Abstract
Bubbling fluidization has been widely applied in process industries, such as power generation from coal, renewable energy production, gasification and pyrolysis. In this study, we attempted to predict solid flow patterns in a bubbling fluidized bed based on operational conditions, the air distributor and particle velocity. We first investigated the effect of operational conditions and the air distributor on solid/gas flow patterns, and investigate the correlations between solid/gas flow patterns with the solid mixing, solid and gas contact, and bubble behaviour within bubbling fluidized beds by using positron emission particle tracking (PEPT). A ‘Flow Pattern Parameter (FPP)’ is then proposed to identify the solid flow pattern in a bubbling fluidized bed. The ‘Flow Pattern Parameter (FPP)’ consists of particle kinetic energy, bed aspect ratio (H/D), pore size of air distributor, minimum fluidization velocity, and superficial gas velocity. The results show that solid flow patterns in the bubbling fluidized bed can be clearly classified based on the Flow Pattern Parameter. Different flow pattern corresponds to a certain range of the Flow Pattern Parameter.
| Original language | English |
|---|---|
| Pages (from-to) | 455-464 |
| Number of pages | 10 |
| Journal | Chemical Engineering Science |
| Volume | 117 |
| Early online date | 17 Jul 2014 |
| DOIs | |
| Publication status | Published - 27 Sept 2014 |
| Externally published | Yes |
Access to Document
- Fan_Identify_flow_patterns_Chemical_Engineering_Science_2014
NOTICE: this is the author’s version of a work that was accepted for publication in Chemical Engineering Science. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Chemical Engineering Science, Vol 117, September 2014, DOI: 10.1016/j.ces.2014.07.012. Eligibility for repository checked March 2015