Shell and Tube Type Heat Exchanger

Shell type (also known as tube type) heat exchanger is shell type heat exchanger is mainly composed of shell, tube bundle, tube plate and seal parts, shell is more circular, is equipped with parallel tube bundle or spiral tube, tube bundle both ends are fixed on the tube plate. Two kinds of fluid for heat transfer in the shell and tube heat exchanger, a flow in the tube, its stroke is called the pipe; One flows outside the tube and its travel is called the shell pass. The wall surface of the tube bundle is the heat transfer surface. The tubes come in different sizes, with diameters of 16mm, 20mm or 25mm, and wall thickness of 1mm, 1.5mm, 2mm and 2.5mm. Imported heat exchanger, the lowest diameter can be 8mm, the wall thickness is only 0.6mm. Greatly improve the heat transfer efficiency, in the domestic market gradually spread. Shell and tube heat exchanger, screw tube bundle design, can maximize the turbulence effect, increase the heat transfer efficiency. The asymmetric design of the inner shell and tube layer can reach up to 4.6 times. This asymmetric design determines its wide application in the field of steam - water heat transfer. The maximum heat transfer efficiency can reach 14000w/m2.k, greatly improving production efficiency and saving cost. At the same time, because tube and shell heat exchangers are mostly metal structures, with the introduction of the new version of GMP, stainless steel 316L as the main heat exchanger, will become the beverage, food, and pharmaceutical industry must choose.

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