Tube array type heat exchanger

Abstract

The invention discloses a tube array type heat exchanger, and aims at providing a heat exchanger with the advantages that the heat exchange between two kinds of liquid can be effectively realized, the temperature difference compensation capability is realized, and the damage due to too great temperature difference stress between a casing and a heat exchange tube can be prevented. The tube array type heat exchanger comprises a tube pass part, a casing pass part and a plurality of support frames, wherein the tube pass part comprises a tube pass inlet tube, a tube pass outlet tube and a plurality of heat exchange tubes, the casing pass part comprises a heat exchanger outer casing, a casing pass inlet tube and a casing pass outlet tube, the heat exchanger outer casing consists of a sealing head, a casing head and a tube box, a fixing tube plate is arranged between the casing head and the tube box, a sealing head tube plate is arranged between the sealing head and the tube box, one tube pass separation plate separates the inside of the casing head into a tube pass flow inlet cavity and a tube pass flow outlet cavity, and an expansion joint is arranged on the tube box. The tube array type heat exchanger has the beneficial effects that the characteristic that the expansion joint part is relatively easy to deform can be utilized to be matched with the slidable sealing head tube plate to achieve the structural temperature difference compensation effect, and the structure damage due to too great temperature difference stress is avoided.

Description

technical field [0001] The invention belongs to the technical field of chemical heat exchange, and in particular relates to a shell and tube heat exchanger. Background technique [0002] Heat exchangers are process equipment for heat transfer and are widely used in oil refining, petrochemical industries, and other general chemical industries. Examples include cooling, condensation, heating, evaporation, and waste heat recovery. Due to the diversity of use conditions (corrosion, temperature, pressure, medium, impurities, heat exchange capacity, etc.), heat exchangers also need to have a reasonable structure and form. [0003] The shell and tube heat exchanger (shell and tube heat exchanger) is one of the most widely used heat transfer equipment at present. It exchanges heat between two liquids in the following way: one liquid flows through the shell, and , another liquid flows through the heat exchange tube, and the heat exchange is performed inside and outside the heat exc...

AI Technical Summary

Problems solved by technology

[0004] Although the current tube-and-tube heat exchanger can achieve heat exchange function well, in practical applications, there is often a situation where the temperature difference between the shell wall and the tube wall is large (caused by factors such as the large temperature difference between the two liquids), As a result, the thermal elongation of the shell and the heat exchange tube is significantly different, which will cause a considerable temperature difference stress between the shell and the heat exchange tube and the extrusion destructive force between the structures, resulting in serious damage to the equipment

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