Scalable liquid distribution system for large scale chromatography columns
View Patent ↗A uniform fluid distribution system ( 2 ) for use with a liquid transfer system ( 100 ) for maintaining an interface between liquid phases within a large scale separator system including a cell into which liquid may be introduced as discrete phases at an inlet zone occupying a first approximately transverse cross-sectional region of said cell and outputted at an outlet zone occupying a second approximately transverse cross-sectional region of said cell. Said distribution system comprises at least one liquid inlet ( 24 ) and at least two distribution outlets ( 32 ), which are connected by an internal flow connection system ( 36 ). Wherein said distribution outlets ( 32 ) are formed as concentric annular or rectilinear distribution-slots ( 32 ), each with an unique radius/distance to the midpoint r to the midpoint between an inner slot-radius/distance to the midpoint and an outer slot-radius/distance to the midpoint, said radii/distances to the midpoint defining a slot-width w, through which annular distribution-slot ( 32 ) liquid entering said inlet ( 24 ) is distributed to said cell along an approximately horizontal plane, and said internal flow connection system ( 36 ) is formed such that it provides an essentially uniform fluid flow through the distribution-slots ( 32 ).
1. A uniform fluid distribution system ( 2 ) for use with a liquid transfer system ( 100 ) for maintaining an interface between liquid phases within a large scale separator system including a cell having a circular or rectilinear cross-sectional shape into which liquid may be introduced as discrete phases at an inlet zone occupying a first approximately transverse cross-sectional region of said cell and outputted at an outlet zone occupying a second approximately transverse cross-sectional region of said cell, said distribution system comprising at least one liquid inlet ( 24 ) and at least two distribution outlets ( 32 ), which are connected by an internal flow connection system ( 36 ), wherein,
said distribution outlets ( 32 ) consist of only concentric annular distribution-slots ( 32 ) for a cell having a circular cross-sectional shape or only rectilinear distribution-slots ( 32 ′) for a cell having a rectilinear cross-sectional shape, each distribution-slot ( 32 ; 32 ′) with an unique radius/distance r to the midpoint between an inner slot-radius/distance to the midpoint and an outer slot-radius/distance to the midpoint, said radii/distances to the midpoint defining a slot-width w, through which annular/rectilinear distribution-slot ( 32 : 32 ′) liquid entering said inlet ( 24 ) is distributed to said cell along an approximately horizontal plane.
2. The distribution system ( 2 ) of claim 1 , wherein
each distribution-slot ( 32 ) provides a distributed liquid flow to an associated central distribution-area (A 1 ) extending inwards from r and a peripheral distribution-area extending outwards from r, and further wherein
if said central distribution-area (A 1 ) is associated with the most central distribution slot ( 32 ), then it extends to the centre of the cell,
if said central distribution-area (A 1 ) is associated with a distribution slot ( 32 ) that surrounds another distribution slot ( 32 ), then it has an inner radius/distance to the midpoint that is equal to the outer radius/distance to the midpoint of the peripheral distribution-area associated with the closest distribution-slot ( 32 ) of smaller radius/distance to the midpoint,
if said peripheral distribution-area is associated with the most peripheral distribution slot ( 32 ), then it extends to the edge of the cell,
if said peripheral distribution-area is associated with a distribution slot ( 32 ) that is surrounded by another distribution slot ( 32 ), then it has an outer radius/distance to the midpoint that is equal to the inner periphery of the central distribution-area (A 1 ) associated with the closest distribution-slot ( 32 ) of greater radius/distance to the midpoint, and
the radius/distance to the midpoint r of each distribution-slot ( 32 ) is chosen such that the central distribution-area (A 1 ) is equal to or smaller than the peripheral distribution-area (A 2 ).
3. The distribution system ( 2 ) of claim 1 , wherein the radius/distance to the midpoint r of each distribution-slot ( 32 ) is chosen such that the area of the adjacent inner distribution-area for each slot is less than the adjacent outer distribution-area for that slot.
4. The distribution system ( 2 ) of claim 1 , wherein the radius/distance to the midpoint r of each distribution-slot ( 32 ) is chosen such that the ratio between the central distribution-area to the peripheral distribution-area is in the interval 35:65 to 42:58.
5. The distribution system ( 2 ) of claim 1 , wherein the radius/distance to the midpoint r of each distribution-slot ( 32 ) is chosen such that the ratio between the central distribution-area to the peripheral distribution-area is approximately 40:60.
6. The distribution system ( 2 ) of claim 1 , wherein the internal flow connection system ( 36 ) is essentially rotationally symmetric.
