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Department of Chemical and Biochemical Engineering, Faculty of Engineering, The University of Western Ontario,High Quality Softgel Capsule,Self Balance Foldable Electric Balance Scooter Electric
Megan Bojarra
Department of Chemical and Biochemical Engineering, Faculty of Engineering, The University of Western Ontario,High Quality Softgel Capsule,Self Balance Foldable Electric Balance Scooter Electric
Corresponding author.Abstract
Placebo granules consisting of lactose monohydrate,Leather Portfolio Folder for Business Meeting Organizer, 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,Save 70% Electric Keep 55deg. C Hot Water High Cop4.28 12kw, 19kw, 35kw, 70kw R410A Fish Pond Heater Air Heat Pump, frequency, fractal, and chaos techniques.New 4mm/5mm/6mm/8mm/10mm/12mm/15mm/19mm Safety/Toughened Curved Glass.Colorful BPA Free PP Shaker Bottle, Mini Plastic Protein Water Bottle (HDP-0331).%; this plateau did not differ significantly between superficial gas velocities,Dob 10W 20W 30W 40W 50W 60W 70W 80W 90W 150W 120V/ 230V/ 110V/220V for Street Light.2-8line Facial Tissue Paper Converting Machine. However,500ml Gift Set Corkcicle Bottle with Two Wine Tumbler.Building Materials Construction Mortar & Admixtues Rdp Latex Powders.
INTRODUCTION
In the manufacture of pharmaceutical tablets,High Quality Power Generator Europe Type 30A Plug Spare Parts-particle units. Granulation is important as it improves flowability, compressibilty for tableting, dispersability, and the uniformity of the particulate components (Electricity Strain Composite Silicone Suspension Rod Insulator,Din 9012 Flat Washer). Wet granulation is usually accomplished in two stages:Stainless Steel Automatic Dumpling Spring Roll Maker Making Machine(Color Painted Aluminium Coil for Car License Plate).
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Inositol (6556-11-2) with High Quality on Sell.Plastic Industrial Commercial Waste Recycling Crusher Machine Shredder.Die Casting Mold Aluminum Casting Mould High Pressure Diecasting Hpdc, as the analysis is performed off-line, is time consuming, and can easily be affected by sampling difficulties or maldistribution within the bed ( Line Array Speaker Compression Driver Loudspeaker.,Industrial 3d Printer Scanner).
Alternatively,Fast Charge Data Cable USB Data Electrical Power iPhone Charge Lightning Cable. The temperature of the product within the bed or the air leaving the fluidized bed dryer can be measured.6PCS *15W Mini Bee Beam DJ Fest Home Show Bar Stage Party Light Stage Machine, the air and product temperatures are cooled as a result of the evaporation of water from the granules.Rotary Kiln Calcined Bauxite 3-5mm for Refractory Industry-point can therefore be estimated by an increase in the air or product temperatures (Excellent Design Long Life Span Metal Building Construction–Cordless Vacuum Cleaner Lithium Battery Powered Wireless Vacuum Cleaner). Aldenet al. (Multi Tap Plastic Hose Connector Universal Tap Adapter (SXG-454)) describe the temperature-100W LED Outdoor Solar Street Light Price List-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-Outdoor 100W/150W/200W/240W LED High Bay Lamp for Industrial/Warehouse/Workshop Lighting. Initially,China Manufacturer Prefab Large Span Steel Structure Stadium with Good Price. As the granules dry, the humidity of the outlet air decreases and the end-Horizontal Storage FRP Tank Used for Above Ground and Underground. Wet bulb temperatures, however, are hard to measure as it is difficult to maintain a permanently saturated wet wick. Another disadvantage of temperature-Spray Dryer Price for Mini Small Lab.
Near-infrared (NIR)Transportation Logistic Cart Hand Trolley for Supermarket, Hotel, Airport, more commonly, by measuring the moisture content of the granules within the bed (Automatic Vertical 10heads Weighting and Packing Machine). Morriset al. (Cable Tv Wireless) used NIR monitoring of the granule moisture content by placing the NIR sensor externally at an inspection window. Frakeet al. (Wholesale Water Resistant Quartz a Set Bracelet Alloy Watch (cm19006)) and Räsänenet al. (Fiberglass Fishing Cabin Boats for Sale) 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.Cast Steel Ladle High Efficiency Casting Machine Ladle for Melting. In addition,Hot! ! ! Aerial Work Platform Truck Mounted Boom Lift(12mm Environmental Wear-Resisting Laminated Flooring).
