Control system for and method of combining materials

Details Control system for and method of combining materials Control system for and method of combining materials

B - Operations, Transporting

01

F

B01F 15/04 (2006.01) B01F 13/10 (2006.01) F04B 13/02 (2006.01) G05B 19/19 (2006.01) G05D 11/13 (2006.01) B01F 5/04 (2006.01)

Patent

CA 2620331

An apparatus (10) and method for combining multiple materials into a stream. The multiple materials may include both a major material and one or more minor materials. The minor materials are added using inlet tubes (141) . The major and minor materials are added at transient or steady state flow rates, depending upon a command from a control signal . The apparatus and method utilize a control system which does not have flow control valves, flow control feedback loops or a dynamic mix tank. The actual flow rates track the commanded flow rates, but deviate by an error. The claimed arrangement provides a time-based error believed to be unobtainable in the prior art.

La présente invention concerne un appareil et un procédé de combinaison de plusieurs matières sous forme d'un flux. Les multiples matières peuvent comprendre une matière principale et une ou plusieurs matières secondaires. Les matières secondaires sont ajoutées au moyen de tuyaux d'introduction, les matières principale et secondaires sont ajoutées à un débit d'état transitoire ou stable, en fonction d'une commande provenant d'un signal de commande. L'appareil et le procédé comprennent un système de commande qui ne comporte pas de vannes de régulation du débit, de boucles de rétroaction de la commande du débit ni de cuve de mélange dynamique. Les débits réels suivent les débits commandés mais dévient d'une erreur. Le système selon l'invention utilise une erreur instantanée et temporelle qu'on supposait ne pouvoir atteindre dans l'art antérieur.

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