substantially as described.
2. A form of construction of the electrolytic apparatus, as characterised
in Claim 1, in which sediment-chambers between the separate electrodes (K) are
formed, by the arrangement of alternative perforated and unperforated cross-
ridges (S) of insulating material, substantially as described.
ומ
By Geo. H. Rayner,
MAX HAAS,
37, Chancery Lane, London, Agent for the Applicant.