Fluid bed dryer
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Fluid Bed Dryer
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The fluid Bed Dryer are most suitable for drying granular
crystalline, coarse or similar material in pharmaceuticals, fine chemicals,
dyes, food and allied products. The fluid Bed dryer is not suitable for
drying liquid or pasty materials.
• Fluid bed dryer is designed to introduce the hot air stream at the base of the product container which is filled with the Fluid Bed Dryer material. • Induced draught is created by means of blower and fresh air is sucked in to the unit. This hot air system expands the bed of material at certain velocity & creating turbulence in the product. The phenomenon is known as fluidization and offer conditions which are almost ideal for drying. • Fluidization produces full agitation of solid particles and since each particle gets surrounded by hot air, heat transfer is extremely high and uniform. • The product is dried fast without appreciable loss of heat. Filter bags prevent particles escaping from the dryer. • Fluid Bed Dryer occupy lesser floor space compare to conventional dryer and are very easy to operate and can dry material in least time as compared to tray dryer. • In fluid Bed Dryer, temperature distribution through out the product is uniform and the heat transfer rate is very high. High production rates are achieved due to reduce drying time. • As the product is in close contact with 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 minimized. Product Container: Made of S.S. 316 & provided with the S. S. bolliendr Sieve and perforated plate for proper air distribution. Container Trolley: Made up of S.S. 304 supported on caster wheels. Retarding Chamber: Specially designed S.S. 316 retarding chamber having special provisions for insertion of top spray nozzles with three different ports. Filter Bag Housing: Made up of S.S. 304. Consists of the finger shaped cotton filter bags. Explosion flap is provided at the back side of the explosion chamber to suppress the explosion pressure within the safety limits. Provided with pneumatic filter bag shaking mechanism. Top Dish: Made up of S.S.304. I. D. Fan Assembly: Centrifugal I. D. fan with S. S. 304 impeller blades & S. S. 304 casing. Mounted on top dish. Plenum Chamber: Made up of S. S. 316 provided with the dished bottom & the drain valve. Container Lifting mechanism will be fixed outside. Container Lifting Mechanism: Provided with pneumatic container lifting & sealing mechanism. The Rear Chamber: a) Made up of S. S. 316. Provides the passage for inlet air. Standard filters of 5 & 20 micros particle size are provided. b) Steam heating or electric heating battery. c) Can be provided three stage filtration arrangement. Heating Battery Made up of S. S. 304 Steam Heaters. Blower Motor: 3000 RPM, 380 volts flame proof motor. Control Panel: Electro mechanical or PLC base |
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Fluidized
Bed Dryer
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Keeping pace with latest technology, we manufacture, supply
and export Bhagwati fluid bed dryers, which are based on the concept of GMP
Regulation. These fluid bed dryers are recognized amidst our clients for
superior functionality. They consume lesser drying time in comparison to
conventional model. Apart from this, these dryers require minimum involvement
of manual labor, maintenance and utilize modular construction techniques to
offer flexible installation options.
