Back self-storage multi-stage solar still

Abstract

A back self-storage multi-stage solar distiller relates to a device that uses solar energy to heat seawater to produce pure water, which includes a vacuum tube solar heat collector, a hot water storage tank, an evaporation and condensation chamber, a brine tank, etc.; the vacuum tube The solar collector collects sunlight to provide heat for the fresh water in the hot water tank, and the heat is transmitted to the first-stage evaporation and condensation chamber through the wall of the hot water tank, where it first heats the seawater in the brine tank outside the tank wall to generate evaporation. The steam condenses on the inner side of the outer wall of the first-stage evaporation and condensation chamber to produce fresh water, and the latent heat released by condensation is used to heat the seawater in the brine tank in the second-stage evaporation and condensation chamber, resulting in re-evaporation, which in turn transfers the heat to the outside step by step. stage produces fresh water. The bottom plate of the device is arranged with a salt water, fresh water separation plate, and a salt water and fresh water output pipe is also arranged to avoid mixing of salt water and fresh water. The device adopts a multi-stage evaporation and condensation chamber structure, which reuses heat and improves water production efficiency and energy utilization.

Description

technical field [0001] The invention relates to a back self-storage type device for producing fresh water by utilizing solar energy, in particular to a multi-stage solar distiller that utilizes vacuum tube solar collectors to supply heat and desalinize seawater, belonging to the technical field of new energy applications. Background technique [0002] Seawater desalination is an important way to solve the shortage of fresh water resources. At present, the technologies for producing pure water mainly include reverse osmosis membrane method and distillation method, both of which are at the expense of consuming irreplaceable energy. Electric energy, the traditional distillation method requires a lot of heat energy, and the utilization rate of heat energy is low and the economy is poor. Faced with the increasingly serious problem of energy shortage, the use of solar energy for seawater desalination can solve the problem of insufficient energy in some areas to a certain extent. ...

AI Technical Summary

Problems solved by technology

At present, the solar desalination system has the disadvantages of excessive investment cost and low energy utilization rate.

A comprehensive analysis of the reasons for the low freshwater production mainly includes: insufficient utilization of the latent heat of condensation, large heat capacity of seawater to be evaporated, etc.

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