Shell-and-tube heat exchanger

Abstract

The invention provides a shell-and-tube heat exchanger. The shell-and-tube heat exchanger comprises an outer shell and an inner shell, a heat exchange tube bundle and a baffle plate are arranged in an inner cavity of the inner shell, the heat exchange tube bundle penetrates through the baffle plate, an inner cavity of the heat exchange tube bundle serves as a circulation channel of a heat exchange medium A, blocking bodies are arranged at the two ends of the heat exchange tube bundle correspondingly, the outer edges of the blocking bodies are fixedly connected to the inner shell, the blocking bodies, the heat exchange tube bundle and the inner shell jointly define a circulation channel for containing a heat exchange medium B, the outer shell with good rigidity is adopted as a pressure bearing component and used for supporting a structural part in the outer shell, and the inner shell with good toughness is adopted as a sealing component and used for eliminating stress generated by a heat exchange medium. According to the heat exchanger, the problem that shaping and rigidity of a traditional shell-and-tube heat exchanger shell cannot be considered at the same time is solved, the problems that the traditional shell-and-tube heat exchanger shell expands and deforms, and the deformation difference is large are solved, the shell-and-tube heat exchanger is excellent in heat exchange effect, and the problems of uneven heat exchange and large heat exchange deviation do not exist in the heat exchange process.

Description

technical field [0001] The invention belongs to the field of heat exchange equipment, and in particular relates to a shell and tube heat exchanger. Background technique [0002] Most of the existing shell-and-tube heat exchangers connect the heat exchange tube bundle with the tube sheet, and then use the cylinder (shell) to wrap the heat exchange tube bundle and the tube sheet to form two independent spaces: the inner cavity of the heat exchange tube bundle And the tube box connected with it is called the tube-side space; the channel outside the heat exchange tube and the part connected with it is called the shell-side space. [0003] Such as: the shell-and-tube heat exchanger disclosed in document CN109916198A, including heat exchanger main body, hot fluid inlet, stud, sealing gasket, cold fluid outlet, outer shell, inner shell, shell fixing frame, fixing ring rod, cold fluid inlet , first flange, thermal fluid outlet, first tube box, second flange, baffle plate, heat exch...

AI Technical Summary

Problems solved by technology

[0006] As mentioned above, shell and tube heat exchangers have the problem that the rigidity and toughness of the shell cannot be balanced, and there are problems that the shell is easy to expand and deform and the difference in expansion and deformation is large during use. However, the existing methods to solve the expansion problem are all It is to install flexible components (such as expansion joints) on the shell to reduce or eliminate stress, but this method cannot solve the problem of large differences in shell expansion and deformation

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