Elliptical Carbon Steel Coal Economizer Boiler Type Finned Tube 

Elliptic finned tube is the cooling element of direct air cooler tube bundle. Because of the particularity of direct air cooler using environment, so it is necessary to have good anti corrosive processing on the surface of air cooler. In order to improve the service life of air cooler, hot dip zinc is used on the surface of Elliptic finned tube anti-corrosion. The quality requirements of Elliptic finned tube hot-dip zinc, not only contains the general requirements of hot-dip zinc parts leaching zinc quality, but also contains the elliptical finned tube as the special requirements of cooling element leaching zinc quality. The characteristics of hot-dip zinc coating is that the protective effect on the surface of the substrate of hot dip galvanized steel is much better than a paint or plastic layer. During hot dip zinc, zinc and iron- steel has spread to produce a metallic compound layer which is called layer alloy. Alloy layer has multilayer structures, and the chemical compositions of which are Fe3Zn10 or Fe5Zn21, FeZn7, FeZn13, and etc. Alloy layer and steel as well as alloy and pure zinc layer is called metallurgical combination.

Features: Elliptical pipe of reflux zone and the windward area is much smaller, effectively reduce the air side Liu Dongli, reduce energy consumption; At the same time when the number of tube bundle, oval tube than the circular tube structure is more compact, heat exchanger of smaller volume, lower cost.

One of reference drawing:

Applications: Petroleum chemical industry heating furnace convection chamber application of Stud Fin Tube, can increase the heat transfer coefficient of gas side, and the area of stud is 2 ~ 3 times of the straight tube. Due to the application of the Stud Fin Tube, the same thermal strength can be obtained with the same radiation in the design of the case.

It use the power winding technology, from stable, segment combination and firm, according to different applications can be galvanized surface and nickel-based brazing. Has high heat transfer efficiency, and the wind side the characteristics of small resistance, compared with the same cross section of the circular tube, the heat transfer coefficient can be increased by 25%, about air resistance can reduce about 15-25%.