Saline-alkali water desalination circulating system based on microgrid power supply and application

Abstract

The invention discloses a saline-alkali water desalination circulating system based on microgrid power supply. The system comprises a water taking subsystem, a filtering subsystem, a thermal evaporation subsystem, a salt drying system, a micro-grid system and a process control system. Salt and transpiration condensation water in saline-alkali soil are effectively separated through solar photothermal, and water resource conversion, salt transfer and comprehensive utilization are achieved. The water taking subsystem is mainly used for taking water from a field pool; the filtering subsystem is used for primarily separating salt from water through a nanofiltration membrane system and a reverse osmosis membrane system; the thermal evaporation subsystem is used for heating the concentrated saline-alkaline water through solar energy; the salt drying system is used for separating out crystalline salt from the heated strong brine through airing; the microgrid system is responsible for providingelectric energy supply for the whole system through photovoltaic power generation. The system can be used as one of important ways for relieving water resource shortage and improving saline-alkali soil and has important significance for improving the life quality of people in arid regions and improving the ecological environment of desert arid regions.

Description

technical field [0001] The invention relates to the field of micro-grid engineering application and ecological saline-alkali water desalination, in particular to a saline-alkali water desalination circulation system based on micro-grid power supply. Background technique [0002] The shortage of fresh water resources in arid areas has become a serious problem for many countries, and may even lead to war. In parts of the west and north of my country, the annual precipitation is extremely limited, and the climate is extremely arid. In some areas, the annual rainfall is even less than 100mm. Water shortage, soil salinization and land desertification are three prominent problems that threaten the survival of local residents. At present, my country's agricultural water use department has begun to consider the recycling of saline-alkali water in desertified areas to alleviate the drought pressure and the increasing water supply contradiction. Insufficient understanding of the pros ...

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Problems solved by technology

[0003] The purpose of the present invention is to address the deficiencies of the prior art, to provide a saline-alkali water desalination cycle system based on micro-grid power supply, to alleviate the drought pressure and the increasingly aggravated water supply contradiction, and to solve the shortage of fresh water resources in drought and land salinization areas question

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