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Specializing in the research, development, production, sales, equipment consulting, maintenance, and accessory services of heat exchange technology, equipment, and systems
15
2023
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11
Shell and tube heat exchangers can be divided into the following main types.
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Summary:
The tube sheets at both ends of the fixed tube sheet heat exchanger are integrated with the shell, making the structure simple. However, it is only suitable for heat exchange operations where the temperature difference between hot and cold fluids is not significant, and mechanical cleaning of the shell side is not required. When the temperature difference is slightly larger but the shell side pressure is not too high, an elastic compensating ring can be installed on the shell to reduce thermal stress.
1. The fixed tube sheet heat exchanger has the tube sheets at both ends of the tube bundle integrated with the shell, featuring a simple structure. However, it is only suitable for heat exchange operations where the temperature difference between hot and cold fluids is not significant, and mechanical cleaning of the shell side is not required. When the temperature difference is slightly larger but the shell side pressure is not too high, an elastic compensation ring can be installed on the shell to reduce thermal stress.
2. The floating head heat exchanger allows the tube sheet at one end of the tube bundle to float freely, completely eliminating thermal stress. The entire tube bundle can be withdrawn from the shell, facilitating mechanical cleaning and maintenance. Floating head heat exchangers are widely used, but their structure is relatively complex and the cost is higher.
3. The U-tube heat exchanger has each heat exchange tube bent into a U shape, with both ends fixed to the upper and lower sections of the same tube sheet, divided into inlet and outlet chambers by a partition inside the tube box. This type of heat exchanger completely eliminates thermal stress, has a simpler structure than floating head types, but the tube side is not easy to clean.
4. The vortex heat film heat exchanger utilizes the latest vortex heat film heat transfer technology, enhancing heat transfer efficiency by changing the fluid's motion state. When the medium passes over the surface of the vortex tube, it strongly scours the tube surface, thereby improving heat exchange efficiency, reaching up to 10000W/m2℃. At the same time, this structure achieves corrosion resistance, high-temperature resistance, high-pressure resistance, and anti-scaling functions. Other types of heat exchangers have fixed directional flow in their fluid channels, leading to flow around the heat exchange tube surface, which reduces the convective heat transfer coefficient.
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Chongqing Southwest Saiwell Heat Exchange Equipment Co., Ltd.
Specializing in the research, development, production and sales, equipment consulting, maintenance, and accessory services of heat exchange technology, equipment, and systems, and undertaking the design and installation of thermal system engineering, energy conservation and emission reduction, and energy conservation and emission reduction system engineering.
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