FLUILD BED DRYER : SPECIFICATION FOR 120 KG FBD GMP  

OPERATION
Fluid Bed Dryer is designed to introduce the hot air stream at the /base of the product container which is filled with the material.  Induced draught is created by means of blower and fresh air is sucked into the unit.  This hot air stream expands the material at certain velocity and creating turbulence in the product.  The phenomenon is known as fluidisation and offer conditions which are almost for drying.  Fluidisation produces full agitation of solid particles by hot air, heat transfer is extremely high and uniform.  The product is dried fast without appreciable loss of heat.  Filter bags prevent particle escaping from the dryer.

SUITABILITY
The conventional drying method of drying product in tray dryer is rather inadequate and troublesome.  They occupy large floor pace, have very high drying time, are labour intensive and offer uneven drying.  On contrast fluid Bed Dryer occupy comparatively lesser floor space, are very easy to operate and can dry material in least time as compared to tray dryer.

In Fluid Bed Dryer, temperature distribution throughout the product is uniform and the heat transfer rate is very high.  Due to the reduced drying time high production rates are achieved.

As the product is in close contact with the drying air at low temperature, and also for short duration, the physical and chemical properties of the products are generally not effected and therefore the dryer can effectively be used for heat sensitive products.  Due to the continuous movements of product during drying, lump formation, case hardening etc. are minimised.

The Fluid Bed Dryer are most suitable for drying, granular, crystalline, coarse or similar material in pharmaceutical, fine chemical, fine chemicals, dyes, food, allied products. The Fluid Bed Dryer is not suitable for drying liquids or pasty  materials.  

Steam  Heated unit suitable to dry about 120-130 kgs.of wet material (having bulk density of 0.6 gm/cc) per batch Product Container, Perforated Air Distributor Plate and Retarding Chamber will be made out of S.S.316 2B Quality Salem Sheet.  All the other air process parts will be made out of SS 304 2B quality salem  sheets.

The dryer will be provided with 15 HP Crompton, make 2800 RPM, Electric Motor, Control & Power panels temp. indicators, multi stage filteration unit for filtering process air through fine fine filter, P.P. filter bag for exhaust air, Positive Earthing Arrangement, explosion flap etc.

Control Panel : Pre-wire control panel, indicate Digital Timer, Digital Temperature Indicator cum controller, Sensor, star delta starter, Indicating Lamps, Fuses, Amp. Meter, Volt Meter , Main MCB, Solenoid Valve for pneumatic fitting , selector switch. Etc.

Model FBD – 120 : Steam Heated with Digital Timer & Control.

120 KGS. GMP MODEL (Electric heated)

(Contact parts SS 316  Rest SS304)

Spares Recommended
S.S.316 Quality Product Container with perforated air
Distributor plate & dutch weave with SS Steel trolley
Filter bags of P.P. cloth – 2 Nos.(Up and down)
Set of Neoprene (White) Rubber Gasket


OPTIONALS (at additional prices)
EXTRA Price for providing penumatic lifting arrangement
For product container with air filter and control switch. (compressed air required 2-3 CFM at 5 Kgs/cm2g)

EXTRA Prices for providing automatic pneumatic bag
Shaking mechanism complete with timers, solenoid valve, Accessories etc.
0.3 Micron Hepa Filter   
Solid Flow Monitor

SPECIAL FEATURES
Uniformity in drying and reduction in drying time.

Atmospheric inlet air is filtered by means of multi stage filters and micro filter 0.5 microns to prevent any fine dust to pass through the product.

Digital temperature indicators cum controller is provided with the unit to indicate the inlet and outlet air temperature as well as to controller the present inlet air temperature. Air suction and discharge dampers, provided to control the inlet and outliet air flow. Electrical variator system is provided to control outlet damper before blower scroll. An explosion safety safety flap of adequate capacity at the rear of dryer and an positive earthing point to prevent static charge in the machine. Timer provided to set the process time which will cut off the motor supply after pre-set time period.

TECHNICAL SPECIFICATION
Working capacity of dryer in kgs. At 0.6 gms/cc bulk density.   : 120
Working capacity of product container in lits.   : 220
Total volume of product container in lits. :  440  
Blower motor HP (Hindustan, Crompton make)    :  15
Heating Cap. In Kcal/Hr.    :  30,700
(Approximate steam consumption based on dry saturated steam :130. (steam pressure @ 3kgs/cm2)

You will have to provide following :
Level floor at site.  
Steam connection along with required steam fitting and self operated temperature control valve. (In case of steam heated model only) Required electrical connection up to the machine through suitable isolating switch.` 

Material of Construction (GMP MODEL) : (120 KGS)  
Blower : S.S.304 housing 5 mm. Thk, & dynamically balanced S.S.304 fan.
Top Dome : 5 mm. Thick S.S.304 material.  
(C) Bag Housing : 10 swg. S.S.304 material.  
Retarding Chamber : 3.2 mm. S.S. (316 Q.) material.  
Product container : 2.5 mm. S.S. (316 Q) material  
Lifting Housing : Base Plate – 4 mm. Thick S.S.304 Q material.
Housing – 6 mm. Thick S.S.304 Q material  
Lifting Assembly – Stainless steel

Heating Chamber
In case of steam Heated Model S.S.Finned tube type Heat exchanger will be provided to raise temperature around 80 to 120oc.
Safety Flap chamber : Structure will be made out of S.S. angle and same will be covered with 12 swg. Stainless Steel Sheet.  
Panel : 14 swg. Stainless Steel material.  
Base & side support : Mild Steel Channel (S.S.claded)

Note
For pharmaceutical applications it is necessary that air contact parts viz. Tapered jack chamber, rear chamber and heat exchanger should have material of construction S.S.304.  Process air before entering product container passes through these parts at very high velocity.  If in case the parts are of mild steel they may get corroded after some time &  may lead to contamination of final dried product.