Automatic solar film distillation seawater desalting device

Abstract

The invention discloses an automatic solar film distillation seawater desalting device. A solar heat collector contained in the device is a vacuum solar heat collector composed of a light transmission cover, a light absorbing corrugated plate, a peripheral sealing element with certain thickness and the like; the lower surface of the light absorbing corrugated plate, a hydrophobic microporous film, the sealing element with certain thickness on the periphery, a microporous filter, an automatic exhaust valve and the like form a seawater desalting chamber; the lower surface of the hydrophobic microporous film, a corrugated radiating plate, the sealing element with certain thickness on the periphery, the automatic exhaust valve and the like form a fresh water cooling chamber; and a flexible water bag communicated with the fresh water cooling chamber is attached to the exterior of the fresh water cooling chamber. The device can stably obtain fresh water without human intervention by using the vacuum solar heat collector and a balancing block to float on the sea surface and using static pressure of seawater and sea wave impact to automatically supply clean seawater. The device can be anchored in a reef island water area, can also be drawn together with a ship, and provides fresh water for production and living for reef island and shipping personnel.

Description

technical field [0001] The present invention relates to the technical field of membrane distillation seawater desalination, in particular to a method of converting solar light energy into heat energy to heat seawater to increase the partial pressure of steam in seawater, and at the same time use seawater in the marine environment to cool fresh water to reduce the partial pressure of steam in the fresh water. An automatic solar membrane distillation seawater desalination device that constitutes the driving force of the direct contact membrane distillation seawater desalination process and does not require human power and intervention. technical background [0002] With the expansion of human activities to the depths of the ocean, whether it is ocean shipping or island development, people urgently need to get rid of the shackles of relying on land for fresh water supply, and desire to obtain directly from the ocean economical, effective and concise resources for human productio...

AI Technical Summary

Problems solved by technology

[0004] Since the concept of membrane distillation was proposed in the 1960s, membrane distillation technology has formed four main forms: direct contact membrane distillation, air-swept membrane distillation, air-gap membrane distillation and vacuum membrane distillation. Energy issues and integration with solar technology: For example, there are six Chinese invention patents and more than 20 European patents involving membrane distillation and solar energy, but all of them have affected the promotion and application of their technologies due to their own defects

For example, in the disclosed CN100340492C device, it is not only necessary to set up a pump or artificially continuously replenish seawater to ensure effective contact between the heat collecting plate and the seawater in the seawater container, but also with the increase of freshwater in the freshwater container, the depth of the floating device immersed in seawater will gradually increase. increase, coupled with the fact that the membrane is directly used as the container wall while no corresponding measures are taken to maintain a 1mm gap between it and the cooling plate, which brings difficulties to the implementation

[0005] Although many seawater desalination technologies and equipment have been well-applied on land on a large scale, they are not suitable for the compact structure required by people's production and life on the sea or on islands and reefs due to their complex structure, bulky size, and cumbersome operations. , economical feasibility, simple operation and other characteristics

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