6 replies to this topic

[StefanCh]

I would be thankful, if you link any literature in English or in German regarding fluidized beds and residence time of particles in fluidized beds. Link or point me to some sources, please.
my topic is: Investigation of the residence time of particle populations in a continuous fluidized bed channel.

Literature I already have is (by authors): Moerl, Lothar; Levenspiel;

Thanks for assisting me in advance!
-Stefan

[ankur2061]

Stefan,

The following could be very useful to you on Fluidized Beds and residence times of particles in fluidized beds:

Chapter 8, Fluidized Bed Dryers, "Handbook of Industrial Drying" by Carl W. Hall

Hope this helps.

Regards,
Ankur.

[StefanCh]

Thank you for this source, I checked it today and got some useful information out of it.

However, I would use more literature on residence time.

-Stefan

[thorium90]

Hi,
I know this topic is old, but I thought I could add abit, if it is useful... My Prof research group is doing the following research,
http://www.eng.nus.e...ochure-WANG.pdf

The residence times can be found from computer simulations using FLUENT.

Edited by thorium90, 28 January 2013 - 09:35 AM.

[StefanCh]

Thank you thorium, however I finished my bachelor thesis in the end of August 2012.

I no longer need this kind of information, but it is nice to see what you people are doing.

I made just a real simulation of a fluidized bed with continuous operation, because I was short on time. A software simulation would take around 6 months to just feed the input data into the computer. According to one of my professors a video of two minutes software simulation takes around four weeks to feed the data for the simulation.

Does the computer model with all the green and red particles represent a real process?

[thorium90]

Its calculated from the software using FLUENT by Ansys and EDEM, discrete element method.

So how was the simulation done for your thesis? What was it about?

[StefanCh]

Simulation was not done. Real experiments were conducted on an experimental plant. The plant works as a dryer as well, when the heater system is switched on. fluFluidized bed chamber length to width 1000x200 mm. I used gamma aluminium oxide spheres as material fed into the chamber. I used tracer material which was basically the same material as the mainstream, but only colored with eggpaint. Certain ammount of tracer material was inserted at a given time in the system and then samples were taken. In each sample I counted the tracer particles. For certain bed dimensions different experiments were conducted with different size spherical particles. Then the data was analysed and conclusions were made about the residence time distribution of the tracer material in the different cases.

I also used DEM.

Edited by StefanCh, 31 January 2013 - 04:24 PM.