7. The distribution system ( 2 ) of claim 1 , wherein the internal flow connection system ( 36 ) is comprised of a branched channel structure terminating at said distribution-slots ( 32 ).
8. The distribution system ( 2 ) of claim 1 , which includes
a disc shaped main body ( 4 ) having a top and a bottom surface ( 14 and 16 ), said main body ( 4 ) having at least two concentric circular recesses ( 18 , 20 , 22 ) formed in the bottom surface ( 16 ), each recess ( 18 , 20 , 22 ) defining a distribution level (level 1 , 2 , 3 . . . ), each recess ( 18 , 20 , 22 ) having a larger radius than the one defining the previous level, and an inlet connection between the inlet ( 24 ) and the first recess ( 18 ) (level 0 ), and
a circular distribution body ( 6 ) concentrically arranged in said recesses ( 18 , 20 , 22 ) and formed such that it is comprised of one disc-shaped portion ( 26 , 28 , 30 ) for each level (level 1 , 2 , 3 . . . ) as defined by said recesses ( 18 , 20 , 22 ), each disc-shaped ( 26 , 28 , 30 ) portion having a smaller radius than the one corresponding to the previous level,
whereby, in the first level, an annular distribution slot ( 32 ) is formed between the inner periphery of the first recess ( 18 ) and the outer periphery of the first disc-shaped portion ( 26 ) and a radial flow connection ( 36 ) is formed between the top of the circular distribution body ( 6 ) and the bottom of the first recess ( 18 ), and
at least one annular distribution body ( 8 , 10 , 12 ) concentrically arranged in a concentric annular recess defined by a circular recess ( 20 , 22 ) of level two or higher and the corresponding disc-shaped portion ( 28 , 30 ) of the circular distribution body ( 6 ), each annular distribution body ( 8 , 10 , 12 ) being formed such that an annular distribution slot ( 32 ) is formed at its inner and outer periphery respectively and such that a radial flow connection ( 36 ) is created between at least one annular distribution slot ( 32 ) of the previous level and the annular distribution slots ( 32 ) associated with that annular distribution body ( 8 , 10 , 12 ), whereby at least two annular distribution slots ( 32 ) are formed.
9. The distribution system ( 2 ) of claim 8 , wherein the number of concentrically arranged annular distribution bodies ( 8 , 10 , 12 ) in each level is chosen such that the number of annular distribution slots ( 32 ) increases with a factor two for each successive level.
10. The distribution system ( 2 ) of claim 8 , wherein said circular distribution body ( 6 ) comprise spacing elements that protrude from the top surface, the spacing elements supports the distribution body ( 6 ) with respect to the bottom of the recess ( 18 ), thereby defining the height of said radial flow connection ( 36 ) in the first level.
11. The distribution system ( 2 ) of claim 8 , wherein said annular distribution bodies ( 8 , 10 , 12 ) each comprise spacing elements ( 11 ) that protrude from the top surface, the spacing elements being able to support the distribution bodies ( 8 , 10 , 12 ) with respect to the bottom surfaces of the previous level, thereby defining the height of said radial flow connection ( 36 ) in that level.
12. The distribution system ( 2 ) of claim 1 , wherein the internal flow connection system ( 36 ) has a conical shaped fluid path with large channel height at the position of highest fluid velocity.
13. The distribution system ( 2 ) of claim 1 , including a distribution gap ( 106 ) occupying a cross-sectional region of a predetermined height, located directly after the distribution slots ( 32 ) of the highest level (level 3 ) in the longitudinal direction of flow.
14. The distribution system ( 2 ) of claim 13 , wherein the distribution gap ( 106 ) is conically shaped with respect to the distribution slots ( 32 ), and is formed such that the fluid path has a larger channel height at the position of higher fluid velocity.
15. The distribution system ( 2 ) of claim 1 , including a perforated plate ( 108 ) terminating the distribution gap in the longitudinal direction of flow.
16. The distribution system ( 2 ) of claim 15 , wherein the perforated plate ( 108 ) is comprised of a perforated plate having spacing elements that protrude from the top surface, the spacing elements supports the plate with respect to the bottom of the main body ( 4 ) and the distribution bodies ( 6 , 8 , 10 , 12 ), thereby defining the height of said distribution gap ( 106 ).
17. The distribution system ( 2 ) of claim 1 , wherein the flow connection system ( 36 ) comprises fillets/chamfers applied to the edges of the distribution bodies ( 6 , 8 , 10 , 12 ) anywhere the fluid is changing the main direction of flow.