A Varying Length Condensable Porous Steady Flow Device Heat Exchanger

Abstract

The invention provides a liquid-vapor two-phase flow tubular shell type heat exchanger. The heat exchanger comprises a shell, wherein the two ends of the shell are separately provided with end sockets, tube plates are arranged at the connecting positions of the end sockets and the shell, and heat exchange pipes are connected with the tube plates at the two ends; a vapor phase in liquid-vapor two-phase flow can be condensed into a liquid phase in the heat exchange process, and the liquid-vapor two-phase flow flows in a tube pass; and flow stabilizing devices used for reducing vibration and noise are arranged in the heat exchange pipes, a plurality of flow stabilizing devices are arranged in the same heat exchange pipe, and the length of the flow stabilizing devices is gradually reduced in the flowing direction of fluid in the heat exchange pipes. According to the heat exchanger provided by the invention, through the length variation of the flow stabilizing devices, when the liquid-vaportwo-phase flow occurs in the pipeline, the vibration of the pipeline is reduced to an utmost degree, and the noise level is reduced; and at the same time, flow resistance is reduced, and the heat exchange uniformity is improved.

Description

Technical field [0001] The invention relates to a shell and tube heat exchanger, in particular to a two-phase flow heat exchanger containing condensable vapor. Background technique [0002] The vapor-liquid two-phase flow heat exchange is widely present in various heat exchange devices. The vapor-liquid two-phase flow in the heat exchange process will cause low heat exchange efficiency, deteriorate heat exchange, and unstable fluid flow due to the presence of the vapor phase. , And will lead to the occurrence of water hammer. When the vapor and liquid phases of the two-phase working fluid are not uniformly mixed and flow discontinuously, the large-sized liquid mass will occupy the gas mass space at a high speed, causing the two-phase flow to become unstable, thereby violently impacting the equipment and pipelines, causing strong vibration and noise , Which seriously threatens the safety of equipment operation. [0003] The inventor also designed a multi-tube flow stabilization de...

AI Technical Summary

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 The narrow space will make it difficult for the fluid to enter and pass through, resulting in a short circuit of the fluid, which affects the heat exchange 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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