Preheating section structure of perfluoropropylene cracking furnace

The utility model discloses a preheating section structure of a perfluoropropylene cracking furnace. The perfluoropropylene cracking furnace preheating device comprises a supporting frame and a perfluoropropylene cracking furnace preheating section arranged on the supporting frame, a gas outlet and a gas inlet are formed in the top and the bottom of the perfluoropropylene cracking furnace preheating section respectively, a medium-frequency induction heating furnace is arranged outside the perfluoropropylene cracking furnace preheating section in a sleeving mode, and the medium-frequency induction heating furnace is connected with a medium-frequency power cabinet. According to the preheating section structure of the perfluoropropylene cracking furnace, the preheating section is heated in amedium-frequency heating manner; the temperature of the material gas can be rapidly raised to 700-800 DEG C; the length of the preheating section is reduced by 1/3-1/2 than that of the preheating section when electric heating