Concentrated heating multi-effect heat recovery matrix air humidification and dehumidification solar seawater desalination device

Abstract

The invention discloses a condensation heating and multi-effect backheating matrix type air humidification and dehumidification type solar seawater desalination device which comprises a light receiver, a transparent shell, a ventilation and liquid collection device, a ventilating duct and a dehumidifier. The transparent shell is located in the middle of the device. Light rays reflected by a heliostat enter a humidification cavity through the transparent shell and irradiate the inner wall of the rod-shaped light receiver and the inner wall of the humidification cavity, light energy is converted into heat energy so that seawater can be evaporated through a falling film. Seawater enters a first-stage condenser and enters a second-stage condenser after exchanging heat with high-temperature and high-humidity air in a dehumidification cavity. Most of seawater is sprayed to the surface of the receiver through a first-stage dehumidification cavity to form a water film with the large specific surface area, a small part of seawater is sent to a fourth-stage evaporation cavity to be sprayed, and circulation seawater is supplemented. Seawater on the surface of the receiver is heated by sunshine and evaporated to exchange heat and moisture with air flowing from bottom to top, saturated moist air is conveyed to the dehumidification cavity through a draught fan and is condensed into fresh water through fed sweater, and finally the fresh water is collected and conveyed to users through the ventilation liquid collection device.

Description

technical field [0001] The invention relates to a device for directly using solar energy to humidify and dehumidify and extract fresh water, and belongs to the technical fields of solar heat utilization, seawater desalination and water treatment. Specifically, it relates to a tower-type concentrating multi-effect heat recovery matrix type humidification and dehumidification solar seawater desalination device. Background technique [0002] Using solar energy to desalinate seawater is energy-saving and environmentally friendly, so it is highly praised by people. The humidification and dehumidification type seawater desalination process separates the heating, evaporation and condensation processes, so that targeted technologies can be used to strengthen each process and improve the energy utilization efficiency of each process. At the same time, it also has the advantages of simple control, stable water production, and normal pressure. , low energy consumption, easy to combine...

AI Technical Summary

Problems solved by technology

[0004] Application No. 201310411226.6 discloses a tandem multi-stage isothermal heating multi-effect reheating humidification dehumidification seawater desalination machine. Due to the existence of heat exchangers, there are many heat transfer links between the solar heat collection system and the seawater desalination system, thereby reducing Heat collection efficiency

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