Internal liquid separating hood-type condensation heat exchange tube

摘要

An internal liquid separating hood-type condensation head exchange tube, comprising an external heat exchange tube and an internal liquid separating hood disposed in the cavity of the external heat exchange tube and coaxial with the external heat exchange tube. The internal liquid separating hood is a hollow tube with a plurality of micropores or gaps distributed on a wall surface. The condensate formed during the heat exchange is pumped to the internal liquid separating hood in time under the effect of surface tension of the liquid via the micropores or gaps, and then is discharged from the heat exchange tube by the internal liquid separating hood. Vapor is retained to flow in the annular region between the external heat exchange tube and the internal liquid separating hood, so the inner wall of the external heat exchange tube comes into contact with the vapor to the greatest extent.

主权项

1. An internal liquid separating hood-type condensation heat exchange tube, comprising an external heat exchange tube (1), wherein the cavity of the external heat exchange tube (1) is provided with an internal liquid separating hood (2) coaxial to the external heat exchange tube and the internal liquid separating hood (2) is a hollow tube with a wall surface of a porous structure (6), the porous structure (6) referring to a structure where a plurality of micropores or gaps with an equivalent diameter of d,d≤1.83⁢σg⁡(ρf-ρg),are distributed on the wall surface, where: σ represents the surface tension of the condensate, g represents the acceleration of gravity, ρf represents the density of the condensate, and ρg represents the density of vapor phase.