Shell-and-tube heat exchangers are dominant in heat exchangers, which not only have a strong structure, but also have a high degree of reliability and a wide range of adaptability. At present, the amount of shell-and-tube heat exchangers accounts for about 70% of all heat exchangers, so improving the heat transfer efficiency of shell-and-tube heat exchangers is the most concerned problem of major suppliers.

To improve the heat transfer efficiency of shell and tube heat exchangers, we should start from two aspects: first, change the shell pass structure, promote fluid turbulence, and improve the shell pass heat transfer efficiency; The second is to strengthen the heat exchange element ---- heat exchange tube to improve the heat transfer efficiency of the heat exchanger.

The most common shell structure used in traditional heat exchangers is the bow baffle heat exchanger, which is simple in structure and easy to process, but the choke and pressure drop are large, and the heat exchange efficiency is low. Now it has been replaced by the spiral baffle heat exchanger and the baffle rod heat exchanger in many practical applications.

The helical baffle heat exchanger has a continuous helical surface, and the fluid is in an approximate helical flow state when it is deflected. Compared with the curved baffle, the total heat transfer coefficient of the spiral baffle can be increased by about 1/4 under the same working condition, and the size of the heat exchanger can be greatly reduced.

The shell resistance loss of the baffle heat exchanger is about 30% less than that of the conventional segmental baffle heat exchanger, and the tube bundle vibration can be overcome effectively. It does not have the corrosion caused by the dead Angle of the traditional plate support structure, thus extending the service life of the equipment.

To sum up, the shell structure and heat exchange tube of shell-and-tube heat exchanger play a crucial role in the heat transfer efficiency of the heat exchanger, so the designer needs to consider comprehensively and rationally layout in the design. Rudy Petrochemical technical engineers can customize the design according to the specific working conditions of users to ensure greater economic benefits.