Fluent material handling – with receiver or receiver coacting mea – Receiver filled through bottom or while inverted
Patent
1998-12-21
2000-09-26
Douglas, Steven O.
Fluent material handling, with receiver or receiver coacting mea
Receiver filled through bottom or while inverted
141286, 239687, B65B 104
Patent
active
061231215
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to an apparatus for distributing pulp in connection with the supply of pulp to a container of storage and/or treatment of the pulp.
BACKGROUND OF THE INVENTION
In a container for a flow of pulp it is often essential that the residence time of the pulp in the container be substantially the same for all portions of the pulp flowing through the container. This particularly applies to treatment of the pulp by an agent, for example in the bleaching of the pulp. It is, thus, essential to avoid channelization in the container. During the treatment of the pulp with an agent, which is supplied prior to the supply of the pulp to the container, it is also important that the agent be distributed uniformly in the pulp at the inlet to the container, in order to thereby achieve homogenous treatment. It has thus been found that the way in which the pulp is supplied to the container is of decisive importance for the solution of the aforesaid problems.
During the supply of pulp, different types of distributors are used. For example, these include mechanical distributors with an inlet housing and an axial rotor, the shaft of which is supported in bearings and sealed by a packing box. A gear and a motor are thus required for driving the rotor.
Mechanical distributors are also used, in which a rotor is formed with two or more outlet channels.
These mechanical distributors generally require a complicated design, because they comprise a rotor with an accessory drive, bearings, and a sealing arrangement. These distributors are also not adapted to varying pulp flows and production levels.
According to a somewhat simplified construction, a distributor is used which comprises a pump-like housing outside the container bottom, where at least four outlets are arranged symmetrically about the circumference of the container. Such a device requires a control valve in each outlet and separate pipe lines for connection to the container. This device is also very complicated, while its distribution effect is rather limited, and its flow direction is wrong.
In addition to the mechanical distributors, there also exist static distributors with conical surfaces for dispersing the pulp in the container. These distributors cannot be controlled, and the distribution achieved is often insufficient.
SUMMARY OF THE INVENTION
In accordance with the present invention these and other difficulties have now been overcome by the discovery of apparatus for the distribution of a pulp flow supplied to a container comprising an inlet for the pulp flow into one end of the container, a cylindrical wall disposed within the inlet and laterally defining a distribution chamber for the container, a surface member within the container facing the inlet spaced from the cylindrical wall and extending laterally at least to a location corresponding to the cylindrical wall thereby defining a gap between the surface member and the cylindrical wall whereby the pulp flow can pass laterally through the gap into the container for distribution therein, and gap adjusting means for adjusting the size of the gap. Preferably the surface member comprises a substantially planar surface.
In accordance with one embodiment of the apparatus of the present invention the surface member is stationary and the gap adjustment means comprises an auxiliary portion of the cylindrical wall for axially extending the cylindrical wall toward the surface member.
In accordance with another embodiment of the apparatus of the present invention the surface member is axially movable toward the cylindrical wall.
In accordance with another embodiment of the apparatus of the present invention the distribution chamber has a first cross-sectional area and the inlet has a second cross-sectional area, the first cross-sectional area being greater than the second cross-sectional area.
In accordance with the preferred embodiment of the apparatus of the present invention, the apparatus includes the plurality of guide plates radially disposed within the distribut
REFERENCES:
patent: 2764011 (1956-09-01), Richter
patent: 4621507 (1986-11-01), Lundqvist
patent: 5366288 (1994-11-01), Dahllof et al.
patent: 5399198 (1995-03-01), Ghaisas
patent: 5988234 (1999-11-01), Wegman
Bergdahl Anders
Forslund Kjell
Kristrom Klas
Lindstrom Alf
Douglas Steven O.
Valmet Fibertech Aktiebolag
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