Fujian Dongshan uses solar energy to desalinate seawater

“Using wind energy and solar energy to desalinate seawater on this island can produce more than 20 tons of fresh water per day, solve the water problem, and meet the needs of tourist service centers and 500 tourists for daily life.” Recently, Dongmen County New Energy in Dongshan County was independently The on-site demonstration project of seawater desalination in power grids was introduced by Zhang Zihu, an engineer of the China Institute of Water Resources and Hydropower Research.

Dongmen Island covers an area of ​​1 square kilometer and is one of China's four famous islands. It is also the first batch of provincial-level scenic spots announced by the state-level forest park and the Fujian provincial government. However, in the past, the island could only rely on diesel engines to generate electricity and transport freshwater. Drinking water is difficult.

In December 2010, the China National Institute of Water Resources and Hydropower Research undertook the demonstration project of “Independent Wind Power Seawater (Brackish Water) Desalination Technology”, a research project of the Ministry of Water Resources’s public welfare industry, and it was implemented on the East Gate Island. The total investment of the project is more than 1.3 million yuan. Three wind turbines are installed, each with 5000 watts; 5000 watts of solar energy is installed and 20 tons of desalinated water is produced daily. Implementation of wind and solar power supply, usually using wind energy to desalinate sea water, less wind power in the summer, they use solar power to ensure desalination of water has sufficient power. The project completed installation and commissioning in March 2011. It has been operating for more than a year to solve the problem of drinking fresh water and electricity for employees and tourists. “In the off-season, water is not used up. We use water to cook vegetables and water the trees.”

Engineer Zhang Zi-hu said that Dongmenyu, Dongshan County, “Desert Operation Project for Desalination of New Energy Independent Power Grid” is the first project implemented by the China Institute of Water Resources and Hydropower Research in the country. Its demonstration operation has been successful, and the next stage will be on the coast. Island promotion.

In Dongmen Island, Fujian Fisheries Research Institute also set up a wind energy desalination test base. At Jinfengwan Breeding Base in Qixia Village, Chencheng Township, Dongshan County, the author saw a total investment of more than 500,000 yuan in “R&D of wind energy desalination plant and demonstration project of cage culture area” installed on cages of fish farmers Chen Mingyi. Taiwan’s 3000-watt wind turbines use offshore wind power to provide power, with a daily output of 10 tons of desalinated water to meet the daily water needs of more than 200 production and management staff around them.

Chen Mingyi said that this project benefits the people and uses the desalinated water quality is also relatively good, but due to the large investment, high cost, and close to the village, the farmers are not allowed to invest in desalination, and are accustomed to buying the county. Water supply company's tap water.