Shell-and-tube heat exchangers are also known as tube-and-tube heat exchangers. It is a partition wall heat exchanger with the wall surface of the tube bundle enclosed in the shell as the heat transfer surface. This heat exchanger has a simple structure and reliable operation. It can be manufactured with various structural materials (mainly metal materials) and can be used under high temperature and high pressure. It is the most widely used type at present.

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According to the compensation measures adopted, the shell and tube heat exchangers can be divided into four types: fixed tube plate heat exchangers, floating head heat exchangers, U-tube heat exchangers, stuffing box heat exchangers and so on.

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