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US 4,900,440 AGranted
Dynamic pressure filter
AssigneeSulzer Brothers Limited
InventorsHeinrich Ziegler, Jan R. P. de Fries
Life of this patent
Estimating the term…
Abstract
The dynamic pressure filter is constructed with a plurality of coaxially disposed rotor sectors and stator sectors. Filter surfaces are mounted on each of the sectors to define annular filter chambers for receiving a suspension to be filtered under pressure. In addition, vortex breakers are provided at the downstream end of each filter chamber for destroying the flow structure of the suspension prior to flow into the downstream filter chamber.
Claims19
A dynamic pressure filter comprising
- a cylindrical rotor drum;
- a cylindrical stator drum mounted coaxially about said rotor drum;
- a first filter surface mounted on said rotor drum to define an annular collecting chamber for a filtrate;
- a second filter surface mounted on said stator drum to define an annular collecting chamber for a filtrate and concentrically spaced from said first filter surface to define an annular filter chamber for receiving a suspension to be filtered under pressure;
- and
- at least one vortex breaker subdividing said annular chamber into longitudinal sections and disposed for destroying the flow structure of the suspension in an upstream longitudinal section to allow a new flow structure to form in the suspension in a downstream longitudinal section.
3 more elements
A dynamic pressure filter comprising
- a rotor drum having a plurality of coaxially disposed rotor sectors;
- a stator drum mounted coaxially about said rotor drum and having a plurality of coaxially disposed stator sectors;
- a first filter surface mounted on each said rotor sector to define an annular collecting chamber for a filtrate;
- a second filter surface mounted on each said stator sector to define an annular collecting chamber for a filtrate and concentrically spaced from said first filter surface to define an annular filter chamber for receiving a suspension to be filtered under pressure;
- and
- a vortex breaker disposed between each adjacent rotor sector and stator sector for destroying the flow structure of the suspension in an upstream filter chamber to allow a new flow structure to form in the suspension in a downstream filter chamber.
3 more elements
A dynamic pressure filter comprising
- a rotor drum;
- a stator drum mounted coaxially about said rotor drum;
- a first filter surface mounted on said rotor drum to define an annular collecting chamber for a filtrate;
- a second filter surface mounted on said stator drum to define an annular collecting chamber for a filtrate and concentrically spaced from said first filter surface to define an annular filter chamber for receiving a suspension to be filtered under pressure;
- and
- at least one hydrodynamic bearing subdividing said annular chamber into longitudinal sections and disposed in the flow of the suspension for destroying the flow structure of the suspension in an upstream longitudinal section to allow a new flow structure to form in the suspension in a downstream longitudinal section.
3 more elements
A dynamic pressure filter comprising
- a rotor drum;
- a stator drum mounted coaxially about said rotor drum;
- a first filter surface mounted on said rotor drum to define an annular collecting chamber for a filtrate;
- a second filter surface mounted on said stator drum to define an annular collecting chamber for a filtrate and concentrically spaced from said first filter surface to define an annular filter chamber for receiving a suspension to be filtered under pressure;
- at least one vortex breaker subdividing said annular chamber into longitudinal sections and disposed for destroying the flow structure of the suspension in an upstream longitudinal section to allow a new flow structure to form in the suspension in a downstream longitudinal section;
- a first duct extending radially inwardly and upwardly at an angle for a flow of suspension;
- a first annular duct in said rotor communicating with said first duct and extending radially outwardly and upwardly at an angle to said filter chamber;
- a second annular duct in said rotor communicating with a downstream end of said filter chamber to receive concentrate therefrom and extending radially inwardly and upwardly from said filter chamber;
- and
- a second duct extending from said second annular duct to remove concentrate therefrom.
7 more elements
A dynamic pressure filter comprising
- a rotor drum having a plurality of coaxially disposed rotor sectors;
- a stator drum mounted coaxially about said rotor drum and having a plurality of coaxially disposed stator sectors;
- a first filter surface mounted on said rotor drum to define an annular collecting chamber for a filtrate;
- a second filter surface mounted on said stator drum to define an annular collecting chamber for a filtrate and concentrically spaced from said first filter surface to define an annular filter chamber for receiving a suspension to be filtered under pressure;
- at least one vortex breaker subdividing said annular chamber into longitudinal sections and disposed for destroying the flow structure of the suspension in an upstream longitudinal section to allow a new flow structure to form in the suspension in a downstream longitudinal section;
- driving and support elements interconnecting said rotor sectors;
- and
- seals sealing annular rooms surrounding said elements from said annular filter chambers and from said filtrate removal chambers in said rotor drum.
5 more elements
Dependencies are inferred from the claim text.