Method and device for the continuous gravimetric metering of...

G - Physics – 01 – G

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G01G 11/08 (2006.01)

Patent

CA 2534862

According to the invention, a method for the continuous gravimetric metering of flowing materials for burner systems, in which the instantaneous mass flow is determined and metering occurs by means of a metering unit (8), can be achieved by means of determination of the type of flowing material. The instantaneous heat output for the flowing material is determined from the type of flowing material and the heat capacity thereof and the mass flow determination. The output from the metering device (8) is regulated to match the set feed rate, depending on the instantaneous heat output. Also disclosed is a corresponding device (1), for the continuous gravimetric metering of flowing materials for burner systems (40), comprising a metering unit (8), by means of which the flowing material can be metered. Also provided is a material recognition system (20), for determining the type of the flowing material, an arithmetic unit (30), for determining the instantaneous heat output of the flowing material and a metering controller (10), by means of which the output from the metering unit (8) is regulated to match the set feed rate, depending on the instantaneous heat output.

L'invention concerne un procédé de dosage gravimétrique en continu de matières fluides pour installations de chauffage, procédé dans lequel on détermine le débit-masse instantané et l'on effectue le dosage au moyen d'un dispositif doseur (8), caractérisé en ce qu'on détermine la nature de la matière fluide. Sur la base de la nature de cette matière, de son pouvoir calorifique individuel et de la détermination de son débit-masse, on détermine le pouvoir calorifique instantané des matières fluides et l'on règle l'évacuation du dispositif doseur (8), de façon qu'elle soit adaptée au débit de consigne, en fonction du pouvoir calorifique instantané. L'invention concerne en outre un dispositif correspondant (1) pour le dosage gravimétrique en continu de matières fluides pour installations de chauffage (40), comprenant un dispositif doseur (8), permettant de doser les matières fluides. Il est prévu un système de détection de substances (20) permettant de déterminer la nature de chaque matière fluide, une unité de calcul (30) servant à la détermination du pouvoir calorifique instantané et une commande du doseur (10) au moyen de laquelle le volume de produit sortant du dispositif doseur (8) peut être adapté au débit de consigne, en fonction du pouvoir calorifique instantané.

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