An embedded double-chimney solar seawater desalination system and its desalination method

Abstract

The invention discloses a double-chimney embedded type solar seawater desalination system and a desalination method thereof. A horizontally arranged heat collection shed is connected to an inner chimney, an inclinedly arranged linear Fresnel concentrating heat collector is in connection with an outer chimney, and the outer chimney is higher than the inner chimney. A wind turbine is disposed at the bottom of the inner chimney, a liquid distributor is arranged in the partition of the inner chimney and the outer chimney, and a condenser is disposed in the outer chimney. The horizontal heat collection shed is heated by solar energy to generate air flow, which drives the wind turbine at the bottom of the inner chimney so as to provide part of electric energy needed by the system. The linear Fresnel concentrating heat collector heats seawater to generate water vapor. The air flow in the inner chimney injects water vapor to flow to the condenser so as to be condensed into fresh water. The fresh water flows into a fresh water tank along the outer chimney wall, and high temperature strong brine flows into a horizontal heat collection shed bottom heat storage layer to store energy. The system provided by the invention has a compact structure, separates a power source and an energy source reasonably, can better use and manage solar energy, and improves the yield of fresh water.

Description

technical field [0001] The invention belongs to the technical field of seawater desalination, and relates to a solar thermal seawater desalination method, in particular to a solar seawater desalination system and a desalination method with embedded double chimneys. Background technique [0002] The per capita share of fresh water resources in my country is about 2200m 3 , 1 / 4 of the world's average level, is listed by the United Nations as one of the thirteen most water-deficient countries. Our country is a big ocean country with a long coastline, and we can use solar energy to desalinate seawater. There are more than 20 types of solar desalination technologies, and there are two main methods: one is to use solar power to drive the reverse osmosis process; the other is to use solar energy to generate heat to distill seawater to make it evaporate through phase change. The solar reverse osmosis method requires high-pressure pumps, reverse osmosis membranes, heat exchangers, ...

AI Technical Summary

Problems solved by technology

However, in these patents, the brine pool is directly arranged under the heat collection shed. When the solar energy heats the heat collection shed, a large amount of energy will be consumed in the evaporation of brine, thereby losing a lot of energy, and at the same time reducing the change in the density of the steam in the heat collection shed. , which in turn affects the airflow velocity into the chimney and reduces the freshwater production rate

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