FLAT FILTRATION MODULE

摘要

Membranes are arranged in a stack with flat sheets of feed channel spacer and permeate carrier. Flat feed channels and permeate channels alternate through the thickness of the stack. Edges of the feed channels are sealed along the length of the stack. Edges of the permeate channels are sealed across the width of the stack. The stack may be more than 1.5 m long. Optionally, membranes may be sealed to each other without being folded. A filtration element comprises a stack and a shell. The shell has at least an inlet to the feed channels and a permeate outlet. Optionally, the element may be operated in a permeate side cross flow configuration. Parts of the stack may be pre-assembled, in some cases by an automated process. The filtration element may be used for reverse osmosis, forward osmosis, pressure retarded osmosis or nanofiltration.

主权项

1. A stack, comprising:
flat sheet membranes; one or more flat sheets of feed spacer; and, one or more flat sheets of permeate carrier, wherein the stack has one or more generally flat feed channels and one or more generally flat permeate channels alternating through the thickness of the stack.