Propane dehydrogenation reaction device

The invention relates to the technical field of propane dehydrogenation preparation, in particular to a propane dehydrogenation reaction device which comprises a heat exchanger shell, a heat transfer pipe is connected to the interior of the heat exchanger shell through multiple sets of baffle plates, and a spiral pipeline assembly is connected to the outer wall of the heat transfer pipe and located in the heat exchanger shell in a sleeved mode. When the outer wall of a heat transfer pipe in the feeding and discharging heat exchanger is cleaned, a corresponding control valve is closed and opened, meanwhile, an air pump and a water pump are controlled to operate, the air pump generates high-pressure air, the high-pressure air and the water pump extract cleaning liquid, and the cleaning liquid is sequentially fed into a three-way connecting pipe and a spiral pipe at the same time after being pressurized to be mixed; and finally, the tar is sprayed out through the one-way spray head to perform high-pressure clean