Retort and corresponding oven with ductwork

A retorting system configured for a batch-wise processing of a substance (8), comprising a retort (1), an oven (9), ductwork and a control system (15), wherein:

• a) the retorting system is configured for accommodating the retort (1) in the oven (9);
• b) the ductwork comprises a first (10) and a second duct (11);
• c) the retort (1) comprises at least one retort outlet (6) for extracting a product fluidum during the processing, and an opening for loading the retort with the substance prior to the processing and for discharging the processed substance after the processing, the retort outlet (6) being provided at a downwards facing part of the retort (1);
• d) the retort is coupled to the first (10) and the second duct (11) of the ductwork;
• e) the retort comprises at least one flow deflector (4), internal to the retort, for controlling a direction of a heat carrier fluidum from the first duct (10) via the at least one flow deflector (4) through the retort (1) to the second duct (11), whereby the heat carrier fluidum flows from a top of the retort downwards towards the retort outlet;
• f) the control system is arranged to control
• a flow of heat carrier fluidum through the first duct (10), the retort (1) via the at least one flow deflector (4) and the second duct (11) for direct heat transfer to the substance (8) inside the retort (1), and
• an indirect heat transfer to heat the substance (8) in the retort (1) from outside the retort across the retort wall (3), wherein the indirect heat transfer is applied non-uniformly over the surface of the wall (3) of the retort (1) to initiate, in operation, a reaction at a position remote from the retort outlet and to progress the reaction downwards towards the retort outlet,
• wherein the retorting system comprises at the bottom of the retort a collecting element (17) for collecting a condensate formed in the retort and passed through the retort outlet.