Vapor-liquid separation method for vertical condenser and condenser

Abstract

The invention relates to a vapor-liquid separation method for a vertical condenser and a condenser. The vapor-liquid separation method comprises that: 1) multilevel headers are arranged at two ends of a plurality of groups of heat exchange tubes which are in vertical descending arrangement, liquid collecting and flow guiding tubes communicated with the headers are all provided with a liquid leaking and vapor stopping device inside to make the liquid collecting and flow guiding tubes form an independent liquid separation space, and the liquid leaking and vapor stopping device is provided with at least one equivalent main hole and a plurality of equivalent auxiliary holes; 2) vapor enters the plurality of groups of heat exchange tubes in turn for condensation, condensate liquid flows into the liquid collecting and flow guiding tubes, and when accumulated liquid in the liquid separation space is less, liquid films formed on the tops of the main hole and the auxiliary holes can prevent the vapor from leaking from the liquid collecting and flow guiding tubes; 3) when the accumulated liquid is more, the accumulated liquid firstly penetrates the main hole to flow out, and the auxiliary holes are sealed by the liquid films formed on the tops continuously; and 4) when the thickness of an accumulated liquid layer is increased, the accumulated liquid gradually penetrates the auxiliary holes and flows out from the main hole and the auxiliary holes simultaneously. The condenser adopts the vapor-liquid separation method and the liquid leaking and vapor stopping device. The method effectively solves the problem that the liquid discharge amount of the condenser is restricted in the prior art.

Description

technical field [0001] The invention relates to a condenser, in particular to a vapor-liquid separation method of a vertical condenser and the condenser. Background technique [0002] A traditional air-cooled vapor-liquid phase change condenser includes a shell 100, a heat exchange tube 101, a steam inlet 102, a tee pipe 103 and a condensate outlet 104 (such as figure 1 As shown), wherein the heat exchange tube 101 is usually a serpentine tube, relying on air convection heat exchange outside the heat exchange tube 101 to condense the steam in the heat exchange tube 101. In the process of condensation heat transfer, as the condensation progresses, the condensate on the wall gradually increases, and then the film formation hinders the contact between the steam and the wall, which is the main thermal resistance of the condensation heat transfer. During the condensation process, the liquid film gradually thickens, and in the long-term later, it will be a complex two-phase flow ...

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Problems solved by technology

[0004] The header 200 in the above two patents both uses a single drain pipe 201 as a leaking liquid vapor blocking device. Leakage, but this structure brings the following problems: first, the diameter of the drain pipe 201 is smaller than that of the header 200, the flow range of the condensate is greatly restricted, and sometimes there is a problem of poor drainage

Although in the latter patent a liquid dispensing device (such as Figure 4 shown), but since the upper surface of the liquid separation device adopts a solid top cover 202, the contact surface between the condensate and the liquid separation device is the side surface of the porous medium during the operation of the condenser, so the liquid separation driving force of the liquid separation device is mainly the porous core 203 Capillary 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 separation. In addition, the structure of the liquid separation device is relatively complicated, and large-scale production and subsequent installation work in industrial production will bring certain difficulties

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