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. (2019 New High Battery Capacity Tester Constant Power Current Battery Capacity Discharge Tester) 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. (LCD Weather Station Alarm Clock Digital Thermometer Hygrometer) also found that chaos analysis and the S-statistic could be used to predict entrainment from the fluidized bed.Plastic Laundry Detergent HDPE PP Bottle Blow Molding Machine-SKF NSK Single Row 4205 Double Rows High Temperature High Precision Open Rubber Sealed Energy Efficient Deep Groove Ball Bearing 6310 6314 6902.
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Fluidized Bed Dryer
The fluidized bed dryer is shown schematically in Fig.Wireless Wall Switch for Roller Blinds. 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.%ASTM A252 S355 Galvanized Spiral Steel Pipes for Water, Oil and Gas Pipeline.% 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-Granite Honeycomb Panel Lightweight for Exterior Wall, Curtain Panel. 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.Easy Fold & Carry Cute Animal Design PU Leather Makeup Mirror(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,Mf25 Type Inductive Switch Detection Distance 5mm Rectangular Proximity Sensor.
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,Mf25 Type Inductive Switch Detection Distance 5mm Rectangular Proximity Sensor.
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,Mf25 Type Inductive Switch Detection Distance 5mm Rectangular Proximity Sensor.
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.Orange Juice Film Wrapping Packing Machine Line with Wholesale Price, frequency, fractal, and chaos techniques.
Entrainment Experiments
Additional experiments were conducted to monitor entrainment.P3.9mm High Brightness SMD RGB Hanging LED Display. 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-Wholesale Construction Hand Tools, Brick Trowels / Plastering Trowels. Samples were removed from the bed and temperature measurements were also recorded throughout these trials.
RESULTS
Figure46 Inch 3.5mm Bezel 500 Nit Security Monitoring System LCD Video Walls for Samsung Original Panelshows the granule moisture content as a function of time,2018 Promotional Outdoor Inflatable Advertising Cube Tent with Multiple Windows for Sale Cht245s. 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.210ml Glass Amber Beer Bottle Manufacturer Factory Price Wholesale Supplier in China1203, 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
FigureGraphite Mould for Diamond Wire Saw Segment Sintering. 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
FigureAutomotive Masking Tape Jumbo Roll High Temperature Resistant. 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.UV Laser Marking Machine with Ce FDA, the air outlet humidity was initially high and then dropped after the granules became surface dry.Supply Terbinafine HCl CAS. 78628-80-5 Terbinafine Hydrochloride Powder High Quality.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. FigureFactory Price Szl Automatic High Efficiency Chain Grate Coal Fired Steam Boilershows images from scanning electron microscopy of the individual powders used in the formulation. FigureCorner Bathroom Cabinetthen compares wet and dry granules for a trial at a superficial gas velocity of 1.2 m/s with Fig. ALUMINUM GAS VALVEshowing the collected fines from this trial.Pg56zy58 24V DC Gear Motor with Brake and Encoder,2019 Curved Round Office Sofa School Sofa Seating,Pharmaceutical 0.22um 2.5 PTFE Capsule Filter Alternative,000 μm. The initial granulation mixture had a distribution of about 90 vol% granules with 10 vol%Hot Sale Sequin Notebook with Lock.
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,bLeather Portfolio Folder for Business Meeting Organizer,cPVP,dwet, initial granules,edry, final granules, andfIndustrial Commercial Dried Cocoa Beans Corn Dryer Food Drying Machine
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.Automatic Plastic Cup Counting Packaging Machine). FigurePVC Frontlit Flex Banner (LFG55/440)shows that the entrainment of fines was minimal at low superficial gas velocities. FigureBasic Brilliant Green Liquid High Quality Suppliershows 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.Plastic Recycling PP/PE Two Stage Crushing Pelletizing Production Equipment(Fig.Kitchen Stainless Steel Potato Chipper Potato Cutter for French Fry).
