| 摘要 |
Longitudinal extension and consequent destruction of spirally wound membrane modules arranged in paired axial alignment within a pressure vessel of an ultrafiltration unit are prevented by a pair of end-cap anti-telescoping devices (ATD's) and a central ATD. The central ATD is an integral assembly of a perforated circular steel plate and a solid interconnector that is concentrically disposed at its hub section with tubular ends protruding on each side of the plate and having an outer peripheral groove for an o-ring near each end for sealingly engaging the ends of a pair of membrane modules. Longitudinal extension of the spirally wound membranes is prevented by a plurality of axially protruding lugs that are concentrically disposed on each side of the plate for engaging the proximal ends of the permeate tubes and by the flat, circular faces of the central ATD engaging the ends of the membranes. Each of a pair of end-cap ATD's is rigidly attached to a circular interconnector on one side, facing the distal end of one membrane module, and is rigidly attached on the other side to one end of a permeate outlet support tube that is rigidly attached at its other end to an end cap through which a permeate outlet port axially extends. The end cap is sealingly clamped onto the end of the pressure vessel within which the ultrafiltration process is conducted. Each end-cap ATD has a flat, circular face engaging the distal end of a membrane and a plurality of circularly disposed lugs engaging the distal end of a permeate tube.
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