Method and apparatus for filling, blending and withdrawing...

B - Operations – Transporting – 01 – F

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20/11, 259/43.5

B01F 13/02 (2006.01)

Patent

CA 2008057

An apparatus and method are provided for blending solid particulate material. The invention employs equipment for enabling simultaneous drain and recycle, for selective top filling or bottom filling of the vessel, and for providing a bypass line for removing plugs which may form in the lift pipe. The apparatus includes a continuous blending unit which includes a sensor to measure the amount of material in the vessel by measuring its height or weight, and a controller, responsive to the sensor, for controlling the fresh particulate material feed rate and/or the material withdrawal rate so that the fresh material supply rate and the blended material withdrawal rate are proportioned to control the material level within the vessel to a desired level.

Appareil et méthode de mélange de matériaux particulaires solides. L'invention repose sur l'utilisation d'un équipement permettant le drainage et le recyclage simultanés de matériaux, pour le remplissage par le haut ou par le bas d'une cuve et pour constituer une dérivation pour enlever un bouchon qui pourrait se former dans le tuyau élévatoire. L'appareil comprend une unité de mélange en continu dans laquelle se trouve un capteur destiné à calculer la quantité de matériau contenu dans la cuve, en mesurant la hauteur ou le poids des matériaux, et un contrôleur sensible au capteur pour contrôler l'apport en matériau particulaire non usé et/ou la vitesse de retrait de matériau de sorte que l'approvisionnement en matériau non usé et la vitesse de retrait de matériau mélangé soient dosés pour contrôler le niveau de matériau dans la cuve..

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