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Anti corrosion and multi heat transfer mode of finned tube heat exchanger
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In the process of using the finned tube heat exchanger, a very important link is to prevent corrosion. So in order to prevent such a phenomenon, some corrosion-resistant materials are used in the production process, such as some stainless steel, aluminum alloy, etc., which have relatively good corrosion resistance.

 

Effectively improve the service life of the heat exchanger. However, the cost of using such materials is generally relatively high, so the price of the purchase is also higher than the price. Some corrosion inhibitors are used. In the corrosive medium, a small amount of material is added to greatly reduce the corrosion performance of the metal, and then it is stopped. It is also some of the corrosion inhibitors we use.

 

Electrochemical protection is used for the protection of the cathode and anode, the protection of the cathode DC power supply and the protection of the metal surface anode. The power consumption used in this way is very large, and the cost is naturally very high. It is protected by the external power supply anode of the equipment protected by the anode protection law.

 

The basic function of the finned tube heat exchanger is to transfer heat and part of the heat of the hot fluid to the cold fluid. Therefore, the improvement of the heat exchanger's use capacity is to improve its heat transfer performance, thereby realizing the heat exchanger More heat transfer.

 

Under the premise of comprehensively considering the fluid resistance and no fluid-induced vibration, the flow rate should be as high as possible. For fluids without phase change, a heat transfer method close to countercurrent should be used as much as possible. The purpose of this is to increase the average temperature difference and reduce the temperature stress in the structure. In addition, when conditions permit, the inlet temperature of the hot fluid can be increased to lower the inlet temperature of the cold fluid.

 

Adopting proper tube spacing or arrangement can not only increase the heat transfer area per unit time, but also improve the flow characteristics, especially the heat transfer of poor tube bundles is better than that of parallel tube bundles. If the fluid on one side of the heat exchange device has a phase change and the fluid on the other side is in the gas phase, fins can be added to the heat transfer surface on the gas phase side to increase the heat transfer area, which is beneficial to heat transfer.
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