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Shell and tube heat exchanger
Also known as tubular heat exchanger. It is a partition type heat exchanger with the wall
Classification:
Tube oil cooler
Hotline:
Shell and tube heat exchanger
1、 Working principle and structure of shell and tube heat exchanger
Also known as tubular heat exchanger. It is a partition type heat exchanger with the wall of the tube bundle enclosed in the shell as the heat transfer surface. This type of heat exchanger has a simple structure, reliable operation, and can be made of various structural materials (mainly metal materials). It can be used at high temperatures and pressures and is currently the most widely used type. According to the compensation measures adopted, shell and tube heat exchangers can be divided into four types: fixed tube plate heat exchangers, floating head heat exchangers, U-shaped tube heat exchangers, and packed box heat exchangers.
Shell and tube heat exchangers belong to inter wall heat exchangers, and each time the fluid passes through the tube bundle is called a tube pass; Each pass through the shell is called a shell pass. The internal fluid channel of the heat exchange tube is the tube side, while the external fluid channel of the heat exchanger is the shell side. When the fluid temperatures in the tube side and shell side are different, the fluid with higher temperature will pass through the heat exchange tube wall and transfer heat to the fluid with lower temperature, thereby cooling the fluid with higher temperature and heating the fluid with lower temperature, achieving the heat exchange process.
The main structure of a shell and tube heat exchanger includes a tube box, a shell, baffles, tube sheets, etc. The shell of a shell and tube heat exchanger is mainly a circular cylinder, and the tubes are mainly straight or U-shaped tubes. The arrangement of pipes is mainly in the form of equilateral triangles and squares. When deployed in a triangular manner, a larger number of pipes can be arranged inside the shell of the same diameter, which can increase the heat transfer area of the shell and tube heat exchanger. However, this arrangement is difficult to clean and has high fluid resistance. A baffle plate is set in the middle of the tube bundle to control the fluid in the shell side, thereby changing the fluid target and effectively flushing the pipes, improving heat transfer efficiency, and supporting the pipes.
2、 Precautions for using heat exchanger:
Keep the pipeline clean. Whether before or after work, the pipeline network must be cleaned to avoid heat exchanger blockage. In addition, attention should be paid to cleaning the dirt remover and filter to ensure the smooth completion of the entire heat exchange work.
Strictly control the softened water. Before treating the heating medium, it is necessary to check the water quality in the system and the softening tank to ensure that the water quality is qualified before injection.
Test the new system. For recent systems, it is not advisable to immediately alternate their use with the heat exchanger. Instead, the new system must be operated within a specified time period, and the heat exchanger can only be integrated into the system after completing operational testing. The purpose of doing so is to prevent impurities in the pipeline from damaging the internal equipment of the heat exchanger.
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Shell and tube heat exchanger
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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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