Tube-shell type heat exchange device

Abstract

The invention discloses a tube-shell type heat exchange device and aims to provide a heat exchange device which can effectively achieve heat exchange between two types of liquid, has temperature difference compensation capacity and can be prevented from being damaged due to over-large temperature difference stress between a shell and a heat exchange tube. The tube-shell type heat exchange device comprises a tube pass part, a shell pass part and a plurality of brackets, wherein the tube pass part comprises a tube pass inlet tube, a tube pass outlet tube and a plurality of heat exchange tubes; the shell pass part comprises an outer heat exchanger shell, a shell pass inlet tube and a shell pass outlet tube; the outer heat exchanger shell consists of a sealing head, a shell head and a tube box; a fixed tube plate is arranged between the shell head and the tube box; a sealing head tube plate is arranged between the sealing head and the tube box; a tube pass flow partition plate partitions the interior of the shell head into a tube pass inflow cavity and a tube pass outflow cavity; an expansion joint is arranged on the tube box. The tube-shell type heat exchange device has the beneficial effects that according to the characteristic hat the expansion joint is relatively easy to deform, by the cooperation of the slidable sealing head tube plate, the structural temperature difference compensation effect can be achieved, and the structural damage caused by over-large 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 exchange device. 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 he...

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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