System and method for desalinating seawater through absorbing solar energy via liquid-solid fluidized bed

Abstract

The invention discloses a system and a method for desalting seawater through absorbing solar energy via a liquid-solid fluidized bed, belonging to the field of solar-powered seawater desalination technologies. The system comprises a solar spotlighting device, the liquid-solid fluidized bed, a pump, a compressor, a preheater, a filter, a gas-liquid separator and a liquid storage tank, wherein the solar spotlighting device is used for and directly irradiating the sunlight into the liquid-solid fluidized bed after focusing the sunlight, absorbing the solar thermal radiation by utilizing solid particles and heating the seawater in the liquid-solid fluidized bed; after being compressed, the pressure and the temperature of the water vapor generated in the liquid-solid fluidized bed rise, and the water vapor enters into the preheater to preheat the seawater which is about to enter into the liquid-solid fluidized bed; and after condensation, fresh water is obtained. The system provided by the invention is operated at normal pressure; and according to the system, the solar thermal radiation is absorbed by utilizing the solid particles with high absorptivity in the liquid-solid fluidized bed, and the evaporation efficiency of the seawater is improved at the same time by utilizing the efficient heat exchange between the liquid and the solid in the liquid-solid fluidized bed.

Description

technical field [0001] The invention relates to a system and method for seawater desalination by using solid particles to directly absorb solar energy as a heat source, and belongs to the field of solar seawater desalination. Background technique [0002] Currently, the most widely used seawater desalination technologies include multi-stage flash evaporation, multi-effect evaporation and reverse osmosis. These methods all consume a large amount of fuel and power resources. Desalination of seawater by using solar energy, a renewable energy source, can avoid energy and environmental problems caused by the consumption of a large amount of fuel and electric power resources. Contents of the invention [0003] The problem to be solved in this patent is to provide a method for efficiently using solar energy to desalinate seawater, so as to solve the problems of high cost and low efficiency of seawater desalination at the present stage, reduce environmental pollution, and improve...

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Problems solved by technology

[0003] The problem to be solved in this patent is: to provide a method for efficiently utilizing solar energy to desalinate seawater, so as to solve the problems of high cost and low efficiency of seawater desalination at the present stage, reduce environmental pollution, and improve the ability to utilize solar energy

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