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 includes a mixture flow tube portion 2B having a Venturi tube-type flow tube 7 in which a diameter-reduced portion 7A, a throat portion 7B and a diameter-enlarged portion 7C are formed, and the condensing mixing device injects steam to a liquid flowing in the flow tube to condense the steam and mix the same into the liquid. In the condensing mixing device, a swirl flow forming portion 2A is provided which is positioned in an extension of an axis X of the flow tube at an upstream side with respect to the flow tube 7 and which accords the liquid of low temperature to flow toward the flow tube communicated and connected with the diameter-reduced portion. In the swirl flow forming portion 2A, the liquid of a kind same as the liquid of low temperature in the flow tube is injected from the tangential direction. In the diameter-enlarged portion 7C of the mixture flow tube portion 2B, stepped portions 10B-1, 10B-2 are formed in a plurality of axial-direction positions and stepped diameter-enlarged portions 7C-1, 7C-2 successively diametrically enlarged at the stepped portions and extended toward the downstream side are provided, and the steam holes 10-1, 10-2 are formed on an upstream-side position in a region of the stepped diameter-enlarged portions.;COPYRIGHT: (C)2015,JPO&INPIT