Heat-exchanger of dual-spiral sprue curved baffle

Abstract

This invention is concerned about a kind of heat exchanging equipment, referred in particular to curved baffle board spiral heat exchanger with twin helix slow passage. This device is developed by modifying the current flat baffle board heat exchanger with twin helix slow passage into one with spiral baffle board. This construction can avoid the gap at the connection point between baffle boards and further prevent liquid leakage from the gap while flowing in the spiral flow passage and can thus increase the rate of heat exchange. No edges or corners and board obstruction exists in the flow passage with spiral curved board, and as a result, dead space of flow in the spiral flow passage can be eliminated. Besides, flow resistance caused by the friction between the liquid and the baffle board can be reduced by changing the flat board into a spiral curved one. Pressure loss and scaling on the side can be further reduced.

Description

technical field [0001] The invention relates to a heat exchange process equipment, in particular to a helical curved surface baffle heat exchanger with double helical channels. Background technique [0002] Shell and tube heat exchangers are easy to manufacture, have low production costs, a wide range of material selection, easy cleaning, strong adaptability, large capacity, reliable work, and can adapt to high temperature and high pressure. It is widely used in many industrial fields, especially in the heat exchange equipment used in petroleum, chemical and energy sectors, the shell and tube heat exchanger is still in a dominant position. In order to enhance the heat transfer on the shell side without making the tubes too long, when designing the tube bundle of the heat exchanger, a common method is to use transverse baffles for splitting. Baffle types mainly include bow and spiral baffles. The shape of the spiral baffle can be divided into two types: plane and curved. ...

AI Technical Summary

Problems solved by technology

But on the one hand, due to the overlapping of plane plates to form a spiral flow channel, the end face of the plane baffle plate is blocked in the direction of fluid flow in the spiral flow channel, increasing and decreasing the pressure drop, and there are still some dead zones in the spiral flow channel , affecting the heat transfer effect; on the other hand, the lap joints of the plates will form larger gaps at the lap joints. While the fluid flows in the spiral channel, some fluid will leak from the lap gaps, resulting in a small part of the fluid not being able to Flow in the direction of the spiral flow channel, which affects the heat transfer effect and increases the flow resistance

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