Reaktor til genaktivering af faste stoffer

This reactor (1) comprises an elongate trough (10), which defines a reactivation chamber (C) extending in a longitudinal direction (D) from a first end of the trough to a second end (10B) of the trough. The reactor also comprises two shafts (20), which are arranged in the reactivation chamber and which extend therein parallel to one another in the longitudinal direction, each of the two shafts successively comprising a first part (20C), provided with a coil (21) for conveying solids, a second part (20D), provided with blades (23) for mixing solids, the length of the first part (20C) representing between 10% and 33% of the sum of the respective lengths of the first and second parts. The reactor also comprises a duct (40) for distributing a gaseous reactivation fluid, which is arranged in the reactivation chamber at bottom of the trough, which extends in the longitudinal direction (D) while running below at least the second part of the two shafts, and which is provided with one or several intake orifices (42) for entering the gaseous reactivation fluid into the reactivation chamber. This reactor is simple, cost-effective and high-performing, in particular to reactivate solids resulting from the treatment of fumes.