The application methods of titanium materials on seawater desalination equipment are as follows:
(1) Heat pipe in seawater desalination equipment
The heat transfer tubes of seawater desalination equipment were mainly made of copper alloy tubes. However, due to many shortcomings of copper alloy tubes, they have been replaced by titanium tubes with high reliability and maintenance.
(2) Ventilation condenser and injection compressor
Japan's real desalination equipment is a 2,650 ton/day seawater desalination plant built by Songdo Carbon Mine Co., Ltd. in 1967. The ventilation condenser and the heat transfer tube and the tube sheet of the injection compressor cannot be made of copper alloy due to corrosion of seawater, and there is no failure due to corrosion after being replaced with a titanium tube.
(3) Condenser of the heat release part
The multi-stage flash condenser uses sea water as cooling water to cool the water vapor generated by the flash chambers of the various stages. Since the sand and sea organisms mixed in the seawater are easily attached in the heat transfer tubes and the tube ends, the copper alloy tubes are eroded. Therefore, titanium tubes are used on the heat transfer condensers of almost all multi-stage flash type seawater desalination equipments, especially in order to kill bacteria in seawater, and it is necessary to use corrosion resistance when oxygen has to be injected. Titanium tube.
(4) Condenser of heat recovery section
The heat transfer area of ​​the heat recovery unit has a large heat transfer area. For economic reasons, copper alloy tubes are usually used, and titanium tubes are used only for special occasions. For example, copper alloy tubes can be severely corroded in media containing contaminants such as ammonia or hydrogen sulfide, and titanium tubes are used in this case.
(5) Desalination device for power plant boiler water
Titanium equipment and titanium anodes are ideal materials for both electrodialysis desalination and distillation desalination. Titanium dissolution tanks and heaters have also been successfully used in a system for removing colloidal impurities from water by coagulation sedimentation.
In foreign countries, the main producers of desalination plants are the United States and Japan.
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Tag: Titanium material Desalination equipment
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