A vapor-liquid two-phase flow shell-and-tube heat exchanger

Abstract

The invention provides a gas-liquid two-phase flow shell-and-tube heat exchanger, which includes a shell, and the two ends of the shell are respectively provided with heads, and 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 vapor phase in the vapor-liquid two-phase flow can condense into a liquid phase during the heat exchange process, and the vapor-liquid two-phase flow flows in the tube side, and a flow stabilization device is installed in the heat exchange tube, and the stabilization The flow 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 in the direction opposite to the fluid flow Extended fins having tips extending in opposite directions of 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 vapor-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] Vapor-liquid two-phase flow heat exchange widely exists in various heat exchange devices. Due to the existence of the vapor phase in the heat exchange process of vapor-liquid two-phase flow, the heat exchange efficiency will be low, the heat exchange will be deteriorated, and the fluid flow process will be unstable. , and 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 al...

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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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