Vacuum Membrane Distillation Equipment

Vacuum membrane distillation membrane contactors.

Vacuum membrane distillation equipment.

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. In this case condensation takes place outside of the membrane module. 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. Hollow fiber vmd systems however have not yet been optimized for energy recovery.

Desalination concentration in food industries acid manufacturing removing organic and heavy metals treating radioactive waste. Membrane distillation md is widely employed in separation processes such as. Modelling of pore wetting in membrane distillation compared with pervaporation. Flat sheet vmd systems recover the brine energy by employing a cascade system to improve the shc.

Although vacuum membrane distillation vmd has a high distillate flux its potential is limited by its high specific heat consumption shc. Fundamentals membrane materials and key operations. 1 2 future development membrane distillation is an alternative to the traditional evaporative distillation systems used for desalination or water purification processes. Exergy analysis of a vacuum membrane distillation system integrated with mechanical vapor recompression for sulfuric acid waste treatment 1.

The driving force of the process is a partial vapour pressure difference commonly triggered by a temperature difference. Different configurations for example gas gap membrane distillation or vacuum membrane distillation will be considered in the next sections. Vacuum membrane distillation vmd. Vmd is an evaporative process that physically.

Integrated systems involving. In this method the driving force is the vacuum applied at the permeate side of the membrane by a vacuum pump. In one example brine is circulated in a tank. Water vapour to pass through the membrane s pores.

The flow diagram of the vmd system. Microporous hydrophobic membranes are used to separate the aqueous stream from a gas phase kept under vacuum. Sulfuric acid waste is one of the common industrial waste waters all over the world the direct. On the other hand membrane.

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.