Method and device for the thermochemical conversion of a fuel

Details Method and device for the thermochemical conversion of a fuel Method and device for the thermochemical conversion of a fuel

B - Operations, Transporting

01

J

B01J 8/18 (2006.01) F23C 10/12 (2006.01)

Patent

CA 2597520

The invention relates to a method for the thermochemical conversion of a fuel, comprising the following steps: a) provision of a fluidised-bed reactor with a central first combustion zone (1) and a second combustion zone (7) that is separated from the first by flow conduction means (2, 15), the first combustion zone (1) being provided with a supply opening (16) for supplying fuel and a unit (3), which lies opposite the supply opening (16) on the floor (B) of the fluidised bed reactor, for deviating a stream of fuel into the second combustion zone (7); b) feeding of fuel through the supply opening (16), so that a stream of fuel forms that is directed towards the floor (B); c) deviation of the stream of fuel on the floor (B) into the second combustion zone (7), so that the stream of fuel is guided in an essentially opposite direction; and d) additional deviation of the stream of fuel in the vicinity of the supply opening (16), causing the stream of fuel to be returned to the first combustion zone.

L'invention concerne un procédé de transformation thermochimique d'un combustible comprenant les étapes suivantes : a) préparation d'un réacteur à lit fluidisé comportant une première zone de combustion centrale (1) et une seconde zone de combustion (7) séparée de la première par des moyens de guidage d'écoulement (2, 15), la première zone de combustion (1) présentant une ouverture d'alimentation (16) pour l'amenée du combustible, et un dispositif (3) prévu au fond (B) du réacteur à lit fluidisé, à l'opposé de l'ouverture d'alimentation (16), servant à dévier le courant de combustible dans la seconde zone de combustion (7), b) amenée du combustible par l'ouverture d'alimentation (16), de manière à former un courant de combustible dirigé vers le fond (B), c) déviation du courant de combustible, au fond (B), dans la seconde zone de combustion (7), de façon que le courant de combustible soit guidé dans une direction sensiblement opposée et, d) déviation supplémentaire du courant de combustible au voisinage de l'ouverture d'alimentation (16), de façon que le courant de combustible soit recyclé dans la première zone de combustion.

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