A seawater desalination device implanted in a wind power tower

Abstract

The invention relates to a sea water desalting plant implanted into a wind power tower, and belongs to the field of sea water desalination. The sea water desalting plant comprises an evaporator. A porous barrier partitions the evaporator into an upper steam cavity and a lower sea water cavity. The porous barrier is a hydrophilic thermal insulation porous medium, the inner pore diameter is that of a micrometer hole, and the upper side of the porous barrier is coated with a heat absorption coating. The steam cavity is sequentially connected with a condenser, a condensation tank and a fresh water tank through a pipe. One end of the sea water cavity is connected with a sea water pipe to be used for water inputting, and the other end of the sea water cavity is connected with a salt pipe to be used for water outputting. Heat exchange is conducted on the sea water pipe and the salt water pipe through a heat exchanger, and an outlet of the salt water pipe is connected with a piston type water pump to pump out salt water. The center of the porous barrier and the center of the condensation tank are 10 meters away from the sea level in height. By means of the sea water desalting plant, stable and long-time sea water desalting can be achieved without inputting external power and electricity, the thermal utilization efficiency is high, and an effective path is provided for emergency water for ocean working, help seeking and the like or large-scale water contributing.

Description

technical field [0001] The invention relates to a seawater desalination device embedded in a wind power tower, belonging to the technical field of seawater desalination. Background technique [0002] With the rapid development of society and the continuous improvement of urbanization level, the whole world is facing a serious shortage of fresh water resources. Water resource issues have become global issues. [0003] Traditional thermal seawater desalination, including flash evaporation and distillation, generally has a concentration ratio of about 2, that is, 1Kg of fresh water needs to be discharged at the same time as 1Kg of brine. In this method, the seawater is heated and boiled in the evaporator to generate steam, while the concentrated brine is discharged at a temperature close to the steam temperature, and the discharge of the concentrated brine takes away a large amount of sensible heat. When the boiling temperature is 70°C, the brine discharge temperature is also...

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Problems solved by technology

[0006] Chinese patent application number 201410178303.2 discloses a capillary evaporation seawater desalination membrane, which is filled with gas to make the whole device float on the sea surface, but the fresh water produced by it is adsorbed in the porous material, and requires secondary work to remove the fresh water

Moreover, these patents directly use solar energy to radiate to the surface of capillary porous media. The pressure in the evaporation chamber is atmospheric pressure, and the boiling point reaches 100 ° C. It is easy to scale, and the high operating temperature will cause large heat loss to the environment, and its thermal efficiency is very low.

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