Shell type heat exchanger configured from composite tubes of figured pattern card

Abstract

A tube ¿C shell heat changer with card combination consists of shell, seal head, tube bundle. Tube form entrance and exit on seal head and shell form entrance and exit on seal head. It features that card with external diameter corresponding to internal diameter of shell is set in sequence in shell, card is vertical to flow direction of tube bundle, a numbers of through holes are opened on each card and positions of through holes on two adjacent cards are staggered.

Description

technical field [0001] The invention relates to a flower plate combined shell and tube heat exchanger, which belongs to the technical field of power and energy. Background technique [0002] The traditional shell-and-tube heat exchanger is a baffle-type structure. Generally, a number of baffles are set on the shell side, so that the fluid is repeatedly reversed on the shell side and flushes the heat exchange tube bundle vertically, so as to increase the flow velocity and turbulence of the fluid and improve Shell side heat transfer effect. [0003] However, this kind of baffle heat exchanger has the following fatal shortcomings because the shell-side fluid scours the tube bundle laterally and constantly changes the flow direction: [0004] The presence of flow dead zones and leakage dead zones on the shell side reduces the effective heat transfer area by 25 to 30 percent; [0005] Horizontal scouring of the tube bundle will induce vibration of the heat exchange tubes, which...

AI Technical Summary

Problems solved by technology

[0005] Horizontal scouring of the tube bundle will induce vibration of the heat exchange tubes, which is the main cause of heat exchange tube rupture and tube sheet leakage, thus greatly shortening the life of the entire heat exchanger;

[0006] The flow resistance is large, and the resistance is small when there are few baffles, but the natural frequency of the heat exchange tube is low, the anti-vibration ability is poor, and the heat transfer coefficient K value is also greatly reduced, and the resistance increases when the number of baffles increases;

[0007] The dirt in the fluid is easy to deposit on the surface of the heat exchange tube, the K value decreases, and the heat transfer effect becomes poor

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