Application of titanium tube in seawater desalination equipment
Heat conduction tube in seawater desalination equipment
The original heat conduction tube of seawater desalination equipment mainly used copper alloy tube. Due to many shortcomings of copper alloy tube, it has been replaced by titanium tube with high reliability and free from maintenance.
(1) Wall thickness of titanium tube
The wall thickness of the thermal conductivity pipe is determined by the service conditions, the tube plate material, the construction ability of the pipe expansion operation, the welding technology of the pipe end, etc. Due to the small diameter of the thermal conductivity pipe, the strength requirement is not high, so the actual use of thin wall thickness of the pipe, generally, copper alloy pipe is 0.9mm-1.2mm wall thickness.Use titanium tubes instead. Thin wall welded tubes with a wall thickness of 0.3mm may be used where corrosion is low.
2) Thermal conductivity of titanium tube
Due to different materials, thermal conductivity is also different. For example, titanium is 17W/(m·k), aluminum brass is lOOW/ (m·k), and 70/30 white copper is 29W/(m·k). Therefore, the thermal conductivity of the thermal conductive pipe can be controlled through the change of wall thickness.Of the above materials, titanium has the lowest thermal conductivity.If the thin-walled titanium welded pipe is used, although the thermal conductivity is worse than aluminum brass, it is comparable with 90/10 white copper and better than 70/30 white copper.
(3) Economy of titanium tube
Titanium pipe unit quality than copper alloy your 2-6 times, but from the consideration on the price, price of titanium tube can contend with copper alloy tube, due to the low density of titanium, wall thickness at the same time, the same length of titanium tube quality is only 50% of the copper alloy tube, when 50% of the wall thickness for copper alloy titanium tubes, the same heat transfer area of titanium tube quality was only about a quarter of copper alloy tube.According to the current price level, the overall price of using thin-walled titanium welded pipe is the same as that of aluminum copper pipe, which is cheaper than that of white copper pipe.It can be seen that the titanium tube is competitive in price.
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