The process unit is available in 2 pieces made of SS-304/316 stainless steel. Through mixing of dry powders, agglomeration & drying are carried out in one unit of these fluid bed dryers. Salient Features: The salient features of Bhagwati Fluid Bed Dryers are mentioned below: 1) Process Unit • The process unit is made of SS-304 Grade stainless steel • All process contact parts are made of SS-304 grade • The finish employed externally will be all welds ground back and polished into the surrounding materials • All of the external surfaces of the dryer and all non contact/sight parts will be prepared with a uniform fine texture Matt finish • All of the product contact surface (SS-304) are mirror finished Special attention is paid to reduce any source of material Entrapment by mirror polishing flush all welds to create crevice free profiles both externally as well as internally • The expansion chamber possessing filter finger bags & dished end are made of single piece construction from SS-304/316 steel. Below that is the retarding chamber made out of S.S. 304 and locked with the explosion chamber through clamps. The length of retarding chamber is carefully designed to provide extra large heat exchange for rapid drying • A central drain is provided in the base to release the wash water • The base is specifically designed for air vortex effect and for providing added strength. 2) Bowl/ Product Container • Product bowl is manufactured in conical shape using SS-304 grade stainless steel having stainless steel mesh support along with fine finish air mesh • The product container trolley is of tubular frame made form SS-304 pipe mounted on polypropylene caster wheel (2 fixed & 2 Swivel for maneuverability) which lends rigidity to carry the product container with the charged load • The batch loading capacity is always higher in case of Bhagwati Fluid Bed dryer due to better fluidisation by varying the frequent shaking of finger bags. Shaking period can vary according to the nature of products. 3) Rubber Gasket • A solid ‘D’ shape food type silicon rubber gasket is also provided in the groove of flanged joint between the product container and retarding chamber. It prevents any leakage of air with fines during operation 4)Uniform Lifting Of Container • The product container is lifted by specifically designed arrangement with the help of 1 centrally fitted pneumatic cylinder, that ensures uniform lifting all across the periphery of container which ultimately provides uniform upward pressure to solid ‘D’ shaped rubber gasket, thereby preventing any leakage during operation 5)Auto Shaking Device • Pneumatic cylinder is used for auto shaking device of finger bags and is fitted with a wire rope made from SS 304 guided by pulleys thus rendering the shaking extremely efficient. It also brings down the finger bags to such a level that these can be very easily inspected form the bottom of retarding chamber. If the shaking is not efficient, the particles will be retained in the finger bags and there will be no proper fluidisation resulting in formation of lumps. |
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A cabinet tray dryer is an
enclosed insulated chamber in which trays are placed on top of each other in
trolleys. Tray Dryer are used where heating and drying are essential parts of
manufacturing process in industries such as Chemicals, Dye stuff,
Pharmaceutical, Food Products, Colors etc. The material to be dried either
wet or solids are placed in the trays. Heat transfer is by circulation of hot
air by electric heaters or steam in radiator coils. Blower fans are installed
inside to ensure proper circulation and transfer of heat. A control panel to
control the temperature and other parameters is fixed outside the dryer.
These dryers are available in Mild Steel, Stainless Steel or construction.
Tray dryer is used for drying of pigments, food, bakery, electrodes, chemical
and plastic powders.
CONSTRUCTION : The dryer is of robust construction built on formed angles of 3mm thick sheet and suitably reinforced with angles and sections. The dryers external walls are manufactured from 1.6mm thick Stainless Steel sheets of 304 quality. The internal of the dryer is built of 1.6 mm thick S.S 304 quality sheets. The internal structure is fully TIG welded and all the internals have ground smooth surfaces. It is insulated with minimum 50 mm thick glasswool insulation and Cladded with S,S, Polished sheets. The dryer is having a fresh air inlet through 20 Micron PP cloth filters and a adjustable air outlet flap and a door at the front. The door is explosion proof and is locked with the help of spring loaded ball latches with suitable pressure. Door lips are having Neoprene rubber Gasket to prevent leakages. Finishing The design and manufacture of the dryer is of high standard of GMP and has an aesthetic look. It is buffed externally to 150 grit matt finish and internally buffed to 220 grit mirror finish. Electrical Heating: The Air inside the Tray Dryer is heated by "U" tube S.S.304 air heaters each of 1 KW.The heaters are fitted on the sides of the dryer to facilitate uniform heating. Maximum temperature attained inside the dryer is 100' C and will be indicated and controlled by a Digital Temperature indicator cum controller over full range of heating load. Total heating load for it will be
