Improvements in Screening and Mixing Chambers for Precipitating Tanks and the like for Treating Sewage and other Foul or Waste Waters.
Year: 1894

page_text: Date of Application, 3rd Sept., 1894
Complete Specification Left, 30th May, 1895-Accepted, 6th July, 1895
TRUVIDIONAL SPECIFICATIOA.
Improvements in Screening and Mixing Chambers for Precipitating
Tanks and the like for Treating Sewage and other Foul or
Waste Waters.
I, EDWARD WILLIAM IVES, of Strand Chambers, Derby in the County of
Derby, Engineer, do hereby declare the nature of this invention to be as
follows:-
The object of my invention is to break up and bring into suspension (without
the aid of moving machinery) the solids found in sewage and other foul or waste
waters for the more efficient precipitation or purification of the same.
For this purpose I construct a vertical screening chamber preferably circular on
plan and into this chamber I let in the sewage or foul or waste waters at a tangent
to the outer periphery of the said chamber for the purpose of giving a circular
motion to the sewage or foul or waste water. At or about the centre of the said
screening chamber I place an upright cylindrical screening cage made of iron or
other suitable metal or material to prevent the solids going through the same,
between this cage and the inside of the circular screening chamber I place
horizontal or vertical rods or bafflers to more readily break up the solids whilst
gyrating round the chamber.
In the bottom and at or about the centre of the circular screening chamber and
cage I place a vertical pipe or pipes for the purpose of carrying away the sewage
or foul or waste water in a downward direction and so conducting it away to
a precipitating tank or otherwise for chemical or other treatinent.
By constructing the screening and mixing chamber as described the greater
portion of the solids will be broken up-without clogging the screen-and brought
into suspension, and the sewage or foul or waste water is more uniformly mixed
and easily treated by chemicals or otherwise; for instance, supposing a great
quantity of coloured water or blood were to come down with the sewage or foul or
waste water, by constructing the circular chamber as described it would be more
uniformly mixed and the downward motion to the pipes as above described would
materially assist the mixing and it would be more easily precipitated or purified by
chemicals or otherwise.
By contracting the mouth of the inlet pipe I can get a greater velocity if
equired.
Dated this 1st day of September 1894.
W. SWINDELL,
Agent for the Applicant.

page_text: Improvements in Screening and Mixing Chambers for Precipitating
Tanks and the like for Treating Sewage and other Foul or
Waste Waters.
I, EDWARD WILLIAM IVES, of Strand Chambers, Derby in the County of
Derby, 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 :-
The object of my invention is to break up and bring into suspension (without
the aid of moving machinery) the solids found in sewage and other foul or waste
waters for the more efficient precipitation or purification of the same.
In describing my invention reference will be had to the accompanying sheet of
drawings which will be deemed to form a part of this Specification.
Figure 1 is a plan shewing the various parts of my improved screening chamber.
Figure 2 is a vertical section through the overflow on line b. b. of Figure 1.
Figure 3 is a vertical section on line a. a. of Figure 1.
In carrying out my invention I construct a vertical screening chamber A
preferably circular on plan, and into this chamber I admit at any convenient point
such as B the sewage or foul or waste waters at a tangent to the outer periphery
of the said chamber, for the purpose of giving a circular motion to the said sewage
or foul or waste water. At or about the centre of the said screening chamber
place an upright cylindrical or other shaped screening cage C made of iron or
other suitable metal or material to prevent the solids going through the same,
between this cage and the inside of the circular screening chamber I place rods or
bafflers D to more readily break up the solids whilst gyrating round the chamber.
In the bottom, which is preferably made of an inverted conical form as shewn,
and at or about the centre of the circular screening chamber and cage I place a
pipe E (or pipes) for the purpose of carrying away the sewage or foul or waste
water in a downward direction and so conducting it away, in the direction of the
arrows, to a precipitating tank or otherwise for chemical or other treatment.
By constructing the screening and' mixing chamber as described the greater
portion of the solids will be broken up without clogging the screen and brought
into suspension, and the sewage or foul or waste water is more uniformly mixed
and easily treated by chemicals or otherwise; for instance, 'supposing a great
quantity of coloured water or blood were to come down with the sewage or foul or
waste water, by constructing the circular chamber as described, it would be more
uniformly mixed and the downward motion to the pipes as above described would
materially assist the mixing and it would be more easily precipitated or purified
by chemicals or otherwise.
1.
"+
14
By contracting the mouth of the inlet pipe at B I can get a greater velocity if
required.
4
1
In case of a rush of sewage or other foul or waste waters such as after heavy
rains or the like, I provide an overflow or safety valve as shewn at F so that
when the sewage or foul or waste water reaches a certain level say G it over-
flows and passes away along a waste race H to any suitable point, or I may
employ any suitable arrangement of flood gate or the like at I to be raised or
lowered as required; by these means I provide an overflow or safety valve and
so prevent the upsetting of the precipitating tank or tanks to which the sewage
flows after passing from the screening chamber.

page_text: 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 improved construction of screening chamber A of a circular or
approximately circular shape on plan with inlet B, bafflers D, cylindrical or
other screening cage C, outlet E, and with or without the overflow or safety
valve F with its parts, all substantially as and for the purposes described and
illustrated.
1 1.
W. SWINDELL,
Agent for the Applicant.