The invention relates to a taper core type supersonic condensation 
cyclone separator, belonging to the technical field of expansion 
refrigeration and condensation separation of pressure gas. The taper core is inserted in a passage, and the 
diameter of the taper core is changed at different places, so as to form the passage with a gradually decreased section part, a constant 
throat part and a gradually increased section part; therefore, a constant 
diameter inner hole can be adopted to avoid gradually increased small taper 
pipe passage which is difficult to be machined, so that the spin strength is not weakened due to the 
diameter increase. The taper core type supersonic condensation 
cyclone separator enables low-temperature working condition by means of pressure expansion and cooling of the gas, and reinforces spin by means of diameter decrease to generate strong 
centrifugal force field. The pressure can be increased after separation. The taper core type supersonic condensation 
cyclone separator has the advantages of no moving pieces, no need of external drive, energy saving, compact size, low cost, stable and reliable operation, and applicability to condensation separation of 
mixed gas with 
high pressure and low flow rate and separation of heavy components of 
natural gas and 
petroleum gas, in particular to offshore platform and other occasions with limited space due to compact size.