a heat exchanger

Abstract

The invention discloses a heat exchanger. The heat exchanger can effectively realize the heat exchange between two fluids, and has the temperature difference compensating ability, and can prevent the damage caused by too big temperature difference stress between a shell body and a heat exchange pipe. The heat exchanger comprises a tube pass part, a shell pass part, and several brackets; 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 includes an outer shell body of the heat exchanger, a shell pass inlet tube, and a shell pass outlet tube; the outer shell body of the heat exchanger is composed of an enclosure head, a shell head and a tube box; a fixing tube plate is arranged between the shell head and the tube box, and an enclosure head tube plate is arranged between the enclosure head and the tube box; a tube pass flow isolating plate partitions the inner part of the shell body into a tube pass inflow cavity and a tube pass outflow cavity; an expansion joint is arranged on the tube box. The heat exchanger has the following beneficial effects: through the characteristics of relatively easy deformation of the expansion joint, and cooperation of the slideable enclosure tube plate, the heat exchanger can play a role of structural temperature compensation, and avoid the structural damage caused by too big temperature difference stress.

Description

technical field [0001] The invention belongs to the technical field of chemical heat exchange, and in particular relates to a 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 exchange tube, so ...

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

Images