The heaters will be inserted inside tubular pipe to prevent it from becoming RED HOT. The terminals of the heaters will be brought outside the dryer to make it more safe for operations for solvent based products. Air Circulation : Air inside the dryer is circulated by one heavy duty axial flow S.S.304 or alluminum blower fitted on a shaft of and driven by l H.P. through belt. The special design of the Blower ensures uniform air circulation so that there is uniform air current over the entire charge loaded in the Trolley inside the dryer. The working of the motor is indicated by lamps in the control panel. Trays : Trays will be manufactured from 1.6 mm SS 304 sheets.Its dimensions are 32" x 16" x 1 l/4". The Trays have rounded corners with' mirror finish from inside and outside. SS 316 quality is available on demand. |
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Applications:
Multi Mill dryer is widely used for wet and dry granulation, pulverization etc. in Pharmaceuticals, Chemicals, Cosmetics, Ceramics, Colors, Dyestuff, Food products etc. It also finds application in Pesticides, Fertilizers, Spices, Detergents, Insecticides, Plastic and Resins Industries. Operation : It operates on the principle of variable force swing beaters having both knife and impact edges rotating within a selected screen to get the required size reduction. Material fed in the hopper, goes down to the processing chamber where it moves to the periphery and passes through the screen radially and tangentially. Finally the processed material gets collected in the container kept below the processing chamber.Output and quality of the final product depends on three main factors : (1) Shape of beaters (knife/impact edges), (2) Speed and (3) Screen. Description: Unit consists of S.S. 304 quality hopper and processing chamber (can be provided is S.S. 316 quality at extra cost) with beaters assembly, motor, reversible switch, DOL starter, four speed step pulley, Suitable screen with painted pillar mounted on base plate, with castors. Salient Features: Direction of beaters can be changed by reversible switch from knife to impact forward and vice-versa. All contact parts can be easily and quickly dismantled and cleaned. Machine is designed for continuous operation. Cylindrical screen for higher output. Castors provided for mobility.Flame proof electrical can be provided at extra cost. Beaters and scrapper blades of SS 410 quality are hardened and hard chrome plated. Technical Specifications:
Optional Sieves On Demand SS Perforated Screen sizes (Holes dia in mm) (a) 0.5, 1.0, 1.5 (b) 2,3,4,5,6 (c) 7,8,10,15,20,25. SS Wire Mesh Sieve (a) 4,6,8,10,12,14,16,20,24,30,40,50,60 (b) 80,100. |
CLEANING
OF FLUID BED DRYER
ObjectiveTo carry out the drying operation in proper manner and to avoid the cross contamination of the granules.
Cleaning Materials
Cleaning Agent : Water
Cleaning equipment : lint free duster, nylon scrubber
Method of Cleaning
Procedure for Product to product change over
Clean the body of the drier and plenum with a dry clean duster. Then wipe it with a duster soaked in 0.1% teepol solution followed by a duster soaked in water.
Detach finger bag from hook by opening perplex windows in the retarding chamber
Unclamp the fixing bolts of retarding chamber & allow it to rest on the trolley. Take out trolley along with the finger bag and retarding chamber.
Remove the finger bag & bowel
Dedust the individual finger chamber of finger bag & keep it in a polythene bag. Send it for laundering
Take retarding chamber along with trolley and bowl with hot water scrubbing with clean nylon scrubber. Then wash them with 0.1% teepol solution, rinsing thoroughly with hot water followed by water. In case of sticky powder use steam
Drying
Wipe out the body of FBD retarding chamber, trolley & bowl by using a clean dry lint free duster. Further dry by running FBD at 70°C (without material) for 15 minutes.
Assembling
Fix the laundered finger bag in a metallic hanger around the retarding chamber. Clamp the retarding chamber on the body with the fixing bolts. Lift the bottom of FBD and seal the trolley with bowl to the retarding chamber.
For Batch to Batch change over
Clean the body of the driers & plenum with dry duster
Clean the interior surface of the retarding chamber bowl with a clean dry duster
Clean the interior surface of the retarding chamber bowl, trolley.
De-dust the fingers of the finger bag.
Note
If the cleaned FBD is not used with in 24 hours after cleaning or there are signs of dust or powder settled on FBD, then dedust the bowl retarding chamber & body by using a freshly laundered lint free duster.
Cleaning schedule
During every product & batch change over
Status label
Replace the “To be Cleaned” status label with “Cleaned and Ready for Use” label
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