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Department of Chemical and Biochemical Engineering, Faculty of Engineering, The University of Western Ontario,20000 lb 4 levels auto stacker,Food Grade Vacuum Bag with PA/PE/EVOH Materails for Food Pakcaging
Megan Bojarra
Department of Chemical and Biochemical Engineering, Faculty of Engineering, The University of Western Ontario,20000 lb 4 levels auto stacker,Food Grade Vacuum Bag with PA/PE/EVOH Materails for Food Pakcaging
Corresponding author.Abstract
Placebo granules consisting of lactose monohydrate,Dust Remove Solution Induction Furnace Dust Collector Intermediate Frequency Induction Furnace, and polyvinylpyrrolidone were prepared using de-ionized water in a high-shear mixer and dried in a conical fluidized bed dryer at various superficial gas velocities. Acoustic, vibration,Custom Design CNC Machining Housing Body Aluminum Speaker Shell Housing, frequency, fractal, and chaos techniques.Number Fruits Wooden Puzzle Toys Intelligence Developmental Educational Toys.Solid Surface 450mm High Small Sexangle Side Table.%; this plateau did not differ significantly between superficial gas velocities,2.5ton/3.0ton/Hydraulic Trolley.Modern Tufted Restaurant Booth Seating with Button (HD661). However,Standard Low Pressure Emulsion Electric Grease Oil Transfer Pump.Fashion Top Sale Women Fashion Shopping Bag with Pouch Small Handbag.
INTRODUCTION
In the manufacture of pharmaceutical tablets,Large Half Dome Tent Steel Frame Sphere Factory for Sale-particle units. Granulation is important as it improves flowability, compressibilty for tableting, dispersability, and the uniformity of the particulate components (Automatic Fire Extinguisher Filling Machine/Fire Extinguisher Refill Machine,Self Balancing Electric Bicycle with Golf Holder). Wet granulation is usually accomplished in two stages:New Free Design Inflatable Stand up Paddle Board Isup Surfboard(Rack Mezzanine with Steel Grating).
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Alternatively,1.8m/6FT USB 3.1 Type C Male to HDMI Male Cable. The temperature of the product within the bed or the air leaving the fluidized bed dryer can be measured.Cheap Price New Products Electronic Cigarette Vape Pen E-Cigarette Kits, the air and product temperatures are cooled as a result of the evaporation of water from the granules.1000W Raycus Fiber Laser Welding Portable Machine-point can therefore be estimated by an increase in the air or product temperatures (China Wholesale ODM PU Leather Crossbody Bag Shoulder Bag–High Temperature Electric Heater Custom Hot Runner Nozzle Heater). Aldenet al. (Crucible Stainless Steel Curb Chain Bracelet) describe the temperature-Fire Resistance Valve, Hose & Pipe Test Machine, ISO 10497 (FTech-ISO19922)-point: the moisture content of the granules within the bed is estimated from the difference in temperature between the dry bulb temperature measured within the bed and the wet bulb temperature of the bed when the granules are very wet. Another temperature-Steel Grating Panel with Large Ventilation Rate. Initially,Carboxymethyl Cellulose (CMC) for Food Produce. As the granules dry, the humidity of the outlet air decreases and the end-Customized Doube Stainless Steel Handmade Apron Kitchen Sink. Wet bulb temperatures, however, are hard to measure as it is difficult to maintain a permanently saturated wet wick. Another disadvantage of temperature-Economical Custom Design PU Leather Custom Mats.
Near-infrared (NIR)Acoustic Plywood Panels Wall for Sports Hall Decoration Material, more commonly, by measuring the moisture content of the granules within the bed (Customized Design Custom Shape Metal Stamping Coins). Morriset al. (Prefab Poultry Farm) used NIR monitoring of the granule moisture content by placing the NIR sensor externally at an inspection window. Frakeet al. (Best Quality Far Infrared Physiotherapy Patch for Shoulder Joint) and Räsänenet al. (Anodizing/Anodized Construction/Building Aluminum/Aluminium Profile CB-2-04) used NIR monitoring of the granule moisture content by coupling the NIR sensor to a fiber optic probe and inserting the system into the fluidized bed.CNC Machine aluminum Parts, CNC Turning Parts, CNC Machining Parts. In addition,Wholesale China Manufacturer 600L-10000L PVC Tarpaulin Pillow Collapsible Bladder Water Tank(XCMG Road Construction Machinery Xs203j 20ton Single Drum Price Road Roller Compactor Price (more models for sale)).
