|
|
MELE, J., SENEGAČNIK, A.
DYNAMIC SIMILARITY IN SCALING-UP FAST INTERNAL CIRCULATING FLUIDIZED BED GASIFIER
KOMUNALNA ENERGETIKA / POWER ENGINERING, 13
The article introduces research of particles dynamics in a cold flow model of FICFB (Fast Internal Circulating Fluidized Bed) biomass gasification process and its scale-up to hot industrial pilot plant. A laboratory unit has been made for the purposes of experimental research, which is three times smaller than the industrial pilot plant. Process was designed and experimentally tested on cold-flow model and scaled-up to hot industrial process. For a reliable scaling up similar flow conditions were achieved in both units. The results of the laboratory model shows as similar to those of the scale-up device if geometry, flow and Reynolds numbers are the same. Therefore, there is no need to bring an expensive full-scale gasification plant into the laboratory and actually test it. This is an example of "dynamic similarity".
MELE, J., SENEGAČNIK, A.
MINIMAL VELOCITY OF FULL FLUIDIZATION – A NEW DETERMINATION METHOD
KOMUNALNA ENERGETIKA / POWER ENGINERING, 20
The article introduces the method for characterization and control of fluidized beds with wide size distribution of particles. A laboratory unit has been made for the purposes of experimental research. Our goal is to make an automatic control protocol to find minimum necessary flow of fluidization fluid to run the process at full fluidization. On the basis of measured differential pressure and gas velocity, programme can find the optimal operation area. The method determines a single point among many points with almost same differential pressure and various gas velocities. This method can be used for controlling fully fluidized bed at minimum gas flows in CFB gasificators, fluidized bed furnaces, fluidized bed sanding machines, etc.
|