Tube sheet structure of heat exchanger and its wound tube heat exchanger

Abstract

A tube plate structure of a heat exchanger and a wound tube heat exchanger thereof, the tube plate structure comprising: a tube plate body having tube holes; a heat insulation gasket arranged on a first plate surface of the tube plate body, the heat insulation gasket having through holes corresponding to positions of the tube holes; and support tubes comprising tube bodies, a flange being arranged on a tube wall of each tube body, a first tube wall being located on one side of the flange, a second tube wall being located on the other side of the flange, a first heat insulation layer being arranged around an outer periphery of the first tube wall, a second heat insulation layer being arranged around an outer periphery of the second tube wall, and a third heat insulation layer being arranged around an outer periphery of the flange; the number of the support tubes matches the number of the tube holes, the part of each support tube with the first heat insulation layer is inserted into a corresponding tube hole, the part of each support tube with the second heat insulation layer is inserted into a corresponding through hole, and the part of each support tube with the flange and the third heat insulation layer is located between the tube plate body and the heat insulation gasket. The heat exchanger can withstand a large temperature difference between a tube-side medium and a shell-side medium.

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