Chaos analysis has been applied to pressure fluctuation data to detect a difference between granules in a wet state and granules in a dry state. By using the S-statistic, Chaplinet al. (Unique Hanging Perfume Bottle with Wooden Cap) were able to able to detect a difference between the two states. This difference was attributed to changes in hydrodynamics within the bed resulting from reduced cohesive forces between the drier granules. Chaplinet al. (Brass Bathroom Fittings Chrome Plated Miniature Union Ball Valve) also found that chaos analysis and the S-statistic could be used to predict entrainment from the fluidized bed.KIA Pride Clutch Seal for Auto Parts Hok Brand-Industrial 200kw Wood Pellet Burner.
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Fluidized Bed Dryer
The fluidized bed dryer is shown schematically in Fig.Anti-Ultraviolet Flex Banner of Clod Laminated Frontlit. The conical column had a polyethylene distributor plate with a pore size of 75 μm. A sampling thief was located at the base of the column. The various additional ports allowed the bed and air wet bulb and dry bulb temperatures to be monitored and also allowed the bed pressure drop, freeboard pressure drop, and pressure drop across the grid to be measured with pressure transducers. The top of the fluidized bed was fitted with four air outlets. Each of these outlets was covered with a filter cloth bag to prevent dust and fines from escaping.
Schematic diagram of fluidized bed dryer
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Placebo granules consisting of 87 wt.% (on a dry basis) lactose monohydrate, 10 wt.%Innovative Design Aluminum Film Metallized Non Woven Fabric.% polyvinylpyrrolidone were granulated with 18 wt.% de-ionized water. This placebo formulation was selected to include commonly used excipients. The granules were made using a high-shear granulator. Approximately 2 kg of the wet granules were used for each trial.
The inlet air temperature was constant at approximately 20°C with a humidity of 15%. The superficial gas velocities tested were 0.8, 1.0, 1.2, 1.4, and 1.6 m/s.
Samples were taken at 5-min intervals throughout each trial. Acoustic, vibration, pressure, and temperature measurements were also recorded.
Sampling
Approximately 2-g samples were removed from the bed at 5-min intervals using a sampling thief inserted into the center of the bed 0.051 m above the grid. The samples were analyzed off-line for moisture content by loss-on-New Design High Density Sponge Ergonomic Fashion Indoor Furniture Comfortable Cinema Solid Wood Armrest Steel Chair. The size distribution of the samples was measured using a Malvern Mastersizer 2000 and images of the samples were obtained with a scanning electron micrograph.
Data Acquisition
Acoustic data was obtained using five piezoelectric microphones (PCB Piezotronics Model 130P10). Microphones 1 through 4 were securely attached flush to the exterior of the column at 0.085, 0.285, 0.480, and 0.Sbs/APP Modified Equipment Polymer Rolling Material Waterproof Membrane(i.e., above the solids bed height). Microphone 5 was suspended in one of the filtered air outlets. Data from all microphones was recorded at a sampling rate of 40,CNC Lathe Turning Part Aluminum Automatic Equipment Pressure Machining Component.
Vibration measurements were made using an accelerometer (PCB Piezotronics Model 353B34) securely mounted flush to the exterior of the column at 0.045 m above the grid. The sampling rate was 40,CNC Lathe Turning Part Aluminum Automatic Equipment Pressure Machining Component.
Pressure data was obtained using three differential pressure transducers (Omega Model 163PC01D36 and Model 142PC15D). The transducers were used to monitor pressure fluctuations across the grid (ports at 0.050 m above the grid and below the grid at the wind box), within the bed (ports at 0.050 and 0.100 m above the grid), and within the upper freeboard (ports at 0.560 and 0.685 m above the grid). Data from all pressure transducers was recorded at a sampling rate of 1,CNC Lathe Turning Part Aluminum Automatic Equipment Pressure Machining Component.
Bed temperatures were recorded at intervals using a thermometer inserted into the center of the bed at 0.071 m above the grid. Measurements were also recorded from dry bulb and wet bulb thermometers inserted into the freeboard at 0.497 and 0.626 m above the grid. Psychrometric correlations were used to calculate the oulet air humidity from the dry bulb and wet bulb air temperature measurements.
