Floating sea water desalination film with backheating capillary action

Abstract

The invention discloses a floating sea water desalination film with the backheating capillary action, and belongs to the technical field of solar energy heat collection and sea water desalination. The film comprises an upper layer transparent film, a middle layer transparent film, a lower layer transparent film, a distillation film, a black capillary tube and a temperature-resistant waterproof sealing rubber layer. The upper layer transparent film and the middle layer transparent film are filled with sea water to form a big-small biconvex lens structure. Vertical incidence light sequentially passes through the big convex lens on the upper layer and the small convex lens on the middle layer, converged light penetrates through the lower layer transparent film, and finally a focus is formed on the distillation film at the bottom layer. Sea water below the film is continuously heated, and the temperature of the lower side is raised continuously while the temperature of the upper side is low. Under the action of steam pressure difference at the two sides of the film, the sea water passes through film holes in a steam form, and the steam is diffused from the hot side to the cold side. The steam entering the space transmits vaporization heat to the wall face of the black capillary tube to reuse the vaporization heat. Oblique incident light will move to the wall face of the black capillary tube from the focus, fresh water evaporating from the upper end of heated capillary tube is condensed and collected between the middle layer transparent film and the lower layer transparent film.

Description

Technical field [0001] The invention relates to a device for directly heating the surface layer of a distillation membrane by using concentrated solar energy to continuously increase the temperature of seawater on the other side of the membrane, and to condense fresh water from gaseous water molecules through the distillation membrane. The utility model belongs to the technical fields of solar heat utilization, seawater desalination and water treatment. In particular, it relates to a floating seawater desalination device with regenerative capillary action. Background technique [0002] Since the advent of the nautical age, humans have invented different forms of small floating seawater desalination devices for self-rescue at sea. Every year around the world, many ships sink at sea due to various reasons. In the past when membrane technology was not very developed, seawater desalination directly using solar energy at sea became the only feasible way to obtain fresh water. ...

AI Technical Summary

Problems solved by technology

[0006] (1) The existing device is inconvenient to carry, and the seawater stock is not large

[0007] (2) The combination of solar energy concentration and seawater desalination is not used, and the overall energy utilization rate is low

[0008] (3) Failure to unitize to form a huge offshore freshwater collector, so that low cost and scale cannot be achieved, and it is not suitable for the huge demand for freshwater in modern marine agriculture

[0009] Although there are many solar desalination technologies and equipment that have been applied on land on a large scale, they are not suitable for direct use at sea due to complex structures, large volumes, and cumbersome operations.

Images