Method and device for measuring circulation quantity of bed...

F - Mech Eng,Light,Heat,Weapons – 23 – C

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F23C 10/02 (2006.01) F23G 5/30 (2006.01) F23G 5/50 (2006.01) G01F 1/00 (2006.01)

Patent

CA 2592308

In order to perform quantitative evaluation of the actual quantity of circulating bed material extremely simply and to enhance the accuracy of comparison of the results of thermal balance examined through simulation with the actual operation results, the time required for the bed material deposited in a downcomer (5) to reach an upper predetermined height H1 from a lower predetermined height H0 is measured when fluidizing air supply to an external heat exchanger (7) is stopped, and then the flow rate of the bed material is determined as the circulation quantity from the time and the quantity of deposited bed material based on the inside diameter D of the downcomer (5).

Dans le but de réaliser très simplement une évaluation quantitative de la quantité effective en circulation d'une matière formant lit et d'améliorer la précision de la comparaison des résultats du bilan thermique obtenus par simulation aux résultats pratiques, le temps mis par la matière formant lit déposée dans un déversoir (5) pour atteindre une hauteur supérieure prédéterminée H1 à partir d'une hauteur inférieure prédéterminée H0 est mesurée après interruption de l'alimentation d'un échangeur de chaleur externe (7) en air fluidisant, et le débit de la matière formant lit est ensuite déterminé comme la quantité en circulation à partir de ce temps et de la quantité de matière formant lit déposée, en fonction du diamètre intérieur D du déversoir (5).

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