Improvements in Apparatus for Mixing Precipitants with Sewage and the like Liquids.
Year: 1895

page_text: Date of Application, 1st Apr., 1895-Accepted, 4th May, 1895
COMPLETE SPECIFICATION.
Improvements in Apparatus for Mixing Precipitants with Sewage
and the like Liquids.
I, JOSEPH BERRY of the Albion Foundry, Swinton, Manchester, in the County
of Lancaster, Iron Founder, 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 mixing precipitants with sewage and other
foul and waste liquids, and it has for its object to effect the mixture of the
precipitating material and the liquid without the aid of mechanical motion.
For this purpose I construct a tank, preferably of circular cross section, in
which the precipitating material is placed. Around this tank, there is arranged
a channel or channels having an outlet or outlets in communication with the sewage
or other liquid. In the lower part of the tank, there is or are an inlet or inlets
for liquid destined to dissolve or mix with the precipitating material, and which
passes through this material in the lower part of the tank, out of which it issues
through suitable openings into the channel or channels whence it flows into the
sewage or other liquid. The inlet may either be in communication with a fair
water supply, or with the foul liquid supply, if the latter has a sufficient head
for the purpose, and it may be controlled by a valve, the opening of which may
either be regulated by hand or by a float in the liquid to be operated on.
latter case, the greater the quantity of the foul liquid, the wider the valve will be
opened, and consequently, the greater will be the supply of the precipitant, and the
contrary, so that the supply is automatically controlled as required, by the quantity
of the foul liquid to be purified.
In the
In the form of the apparatus illustrated in vertical cross section by Figure 1
of the accompanying drawings, T, is the tank into which the precipitating material
is supplied. C, is the channel into which the dissolved or mixed precipitant
flows from the tank. I, is the inlet for the fluid destined to dissolve or mix with the
precipitant, and O is the outlet from the channel, leading to the sewage or other
foul liquid to be purified by precipitation. It is preferred to cast the tank body
separately from the channel and base, and to return the sides of the channel so
as to form a cover. Snugs, S, may be cast on the outside of the tank, to rest upon
the channel cover, thereby holding the bottom edge of the tank a little above the
base, and leaving an annular outlet into the channel. Other methods of construction
may however obviously be employed.
The inlet is preferred to be taken through a vertical pipe, P, as shewn, this
pipe being perforated at its upper part and closed at the end. Of course, the
longer this pipe is, the longer will be the passage of the liquid therefrom to the
outlet, and therefore, the greater will be the opportunity for the liquid to dissolve
or mix with the precipitant. The rate of flow also determines the rate of mixture
or solution of the precipitant.
In the modified form of the apparatus illustrated by Figure 2 of the drawings in
vertical cross section, there is a false bottom B, below which is the inlet I. Holes, H,
are cast or formed in the walls of the tank, at some distance above the perforated
false bottom. The channel surrounding the tank is, in this case, shewn open at the
top to permit the inflow of liquid from the tank, but it is to be understood that I may,
The pre-
in any form of the apparatus, vary the construction of the channel.
cipitant being fed into the tank, the liquid, as described with reference to Figure 1,

page_text: is allowed to flow through the inlet, and out through the holes H, to the channel C,
whence it passes through the outlet O to the sewage or other liquid.
The form of apparatus illustrated by Figure 1 is suitable for cases where the
precipitant employed is not entirely soluble, and that illustrated by Figure 2 for
use with soluble precipitants.
Figures 3 and 4 are respectively plan views of the apparatus illustrated by
Figures and 2.
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 :-
Apparatus for mixing precipitants with sewage and like liquids, const cted and
arranged substantially as herein before described with reference to the accompanying
drawings.
Dated this 30th dow of Manh A D 1005