초록 ▼

A spirally-wrapped reverse osmosis membrane cell employing an envelope of semipermeable membrane sheets spirally wound or wrapped about a tubular mandrel. The convolutions of the membrane assembly are separated to form an open channel, directed feed flow path leading into a lateral opening or series

A spirally-wrapped reverse osmosis membrane cell employing an envelope of semipermeable membrane sheets spirally wound or wrapped about a tubular mandrel. The convolutions of the membrane assembly are separated to form an open channel, directed feed flow path leading into a lateral opening or series of openings in a communicating tubular member defining an unobstructed bore throughout its length. The feed separator may comprise a plurality of substantially parallel strips of impermeable material of a thickness sufficient to provide desired separation between membrane sheets and wherein the strips define a meandering fluid flow path throughout the length and width of the membrane sheet.

대표청구항 ▼

In a spirally wound membrane module comprising a casing defining a cylindrical chamber, a hollow, perforated mandrel disposed in coaxial relationship with and within said chamber, said mandrel having an unobstructed bore, an elongate envelope including a pair of semipermeable membrane sheets surroun

In a spirally wound membrane module comprising a casing defining a cylindrical chamber, a hollow, perforated mandrel disposed in coaxial relationship with and within said chamber, said mandrel having an unobstructed bore, an elongate envelope including a pair of semipermeable membrane sheets surrounding a permeate carrier sheet and spirally wound around said hollow mandrel and separator means maintaining spacial relationship between convulated layers of said elongate envelope, wherein the improvement comprises configuring the separator means to provide a dual function of maintaining said spacial relationship and of establishing a directed, open channel feed flowpath across the width and length of the convoluted membrane envelope, and wherein said flowpath is defined by said separator means to provide a non-interrupted meandering path extending from an inlet opening in one exposed marginal edge portion of said envelope and across the area defined substantially by the length and width of said envelope, to an outlet opening defined by the opposite marginal edge portion of said envelope.