Vapor-liquid separation method of segmented vapor-liquid phase change heat exchanger and phase change heat exchanger

Abstract

The invention relates to a steam liquid separation method for segmented steam liquid phase transformation heat exchanger and the heat exchanger thereof. The method is characterized in comprising: 1) disposing a straight-through collecting box on each of the two ends of at least one group of heat exchange tube, disposing a plurality of liquid leaking steam resisting devices in the two collecting boxes in stagger manner, dividing the two collecting boxes into a plurality of liquid separating spaces connected in sequence, and disposing at least one equivalent main hole and a plurality of equivalent auxiliary holes at the liquid leaking steam resisting device; 2) when less liquid exists in the liquid separating space, the liquid film formed on the main hole and the auxiliary hole top can resist the steam and liquid from entering the liquid separating space of the next collecting box; 3) when more liquid exists in the liquid separating space, the liquid can firstly break the main hole withlarger diameter to flow out caused by the pressure, while the auxiliary holes with smaller diameter is sealed by the liquid film formed on the top; 4) when the liquid layer thickness in the liquid separating space increases, the liquid can breaks the liquid films of the auxiliary holes with smaller diameter step by step and flows out from the main hole and the auxiliary holes. The invention effectively solves the problem the drainage amount is limited existing in the current heat exchangers.

Description

technical field [0001] The invention relates to a vapor-liquid phase change heat exchanger, in particular to a vapor-liquid separation method and a heat exchanger of a segmented vapor-liquid phase change heat exchanger. Background technique [0002] Vapor-liquid phase change heat exchangers are widely used in energy systems, power engineering, chemical and petrochemical industries, automotive industries, etc., such as air condensers in thermal power stations, air conditioning engineering, vehicle air conditioning, and evaporation and condensers in chemical processes. [0003] The traditional air-cooled vapor-liquid phase change heat exchanger mostly adopts the serpentine tube process, relying on air convection heat exchange outside the tube, and the working fluid condenses or evaporates inside the tube. In the condensation heat transfer in the tube, as the condensation progresses, the condensate on the wall gradually increases, and then the film formation hinders the contact...

AI Technical Summary

Problems solved by technology

[0005] The headers 2 in the above two patents all use a single drain pipe as the leaking liquid vapor blocking device 30. This thinner drain pipe can better prevent the gas separated in the header from leaking from the drain pipe, but This structure also brings the following problems: first, the diameter of the drain pipe is smaller than that of the header, the flow range of the condensate is greatly restricted, and sometimes there is a problem of poor drainage

Although a liquid dispensing device (such as image 3 shown), but since the upper surface of the liquid separation device adopts a solid top cover, the contact surface between the condensate and the liquid separation device during the operation of the condenser is the side surface of the porous medium, so the liquid separation driving force of the liquid separation device is mainly the capillary of the porous core. Suction force, and the size of the suction force is determined by the structural parameters of the selected porous medium, and the self-adjusting ability is weak. When the amount of condensate is large, there may be a problem of insufficient suction force, which affects the liquid separation. effect; in addition, the structure of the liquid separator is relatively complicated, and large-scale production and subsequent installation work in industrial production will bring certain difficulties

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