Liquid purification or separation – Filter – Movable medium
Patent
1989-05-03
1991-07-09
Fisher, Richard V.
Liquid purification or separation
Filter
Movable medium
209297, 210377, 210394, 210403, B01D 33044
Patent
active
050303481
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to an arrangement for an inlet and an outlet in a rotating drum sieve for the separation of solid particles from a liquid mixed with particles, which drum sieve comprises a drum casing provided with a sieve opening and a feed screw situated internally within the drum, and is arranged for the supply of a liquid mixed with particles to the internal space of the drum and for the removal of sieved material from the internal space of the drum.
The principal object of the present invention is first and foremost to make available an arrangement of the kind indicated above, which, apart from permitting the simple construction of the drum, etc., amongst other things permits the even and effective supply of liquid containing particles to the drum sieve and the effective and simple discharge of drained material from the internal space of the drum.
Said object is achieved by means of an arrangement in accordance with the present invention, which is characterized essentially in that the inlet and the outlet are formed each by its own part of a co-rotating pipe situated internally within the drum and extending through the entire drum, which pipe exhibits a number of supply openings distributed along the longitudinal sense of the pipe and displaced in relation to one another around the circumference of the pipe for the purpose of supplying a liquid mixed with particles to the internal receiving space of the drum, at the same time as the drum and the pipe are caused to rotate.
The invention is described below as a preferred illustrative embodiment, in conjunction with which reference is made to the drawings, in which:
FIG. 1 shows a perspective view of a schematically illustrated drum sieve plant which contains an arrangement in accordance with the present invention;
FIG. 2 shows a drum sieve in a partially sectioned view showing an inlet part arranged in a first position;
FIG. 3 shows the drum sieve and the inlet part in a second position;
FIG. 4 shows an outlet arrangement in a drum sieve with an overflow shown here to be effective over the width;
FIG. 5 shows the outlet arrangement in a first position; and
FIG. 6 shows the outlet arrangement in a second position.
Internally within a receiving space 1 in a rotating drum sieve 2, which comprises a drum casing 3 provided with a sieve opening and a feed screw 4 situated internally within the space 1, there is present an inlet 5, which is arranged for the supply of liquid 6 mixed with particles to said internal space 1, so that solid particles 7 shall be capable of being separated from said liquid 6 when the drum sieve is caused to rotate.
The inlet 5 consists of a part 8A of a pipe 8 extending internally within the drum 2 centrally along the length of the drum, which pipe also exhibits a number of supply openings 9-11 distributed along the longitudinal sense of the pipe and displaced in relation to one another around the circumference of the pipe, which openings are intended for the supply of liquid 6 mixed with particles to the internal receiving space 1 of the drum, at the same time as the drum 2 is caused to rotate, preferably in conjunction with said inlet 5. In this embodiment, the pipe and supply openings, the inlet, the drum casing, and the feed screw rotate together as one unit.
The rotating inlet 5 is capable of connection via a pipe seal T of an appropriate kind to an incoming line 5A, which is permanent and which consists, for example, of a rigidly supported pipe, conveniently being a pipe which is attached to a frame of the sieve arrangement.
At least one supply opening 9-11 extends from the internal space 12 of the inlet to each of the spaces 13-15 formed between parts 4A-4D of the screw 4 attached to the pipe 8 and the drum casing 3. The openings 9-11 are conveniently of slotted shape and extend in the longitudinal sense of the pipe and are displaced in relation to one another around the circumference of the pipe.
Arranged internally within the pipe 8 is a transverse wall V, which is so arranged as to restrict the flow of the liq
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patent: 1843791 (1932-02-01), Stadler
patent: 2858942 (1958-11-01), Wentzelberger
patent: 3372810 (1968-03-01), Kletschke
patent: 4278543 (1981-07-01), Maniquis
patent: 4298473 (1981-11-01), Wyman
Drodge Joseph
Fisher Richard V.
Roto-Sieve AB
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