Vacuum Membrane Distillation Equipment

Vacuum membrane distillation membrane contactors.

Vacuum membrane distillation equipment.

Microporous hydrophobic membranes are used to separate the aqueous stream from a gas phase kept under vacuum. Abstract vacuum membrane distillation is a membrane based separation process considered here to remove volatile organic compounds from aqueous streams. Modelling of pore wetting in membrane distillation compared with pervaporation. On the other hand membrane.

In this case condensation takes place outside of the membrane module. Flat sheet vmd systems recover the brine energy by employing a cascade system to improve the shc. Vmd is an evaporative process that physically. In one example brine is circulated in a tank.

Membrane distillation md is widely employed in separation processes such as. Vacuum membrane distillation vmd. Integrated systems involving. Hollow fiber vmd systems however have not yet been optimized for energy recovery.

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 tank may include one or more membrane pouches that are submerged in the circulating brine or placed above the water level of. 1 2 future development membrane distillation is an alternative to the traditional evaporative distillation systems used for desalination or water purification processes. The flow diagram of the vmd system.

The driving force of the process is a partial vapour pressure difference commonly triggered by a temperature difference. Membrane distillation md is a thermally driven separation process in which separation is driven by phase change a hydrophobic membrane presents a barrier for the liquid phase allowing the vapour phase e g. Although vacuum membrane distillation vmd has a high distillate flux its potential is limited by its high specific heat consumption shc. Different configurations for example gas gap membrane distillation or vacuum membrane distillation will be considered in the next sections.

Desalination concentration in food industries acid manufacturing removing organic and heavy metals treating radioactive waste. 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. Water vapour to pass through the membrane s pores.

Exergy analysis of a vacuum membrane distillation system integrated with mechanical vapor recompression for sulfuric acid waste treatment 1.