Ejection type solar seawater desalination device

Abstract

The invention relates to an ejection type solar seawater desalination device. The solar energy is used as a heat source, seawater enters a hot water tank after being heated to a certain temperature and then enters a flash chamber with negative pressure maintained by an ejector to carry out flash evaporation, and water vapor is condensed twice by a condenser to obtain a great deal of fresh water, thus, the aim of maintaining the negative pressure in the flash chamber is achieved by ejecting normal-temperature seawater; the seawater is not needed to be heated to higher temperature in a solar heater due to the existence of negative pressure of the flash chamber, thus, the solar heater can still work under the condition that the illumination intensity is not very strong, and the efficiency of the device is correspondingly increased along with the increment of the illumination intensity; and through flash distillation of hot seawater in the flash chamber, not only is the evaporated quantity of the seawater increased, but also heat loss caused by temperature difference of heat exchangers is eliminated, and the energy utilization ratio is increased.

Description

technical field [0001] The invention belongs to the field of seawater desalination, and in particular relates to an ejector-type solar seawater desalination device which utilizes solar energy and jet flow technology to realize seawater desalination. Background technique [0002] my country is a country suffering from drought and severe water shortage. Although my country's total fresh water resources account for 6% of the world's water resources, the per capita share is only 1 / 4 of the world's average level. Facing the increasing contradiction between supply and demand of fresh water, making full use of seawater resources is a good solution. [0003] Due to the importance of seawater desalination, relevant researchers have successively proposed many methods, such as distillation, reverse osmosis, electrodialysis, ion exchange, etc., these methods generally need to consume a lot of fuel and electricity; solar energy is a Renewable and clean energy, the application of solar e...

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Problems solved by technology

[0004] Solar seawater desalination technology is basically carried out under ambient pressure, and some use jet steam to absorb steam, etc. These methods not only require the fluid to be heated to a higher temperature, but also to be heated through a heat exchanger, which limits the use of solar energy conditions, resulting in inefficient energy use and low freshwater production

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