Fish oil winterizing, fractioning, crystallizing and growing reaction tank

The invention discloses a fish oil winterizing, fractioning, crystallizing and growing reaction tank. The reaction tank comprises an input component, a control component and an output component, wherein the input component comprises a nitrogen inlet which is arranged outside the reaction tank and is connected with a nitrogen replacement coil arranged inside the reaction tank; the control component is arranged at the upper end of the reaction tank; and the output component comprises a gas outlet which is formed at the upper end of the reaction tank and connected with a breather valve and is used for exhausting the replaced gas. The fish oil winterizing, fractioning, crystallizing and growing reaction tank has the beneficial effects that the problems that the process of winterizing and fractioning fish oil is interrupted or a volatile substance remained after deodorizing escapes due to constant nitrogen introduction can be solved; the problem that the flavor and taste of fish oil are seriously influenced and the deodorizing process is useless due to the fact that remained volatile substance in the cooling process cannot escape and is attached to the grease interface can be solved; and the problem of heat loss can be solved.