Condensing mixing device and evaporative gas re-liquefaction unit having the same

摘要

PROBLEM TO BE SOLVED: To provide a condensing mixing device for effectively re-liquefying boil-off gas, and a boil-off gas re-liquefying apparatus having the same.;SOLUTION: The condensing mixing device has: a Venturi tube-type flow tube 7 including a diameter-reduced portion 7A, a throat portion 7B and a diameter-enlarged portion 7C that are formed from an upstream side toward a downstream side; and steam holes 10-1, 10-2... that are directed to a radial direction and a downstream-side direction of the flow tube and that are formed so as to have injection openings 10A-1, 10A-2, ... in an inner diameter surface of the diameter-enlarged portion at a plurality of axial X-direction positions of the flow tube. The condensing mixing device injects steam to a liquid flowing in the flow tube, from the injection openings of the steam holes, condenses the steam and mixes the same in the liquid. In the condensing mixing device, the diameter-enlarged portion 7C has stepped portions 10B-1, 10B-2,... in a plurality of axial-direction positions, and has stepped diameter-enlarged portions 7C-1, 7C-2,... successively diametrically enlarged at the stepped portions and extending toward the downstream side, and the injection openings 10A-1, 10A-2,... of the steam hole 10-1, 10-2,... are provided at an upstream-side position in a region of the stepped diameter-enlarged portion.;COPYRIGHT: (C)2015,JPO&INPIT