Reverse Osmosis Membrane Element

Reverse Osmosis Technology Introduction

Osmosis and Reverse Osmosis
Osmosis is a natural process in which water (the solvent) spontaneously passes through a semipermeable membrane from a solution of lower concentration to a solution of higher concentration, ultimately achieving a dynamic equilibrium of solute concentration on both sides of the membrane.

Reverse osmosis is a process where water flows in the opposite direction of natural osmosis—from the concentrated solution to the dilute solution. This process must be achieved by applying external pressure. The osmotic pressure on both sides of the semi-permeable membrane, the internal resistance of the membrane itself, and the resistance formed on the membrane surface and inside its pores due to fouling during operation collectively hinder the reverse flow of water. Therefore, the applied pressure in reverse osmosis must significantly exceed the osmotic pressure difference of the solution itself.

Reverse Osmosis Membrane(RO/NF)
Reverse osmosis systems must rely on reverse osmosis membranes (i.e., the semi-permeable membranes mentioned above) to achieve the separation of solutes and solvents. Reverse osmosis membranes allow the solvent to pass through while retaining other solutes. Currently, the vast majority of reverse osmosis membranes are multi-layer composite polymer structures with a polyamide-based separation layer. These membranes provide excellent separation performance and durability under conventional feed water conditions.

Product features

Optimization of the membrane element's structural design and spiral-winding technology enables superior hydrodynamic conditions during operation, resulting in enhanced performance. Validated through extensive engineering applications, Membrane Industry has developed spiral-wound element products with a more user-focused design.

● Optimized spacer thickness and structure create superior hydrodynamic conditions, enhancing the fouling resistance of the membrane element;

● High packing density of membrane leaves combined with uniform sealing technology promotes higher permeate flow and salt rejection rates;

● Increasing the number of membrane leaves reduces the permeate flow path length, thereby improving permeation efficiency;

● A fully automated, mechanized spiral-winding process ensures consistent product quality and stable performance;

● Dry membrane elements offer greater convenience for transportation and long-term storage.