Capillary-driven multi-stage seawater desalination system with solar thermal focus

Abstract

The invention discloses a multi-stage seawater desalination system driven by solar heat focusing capillary, comprising: a heat focusing device, comprising: a shell with a transparent skylight at the top and a hole at the center of the bottom; a heat conducting core divided into two parts, the upper part It is a plate-shaped heat collector, the plate is coated with a light-absorbing coating with high absorption and low emissivity, the bottom of the plate is connected with a heat conduction rod, the heat conduction rod passes through the bottom of the shell, and the heat conduction rod beyond the shell is wrapped with capillary water replenishing material; multi-stage evaporation and condensation integration chamber The body device includes: a multi-stage condensation and evaporation integrated wall, a seawater compensation chamber, a condensed water delivery pipeline, a condensed water collection chamber, and a heat sink module. The invention realizes the recovery and utilization of low-grade steam generated by solar energy through the thermal focusing method, and the multi-stage recovery of steam condensation latent heat greatly improves the energy conversion efficiency and water production of the system, and a multi-level nested steam phase change latent heat recovery system is designed; at the same time , using a vertical structure and gradually expanding the condensing surface, greatly enhancing the steam condensation rate and condensed water recovery.

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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