Page 56 - PIGNAT catalogue 2020 GB_092020

FLUIDIZATION GAS-SOLID DRYING

FGS/2000 GAS-SOLID FLUIDIZATION DRYING

➢ Study of the phenomena associated with the fluidization of solid particles in a
stream of air and of the kinetics of drying solid

Study of the air fluidization of solid particles
Characterize the solid to be fluidized
Determine the minimum fluidization speed

Study of the drying of solid particles in a hot air stream
Apply the wet air graph
Determine the kinetic graphs for linear phase and diffusion phase drying

Study of the thermal convection coefficient (option)
Compare the thermal convection coefficient for various medium configurations: in air, in a bed
of fixed particles and in a bed of fluidized particles
General specifications Instrumentation
• 3 temperature probes Pt100Ω.
• Air feeding circuit with filter, pressure reducing • Flowmeter 500 - 5000 L/h.
valve and manometers, isolating valve. • 2 Manometers.
• Metal dial thermometer.
• PVC column with silica gel to dry air. • Moisture transmitter.

www.pignat.com 100 - 240 V
• Air heating device equipped with an heating
Data acquisition resistance 480 W with safety thermostat 90 °C.

• Glass ND 200 fluidization chamber with bronze
fritted and solid particles bed.

• Glass cyclone. www.pignat.com
1ϕ - 50/60 Hz 4 bar
• Piezometric tube with rule. Dim: 125 x 55 x 155 cm - 70 kg

HR
7 TT5 TT1
8
Possibility of replacing The design of this unit allows the user to observe: TI4
the U-tube by an The gas-solid fluidization
electronic differential 6
pressure transmitter The drying of the solid particles in hot air and TT2 9 2
the thermal convection (if option). 3
4
Fluidization is achieved in the chamber 6. The
TH
minimum fluidization speed is determined by plotting
Options the curve of the pressure drop of the bed of particles
9 in function of the air flow 3. 5
- Thermal convection study TT3
The provision of the sintered disc ensures the good
- Differential electronic pressure dispersion of the air stream. 1
transmitter

The drying of solid particles in hot air occurs in the AIR
drying chamber 6.

The heating set point temperature is determined by The energy dissipated by a platinum filament
the controller on the control box. immersed in different media (fixed bed, fluidized bed
Other versions and only air) is used to calculate the heat transfer
The characteristics of the air inlet and outlet of the coefficient at the surface of the filament and showing
FGS/1000 drying chamber allow knowing the variation of the the importance of the fluidization during solid
Gas-solid fluidization simple water content of the solid and tracing the drying particles drying.
kinetics curves highlighting the linear and diffusional
FGS/4000 phase.
Fluidized bed drying autonomous
version with fan

Fluids & fluidization 55