Vacuum Membrane Distillation Equipment

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Fundamentals membrane materials and key operations.

Vacuum membrane distillation equipment.

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. 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. Vmd is an evaporative process that physically.

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. 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 flow diagram of the vmd system.

Although vacuum membrane distillation vmd has a high distillate flux its potential is limited by its high specific heat consumption shc. Vacuum membrane distillation membrane contactors. 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. The tank may include one or more membrane pouches that are submerged in the circulating brine or placed above the water level of. In this method the driving force is the vacuum applied at the permeate side of the membrane by a vacuum pump. Water vapour to pass through the membrane s pores.

Vacuum membrane distillation vmd. Different configurations for example gas gap membrane distillation or vacuum membrane distillation will be considered in the next sections. This md con uration is termed vacuum membrane distillation vmd. The driving force of the process is a partial vapour pressure difference commonly triggered by a temperature difference.

Exergy analysis of a vacuum membrane distillation system integrated with mechanical vapor recompression for sulfuric acid waste treatment 1. Integrated systems involving. Sulfuric acid waste is one of the common industrial waste waters all over the world the direct. 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.

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