Portable sea-water desalination device by solar membrane distillation

Abstract

The invention as a portable device for desalinating sea-water by solar membrane distillation includes sea-water container which has hydrophobic membrane bottom, the bottom connecting circumference of sea-water container hermetically, beneath the said hydrophobic membrane, a finite gap, there set a cooling plate, the plate has a fresh-water outlet, the gap introduced before is air gap, sea-water container has an influent pipe and solar heating set. It also could include a floatage apparatus which floats on the sea, fully absorbing solar energy. This device applies the principle of air-gap membrane distillation, fully utilizes abundant source of solar energy snd sea-water around island; it is characterized by simple structure, portable move and low cost, and bring much convenient for residents and soliders who live on island.

Description

technical field [0001] The invention relates to the technical field of membrane distillation, in particular to a membrane distillation device for desalinating seawater by using low-grade energy solar energy as the driving force of membrane distillation, specifically a portable solar membrane distillation seawater desalination device. Background technique [0002] Human survival is inseparable from water, because scientific research shows that 59-66% of the human body is composed of water. To maintain the basic needs of human health, each person must get at least 20 liters of safe drinking water per day, plus other daily water , Each person needs about 50 liters of water per day. [0003] my country's island areas lack fresh water, and the sea water contains a lot of salt and other impurities, which cannot be directly drunk. In this way, whether residents or soldiers defending the island in the island area, their survival water basically depends on the supply of fresh water b...

AI Technical Summary

Problems solved by technology

In order to reduce the influence of temperature polarization and concentration polarization, a mechanical stirring device was added to the previous membrane distillation device to destroy the influence of temperature polarization and concentration polarization in the distillation process on mass transfer and heat transfer, so as to improve the membrane flux. purpose, but the device increases the membrane flux while increasing the size and complexity of the membrane module, which not only increases energy consumption, but also increases the difficulty of disassembly and cleaning after use, resulting in an increase in the overall cost

[0009] At present, many membrane separation devices are not suitable for use in island areas due to their complex structure, large size, and inconvenient portability, and they do not make full use of solar energy resources, consume a large amount of electric energy, and have high costs.

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