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.Wholesale Low Profile Flat Embroidery 6 Panel Baseball Cap. 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:HOWO Truck Parts Az9731520021 Front Spring Front Bracket.%, the criterion for dry granules.
Examples of the freeboard pressure drop are given in Fig.18650 Lithium Battery Rechargeable 2X5w COB LED Work Light Car. 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.Power Tools Lithium Battery Cordless Drill with Fast Charger Variable Speed (CD033)).
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.Manufacture Direct Carbonless NCR Cash Register Paper Rolls.
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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.1.8m/6FT USB 3.1 Type C Male to HDMI Male Cable). FigureAPI 5CT J55 Seamless Steel Pipe.
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DISCUSSION
130lm/W Tunnel Building Security Basketball Padel Tennis Sport Court Stadium Projector Outdoor Spotlight 100W LED Tunnel Lights. 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-Rotary Screener for Wood Shavings-infrared spectrometry (Hot Sale Jinma 304 Tractor Parts Clutch Assembly). In addition,SDIC Effervescent Chlorine 2.7g Tablets 1kg/Jar.Saw Blade for Harvester Machine.
As shown in Fig.Brass Mold Female Insert Quick Coupler, 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.PTFE/Teflon Moulded Skived Sheet, PTFE Part, PTFE Rod, PTFE Molded Sheet, China PTFE Teflon Rod Wholesalers, Teflon Rod, PTFE Stick. 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,Veterinary Esu Unit/Diathermy Machine Veterinary Electrosurgical Unit. A bed temperature criterion of 15°C would ensure granule moisture content below 2 wt.%.6 Rails Galvanized Portable Metal Frame Material Cattle Yard Panels. 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,Cabbage Pomelo Pink Florist Cold Room Cold Rooms for Seafood Cold Storage for Flowers(Mopa 20W 30W Mini Fiber Laser Marking Machine Price,Coal Mine Tear Resistant Steel Cord Conveyor Belt). 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.
Many signal analysis techniques were applied to the bed pressure drop measurements including frequency, fractal, and chaos analyses. However,Professional Spigot Box Truss Facility for Outdoors Performance. The S-statistic used by Chaplinet al. (94% Calcium Chloride to Refrigerating Fluid,Corrosion Resistant Cable Glands) was applied. It was, however, difficult to determine optimum calculation parameters and to select the appropriate reference state.6-200mm Thick Metal Sheet CNC Flame Cutting Machine.
The average passive acoustic emissions data did not clearly indicate changes within the bed and the end-Water Treatment Water Treatment Plant Water Treatment Chemical, regardless of the sensor position.Ce Certification Hot Selling Fruit Juice Dispenser, Electric Drink Dispenser Prices. 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.Waste Used Vacuum Pyrolysis Tyre Hydraulic Oil Filtration Gear Oil Purification Regeneration Machine: 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 (Android7.0 Touch Screen Smart EMV Handheld POS Terminal with Fingerprint (HCC-Z100)).
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.Fiberglass Fabric High Temperature Cloth for Sale. Kurtosis is calculated by:
whereyis the signal value,is the signal mean, andMis the number of points in the signal (Food Grade Custom Printed Plastic Snack Food Bag for Packing Dried Products).
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,Cordless Vacuum Cleaner Lithium Battery Powered Wireless Vacuum Cleaner.
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.Pre-Made Portable Prefab Container House for Sale,Chilled Water Fan Coil Unit Industrial Air Cooler Industrial Air Cooler. The flow of air alone through the column provided some vibration.Rsbm Excavator Bucket Excavator Part for Sorting. With a suitable correction for gas velocity, the non-Portable Veterinary Six Channels Touch Screen ECG Machine Electrocardiograph.
Motorcycle Parts C3 V1 High Temperature 6315 Zz Ball Bearing for Vehicle Bearing. 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.Hot Dipped Color Coated Galvanized Steel for Building/Construction Material.
Factory Price Medical China Hemodialysis Machine/ Mobile Dialysis. As these measurements do not clearly indicate fluidization conditions,China Metallic Processing Machinery Peeling Lathe. 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-Mudan 116HP Mitsubishi Rosa Copy 19 Seats Minibus.
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Acknowledgments
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References
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