Vacuum Membrane Distillation Equipment

1 2 future development membrane distillation is an alternative to the traditional evaporative distillation systems used for desalination or water purification processes.

Vacuum membrane distillation equipment.

Desalination concentration in food industries acid manufacturing removing organic and heavy metals treating radioactive waste. Vacuum membrane distillation membrane contactors. Fundamentals membrane materials and key operations. Embodiments provide methods and structures for purification or volume reduction of a brine by an advanced vacuum distillation process avmd to achieve higher flux by passage of vapors through an avmd distillation unit.

In this method the driving force is the vacuum applied at the permeate side of the membrane by a vacuum pump. Ii vacuumisappliedinthepermeatesideofthe membrane module by means of a vacuum pump theappliedvacuumpressureislower than the saturation pressure of volatile molecules to be separated from the feed solution. The driving force of the process is a partial vapour pressure difference commonly triggered by a temperature difference. This md con uration is termed vacuum membrane distillation vmd.

The tank may include one or more membrane pouches that are submerged in the circulating brine or placed above the water level of. Microporous hydrophobic membranes are used to separate the aqueous stream from a gas phase kept under vacuum. On the other hand membrane. In one example brine is circulated in a tank.

Flat sheet vmd systems recover the brine energy by employing a cascade system to improve the shc. Hollow fiber vmd systems however have not yet been optimized for energy recovery. Different configurations for example gas gap membrane distillation or vacuum membrane distillation will be considered in the next sections. The flow diagram of the vmd system.

Integrated systems involving. Vmd is an evaporative process that physically. Sulfuric acid waste is one of the common industrial waste waters all over the world the direct. Vacuum membrane distillation vmd.

Exergy analysis of a vacuum membrane distillation system integrated with mechanical vapor recompression for sulfuric acid waste treatment 1. Water vapour to pass through the membrane s pores. Abstract vacuum membrane distillation is a membrane based separation process considered here to remove volatile organic compounds from aqueous streams. Membrane distillation md is widely employed in separation processes such as.

Although vacuum membrane distillation vmd has a high distillate flux its potential is limited by its high specific heat consumption shc.