Membrane Distillation Module

Product Overview

The membrane distillation module uses PTFE microporous hollow fiber membranes, with the vapor pressure difference across the membrane driving mass transfer. It efficiently separates water and volatile substances from aqueous solutions.

This module is ideal for seawater desalination, advanced industrial wastewater treatment, and solution concentration. Compared to traditional distillation, membrane distillation can utilize low-grade heat sources, requires less space, lowers investment costs, and delivers a highly efficient, energy-saving, and reliable system.

Working Principle

Membrane distillation is a separation and concentration process using a hydrophobic PTFE membrane to separate the feed side from the permeate side. When the feed liquid is heated, vapor is generated, creating a vapor pressure difference across the membrane. The vapor passes through the membrane pores and condenses on the permeate side, separating water and volatile components from the solution.

The process can be driven at low temperatures, making it compatible with various waste heat sources, such as hot water, steam, or solar energy. Modular design ensures full utilization of thermal energy and high system efficiency.

Key Features

· Hydrophobic PTFE membrane: high temperature, acid/base, and solvent resistant with excellent chemical stability.

· Uniform pore structure with narrow size distribution for high separation efficiency.

· No chemical leaching, suitable for food, beverage, and other sensitive applications.

· Optimized fluid design reduces concentration polarization and scaling risks.

· Modular assembly saves space and reduces installation costs.

· Stepwise heat utilization enables efficient energy recovery.

· Low-temperature operation allows use of low-grade waste heat.

· All-plastic construction provides excellent corrosion resistance and long service life.

· Effective removal of volatile components from aqueous solutions, enabling high-purity water production or solution concentration.

Applications

· Desalination of seawater or brackish water.

· Advanced treatment and reuse of industrial wastewater, including reducing RO concentrate and achieving near-zero liquid discharge.

· Deep processing of concentrated brine from seawater desalination.

· Concentration, purification, or crystallization of saline solutions in chemical plants.

· Concentration of acidic or alkaline solutions.

· Concentration of aqueous solutions containing non-volatile or semi-volatile organic compounds.