Combined multi-shell spiral baffle plate shell-and-tube heat exchanger

Abstract

The invention relates to the combined multi-shell spiral baffle board shell-and-tube exchanger, which includes the shell. One end of the shell is set with the pipe side inlet and the pipe side outlet. The heat exchanging bundle is through the baffle board and connected to the two pipe boards in two ends of the shell. The first internal bushing is set in the shell and the second is set out of the first internal bushing. One end of the second internal bushing is connected to the pipe board and one end of the first internal bushing is set with the clapboard; the shell is installed with the inlet pipe of the out shell and the outlet pipe of the inner shell. The out shell and the middle shell use the whole continuously spiral baffle board; the inner shell uses the non continuously spiral baffle board or bow baffle board or disc-ring baffle board or baffle pole or the whole round baffle board or not setting the baffle board; the baffle board of every shell has the self anti dirty hole. The invention has simplified the process and decreased the pressure loss but increased the compaction and self anti-dirty ability of the heat exchanger; also it decreases the cleaning cost and prolongs the using life.

Description

technical field [0001] The invention relates to a shell-and-tube heat exchanger used in petrochemical, energy and power, metallurgy, refrigeration, seawater desalination and other industrial fields, in particular to a combined shell-and-tube heat exchanger with multi-shell side spiral baffles . Background technique [0002] Heat exchanger is an important unit equipment in petrochemical, energy power, metallurgy, refrigeration, seawater desalination and other industries, and shell-and-tube heat exchangers are the most widely used. In the shell-and-tube heat exchanger, the role of the baffle is not only to support the heat exchange tube bundle, but also to change the flow direction of the shell-side fluid to enhance heat transfer. [0003] There are many problems in the traditional bow-shaped baffles: ①The bow-shaped baffles cause the fluid to impact the tube bundle vertically, resulting in a large pressure drop along the way; The heat exchange efficiency is lowered, and fou...

AI Technical Summary

Problems solved by technology

[0003] There are many problems in the traditional bow-shaped baffles: ①The bow-shaped baffles cause the fluid to impact the tube bundle vertically, resulting in a large pressure drop along the way; The heat exchange efficiency is lowered, and fouling is easy; ③ Leakage exists between the baffle plate and the shell wall and between the heat exchange tube and the baffle plate, and the side flow and leakage flow reduce the effective mass flow across the tube bundle. The heat exchange efficiency on the shell side is reduced; ④The fluid sweeps across the heat exchange tube bundle at high speed, which will induce the vibration of the heat exchange tubes and shorten the life of the heat exchanger

The existing spiral baffle heat exchanger cannot have the advantages of continuous spiral baffles and discontinuous spiral baffles at the same time

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