Patent ID: 6301546
Filing Date: 2001-10-09
Classification: B01J,C01B

Abstract:
A process for detecting, and monitoring, changes in the size of the particulate solids and resulting bubble size of a bed fluidized by ascending gases as caused by particle agglomeration or attrition, or both particle agglomeration and attrition during interaction or chemical reaction between said gas and solids which comprises:sensing the pressures across a segment of the fluidized bed at different vertical levels to obtain a differential pressure,collecting a plurality of the differential pressures to obtain a mean value and a standard deviation of pressure fluctuations about the mean value,repetitively collecting and processing the differential pressure at time intervals sufficiently short compared to the time period required for particle size change sufficient to cause process failure, and correlating, and comparing the standard deviation over time to obtain and track changes in the size of the particulate solids.