Filter device
AssigneeAstraZeneca AB
InventorHåkan Glad
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Abstract
The present invention relates to a filter device, especially for a fluidised bed system and particularly for use in the pharmaceutical industry, for separating particles larger than a separating grain from an amount of particles in a fluid flow. The filter device includes a housing and at least one filter portion. A part of the housing is mounted for rotational movement, and the filter portion is provided in the housing, whereby the filter portion is movable upon rotation of the housing. The present invention also relates to a method for separating particles using such a filter device.
Claims31
A fluidized bed system comprising a fluidized bed vessel, wherein the fluidized bed vessel comprises:
- a surface supporting a bed of particles;
- a fluid flow inlet for delivering a fluid flow through the bed of particles;
- and
- a filter device for separating particles larger than a separating grain from an amount of particles in a fluid flow, wherein;
- the filter device is positioned above the supporting surface and comprises a housing and at least one filter portion sized and configured for separating the particles based upon the size of the particles;
- a part of the housing is mounted for rotational movement;
- the filter portion is provided in the housing and movable upon rotation of the housing;
- and
- the fluid flow inlet is configured to deliver a fluid flow through the bed of particles to cause the particles to flow upwards towards the filter device.
A fluidized bed vessel comprising:
- a surface for supporting a bed of particles;
- a fluid inlet for delivering a fluid flow through the bed of particles;
- and
- a filter device for separating particles larger than a separating grain from an amount of particles in a fluid flow, wherein:
- the filter device is positioned above the supporting surface and comprises a housing and at least one filter portion sized and configured for separating the particles based upon the size of the particles;
- a part of the housing is mounted for rotational movement;
- the filter portion is provided in the housing and movable upon rotation of the housing;
- and
- the fluid flow inlet is configured to deliver a fluid flow through the bed of particles to cause the particles to flow upwards towards the filter device.
A method for separating particles larger than a separating grain from an amount of particles in a fluid flow, the method comprising:
- passing the fluid flow through a fluidized bed system or fluidized bed vessel comprising a rotatable filter device which is positioned above a bed of particles, wherein the fluid flow through the bed causes the particles to flow upwards towards the filter device;
- and
- wherein the method comprises varying the rotational velocity of the filter portion during operation for obtaining the desired separating grain.
Dependencies are inferred from the claim text.