Humidifying-dehumidifying water desalination system for agricultural greenhouses

Abstract

The invention discloses a humidifying-dehumidifying water desalination system for agricultural greenhouses, characterized in that from the humidifying-dehumidifying water desalination technology, a traditional agricultural greenhouse is reformed, a component is added to serve as an air humidifying chamber close to a natural low-temperature cold source; moist hot air is generated for the greenhouseto carry out heat exchanging and dehumidifying; fresh water is generated by condensing; the condensed fresh water is mixed with normal-temperature saline water that is subjected to heat exchanging toobtain low-concentration agricultural saline water; further, the agricultural saline water is efficiently utilized in organic conjunction with the drip irrigation technique to carry out drip irrigation; gas and liquid of the whole system are monitored via various meters and adjusted through a controller, so that self-monitoring cycle is achieved. The system adapts most existing greenhouses, is mainly powered from solar energy and has low building and operation costs. The system basically meets water production and consumption balance in the regions with fresh water deficiency and much salinewater easy to drain, so that zero to one is achieved for agricultural planting; therefore, virtuous ecological and economic cycle is achieved for a local place.

Description

technical field [0001] The invention relates to a brine desalination and application system, in particular to an agricultural greenhouse humidification-dehumidification type brine desalination and resource utilization system. Background technique [0002] Salt water such as seawater and brackish water is low-quality water resources that cannot be directly used or have low utilization value due to high salinity of the water body. The alkalinity is greater than the hardness of the water and contains a lot of salt. More than 70% of the world's population lives within 120 kilometers of the ocean; and more than 38 million people in rural China drink brackish water, which has always been a major issue for the national economy and people's livelihood. [0003] my country is rich in water resources, but fresh water is in short supply, seawater and brackish water resources are relatively large, and the degree of development and utilization is relatively low. According to preliminary...

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Problems solved by technology

[0006] However, the existing brine desalination method has high equipment, operation, and transportation costs, requires continuous investment, and is difficult to be widely used in areas rich in brine. At the same time, it cannot realize natural circulation and improve local ecology and economy.

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