According to the research, in the seawater desalination project, titanium is the best metal material instead of copper, because titanium has the characteristics of small density, high specific strength, good corrosion resisting performance, good heat resistance and easy molding and so on, it has become the biggest rival of copper. However, in the past, because titanium is very expensive, except for the main sea water desalination projects with titanium of rich countries in the Middle East, the market is generally unbearable. Though the strong activity of titanium in above100 degrees sea water, easy to absorb the atomic state or molecular hydrogen, so that this will lead to hydrogen embitterment, its excellent performance is still better than copper. At present, titanium mainly applies in heat conduction pipe of seawater desalination equipment.
Multistage flash desalination device technology is mature, which has lots of advantages, such as large quantity of water, fresh water with high quality, desalination with low cost, wide application range, stable operation. What's more, the application of low grade heat energy of power plant improves the utilization ratio of energy, 78% of the world's freshwater water is made by evaporation. Northwest Research Institute of nonferrous metals, Beijing General Research Institute for nonferrous metals and other companies also have developed a series of ocean engineering corrosion resistant titanium alloy , such as Ti75, Ti31 and Ti631 etc.
In the aspect of performance, the advantage of titanium has emerged. In the aspect of technology, our country can basically have independent research and application. In the past, we always think that titanium is expensive, the use cost is high. Now, the price of sponge titanium is 50000 Yuan, and the price of titanium processing material has decrease, there is little difference compared with the copper price, and sometimes less than the price of copper, which created the dual advantages of performance and cost for titanium entered the field of seawater desalination. At the same time, the corrosion resistance of titanium is better than copper and other metals, so the service life cycle will naturally extend. Integrated multi factors comparison, the advantage that titanium went into the field of seawater desalination has fully showed. Open the "blue economy" of titanium in the ocean, to ease the waste of titanium resources caused by excess titanium production capacity, and the R & D of making full use of titanium has the market potential. in performance, cost and cycle.
Human can't leave away from water, the water crisis has already appeared, and the seawater desalination will become the main way to solve the human water. Titanium metal with high corrosion resistance performance will play a very important role in the "blue economy", and will bless human society.
