Overflow type two-phase flow uniform distribution device for aluminum plate-fin heat exchanger

Abstract

The invention discloses an overflow type two-phase flow uniform distribution device for an aluminum plate-fin heat exchanger. The device comprises a gas-liquid separator, an aluminum plate-fin heat exchanger core, a liquid-phase seal head, a liquid-phase channel, a gas-phase seal head and a gas phase and liquid phase mixing channel. The gas-liquid separator is provided with a two-phase flow inlet,the aluminum plate-fin heat exchanger core is at least provided with a liquid-phase inlet seal head which is respectively connected with a liquid-phase outlet and a gas-phase outlet of the gas-liquidseparator through connecting pipes, and at least one layer of liquid-phase channel and at least one layer of gas phase and liquid phase mixing channel are arranged in the heat exchanger core; an inlet flow deflector and an outlet flow deflector are arranged in the liquid phase channel, a heat transfer fin is arranged between the inlet flow deflector and the outlet flow deflector, and an inlet flow deflector and a heat transfer fin are arranged in the gas phase and liquid phase mixing channel; a gas phase and a liquid phase are uniformly mixed in the mixing channel; and the structure can realize a two-phase flow uniform distribution function by only utilizing a conventional structure of the heat exchanger without additionally arranging uniform distribution elements in the heat exchanger core, and the device has the characteristics of simple structure, adaptability to various flow volumes and the like.

Description

technical field [0001] The invention relates to an aluminum plate-fin heat exchanger two-phase flow uniform distribution device, in particular to an overflow two-phase flow uniform distribution device suitable for any gas-liquid phase volume ratio and various flow rates, which belongs to the aluminum The technical field of manufacturing a plate-fin heat exchanger for two-phase flow gas-liquid uniform distribution and preventing bias flow. Background technique [0002] Aluminum plate-fin heat exchanger is a kind of equipment widely used in air separation, petrochemical, natural gas, coal chemical and other fields, and its heat transfer area per unit volume can be as high as 1500m 2 Above, it has the characteristics of small size and high heat transfer efficiency. In the core body of the plate-fin heat exchanger, each fluid has several layers of channels. The fluid, especially the gas-liquid two-phase flow, can distribute the gas-liquid two-phase fluid evenly to each layer af...

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Problems solved by technology

The existing aluminum plate-fin heat exchanger two-phase flow uniform distribution structure achieves the purpose of uniform distribution by setting additional uniform distribution elements in the heat exchanger core, which will lead to: 1. The local resistance at the uniform distribution element is very large , increased fluid flow resistance, 2. Increased material and processing costs, 3. Caused local stress concentration at the brazing of uniformly distributed components and partitions, affecting the service life of the heat exchanger, 4. Affected the core of the plate-fin heat exchanger Brazing strength and quality, 5. When the gas-liquid phase volume ratio differs greatly, many uniformly distributed components cannot achieve gas-liquid uniform distribution well

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