The application of titanium materials in seawater desalination equipment is diverse and essential due to their excellent corrosion resistance and durability. Here are the main methods:
1. Heat Pipes in Seawater Desalination Systems
Traditionally, heat transfer tubes in desalination units were made from copper alloys. However, these materials have limitations such as poor corrosion resistance and frequent maintenance requirements. As a result, titanium tubes have become the preferred choice, offering higher reliability and longer service life in harsh marine environments.
2. Ventilation Condensers and Injection Compressors
A notable example is the 2,650 ton/day desalination plant built by Songdo Carbon Mine Co., Ltd. in 1967 in Japan. In this system, both the ventilation condenser and the 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, proving the effectiveness of titanium in such applications.
3. Condensers in the Heat Release Section
In multi-stage flash (MSF) desalination systems, seawater is used as cooling water to condense vapor from each stage. Due to the presence of sand and marine organisms, copper alloy tubes often suffer from fouling and corrosion. To address this, titanium tubes are widely used in the condensers of MSF systems. Additionally, when oxygen must be injected to kill bacteria in seawater, the corrosion resistance of titanium makes it the ideal material for such operations.
4. Condensers in the Heat Recovery Section
The heat recovery section typically has a large heat transfer area. For cost-effectiveness, copper alloy tubes are commonly used. However, in special cases where the medium contains corrosive substances like ammonia or hydrogen sulfide, titanium tubes are preferred to prevent damage and ensure long-term performance.
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 to remove colloidal impurities through coagulation and sedimentation. Its chemical stability and resistance to degradation make it a valuable component in power plant water treatment systems.
Seawater desalination is a critical technology in many countries, especially in regions with limited freshwater resources. The United States and Japan are among the leading producers of desalination plants globally, continuously advancing the use of advanced materials like titanium to improve efficiency and longevity.
Stay updated with the latest developments in desalination technology.
Tag: Titanium Material, Desalination Equipment
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