Tube-and-shell heat exchanger

Abstract

The invention discloses a tube-and-shell heat exchanger and aims to provide a heat exchanger, allowing effective heat exchange between two liquids, having thermal difference compensating capacity and preventing damage caused by thermal difference stress between a shell and heat exchange tubes. The tube-and-shell heat exchanger comprises a tube side portion, a shell side portion and a plurality of supports; the tube side portion comprises a tube side incoming tube, a tube side outgoing tube and a plurality of heat exchange tubes; the shell side portion comprises a housing, a shell side incoming tube and a shell side outgoing tube; the housing is composed of a seal head, a shell head and a tube box; a fixing tube plate is disposed between the shell head and the tube box; a seal head tube plate is disposed between the seal 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 tube-and-shell heat exchanger has the advantages that the expansion joint featuring ease of deformation and the seal head tube plate slidable fit to function in structural thermal difference compensation, and structural damage caused by excessively high thermal temperature stress is avoided.

Description

Technical field [0001] The invention belongs to the technical field of chemical heat exchange, and particularly relates to a shell-and-tube heat exchanger. Background technique [0002] Heat exchangers are process equipment for heat transfer, which 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 variety of use conditions (corrosiveness, temperature, pressure, medium, impurities, heat exchange capacity, etc.), the heat exchanger also needs to have a reasonable structure and form. [0003] Tubular 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 outside the heat exchange tube , Another liquid flows through the heat exchange tube, and the heat exchange tube performs heat exchang...

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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