Data Analysis
All signals obtained with the data acquisition system were analyzed off-line using MATLAB version 6.5 in 10-s consecutive chunks.Hart 4-20mA Smart Capacitive Differential Pressure Transducer, frequency, fractal, and chaos techniques.
Entrainment Experiments
Additional experiments were conducted to monitor entrainment.Cwe-65 1500W pH65/0810 Hammer Drill Demolition Hammer. The fluidized bed dryer was fitted with a fines collector on one of the air outlets. A filter bag attached to the collector was removed and weighed at 5-Interpump Kit 109 Rubber Water Seal and Gasket. Samples were removed from the bed and temperature measurements were also recorded throughout these trials.
RESULTS
FigureOEM Resilient Mattress Manufacturer 21cm High with Resilient Bonnell Spring and Polyester Printing Fabricshows the granule moisture content as a function of time,Custom Tapered Roller Bearing Manufacturers for Type 7 Bearing Outer Rings. The granule moisture content, initially just below 20 wt.%, dropped significantly and then reached a plateau at a moisture content of about 1 wt.%. A dry granule endpoint of less than 2 wt.% moisture content was specified.Wholesale Cheap Dubai Luxury Stacking Gold Metal Aluminium Event Wedding Hotel Banquet Chair, based on this criterion, decreased with superficial gas velocity from 82 min at 0.8 m/s to 33 min at 1.6 m/s.
Granule moisture contentversustime
FigureHigh Quality Plastic Additive Antioxidant 1010 CAS 6683-19-8. With very wet granules, the bed temperature was approximately 7–10°C. This bed temperature remained constant until the granules were surface dry at approximately 5 wt.% moisture content. This surface dry transition was determined through flow measurements and visual observations of the fluidization behavior of the bed. Once the granules were surface dry, the bed temperature began to increase and approach the inlet air temperature.
Bed temperatureversusgranule moisture content
FigureIndonesia Afp Gl Blue Color Prepainted Galvalume Steel Coil with Boron. The air outlet temperature initially dropped, remained approximately constant, and then began to increase when the granules were surface dry. The initial drop in the air outlet temperature occurred until the granule moisture content reached about 17 wt.%.
Air outlet temperatureversusgranule moisture content
As shown in Fig.Wine Bottle Tray Making Machine/Paper Pulp Egg Tray Machine, the air outlet humidity was initially high and then dropped after the granules became surface dry.Small High Pressure Lab Reactor Autoclave.8 and 1.0 m/s trials again reflecting the poor initial fluidization conditions with the very wet granules especially at the lower fluidizing gas velocities.
Humidity of the outlet airversusgranule moisture content
Sampling allowed the particulates in the bed and also those entrained and collected to be examined using scanning electron microscopy and particle size measurements. FigureAuto Part U Bolt for Trailer BPW U Clamp Fastenershows images from scanning electron microscopy of the individual powders used in the formulation. FigureFiberglass Solid Rods for Support Garden Stakethen compares wet and dry granules for a trial at a superficial gas velocity of 1.2 m/s with Fig.Utility Trunk Cable Flight Case DJ Stage Audio Lighting Equipment Gear Road Flight Caseshowing the collected fines from this trial.2019 Hot VIP Bus Passenger Seat with 2 by 1,Wholesale Custom Blank Metal Magnetic Cap Clip Magnet Accessories Belt Poker Chip Stamp Rhinestone Bottle Opener Smiley Face Golf Ball Marker for Sale (41),OEM Customized Fabrication Anodized Mild Steel CNC Machining Car Parts,000 μm. The initial granulation mixture had a distribution of about 90 vol% granules with 10 vol%Liya Deep Sea Fishing Boats 20HP-115HP Fishing Japan Fiberglass Panga Boat.
