Steam condenser of vacuum plant

Abstract

The invention relates to a steam condenser of a vacuum device. Compared with a steam condenser of a vacuum drying device, the steam condenser of a vacuum device can enhance the heat transfer performance and reduce the loss of the transmission temperature difference loss of a refrigerant and the vacuum steam of a condensing surface. A circular refrigerant evaporation tube inside the steam condenser of a vacuum drying device is changed from a smooth tube into a circular tube with an inner surface groove and then processed into a flat elliptical tube through deformation, one flat horizontal surface or two flat horizontal surfaces of a pair of flat horizontal surfaces is / are tightly attached to the inner wall surface of a channel of heat transfer medium fluid and is / are arranged in the channel to increase the tight attachment area of the inner wall surface of the channel of the heat transfer medium fluid inside a steam condensation plate and the elliptical refrigerant evaporation tube, and rods which can equidistantly generates turbulences are arranged along the elliptical refrigerant evaporation tube in the channel of the heat transfer medium fluid to confuse parallel flows of the outer surface of the elliptical refrigerant evaporation tube, thereby the heat transfer of convection films of the heat transfer medium fluid is promoted.

Description

technical field [0001] The present invention relates to the improvement of steam condensers of vacuum devices, especially the steam condensers of vacuum devices proposed as Japanese Patent No. 1177616 and Japanese Patent No. 3644845 previously developed by the applicant. Background technique [0002] The steam condenser (collector) of the vacuum device is assembled and widely used in the following way: in order to condense and collect the steam of water and other solvents evaporated from the object to be treated in the vacuum chamber on the low-temperature cooling surface, Thus, the vacuum pressure of the vacuum chamber is maintained at a desired value, and its main part is constituted by vacuum devices such as a vacuum freezing device, a vacuum drying device, a vacuum concentrator, a vacuum distillation machine, a vacuum cooler, and a solvent removal device. [0003] The collector (steam condenser) of the vacuum device supplies the cold heat to condense the vacuum steam fro...

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Problems solved by technology

[0023] The problem to be solved by the present invention is that the total heat transfer coefficient of the refrigerant in the above-mentioned refrigerant pipe 26 and the heat transfer medium liquid outside the refrigerant pipe 26 is reduced, and the heat exchange performance is reduced. The heat transfer of the nucleate boiling of the refrigerant inside the tube and the heat transfer of the film of the heat transfer medium liquid outside the tube are greatly increased, and the method of promoting heat transfer

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