Dynamics of Pressure Fluctuation in a Bubbling Fluidized Bed at High Temperature

2002 ◽  
Vol 41 (14) ◽  
pp. 3482-3488 ◽  
Author(s):  
Qingjie Guo ◽  
Guangxi Yue ◽  
Joachim Werther
Keyword(s):  
High Temperature ◽  
Fluidized Bed ◽  
Pressure Fluctuation ◽  
Bubbling Fluidized Bed

Horizontal Pressure Fluctuation in Bubbling Fluidized Bed

2003 ◽  
Author(s):  
Vesa V. Walle´n
Keyword(s):  
Pressure Gradient ◽  
Fluidized Bed ◽  
Pressure Fluctuation ◽  
Pressure Fluctuations ◽  
Middle Part ◽  
Biomass Combustion ◽  
Bottom Part ◽  
Pressure Transducers ◽  
Bubbling Fluidized Bed ◽  
Horizontal Pressure

Pressure measurements were conducted in a two-dimensional hot atmospheric bubbling fluidized bed reactor in the laboratory of Energy and Process Engineering at Tampere University of Technology. A set of six fast pressure transducers was used to detect the rapid pressure fluctuations inside the bubbling bed of the reactor. These pressure transducers were placed both vertically and horizontally into the reactor. From these measurements it was found that the vertical pressure fluctuation took place at the same time at different levels of the bed. Also the same fluctuation could be seen under the air distributor. The horizontal pressure fluctuation was found to vary both by place and time. At the bottom part of the bed the highest pressure peaks was found at centre of the bed. Most of the time there was a pressure gradient the highest pressure being in the centre of the bed. This gradient creates horizontal flow of gases from middle to the sides. The velocity of this flow varies with the size of the pressure gradient. The opposite effect can be found in the upper part of the bed. The highest pressure was no more in the middle part of the bed. Instead, it was found to be between the centre of the bed and left and right walls. The pressure was low at the walls but also rather low at the middle of the bed. There must be flow towards the walls and to the centre axis. These pressure fluctuations can provide an explanation for the well-known “wandering plume” effect. They can also give a tool to better describe the mixing inside a bubbling fluidized bed. This kind of tool is needed when biomass combustion is modelled in bubbling fluidized bed.

AGGLOMERATION BEHAVIOR IN A BUBBLING FLUIDIZED BED AT HIGH TEMPERATURE

2004 ◽  
Vol 191 (10) ◽  
pp. 1329-1342 ◽  
Author(s):  
QINGJIE GUO ◽  
TOSHIYUKI SUDA ◽  
JUNI'CHI SATO ◽  
GUANGXI YUE
Keyword(s):  
High Temperature ◽  
Fluidized Bed ◽  
Bubbling Fluidized Bed

Particle Attrition Characteristics in a Bubbling Fluidized Bed Under High Temperature and High Pressure Conditions

2014 ◽  
Vol 20 (4) ◽  
pp. 359-366 ◽  
Author(s):  
Jong-Ho Moon ◽  
Dong-Ho Lee ◽  
Ho-Jung Ryu ◽  
Young Cheol Park ◽  
Jong-Seop Lee ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Fluidized Bed ◽  
Bubbling Fluidized Bed ◽  
Particle Attrition

scholarly journals High temperature degradation by erosion-corrosion in bubbling fluidized bed combustors

2004 ◽  
Vol 7 (1) ◽  
pp. 71-80 ◽  
Author(s):  
Peggy Hou ◽  
Stuart MacAdam ◽  
Yan Niu ◽  
John Stringer
Keyword(s):  
High Temperature ◽  
Fluidized Bed ◽  
Erosion Corrosion ◽  
Bubbling Fluidized Bed

Investigating the flow structures in semi-cylindrical bubbling fluidized bed using pressure fluctuation signals

2019 ◽  
Vol 30 (6) ◽  
pp. 1247-1256
Author(s):  
Seyedeh Mahsa Okhovat-Alavian ◽  
Jamshid Behin ◽  
Navid Mostoufi
Keyword(s):  
Fluidized Bed ◽  
Pressure Fluctuation ◽  
Flow Structures ◽  
Bubbling Fluidized Bed
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