High-altitude seawater desalination system and seawater desalination method based on airship

The invention discloses an airship-based high-altitude seawater desalination system and seawater desalination method, and relates to the technical field of seawater desalination, the airship-based high-altitude seawater desalination system comprises an airship unit, a power unit and a seawater desalination unit; the airship unit comprises an airship main body, a pod and a flexible photovoltaic array; the power unit is arranged in the pod and is electrically connected with the flexible photovoltaic array; the seawater desalination unit comprises a seawater storage tank, a heat exchanger, a low-pressure evaporation module, a fresh water storage tank and a high-concentration saline water storage tank, and the low-pressure evaporation module evaporates seawater at low temperature by utilizing a high-altitude low-pressure environment to generate water vapor and separate out salt. The high-altitude natural low pressure is ingeniously utilized, the main energy consumption of the system is greatly reduced, the efficient latent heat recovery design is adopted, the energy utilization efficiency is high, solar energy serves as energy, and the operation energy consumption is very low. The airship unit can hover at the high altitude, has high maneuverability and can be quickly deployed to coastal water-deficient areas according to requirements. And the problem of direct discharge of the high-salt concentrated water is fundamentally avoided.