Integral solar energy sea water desalination production apparatus

Abstract

The invention discloses an integrated solar energy overall production device for seawater desalting, comprising a heat collecting and diaphragm transferring distiller, a heat exchanger, a blower, a cyclone separator, a temperature sensor and so forth, the distiller consists of a connecting box, a vacuum tube plugged on the connecting box, a seawater input tube inside the vacuum tube and a saturate vapor output tube, the internal side wall of the vacuum is provided with a wet diaphragm; with using the utility model, the heat collecting temperature of solar energy can be controlled within a low heat range from 40 to 60 DEG C, the light-heat exchanging rate can be increased; the side wall at the upper end of the seawater input tube is provided with a water distribution hole, the seawater is sprayed to the wet diaphragm through the water distribution hole, so the processes of heat collecting, diaphragm transferring distillation and micro negative pressure distillation can be conducted simultaneously, a diaphragm distilling area of seawater can be increased, the invention solves the problems where the utilization rate of solar energy light-heat is lower, the production efficiency is low, the clear water is easy to be polluted., etc, the efficiency can be largely increased, the cost is decreased.

Description

technical field [0001] The invention relates to a solar seawater desalination device, in particular to a solar seawater desalination integrated production device integrating heat collection and falling film distillation, and belongs to the technical field of seawater desalination (salt water desalination) by solar photothermal technology. Background technique [0002] At present, human freshwater resources are extremely scarce, especially in islands and Kuchengshui areas. Although there are abundant seawater or Kuchengshui resources, they are seriously short of fresh water for production and living. The energy crisis and the environmental pollution caused by the use of fossil energy have prompted human efforts to develop and utilize clean energy such as solar energy and wind energy. Along with the development of solar heat collection technology, there have been technologies and devices for desalinating seawater (or brackish water) using solar energy resources. [0003] Pate...

AI Technical Summary

Problems solved by technology

There are some disadvantages in doing so: First, the photothermal conversion rate of solar energy decreases with the increase of temperature, especially when the heat collection temperature is higher than 60°C, the photothermal conversion efficiency will drop significantly, which is not conducive to the full utilization of solar energy Secondly, since the entire heat transfer process from heat collection to final heat distillation is completed through more than two devices, it is affected by factors such as the heat exchange efficiency of each device and the heat dissipation of the pipes used. resulting in lower overall heat utilization

Although the desalinator device synchronizes solar heat collection and seawater distillation, it needs to use a vacuum pump to pump the heating chamber of the heat collection tube into a high negative pressure, which requires a large power and consumes energy

Moreover, in the case of high vacuum, seawater boils in the heat collecting tube, which easily forms foam, overflows into the central tube, and pollutes the desalinated water

In addition, the actual evaporation area of ​​seawater in the heat collecting tube is only the cross-sectional area of ​​the annular jacket between the heat collecting tube and the central tube, and the evaporation area is narrow, resulting in a decrease in evaporation efficiency

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