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Патент USA US2129802

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Sept. 13, 1938.
l.‘ WALLQUIST
2,129,802
APPARATUS FOR RECOVERING PARTICLES FROM LIQUIDS
Filed March 19, 1937
INVEN TOR.‘
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2,129,8t2
Patented Sept. 13, 1938
ATENT orsc ’
UNITED ' STATES
2,129,802
APPARATUS FOR RECOVERING PARTICLES
FROM LIQUIDS
Ivar Wallquist, Karlstad, Sweden
Application March 19, 1937, Serial No. 131,972
In Sweden March 20, 1936
2 Claims.
(Cl. 210—198)
The present invention relates to apparatus for
recovering of particles from liquids, for instance
?bres and other particles from so-called white
water of paper mills, ground wood-pulp mills and
formed on the continuously moving wire cloth.
The liquid ?owing to the second container lb,
accordingly contains only ?ner particles. The
layer of particles formed on the wire cloth on the
?rst cylinder 2a is brought by the wire cloth onto
the second cylinder 21), where the layer serves as
a ?lter for the ?ner particles remaining in the
construction, reliable in operation and which will liquid when passing from the container ib into
show high efficiency in the recovering of the par- I the cylinder 2b. In this way a high degree of
puri?cation of the liquid is obtained. In order
0 ticles.
to accelerate the passing of the liquid from the
With this and other objects in View the inven
containers into respective cylinders, an increased
tion consists in certain novel features of con
struction and combination of parts as hereinafter difference of pressure may be established be
tween the liquid outside and inside the ?rst or
set. forth and pointed out in the claims.
One embodiment of the invention is illustrated the second cylinder or both. This pressure dif
Ul
5 cellulose-pulp mills.
The invention has for its object to create an
apparatus of this kind, which will be of simple
in the accompanying drawing in which Fig. 1
shows a vertical section of the apparatus, Fig. 2
is a plan View of same with the wire cloth re
moved, Fig. 3 is an axial and vertical section of
a the cylinder and container. With reference to
the drawing Ia and lb denote two vats or con
tainers in each of which a rotary drum or cylin
der 2a and 2b respectively is provided. The pe
ripheries of the cylinders consist of coarse wire
cloth, perforated plate or similar material. The
ends of the cylinders are closed with the excep
tion of a hole in the centre of one of the ends,
to which a hollow shaft, 3a or 3b respectively is
connected. The shafts 4a and 4b respectively of
the other end of the cylinders are solid. Over
the two cylinders, which are driven in some suit
ference may be accomplished either by a reduced
pressure inside the cylinders or by an increased
pressure outside them or by both. The two con
tainers may be placed on the same level, and in
this case a pump may be used to transport the 20
liquid from the cylinder 3a to the container lb‘,
or the two containers may be on di?erent levels
as shown in the drawings in which case the liquid
may ?ow by gravity.
When the wire cloth 5 leaves the second cylin
der 2?), it passes over the guide roll ii where the
layer of particles comes on the underside of the
cloth. If the layer then sticks to the roll 6
rather than to the wire cloth 5, it continues on
and with the surface of the roll 6. The layer may
then be taken off the roll 6 by a scraper or doctor
able manner, an endless wire cloth 5 runs which ‘ 58, after which it falls down into a chute [2 or
may be of a kind similar to thatv used in paper similar means from which, after eventual dilu
machines. The wire cloth runs over guide rolls, tion with water, it may be transported to the
place where the recovered particles are to be used 5
w Ul one of which, 6, also serves another purpose as
will be hereinafter described, while the others, ‘I, or disposed of. If the layer it] rather sticks to
serve to guide the wire cloth in suitable directions the underside of the wire cloth 5 than to the
so as to run free from the containers, Ia, lb. roll 6, it may be taken off the cloth for instance
One of the containers Ia, has an inlet 8a for the by a sprayer pipe H, and it may then fall down '
g0 liquid to be puri?ed. Said liquid passes through into and be removed through the chute I2. If 40
the cylinder 2a and the portion of the wire cloth a layer having, a high degree of dryness is de
running over same and escapes from the interior sired, the roll 6 may be pressed against the cyl
of the cylinder through the hollow shaft 3a and inder 21), whereby some of the water in the layer
through the pipe or conduit 9a into the second is pressed out.
It is evident that the liquid may also be brought
container lb. ‘Then the liquid passes into the
second cylinder 2?) through the wire cloth run
ning over same, and escapes from this cylinder
to pass the wire cloth three or more times.
On the portion of the wire cloth running'over
the first cylinder 2a practically all, coarser and
some of the ?ner particles in‘the liquid settle,
ways without the principle of the invention being
If
the liquid, for instance, has to pass three times
through the hollow shaft 3?) and the pipe or con- 1 through the wire cloth the wire cloth has to run
duit 9b‘ connected to same. Suitable packings , over three cylinders and through three contain
are provided between the rotating outlets 3a, 3b ers inv a Way corresponding to the embodiment of
Figs. 1-3.
and. the stationary pipes 9a, 911.
55 so that an unbroken layer of particles In is
; The details of the apparatus may vary in many
changed.
What I claim is:
55
2
2,129,802
1. An apparatus for recovering of particles
from liquids comprising an endless movable ?lter
ing cloth, a plurality of containers, a rotary per
vious cylinder in each of said containers, each
container having an inlet formed therein for the
liquid to be treated on the outside of the cylinder
and an outlet formed therein for the liquid from
the interior of the cylinder, the outlet of one
container being connected with the inlet of the
second container, and an endless ?ltering cloth
vious cylinder in each of said containers, each
container having an inlet formed therein for the
liquid to be treated on the outside of the cylinder
and an outlet formed therein for the liquid from
the interior of the cylinder, the outlet of one con
tainer being connected with the inlet of the sec
ond container, an endless ?ltering cloth running
over said rotary cylinders whereby a layer of
particles from the liquid is formed in one con
tainer and serve as a ?lter for the same liquid 10
running over said rotary cylinders whereby a .in a second container, and a guide roll having
layer of particles from the liquid is formed in
one container and serve as a ?lterv for the same
liquid in a second container.
15
2. An apparatus for recovering of particles
from liquids comprising an endless movable ?lter
ing cloth, a plurality of containers, a rotary per
said ?ltering cloth running thereover after hav
ing passed through the last container and adapt
ed to take off the layer of particles recovered
from the liquid by said ?ltering cloth.
IVAR WALLQUIST.
15
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