Autoclave

B - Operations – Transporting – 01 – J

Patent

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Details

B01J 3/04 (2006.01) B01J 3/00 (2006.01)

Patent

CA 2196719

The invention relates to an autoclave for pressurized-steam treatment of porous, mineral feedstock (5) comprising an essentially horizontal, circular cylindrical interior which is enclosed by an autoclave jacket (1), and has an inner chamber (2) which accommodates the feedstock (5) and a heating means (11) which serves to generate superheated steam. In this design, axial steam delivery ducts (8') are located in the lateral curved regions of the autoclave jacket (1), said steam delivery ducts being separate from the remaining inner chamber (2) and having inlet orifices which are connected to a blower, the baffles (6) being provided, along their base-side bottom edge, with nozzle-like outlet orifices (9) for superheated steam, the size and the distribution over the length of the autoclave of said outlet orifices being chosen so as to achieve uniform steam delivery over the length of the autoclave from both sides into the inner chamber (2) which accommodates the feedstock (5), whilst extraction orifices (10) for steam are arranged in the upper region of the autoclave jacket (1).

'invention a trait à un autoclave pour traitement à la vapeur pressurisée d'une matière première (5) minérale poreuse, comprenant un intérieur cylindrique essentiellement horizontal enfermé dans une enveloppe d'autoclave (1), lequel a une chambre intérieure (2) qui loge la matière première (5) et un moyen de chauffage (11) qui sert à produire de la vapeur surchauffée. Dans cette conception,des conduits de vapeur axiaux (8') sont situés dans les régions courbes latérales de l'enveloppe de l'autoclave (1), lesdits conduits de vapeur étant séparés de la chambre intérieure (2) restante et dotés d'orifices d'admission qui sont reliés à une soufflante, les déflecteurs (6) étant munis le long de leur bord inférieur côté base d'orifices de sortie (9) genre ajutage pour la vapeur surchauffée, la grosseur et la distribution sur la longueur de l'autoclave desdits orifices de sortie étant choisies de manière à assurer une distribution de vapeur uniforme sur la longueur de l'autoclave depuis les deux côtés vers la chambre intérieure (2) qui loge la matière première (5), tandis que des orifices d'extraction de la vapeur (10) sont disposés dans la région supérieure de l'enveloppe de l'autoclave (1).

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