Critical Bed Height for Solid Circulation in a Compartmented Gas-Fluidized Bed

✍ Scribed by B. Bhattacharya; D. Sathiyamoorthy; V. Govardhana Rao; S. P. Mahajan

• Publisher: John Wiley and Sons
• Year: 2000
• Tongue: English
• Weight: 405 KB
• Volume: 23
• Category: Article
• ISSN: 0930-7516
• DOI: 10.1002/1521-4125(200012)23:12<1087::aid-ceat1087>3.0.co;2-9

✦ Synopsis

The influence of design and operating parameters on minimum upstream bed height required for steady solid circulation across a compartmented gas-fluidized bed has been studied. The partition plate in the compartmented bed is fitted with two pairs of Vvalve and riser with orifices in them. Silica sand of three different sizes, viz., 490 lm, 325 lm and 250 lm, has been used and the range of the aeration rate tested covers 1±3U mf through the bed, 5±60U mf through the V-valve and 0±60U mf through the riser. A model incorporating pressure balance across the circulation loop has been developed to analyze the experimental findings. Studies show the existence of a unique critical bed height for a given set of fluidization velocities through the bed, V-valve, riser and the size of the solids.