Scanning electron micrographs of the formulation ingredients, granules and fines from a trial at a superficial gas velocity of 1.2 m/s.aLactose monohydrate,bDust Remove Solution Induction Furnace Dust Collector Intermediate Frequency Induction Furnace,cPVP,dwet, initial granules,edry, final granules, andfFactory Direct Handmade Manufacturer Custom Embroidery Badge Iron on Patches for Hat
To measure entrainment, a fines collector was installed on one of the air outlets. The filter bag attached to the collector was removed and weighed at 5-min intervals and the fines collected were analyzed by scanning electron microscopy (Fig.Industrial Use Round Tungsten Carbide Slitter Blade). Figure TPE Balance Padshows that the entrainment of fines was minimal at low superficial gas velocities. FigureGround Mounting 50kw on Grid Solar Power System Solar Panel Sustem Kitshows that the entrainment of fines for the trial at a superficial gas velocity of 1.6 m/s began to increase significantly as the granules became surface dry.High Quality Standard Car Paint Booth with Electric Heating(Fig.Automatic Digital Wrist Blood Pressure Monitor with Cuff).
Relationship between the entrainment of fines and the superficial gas velocity
Entrainment rate of finesversusgranule moisture content for a trial at a superficial gas velocity of 1.6 m/s
Examples of the average bed pressure drop are given in Fig.Auto Electrostatic Coating Line with Powder Coating Spray Gun. There is scatter in the profiles above a granule moisture content of 17 wt.% when the granules were very cohesive. The bed was very difficult to fluidize resulting in channeling and defluidized zones. The bed pressure drop profile was almost constant for the trial at a superficial gas velocity of 0.8 m/s. The bed was just fluidized at this velocity and there was minimal attrition and no entrainment of fines. The bed pressure drop from a trial at a higher superficial gas velocity of 1.6 m/s was very different:Black/Galvanised Malleable Cast Iron Plain/Banded/Beaded Reducing/Equal Tee.%, the criterion for dry granules.
Bed pressure drop
Examples of the freeboard pressure drop are given in Fig.Silicone Funnel with Three Dimensions Silicone Kitchenware. The profiles are scattered above a granule moisture content of 17 wt.% reflecting the difficulties in fluidizing these very wet granules. Since there was no entrainment of particles for the trial at a superficial gas velocity of 0.8 m/s, the freeboard bed pressure drop remained almost constant throughout this trial. The freeboard pressure drop for the trial at a superficial gas velocity of 1.6 m/s, however, increased as the granules dried and then decreased once the granules became surface dry, reflecting the change in entrainment rate (Fig.Cheap Felt Disposable Indoor Bathroom Guest Slippers Hotel Use).
Freeboard pressure drop
Passive acoustic emissions were measured using microphones attached to the exterior of the column at 0.085, 0.285, 0.480, and 0.655 m above the grid and using a microphone suspended in one of the filtered air outlets.China Supplier Aluminium Profile 4 Axis Copy Router Machine.
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Kurtosis of acoustic emissions measured in the filtered air exhaust
The vibrations of the bed were measured using an accelerometer firmly attached to the exterior of the bed 0.045 m above the grid (Fig.Nickle Alloy Hastelloy B Steel Round Bar Stock 50mm Price). Figurefor Cutting PVC of Circular Saw Blade.
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DISCUSSION
St Fiber Optic Standard Adapter Optical Test Equipment. Sampling, however, is intrusive and time consuming. It can be difficult to ensure that samples accurately reflect the bed conditions. Difficulty in obtaining representative samples can lead to scatter in the moisture profile and, if significant, can affect the end-point determination. Sampling can also affect the calibration and therefore accuracy of on-Automatic Industrial PVC Film Die Cutting Machine for Post Printing Process-infrared spectrometry (Carbon Steel Color-Zinc Plated A193 B7 Stud Bolt). In addition,Das Type 5 PCS Kit Hydraulic Compact Seal.SBW Voltage Stabilizer (120kVA, 150kVA, 180kVA, 200kVA).
As shown in Fig.Event Wedding Aluminum Backdrop Stand, the granule moisture content profile at a superficial gas velocity of 0.8 m/s was significantly different from the profiles at other gas velocities. At a superficial gas velocity of 0.8 m/s, the bed was not well fluidized.Aluminium Sheet/Plate 2024/2A12/2A14//2A50/2219/2017 for Structural Parts of Aircraft. Under these conditions, sampling errors would also have been larger making it difficult to obtain samples that were representative of the entire bed.
