PTFE cartridge flat plate membrane still

Abstract

The invention provides a PTFE cylinder type plate membrane distiller. The plate membrane distiller comprises a chlorinated poly vinyl chloride (CPVC) membrane cylinder and combined filter elements. The combined filter elements are placed in the CPVC membrane cylinder and two ends of central air suction pipes of the combined filter elements penetrate through the CPVC membrane cylinder. Multiple groups of high-porosity PTFE hydrophobic membranes and polyethylene terephthalate (PET) fiber woven flat screens are combined to form circular plate vacuum membrane components. Each of the circular plate vacuum membrane components is connected in series by one of the central air suction pipes to form one of the combined filter element. A liquid inlet is arranged at the lower end of the CPVC membrane cylinder, and a liquid outlet is arranged at the upper end. Processed liquid materials are fed through the liquid inlet, submerge the combined filter element completely when penetrating through the circular plate vacuum membrane components, and are discharged through the liquid outlet to form circulation flow. Vapor of the PED fiber woven flat screens is suctioned out through holes in the central air suction pipes and subsequently condensed to form product water. The PTFE cylinder type plate membrane distiller is simple in manufacturing process and beneficial for mass production.

Description

technical field [0001] The invention relates to the technical field of water treatment equipment, in particular to a polytetrafluoroethylene cylindrical flat film distiller. Background technique [0002] Membrane distillation is a membrane separation process that uses a hydrophobic microporous membrane and uses the difference in vapor pressure on both sides of the membrane as the driving force for mass transfer. Driven by the vapor pressure difference on both sides of the microporous hydrophobic membrane, water vapor passes through the hydrophobic membrane from the heated raw water side and then is condensed into a liquid separation process. Due to the hydrophobicity of the membrane, only water vapor can pass through the membrane pores, and raw water and non-volatile solutes dissolved in it cannot pass through the membrane pores, so the membrane distillation process can theoretically treat ions, macromolecules, colloids, cells and other non-volatile substances. Volatile mat...

AI Technical Summary

Problems solved by technology

The plate-type flat-plate membrane still needs a shaped mold, which is large in size and heavy in weight. The structure is stacked, which is inconvenient to replace and maintain. A pore size ratio of 50% can be achieved. The flux is too small and the production of membrane filaments is not easy for mass production. The same problem exists in submerged membrane filament stills.

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