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

Abstract

The invention provides a gas-liquid two-phase flow heat exchange pipe. The gas phase of a gas-liquid two-phase flow is insoluble or slightly-soluble gas, that is, during heat exchange, the gas cannotbe dissolved in the liquid, and the gas-liquid two-phase flow flows in the heat exchange pipe. Flow stabilizers are arranged inside the heat exchange pipe; each flow stabilizer comprises a central rodaxially arranged along the center of the heat exchange pipe and multiple radial rods extending in the radial direction along the central rod; multiple fins extending from the radial rods to the direction opposite to the flowing direction of the flow are arranged on the radial rods; the fins comprise tips; and the tips extend in the direction opposite to the flowing direction of the flow. The heatexchange pipe is characterized in that the multiple flow stabilizers are arranged inside the heat exchange pipe; the distribution density of the fins inside the different flow stabilizers is reducedfrom the inlet of the heat exchange pipe to the middle of the heat exchange pipe; and the distribution density of the fins inside the different flow stabilizers is increased from the middle of the heat exchange pipe to the outlet of the heat exchange pipe. The heat exchange pipe which adopts the new structure and is provided with the flow stabilizers is provided, when the gas-liquid two-phase flowflows in the pipe, through the arrangement, the vibration and the noise can be reduced to the greatest extent, and meanwhile, the flowing resistance of the liquid can be reduced.

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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