UNIT FOR INJECTING A COKE-DEPOSITION INHIBITOR SOLUTION INTO TUBULAR FURNACES FOR HYDROCARBON PYROLYSIS

摘要

The present invention pertains to the petro-chemical industry and can be used in ethylene and propylene production plants where coke deposition is prevented by supplying an inhibitor solution into the coil. The purpose of this treatment is to eliminate coil burnout in the region where the inhibitor solution is injected. To this end, a supply unit comprises a coil straight section with a line for supplying the raw material, an inhibitor pulveriser, a duct for supplying the inhibitor to the pulveriser as well as an additional duct surrounding the first one, wherein the above-mentioned elements are coaxially mounted. The supply unit further comprises a flow rectifier for reducing the strong turbulence downward in the flow direction, wherein said rectifier is arranged coaxially in the straight section of the coil in the area where the inhibitor solution is injected. After 11-month experiments, no failure has been recorded in the operation of the inhibitor supply unit while no coil burnout occurred in the mounting area of said supply unit.