A shell-and-tube heat exchanger

Abstract

The invention provides a gas-liquid two-phase flow shell-and-tube heat exchanger, which includes a shell, the two ends of the shell are respectively provided with heads, the connection position between the head and the shell is set with a tube plate, and the heat exchange tube Connect the tube sheets at both ends, the gas phase in the gas-liquid two-phase flow is insoluble or insoluble gas, that is, during the heat exchange process, the gas will not dissolve in the liquid, and the gas-liquid two-phase flow flows in the tube side, and the inside of the heat exchange tube A flow stabilization device is provided, the flow stabilization device includes a central rod arranged along the central axis of the heat exchange tube and a plurality of radial rods extending radially along the central rod, and a plurality of radial rods are arranged on the radial rods A fin extending toward the stem opposite to fluid flow, the fin having a tip extending in a direction opposite to fluid flow. The invention provides a heat exchanger of a flow stabilizing device with a new structure, which can enhance heat transfer, weaken the vibration of the pipeline and reduce the noise level when there is a gas-liquid two-phase flow in the pipeline.

Description

technical field [0001] The present invention relates to a shell-and-tube heat exchanger, and more particularly to a two-phase flow heat exchanger containing condensable gas. Background technique [0002] The gas-liquid two-phase flow heat transfer widely exists in various heat exchange devices. The gas-liquid two-phase flow in the heat exchange process will lead to low heat exchange efficiency, deterioration of heat exchange, and unstable fluid flow process due to the existence of the gas phase. And it will lead to the occurrence of water hammer phenomenon. When the gas-liquid phase of the two-phase working fluid is not uniformly mixed and flows discontinuously, the large-sized liquid mass will occupy the air mass space at high speed, resulting in unstable two-phase flow, which will violently impact equipment and pipelines, resulting in strong vibration and noise , which seriously threatens the safety of equipment operation. [0003] The inventor has also designed some flo...

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Problems solved by technology

However, it was found during the operation of this device that the space A formed between the three pipes is relatively small because the pipes are tightly combined, because the space A is formed by the convex arc of the three pipes, so most of the space A Narrowness will make it difficult for the fluid to enter and pass through, resulting in a short circuit of the fluid, which affects the heat transfer of the fluid and cannot play a good role in stabilizing the flow

Simultaneously because the many tubes of above-mentioned structure are combined together, manufacture difficulty

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