A shell and tube heat exchanger

Abstract

The invention discloses a shell-and-tube heat exchanger, which comprises a shell, a front head, a rear head, a heat exchange tube, a tube bundle support, a front tube plate, a rear tube plate, a tube side inlet, a tube side outlet, The shell side inlet, the shell side outlet and the tie rod, the heat exchange tube includes a tube body and an inner ball piece, and the inner ball piece includes metal balls arranged in the tube body at equal intervals along the axis of the tube body, connected to each adjacent two The metal rod between the metal spheres, the tube bundle support is to dig a circle from the middle part of a full circular plate, and the area of ​​the dug out circle is equal to the area of ​​the remaining ring, and the remaining ring is the baffle A , the baffle A is provided with a tube hole a for the heat exchange tube to pass through, and the dug out circle is the baffle B, and the baffle B is provided with a tube hole b for the heat exchange tube to pass through. The flow plate B is fixedly connected to the front tube plate and the rear tube plate through a plurality of tie rods. Compared with the existing enhanced heat transfer technology, the tube-side and shell-side convection heat transfer coefficients are increased, while the resistance increase is very small.

Description

technical field [0001] The invention relates to the field of heat exchangers, in particular to a shell-and-tube heat exchanger. Background technique [0002] Existing shell-and-tube heat exchangers generally set baffles in the shell side to support and reinforce the heat exchange tubes. Traditional shell-and-tube heat exchangers generally use arcuate baffles, which are shell-and-tube heat exchangers. Among the components that support the heat exchange tube, the existing supporting baffles are prone to flow dead corners, and the heat transfer area cannot be fully utilized, resulting in the problems of low shell-side heat transfer coefficient, easy scaling, and large fluid resistance; Moreover, when the fluid flows laterally through the tube bundle, the tube may also induce vibration, which will destroy the reliability of the tube and its connection with the tube sheet. The inner insert strengthens the heat transfer tube, such as inserting a heat transfer tube such as a tie, ...

AI Technical Summary

Problems solved by technology

[0002] Existing shell-and-tube heat exchangers generally set baffles in the shell side to support and strengthen the heat exchange tubes. Traditional shell-and-tube heat exchangers generally use bow-shaped baffles, which are shell-and-tube heat exchangers. For the parts that support the heat exchange tubes, the existing support baffles are prone to flow dead angles, and the heat transfer area cannot be fully utilized, so there are problems of low heat transfer coefficient of the shell side, easy scaling, and large fluid resistance; And when the fluid flows laterally through the tube bundle, it may also cause the tube to generate induced vibration, which will damage the reliability of the tube and its connection with the tube sheet; in addition, the existing shell-and-tube heat exchanger generally adopts Internal inserts to strengthen heat transfer tubes, such as inserting ties, helical sheets, spiral coils and other heat exchange tubes in the tubes, while increasing the heat transfer coefficient in the tubes, the flow resistance in the tubes also increases, and more power needs to be provided; not applicable Heat transfer of low Reynolds number or high viscosity fluids; easy to scale, heat transfer efficiency gradually decreases with time during use

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