What is a fluid bed dryer?
Fluid or Fluidised bed dryer is a kind of equipment used extensively in the pharmaceutical industries to reduce the moisture content in raw ingredients like powder and granules. The working principle of this equipment includes fluidization of the fed materials.
What does a fluid bed do?
Fluid bed technology is used for cooling, heating and drying of bulk solids materials. Fluid bed heat exchange takes place by passing a gas (most commonly air) through a perforated distributor plate which then flows through a layer (bed) of solids.
What is the difference between FBD and FBP?
What is the Difference Between FBD and FBP? FBD is used for only drying and, FBP is used for Granulation, Drying, Agglomeration, and Coating Process.
How do you clean a fluid bed dryer?
Dip the FBD bag in Potable water for about 1 hour & wash thoroughly with Potable water from both inside as well as out side. Finally rinse with about 50 liter purified water & dry then fill “FBD Bag Log Book” (Annexure-I). 5.5 Wipe off all residual powder from FBD bowl and rinse with potable water.
What is the principle of FBD?
The Principle of Fluidized Bed Dryer:
If air is allowed to flow through a bed of solid powdered material in the upward direction with the velocity greater than the settling rate of the particles, the solid particles will be blown up and become suspended in the air stream.
What is CFM in fluid bed dryer?
the drying bowl and the exhaust air temperature) suggested that the air velocity used for process 1. (3000-3300 cubic foot per minute (cfm)) was. excessive for the amount of material in the fluid bed. dryer.
What are the advantages of a fluidised bed dryer?
The advantages of fluid bed drying include low investment and maintenance costs, large-scale continuous production, lower air temperatures than spray drying and a relatively short drying time compared to freeze drying and vacuum drying.
Why is FBD capacity in KG?
Why FBD (Fluidized Bed Dryer) capacity measured in Kg and RMG (Rapid Mixer Dryer) capacity measured in Litre? It’s a design issue. The main functionality of RMG is “holding, mixing and granulating of standard volume”. The bulk density is product specific and may not be same for all products.
How is FBD CFM calculated?
Flow rate = Velocity x Area of cross section. Total capacity required = 884 / 0.8 = 1105 m3/hr = 651 CFM.
Why FBD is most widely used dryer in pharmaceuticals?
Fluid bed dryers provide the best solution for drying many products, but especially products within the pharmaceutical industry. With the system, inlet air temperature can be controlled so that the correct amount of moisture evaporates from the surface of the granule.
What is the disadvantages of fluidized bed?
Disadvantages of Fluidized Dryers
1. High pressure drops results as a result of the need to suspend the entire bed in gas which equally leads to high energy consumption. 2. Requires increased gas handling due to extensive recirculation of exhaust gas for high thermal efficiency operation.
What is RMG end point?
Endpoint can be defined as a target particle size mean or distribution. Traditional Methods. a) Power Consumption.
What is SFM in FBD?
Solid Flow Monitor (SFM) is advanced equipment to monitor and control flow rate, resulting in a smooth and efficient flow of material. Solid Flow Monitor test reliably detects filled bag failure in FBD and helps in preventing product loss. SFM is located in the exhaust duct of the Fluid Bed Granulator.
What is Torque in RMG?
Torque is a measure of the amount of energy needed to rotate the impeller. Therefore, torque depends on the resistance of the mass against rotation of the impeller (2–4). In the wet mixing process, changes in torque occur as the result of a change in the cohesive force of the granules in the wet powder bed.
What is ampere load in RMG?
What Is Ampere Load In RMG? Ampere load is the current which is used by the chopper and impeller for the rotation of powder or granules. Ampere load is high at the start of the process and then gradually decreases as the load on the motor decreases.
What is the end point in FBD?
Endpoint can be defined as a target particle size mean or distribution. a) Power Consumption. Power consumption of the mixer motor for end-point determination and scale-up is widely used because the measurement is economical, does not require extensive mixer modifications and is well correlated with granule growth.
What is tip speed in RMG?
Blade Speed (tip speed), measures how far a point on the outer most edge of the disperser blade travels in a given amount of time. You may remember from early math classes that the circumference (perimeter) of a circle is equal to: Circumference = Π × D.
What is impeller load in RMG?
How is RMG capacity calculated?
Claimed capacity is provided by vendor in liters and to calculate capacity in kgs,first calculate bulk density of powder to be mixed and then it is multiplied by capacity in liters. claimed capaciy in liters is 400 liter and bulk density is 0.8 then capacity in kgs is 400*0.8=320kg.
What is purging air in RMG?
What is Purging Air in RMG? Generally, purging air is used to flush the industrial process equipment with clean air. Purging Air helps to keep the surfaces of RMG (Granulation Machine) clean and help in maintaining its effective performance.
Why is RMG capacity in KG?
What are the critical parameters of RMG?
(RMG)
- Pre-binder addition mix time.
- Impeller speed and ON time.
- Chopper speed and ON time.
- Binder fluid temperature.
- Binder addition rate and time.
- Post-granulation mix time.
What is FBD principle?