The application of titanium materials in seawater desalination equipment has become increasingly important due to their superior corrosion resistance and durability in harsh marine environments. Here are the key methods of using titanium in such systems:
1. Heat Pipes in Desalination Systems
Traditionally, heat transfer tubes in desalination equipment were made from copper alloys. However, these materials often faced issues like corrosion and reduced efficiency, especially when exposed to seawater. As a result, titanium tubes have been widely adopted for their high reliability, long service life, and excellent resistance to seawater corrosion.
2. Ventilation Condensers and Injection Compressors
A notable example is Japan's 2,650-ton-per-day desalination plant built by Songdo Carbon Mine Co., Ltd. in 1967. In this system, the ventilation condenser and injection compressor could not use copper alloy components due to severe corrosion from seawater. After replacing them with titanium tubes, no corrosion-related failures were reported, demonstrating the material’s effectiveness in critical applications.
3. Condensers in the Flash Evaporation Process
In multi-stage flash (MSF) desalination systems, seawater is used as cooling water to condense vapor from each stage. The presence of sand and marine organisms can cause fouling in heat transfer tubes and tube sheets. Copper alloys are prone to erosion under such conditions, which is why titanium tubes are now commonly used in almost all MSF systems. Additionally, when oxygen is injected to kill bacteria in seawater, titanium’s corrosion resistance makes it the preferred choice.
4. Heat Recovery Condensers
The heat recovery section in desalination systems typically involves a large heat transfer area. For cost-effectiveness, copper alloy tubes are often used. However, in environments containing contaminants like ammonia or hydrogen sulfide, copper alloys may suffer severe corrosion. In such cases, titanium tubes are employed to ensure long-term performance and reduce maintenance costs.
5. Desalination Equipment for Power Plant Boiler Water
Titanium is an ideal material for both electrodialysis and distillation-based desalination systems. It is also used in dissolution tanks and heaters for removing colloidal impurities through coagulation and sedimentation processes. Its chemical stability and resistance to degradation make it highly suitable for high-purity water treatment applications.
Seawater desalination technology is well-developed in countries like the United States and Japan, where advanced materials such as titanium are extensively utilized to improve efficiency and longevity of desalination plants.
Stay informed about the latest developments in desalination technology.
Tag: Titanium Material, Desalination Equipment
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