Heat exchange device

Abstract

The invention provides a heat exchange device and belongs to the technical field of mechanical heat exchange equipment. Through the heat exchange device, the problem that an existing heat exchange device is low in heat exchange efficiency is solved. The heat exchange device comprises a shell, heat exchange tubes arranged in the shell in the length direction and a baffle plate spirally arranged inthe shell in the length direction. One end of the shell is provided with a shell pass fluid inlet, and the other end of the shell is provided with a shell pass fluid outlet. The outer sidewalls of theheat exchange tubes are provided with a plurality of fins. The heat exchange tubes are distributed around the axial line of the shell at intervals. The fins are in a strip shape. The side, facing theshell pass fluid inlet, of each fin is provided with a flow guide surface used for enable shell pass fluid to flow far away from the heat exchange tubes. The baffle plate is provided with baffling ports in the extension direction of the baffle plate at intervals, and the baffling ports get close to the axial line of the shell and allow the shell pass fluid to pass through. The heat exchange device can enable the shell pass fluid to form a radial whirl, so that the shell pass fluid makes more sufficient contact with the heat exchange tubes, the heat exchange efficiency is higher, and the heatexchange effect is better.

Description

technical field [0001] The invention belongs to the technical field of heat exchange equipment, and relates to a shell-and-tube heat exchange device. Background technique [0002] The heat exchange device is an energy-saving device that realizes heat transfer between materials between two or more fluids at different temperatures, so that heat is transferred from a fluid with a higher temperature to a fluid with a lower temperature, so that the temperature of the fluid reaches the process specification To meet the needs, it is also one of the main equipment to improve energy utilization, mainly used in petroleum, chemical, HVAC and other industries. [0003] Heat exchange devices are mainly divided into three categories: partition type, hybrid type and heat storage type. Among them, the shell-and-tube heat exchanger in the partition type has a simple structure, low cost, wide fluid cross-section, easy cleaning of scale, and a wide range of applications. It is the most widely...

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Problems solved by technology

Although the shell-side fluid passes through the baffle to form a turbulent flow around the shell flow channel, which improves the heat exchange efficiency to a certain extent, however, because the shell-side fluid always only flows around the axis of the shell, the shell-side fluid is close to the The part of the heat exchange tube is always in contact with the heat exchange tube, making its temperature close to the temperature of the heat exchange tube, resulting in a decrease in heat exchange efficiency, while the part of the shell side fluid far aw

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