Liquid purification or separation – Tangential flow or centrifugal fluid action – Multiple cyclone
Patent
1994-06-13
1995-09-05
Dawson, Robert A.
Liquid purification or separation
Tangential flow or centrifugal fluid action
Multiple cyclone
209728, 210787, B01D 2126
Patent
active
054476321
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a hydrocyclone plant for treating fibre suspensions comprising a multiplicity of elongated hydrocyclone bodies, each of which has an apex end and a base end, and is designed with an exterior sealing surface having a circular cross-section. In the hydrocyclone plant there is a wall provided with circular holes, into which the respective hydrocyclones are inserted, so that the sealing surfaces extend through the holes. Circular sealing rings extend around the respective sealing surfaces and are situated in the holes of the wall to seal between the sealing surfaces and the wall.
In known hydrocyclone plants of this kind the sealing rings are made of an elastic rubber material with a relatively poor resistancy to the chemicals which can be found in the fibre suspensions which are treated. Thus, the chemicals may affect the sealing rings of rubber, so that these become hard or are dissolved, which has the consequence that the seal between the sealing surfaces of the hydrocyclone bodies and said wall becomes unreliable. In addition, it may occur that the sealing rings of rubber swell, so that the hydrocyclone bodies are jammed in the wall, which results in that disassembly of individual hydrocyclone bodies is made difficult.
It is true that the sealing rings could be made of existing chemical resistant rubber material, whereby the problem of unreliable sealing and jamming of the hydrocyclone bodies could be eliminated. However, such chemical resistant rubber materials are too expensive to justify their use in a hydrocyclone plant, which may comprise hundreds of hydrocyclone bodies, each of which requires two sealing rings.
The object of the present invention is to provide in a simple and inexpensive manner a hydrocyclone plant of the kind here present, in which the seal between the hydrocyclone bodies and the wall is reliable, and in which the hydrocyclone bodies do not risk getting stuck in the wall.
This object is obtained by means of a hydrocyclone plant of the kind described initially, which mainly is characterized in that--a) each sealing ring is radially cut through, so that two opposite free ends are formed on the sealing ring as seen in the circumferential direction of the sealing ring, the sealing ring being stiff enough to prevent it from loosening from its associated hydrocyclone body in the direction transverse to the latter, when the hydrocyclone body is dismounted from the wall;--b) the sealing surface of each hydrocyclone body has a radial extension which increases along the sealing surface in the direction towards the base end of the hydrocyclone body and is provided with a projection extending axially along the sealing surface and between the free ends of the sealing ring associated to the sealing surface; c) each sealing ring is dimensioned such that it is insertable into any of the holes of the wall, when the sealing ring is situated in a first position on its associated sealing surface, and is expanded by the sealing surface, so that the sealing ring seals between the wall and the sealing surface, when the sealing ring is inserted into any of the holes of the wall and is situated in a second position on the sealing surface, in which the sealing surface has a greater diameter than in said first position; and --d) each sealing ring is provided with a radially outwardly directed stop, which is adapted to abut against the wall, so that the sealing ring is entrained by the wall from said first position to said second position, when the sealing ring is inserted into any of the holes of the wall and the hydrocyclone body on which the sealing ring is applied is displaced with its apex end leading through said holes in the wall.
Hereby the sealing rings need not be elastic but can be made of an inexpensive elastic plastic or moulded plastic compound which is resistant to the chemicals which can be found in the fibre suspensions which are treated.
Advantageously the projection on the sealing surface of each hydrocyclone body is dimensioned such that it substantially fil
REFERENCES:
patent: 3598731 (1971-08-01), Frykhult et al.
patent: 3959150 (1976-05-01), Frykhult et al.
patent: 4426283 (1984-01-01), Fecske
patent: 4539105 (1985-09-01), Metcalf
Celleco Hedemora AB
Dawson Robert A.
Reitsnyder David
LandOfFree
Hydrocyclone plant does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Hydrocyclone plant, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydrocyclone plant will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-470611