METHOD FOR REMOVING COKE AND INHIBITING COKE FORMATION IN PYROLYSIS FURNACES AND DEVICE FOR CARRYING OUT SAID METHOD

摘要

An aqueous solution of alkali metal hydroxide is heated until the mixture of water steam and molten hydroxide is formed by the indirect heat exchange thereof with a heated substance flow. Said hydroxide is supplied to the surface of a cowl which is arranged in said flow. The molten hydroxide flows around the cowl surface and evaporates, the vapours thereof enter the flow. A branch pipe for supplying the solution is connected to pipes which are arranged in such a way that they are flowed around by the flow. Each pipe is provided with inserts which reduce a flow section. The cowl is provided with longitudinal ribs, each pipe being connected to the rib surface by the output end thereof.