The invention discloses an efficient shell tube type
heat exchanger and a manufacturing method of the
heat exchanger. Gaseous refrigerants of an upper layer heat exchange tube surface of the
heat exchanger are cooled to liquid, and the liquid is dropped and poured to a lower layer heat exchange tube
surface level by level from the upper layer heat exchange tube surface, and then dropped and poured to a dropping and pouring prevention partition plate, it is ensured that a lower layer heat exchange tube cannot be dropped and poured by liquid-state refrigerants of an upper layer heat exchange tube, the contact area of the lower layer heat exchange tube and the gaseous refrigerants is increased,
heat resistance is reduced, and the heat exchange effect is improved; the refrigerants are located outside a heat exchange tube to flow, cooling water is located in the heat exchange tube to flow, but, the flowing direction of the cooling water is reverse, backward flowing of two strands of fluid of the refrigerants and the cooling water can be achieved, the
surface heat exchange coefficient of the heat exchange tube is improved, the heat exchange effect is improved, and the heat exchange performance of the reverse flow shell type heat exchanger is greatly improved. Compared with a traditional shell tube type heat exchanger, the phenomenon that the liquid-state refrigerants of the surface of the heat exchange tube are dropped and poured to the position between tube
layers, and heat exchange is affected is avoided, the reverse flow heat exchange of two kinds of heat exchange fluid of a shell side and a tube side is achieved, the heat
exchange coefficient is higher, the heat exchange
temperature difference is more uniform, materials are saved, and meanwhile, the energy efficiency ratio is improved.