Header block for tubular membrane permeator modules

• US 4,016,078 A
• Filed: 03/06/1975
• Issued: 04/05/1977
• Est. Priority Date: 03/06/1975
• Status: Expired due to Term

• Current Assignee: The Dow Chemical Company (Dow, Inc.)
• Original Assignee: The Dow Chemical Company (Dow, Inc.)
• Inventors: Clark, George B.
• Primary Examiner(s): Spear, Jr., Frank A.
• Application Number:
  US05/556,055
• Time in Patent Office: 761 Days
• Field of Search: 210/94, 210/336, 210/339, 210/433 M, 210/236 H, 210/321 R, 210/323 T
• US Class Current: 210/94
• CPC Class Codes: B01D 2313/10 Specific supply elements
• CPC Class Codes: B01D 2313/105 Supply manifolds
• CPC Class Codes: B01D 2313/12 Specific discharge elements
• CPC Class Codes: B01D 2313/125 Discharge manifolds
• CPC Class Codes: B01D 63/023 Encapsulating materials
• CPC Class Codes: B01D 63/06 Tubular membrane modules
• CPC Class Codes: B01D 63/063 on the inner surface thereof
• CPC Class Codes: B01D 65/00 Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes

Abstract

An improved header block for tubular membrane permeator modules, which has particular advantage for ultrafiltration operations, is disclosed. The header block is very compact and is formable by casting or molding and machining. In cooperation with a collector plate and end-plate, it provides both feed (or concentrate) and permeate manifolds. The high pressure differentials and/or cumbersome "turn arounds" or manifolds heretofore used are obviated by said block. A plurality of modules comprising such blocks may be joined side-by-side, in cooperation with appropriate side-plate and gasket means, to provide a variety of flow distributions and/or modes. The header block is uniquely appropriate for handling high volume flow rates required to ensure turbulent, high velocity flow of feed liquid within each permeator tube. The end plates preferably are transparent, to permit facile inspection of the permeate stream from each tube in each module.

Claims

1. A header block having:

1. two opposed, generally planar faces, joined by a feed bore through said block, the axis of said bore being generally perpendicular to each of said faces;

2. a third generally planar face, to which said bore axis is generally parallel, connected to the bore and pierced by a plurality of generally parallel feed passageways terminating in said bore;

the walls defining the portions of said passageways adjacent said third face being adapted to receive, position and, in cooperation with suitable sealing means, to sealingly engage terminal portions of tubes inserted therein; and

3. a fourth generally planar face, opposed and generally parallel to said third face and connected thereto by a plurality of permeate conduits which pass through said block and are not connected with said feed bore.

2. A block as in claim 1 in which the total cross-sectional area of said passageways is not greater than the cross-sectional area of said feed bore.

3. A block, as in claim 1, having said fourth face sealingly engaged with a generally planar surface of an end plate, the resulting assembly being adapted by grooves in said surface or in said face to receive and conduct away permeate issuing from the permeate conduits in said block.

4. An assembly as in claim 3 which is also adapted by one of said grooves, in cooperation with suitable intervening sealing means, to receive and pass on permeate discharged from an adjacent such assembly.

5. An assembly as in claim 3 in which said end plate is transparent.

6. A block, as in claim 1, having said third face sealingly engaged with a first generally planar surface of a permeate-collecting plate having a second generally planar surface opposed and generally parallel to said first surface,

said plate being pierced through by permeate bores which connect said surfaces and register and communicate with the corresponding permeate conduits in said block,

said plate also being pierced through from surface to surface by passageways which register and communicate with the fluid passageways in said block, the portion of each of said passageways in said plate, adjacent to the second surface being enlarged by recessing the wall of said portion to define an annular interior shoulder.

each of said enlarged passageway portions being connected to one of the permeate bores piercing said plate by a groove in said second plate surface,

the diameter of the non-enlarged portion of each passageway through the plate being essentially the same as that of the portion of the corresponding passageway in said block, the wall of which is adapted to receive a tube end, and

said sealing engagement between said plate and said block being effected through an intervening first sealing means which is adapted, in cooperation with the block and plate to prevent flow of feed other than in the interiors of tubes inserted in the passageways.

7. A block, plate and sealing means as in claim 6 in which the second face of the plate is sealingly engaged with a generally planar face of a tube-sheet member in which are fixed terminal portions of a parallel array of rigid, impermeable support tubes having longitudinal permeate flow-directing grooves in their interior surfaces and containing closely fitting permeable tubes, the terminal portions of which are impermeable and extend through intervening second sealing means fitting loosely thereabout, through the collecting plate and through said first sealing means in sealing engagement therewith and are received by the portions of the walls of said passageways in said block adapted to receive said tube ends,

said first and second sealing means being adapted, in cooperation with the other components of the resulting assembly, to ensure that permeate is conducted from the ends of the grooves inside the support tubes along the exterior surfaces of the impermeable portions of the inner tubes to the spaces between them and the enlarged portions of the passageways in the plate and is directed therefrom through the collecting grooves and permeate bores in the plate to the corresponding permeate conduits in the block.

8. An assembly as in claim 7 having sealingly engaged with said fourth face of said block a generally planar surface of an end plate, the resulting module being adapted by grooves in said surface or in said face to receive and conduct away permeate issuing from the permeate conduits in said block.

9. A module as in claim 8 which also is adapted by one of said grooves, in cooperation with suitable sealing means, to receive and pass on permeate discharged from an adjacent such module.

10. A module as in claim 9 wherein said end plate is transparent.