Separation method of caprolactam ammoniation dehydration reaction product

The invention discloses a separation method of a caprolactam ammoniation dehydration reaction product, which utilizes the characteristic of large boiling point difference between components, the high-temperature reaction product is condensed at a higher temperature section, the condensed and separated condensate is rich in heavy components and caprolactam, and the contents of light components and water are low; the condensate is subjected to vacuum flash evaporation and evaporation in sequence, and flash steam containing water, ammonia and light components, evaporation steam containing caprolactam and 6-aminocapronitrile and heavy residual liquid enriched with heavy components are separated out in sequence; high-temperature gas-phase reaction products with most heavy components removed through condensation, the flash steam and the evaporated steam enter a first separation tower, a second separation tower and a product rectifying tower respectively in a steam (gas) phase mode, latent heat and part of sensible