Use of piezoelectric pressure transducers to determine local solids mass flux in the riser of a cold flow circulating fluidized bed

• Published in: Powder technology Vol. 203; no. 1; pp. 86 - 90
• Main Authors: Spenik, James L., Ludlow, J. Christopher
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Amsterdam Elsevier B.V 25.10.2010; Elsevier
• Subjects: Applied sciences; Chemical engineering; Circulating; Circulating fluidized bed; Exact sciences and technology; Fluidization; Fluidized beds; Flux; Impingement; Miscellaneous; Piezoelectric pressure transducer; Piezoelectricity; Risers; Sampling; Solid-solid systems; Solids distribution; Transducers; Solids distribution; Circulating fluidized bed; Piezoelectric pressure transducer; Design; Samplings; Fluidization; Sampling; Riser
• ISSN: 0032-5910; 1873-328X
• DOI: 10.1016/j.powtec.2010.03.031

A method to determine local mass flux measurements within the riser of a circulating fluidized bed using the rate of impingement of particles on the surface of a piezoelectric pressure transducer is described. Statistically designed experiments with various solids circulation rates and riser gas velocities were conducted in the riser of a cold flow circulating fluidized bed to verify the accuracy of the method. Also, various techniques to relate the impingement rate to mass flux were employed. It is believed that this method delivers results in situations where more standard methods, such as isokinetic sampling, fail. A method to determine local mass flux measurements within the riser of a circulating fluidized bed using the rate of impingement of particles on the surface of a piezoelectric pressure transducer is described and verified using statistically designed experiments. It is believed that this method delivers results in situations where more standard methods, such as isokinetic sampling, fail. [Display omitted]