Shell and tube heat exchanger

Abstract

The invention discloses a shell-and-tube heat exchanger and aims to a heat exchanger, which allows effective heat exchange between two liquids, which allows thermal difference compensation and which prevents damage caused by high thermal difference between a housing and heat exchange tubes. The shell-and-tube heat exchanger comprises a tube side portion, a shell side portion and a plurality of supports; the tube side portion comprises a tube side inlet tube, a tube side outlet tube and a plurality of heat exchange tubes; the shell side portion comprises a shell, a shell side inlet tube and a shell side outlet tube; the shell is composed of a sealing head, a shell head and a tube box; a fixing tube plate is disposed between the shell head and the tube box; a sealing head tube plate is disposed between the sealing head and the tube box; a tube side partition plate divides the inside of the shell head into a tube side inflow cavity and a tube side outflow cavity; the tube box is provided with an expansion joint. The shell-and-tube heat exchanger has the advantages that the expansion joint which easily deforms and the sealing head tube plate are used together to function in structural thermal difference compensating, and structural damage caused by high thermal 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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