Fresh water collecting and supplying system

Abstract

The invention relates to a fresh water collecting and supplying system, comprising a water inlet pipe, a heat energy supply device, a distilling device, a rainwater collector and a fresh water collector, wherein the heat energy supply device is respectively connected with the water inlet pipe and the distilling device, the fresh water collector is connected with the distilling device, seawater from the water inlet pipe is heated by the heat energy supply device and then introduced into the distilling device for multi-effect distilling and condensing, and fresh water converted from the seawater is introduced into the fresh water collector; and the rainwater collector is connected with the fresh water collector and is used for delivering collected rainwater into the fresh water collector. According to the invention, circulating water is heated by using a heat collector in sunny days, the circulating heated water supplies heat for the vertical type multi-effective distilling device to produce fresh water through a circulating pump; and the rainwater is collected by using a reflecting plate arranged below the heat collector in rainy days and is subjected to depth-type filtration and purification to obtain the fresh water, so that the fresh water can be collected both in sunny days and rainy days, the supply level of the fresh water is increased; and the fresh water collecting and supplying system is particularly suitable for districts which are rich in solar energy and lack of fresh water resources.

Description

technical field [0001] The invention relates to the technical fields of seawater desalination and rainwater utilization, and in particular to a freshwater collection and supply system based on vertical downstream multi-effect distillation seawater desalination technology and rainwater collection and purification technology based on solar energy providing heat. Background technique [0002] The existing active solar seawater desalination technologies include thermal method and electrical method. Among them, thermal method seawater desalination technology uses solar heat directly through solar collectors, and thermal method seawater desalination technology includes multi-stage flash evaporation, multi-effect Distillation, thermal distillation membrane and other technologies; electric seawater desalination technology converts solar energy into electrical energy through photovoltaic cells, and electric seawater desalination technology includes electrodialysis, reverse osmosis and...

AI Technical Summary

Problems solved by technology

[0003] However, the existing seawater desalination technologies are all single use of seawater desalination, that is, only use solar energy to produce fresh water from seawater in sunny days, and solar desalination devices cannot work in rainy days.

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