Solar heat-focusing capillary-driven multi-stage seawater desalting system

Abstract

The invention discloses a solar heat-focusing capillary-driven multi-stage seawater desalting system. The solar heat-focusing capillary-driven multi-stage seawater desalting system comprises a heat focusing device, a heat conducting core and a multi-stage evaporating and condensing integrated cavity device, wherein the heat focusing device comprises a housing, a transparent skylight is formed in the top of the housing, and a through hole is formed in the center of the bottom end of the housing; the heat conducting core is divided into two parts, the upper part is a heat collector shaped like adisc, and high-absorption low-emitting-rate light absorbing coating is plated on the disc, the bottom of the disc is connected with a heat conducting rod, the heat conducting rod passes through the bottom of the housing, the heat conducting rod which exceeds the housing covers a capillary water-supplementing material; the multi-stage evaporating and condensing integrated cavity comprises a multi-stage condensing and evaporating integrated wall surface, a seawater compensating cavity, a condensed water conveying pipeline, a condensed water collecting cavity and a heat-sink module. The solar heat-focusing capillary-driven multi-stage seawater desalting system realizes recycling for low-grade steam generated by solar energy, multi-stage recycling of steam condensing latent heat greatly improves the energy conversion efficiency of the system and greatly increases a water yield; a multi-stage nested steam phase-change potential heat recycling system is designed; meanwhile, a vertical structure and a way of enlarging a condensing surface stage by stage are adopted, so that the steam condensing rate and condensed water recycling are greatly enhanced.

Description

technical field [0001] The invention relates to the technical field of seawater desalination, in particular to a multistage seawater desalination system driven by solar heat focusing capillary drive. Background technique [0002] The severe shortage of clean fresh water resources has become one of the most pervasive global problems. In the past few decades, seawater desalination technology has been greatly developed, among which multiple-effect distillation, multi-stage flash evaporation and reverse osmosis have been applied on a large scale in engineering. However, the traditional seawater desalination technology requires high investment and high energy consumption, and the energy consumed mainly comes from fossil fuels such as oil and coal, which causes new pollution in the process. [0003] At present, solar energy is the most accessible and environmentally friendly clean energy on earth. Under standard conditions, the solar power received by the earth's surface is 1000...

AI Technical Summary

Problems solved by technology

At the same time, due to the low grade of hot steam generated by solar energy, it is difficult to be effectively utilized

The existing solar desalination measures to collect fresh water are obtained by directly exchanging low-grade steam with the environment and condensing it, resulting in serious energy waste

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