METHOD OF DECOKING AN INSTALLATION FOR STEAM CRACKING HYDROCARBONS RESPONDING STEAM-CRACKING INSTALLATION

摘要

A method of decoking the inner wall of a hydrocarbon steam cracker by means of very small solid particles, which particles are passed through a tube 12 and an indirect quench device 16 of the steam cracker 10. Is sprayed on. At the outlet of the indirect quench device, cyclone 28 separates the solid particles from the gaseous product and mixes the solid particles with liquid or gas and recycles them through the apparatus after their pressure rises. The present invention also relates to a steam cracking apparatus which can carry out the process.