Seawater desalination is still weak Key technology research is about to speed up
As of 2016, 131 seawater desalination projects have been completed nationwide, with a daily production scale exceeding 1.18 million tons. However, there is still a weak point in our desalination technology. Xin Hongmei, deputy director of the State Oceanic Administration's Science and Technology Department, said that next will give full play to key national specialties and "13th Five-Year Plan" the role of regional innovation in the development of the marine economy and other advantages, continue to support the key technologies for seawater research. The "2016 National Report on Seawater Utilization" released by the State Oceanic Administration on July 19 shows that as of the end of 2016, 131 seawater desalination projects have been completed in the country with a water production scale of 1,188,100 tons / day and the largest seawater Desalination project size of 200,000 tons / day. Desalinated water can drink? Compared with the international, China's sea water desalination technology at what level? Around these issues, the relevant responsible person made the answer. Desalinated water meets drinking water standards The Report shows that there are two main types of end-users of desalinated water: industrial water and domestic water. As of the end of 2016, the proportion of water used for domestic water projects accounted for 33.05%. "On this issue, I would like to say a few more about raising public awareness of water resources and awareness of seawater utilization and eliminating the public's concern about the use of seawater desalinated water as a source of drinking water." Qu Tanzhou, director of the Science and Technology Department of the State Oceanic Administration He said that people are currently having doubts about the utilization of seawater desalinated water, worrying about the lack of trace elements in the water and their long-term drinking affect human health. "Nowadays, all water quality indicators of desalinated water have reached the relevant provisions of our country's" drinking water health standards. "Quyang Universe stressed that drinking water is not a nutrient solution, and do not try to supplement trace elements by drinking water. Li Linmei, director of the Tianjin Seawater Desalination and Comprehensive Utilization Research Institute under the State Oceanic Administration, said that the nature's water cycle is actually the process of seawater desalination. The ocean is rich in freshwater, which accounts for about 97% of the total sea water. After the sun shines on the seawater, it evaporates and becomes freshwater in the form of rain, snow, cloud and mist, reuniting on the surface of the earth into rivers, lakes and seas. Desalination technology is to simulate the water cycle in nature. Data show that there are more than 300 water shortfalls in 657 cities in China. Coastal cities such as Tianjin, Dalian, Qingdao, Shanghai and Shenzhen are even more severely water-scarce. According to the plan of relevant departments, by 2030, even if the first two phases of the East Route of the South-to-North Water Diversion Project are completed and the first and second phases of the Central Line are completed and the utilization of part of the seawater is considered, the annual water shortage in the coastal areas in China will still reach 21.4 billion cubic meters. Desalination is considered an open source project to address the shortage of freshwater resources. Qu exploration universe, sea water desalination technology not only for seawater, but also dilute the brackish water inland areas, and has been serving in polar expeditions, ocean-going vessels. Cost is the bottleneck of promotion "Report" shows that in 2016 the cost of desalination and water production mainly concentrated in the 5-8 yuan / ton. Too high cost is one of the bottlenecks affecting the promotion of desalination. "We will try our best to reduce the cost through technical means." Li Linmei said that with technological progress, the overall cost of desalination in China has dropped by nearly 60% in the past 15 years. Li Linmei said that China has mastered reverse osmosis and low-temperature multi-effect distillation of desalination technology in China built Nissan 10,000-ton demonstration projects above, sets of desalination devices exported overseas. However, she also said that there are still some weak links in China's seawater desalination technology. The basic research is relatively weak. The research on the key materials, the core components themselves and the mechanism of cross-linking is not deep enough. Some technical bottlenecks have not yet broken through. There is a gap compared with similar products; lack of service platform to provide verification test for independent technology can not provide comparative experiments for autonomous technologies and international products, and promote continuous improvement and improvement of autonomous technologies; few large-scale engineering practice cases, international reputation Not good enough reputation. Xin Hongmei, deputy director of the State Oceanic Administration's Science and Technology Department, said that in the next step, it will give full play to the special funds of the state's key projects and special funds for science and technology projects and the model regional role for the innovation and development of the marine economy in the "13th Five-Year Plan" period. China will continue to support the key technologies of seawater utilization and seawater utilization Strategic, fundamental and forward-looking technology research and development, and comprehensively enhance the scientific and technological innovation capability of seawater utilization in China. According to the "13th Five-Year Plan" for seawater utilization in the country, by 2020, seawater utilization will achieve large-scale application, serialization of materials and key equipment will be realized, and the industrial chain will become more and more complete. The forging process over the recrystallization temperature of metal is called hot forging.Hot forging is also called hot die forging. 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