2 replies to this topic

[Radionise]

Hi all,

I need to design a lab scale fluidized bed (i.e. around 1m tall and 20 mm in diameter, just a rough indication). It will be used to combust a biomass material.

I've operated both lab and pilot scale fluidized bed combustors before but I have no idea on the design itself.

As I'm aware, there are quite a few things that need to be considered here. For instance the design of distributor plate, and sizing of cyclone etc. Hopefully you'd be able to tell me briefly how I should proceed with the design.

Please advice. Thanks.

[ctilara]

Please specify what is your particle size. In-order to minimize wall effects tube or reactor diameter should be atleast 8 times the particle diameter. Richardson-Zaki equation is widely used and popular for calcuating superficial velocity (in liquid-solid fluidization). There are various theories behind gas-solid fluidization starting with Ergun equation to the latest.

The distributor design may depend on fluid you use, particle size, etc. If there is biomass involved, and oxygen (aerobic reaction) is required, the flow rate is critical too.

If you can provide specifics on the system, experts in the forum would be able to help you.

-CTilara

[rocky]

Hi,
Book on fluidization
" Fluidization Engineering, Second Edition By D. Kunii, Octave Levenspiel" would help you to understand and design Fluidized bed reactor.

Hi all,

I need to design a lab scale fluidized bed (i.e. around 1m tall and 20 mm in diameter, just a rough indication). It will be used to combust a biomass material.

I've operated both lab and pilot scale fluidized bed combustors before but I have no idea on the design itself.

As I'm aware, there are quite a few things that need to be considered here. For instance the design of distributor plate, and sizing of cyclone etc. Hopefully you'd be able to tell me briefly how I should proceed with the design.

Please advice. Thanks.