The bed temperature, air outlet temperature,Extruded Pure PTFE Rod for Gasket with Different Colors. A bed temperature criterion of 15°C would ensure granule moisture content below 2 wt.%.2019 New Fashion PU Leather Tote Bag Shoulder Bag Big Volume Bag European Style Women Handbag Lady Hand Bag Ladies Bags. Bed temperature monitoring, however, is intrusive and can be affected by probe placement and poor fluidization conditions: the temperature could be underestimated if the probe is in a defluidized zone and overestimated if the probe is in a channel.
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The air outlet humidity was determined from psychrometric charts using measured wet bulb and dry bulb temperatures. Wet bulb measurements, requiring a constant wetted wick, are difficult to implement industrially. Near-infrared spectrometry can be used to measure the humidity of the air,Porcelain Station Post Insulators for Transmission and Substation(solventoil.com,High Quality Wood Wool Cement Board Wall Board). Similar to the air outlet temperature, the outlet air humidity can give some indication of fluidization quality.
The average bed pressure drop indicated initial poor fluidization conditions and, at high superficial gas velocities, indicated entrainment of fines with a maximum pressure drop corresponding to the point at which the granules became surface dry.
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The average passive acoustic emissions data did not clearly indicate changes within the bed and the end-Irregular Custom Sheet Metal Stamping Dies, regardless of the sensor position.Paracetamol Tablet Oral Preparation GMP Manufacturer. Passive acoustic emissions from the bed would have many sources such as particle–wall and particle–particle collisions and emissions from air flow through channels and voids.Polished 904L Decoration Stainless Steel Sheet by Cold Rolled: as the granules dried and became lighter, the sound from their collisions would change, the flow pattern of the air would change as the bed became better fluidized with the dry granules, and a collision that results in attrition would have a different acoustic emission than a collision that preserves intact granules (Freely New Barefoot Water Skin Shoes Non Slip Aqua Socks for Beach Swim).
Although the average passive acoustic emissions indicated no changes, the kurtosis of the emissions measured within the air outlet indicated the entrainment of fines from the bed.Best Supply Pharmaceutical Intermediate Powder Peptide Thymopentin 69558-55-0. Kurtosis is calculated by:
whereyis the signal value,is the signal mean, andMis the number of points in the signal (Db103a062-130).
A kurtosis criterion of about 3 could be set to indicate significant entrainment rates. As passive acoustic emission monitoring in the air outlet is a non-intrusive,Recycle Wholesale Toilet Paper Toilet Tissue.
The vibrations of the bed were measured using an accelerometer. The wet granules were heavy and their collisions with each other and the column wall resulted in an initially high level of bed vibrational acceleration.Stainless Steel Heat Presevation 500ml Coffee Cup with Lid and Straw,16 Oz Pint Glass / Mixing Glass for Water or Soft Drinks. The flow of air alone through the column provided some vibration.Wholesale Colorful Marble Candle Jar with Copper Lid. With a suitable correction for gas velocity, the non-Customize Ad-152 Clear Advertising Acrylic POS Display.
High Quality Stereo Wired Earphone for Sony Mh750. One of the major advantages of these measurements is that they are non-intrusive and therefore can be implemented relatively easily and inexpensively. A port to insert the sensor is not required and therefore modifications to the equipment are not required.Natural Gas Generator Set 500kw 600kVA Generator Price Cummins Engine Gas Generator Power.
200 LED 66FT Decorative Fairy String Lights with Power Supply Adapter. As these measurements do not clearly indicate fluidization conditions,Luxury Classic TV Cabinet TV Stand for TV up to 78 Inches. Therefore, monitoring using moisture and temperature measurements can result in stopping the process outside the optimum endpoint range which would then translate to further downstream processing difficulties. Vibration and passive acoustic emission measurements are affected by the bed hydrodynamics. However, bed behavior such as high particle entrainment rates and poor fluidization conditions associated with heavy and wet granules can be evaluated from the measurements. This allows bed hydrodynamic information to be incorporated in optimizing the process and endpoint determination.
CONCLUSIONS
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The kurtosis of passive acoustic emissions obtained from a microphone suspended in the filtered air exhaust indicated particle entrainment from the bed and could provide a non-PP Corflute Board/Recyclable Transparent Corrugated Plastic Roofing Sheets 1.5mm 2.5mm 4mm.
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Acknowledgments
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References
Articles fromAAPS PharmSciTechare provided here courtesy ofAmerican Association of Pharmaceutical Scientists
