A chemical heat exchange device

Abstract

The invention discloses a heat exchanging device for chemical industry, and aims to provide a heat exchanging device which can effectively realize the heat exchange of two kinds of liquid, has the capability of compensating for temperature difference, and can prevent the damage of a shell due to the excessive differential temperature stress between the shell and a heat exchanging tube. The heat exchanging device comprises a tube pass part, a shell pass part and a plurality of supports, wherein the tube pass part comprises a tube-pass inlet tube, a tube-pass outlet tube and a plurality of heat exchanging tubes; the shell pass part comprises an outer shell of the heat exchanging device, a shell-pass inlet tube and a shell-pass outlet tube; the outer shell of the heat exchanging device consists of an end cap, a shell head and a tube box, a fixing tube plate is arranged between the shell head and the tube box, an end-cap tube plate is arranged between the end cap and the tube box, a tube-pass flow partition plate divides the inside of the shell 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 heat exchanging device disclosed by the invention has the benefits that through the characteristic that the expansion joint is relatively easy to deform, the end-cap tube plate which can slide is matched, so that the heat exchanging device has a structural effect of compensating for temperature difference, and the structural damage due to the excessive differential temperature stress can be avoided.

Description

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

Images