An exhaust device for u-shaped tube condenser with liquid discharge function

Abstract

The invention discloses an exhaust device for an U-shaped pipe condenser with a liquid draining function. The exhaust device is mounted in a cylinder of the U-shaped pipe condenser, and is arranged between an upper exhaust pipe and a lower exhaust pipe of an U-shaped heat exchange pipe horizontally arranged; the exhaust device comprises an exhaust master pipe, air sucking branch pipes, liquid collecting plates, liquid stop plates and liquid guide pipes; the exhaust master plate is a T-shaped pipe, and includes an axial pipe arranged in the axial direction of the cylinder and a radial pipe arranged in a direction perpendicular to the axial direction of the cylinder; the axial pipe and the radial pipe are intersected and communicated; the air sucking branch pipes are arranged on two sides of the radial pipe, and are intersected and communicated with the axial pipe; the liquid collecting plates are arranged between the exhaust master pipe and the air sucking branch pipes; the liquid stop plates are arranged at two ends of the liquid collecting plates; multiple liquid guide pipes are arranged on the liquid stop plates; and an outlet of the axial pipe is connected with an exhaust connecting pipe on the cylinder. The exhaust device can remove non-condensed gas and condensed liquid of a pipe bundle above an exhaust structure, and improves the condensation heat transfer coefficient and the equipment economy.

Description

technical field [0001] The invention relates to the technical field of condensers, in particular to an exhaust device for a U-shaped tube condenser with a liquid discharge function. Background technique [0002] U-shaped tube condensers are widely used in industry, among which, the existence of non-condensable gas has a great influence on the heat transfer performance of the condenser, for example, 1% non-condensable gas will reduce the condensation heat transfer coefficient 60% or more. [0003] Condensers in industry are generally designed with special devices for removing non-condensable gases, but for gravity-controlled horizontal condensation tube bundles, the liquid film thickness of the condensate outside the tubes has a greater impact on the condensation heat transfer coefficient. Moreover, the condensation coefficient outside the tubes of horizontal single-row tubes is much larger than that of horizontal multi-row tubes. This is because as the number of tube rows i...

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Problems solved by technology

Moreover, the condensation coefficient outside the tubes of horizontal single-row tubes is much larger than that of horizontal multi-row tubes. This is because as the number of tube rows increases, the liquid film outside the lower row of heat exchange tubes except the first row of tubes in multi-row tubes will As the condensate in the upper row of heat exchange tubes drips, it gradually thickens, resulting in a significant decrease in the condensation heat transfer coefficient of the lower row of heat exchange tubes

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