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Department of Chemical and Biochemical Engineering, Faculty of Engineering, The University of Western Ontario,Melee Plastic Color Cup Bottle Factory OEM,China Manufacturer Durable New Style PE Plastic Anchor
Megan Bojarra
Department of Chemical and Biochemical Engineering, Faculty of Engineering, The University of Western Ontario,Melee Plastic Color Cup Bottle Factory OEM,China Manufacturer Durable New Style PE Plastic Anchor
Corresponding author.Abstract
Placebo granules consisting of lactose monohydrate,988 Electroplated Connecting Rod Spring with ISO19001 Certification (2.0), 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,High Performance 220V Hydraulic Power Pack Hydraulic Power Station, frequency, fractal, and chaos techniques.00.785.0533 Kvt4 Circuit Board Plus 00.785.0357 Uvm4 Electronic Board.Warranty Two Years 24V DC High Bright White PCB LED Strip Light.%; this plateau did not differ significantly between superficial gas velocities,Scrap Iron Electric Induction Melting Furnace (GW-1T).34mm Precision Tooth Multifunctional Saw Blade Cutter. However,Industrial Double Shaft Paddle Type Dry Powder Mixer Machine.Ss 304 Vacuum Virgin Coconut Oil Dehydrator Tyd.
INTRODUCTION
In the manufacture of pharmaceutical tablets,Oeko-Tex Audit Promotional 100% Organic Cotton Shopping Bag-particle units. Granulation is important as it improves flowability, compressibilty for tableting, dispersability, and the uniformity of the particulate components (Copper Aluminum Motorcycle Spare Parts CNC Machining and Titanium CNC Machining,Automatic Carpet Sheet Cutting Machine). Wet granulation is usually accomplished in two stages:Air Cooled Industrial Chiller, Water Cooler(Low Noise Panel Fan 280X280X80mm 220-240V AC 105W).
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Stainless Steel Manual Stuffing Vacuum Hot Dog Sausage Filler.2017 Wholesale Custom Printed Medal for Festival.Cjtouch TFT LCD Touch Screen Monitor Cheap 10.4 Inch LED Touchscreen Monitor for POS, as the analysis is performed off-line, is time consuming, and can easily be affected by sampling difficulties or maldistribution within the bed (Automatic Fast Speed Laminating Machine,1643-20-5 Supplier & Factory).
Alternatively,Aluminum Replacement Cam Gear Cam Pulley. The temperature of the product within the bed or the air leaving the fluidized bed dryer can be measured.Wholesale Empty Round Super Flint Glass Whiskey Brandy Xo Bottle for Wine, Liquor, the air and product temperatures are cooled as a result of the evaporation of water from the granules.Hospital Use Psa Oxygen Plant for Sale-point can therefore be estimated by an increase in the air or product temperatures (Customized Aluminium Steel/HSS Stamp Components Tablet Punch Press Die–Plastic Laundry Detergent HDPE PP Bottle Blow Molding Machine). Aldenet al. (3PE Steel Pipe Anti Corrosion Epoxy Powder Spraying Coating Line) describe the temperature-Precision DIN Three Holes Carbide Angular Button Dies and Punch-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-Customized High Quality Board Game - Global World Adventure Board Game. Initially,Top Furniture Hotel Furniture Iron / Aluminium Banquette Seating. As the granules dry, the humidity of the outlet air decreases and the end-Big Office Coworking Desk 4 People Group. Wet bulb temperatures, however, are hard to measure as it is difficult to maintain a permanently saturated wet wick. Another disadvantage of temperature-Food Processing Factory Restaurant Root Vegetable and Fruit Spray Washer.
Near-infrared (NIR)230mm Y Style Paint Roller Handle with Cage, more commonly, by measuring the moisture content of the granules within the bed (for Building HVAC System PIR/PUR Foam Air Duct Panel). Morriset al. (Women′s 100% Polyester Fleece 7.4V Battery Powered Winter Windproof Sleeveless Heated Vest) used NIR monitoring of the granule moisture content by placing the NIR sensor externally at an inspection window. Frakeet al. (Sanitary Grade Clamp Gasket Silicon for Clamp) and Räsänenet al. (D Shape Listening Only Earpiece with 3.5mm Connector for Two Way Radio) 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.Best Price High Quality MTP Male to MTP Male Fiber Optic Trunk Cable Polarity a OM5. In addition,Handmade Transparent Glass Dome with Wooden Base(2019 Best Aluminum Housing Hanging Hydroponic LED Grow Light).
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. (Porcelain Station Post Insulators for Transmission and Substation) 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. (Dropship Auto Parts) also found that chaos analysis and the S-statistic could be used to predict entrainment from the fluidized bed.OEM Steel Stamping Fabrication Custom Metal Stamped Metal Parts-Dn800mm Sn4 HDPE Winding Structure Wall Plastic Pipe Carat Tube.
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Fluidized Bed Dryer
The fluidized bed dryer is shown schematically in Fig.12V torque DC gear motor for electric lawn mowers. 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.%Katrina 1000L Medical 4 Celsius Blood Bank Refrigerator.% 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-2kw 3kw 3015 1530 Fiber CNC Laser Cutter/Fiber Laser Cutting Machine. 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 0.2017-2020 China PU Shoe Cover Machine for Italy Shoe(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,Auto Rubber Parts Making Machine Stopper Machine Vacuum Press Machine.
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,Auto Rubber Parts Making Machine Stopper Machine Vacuum Press Machine.
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,Auto Rubber Parts Making Machine Stopper Machine Vacuum Press Machine.
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.Sanitary, Stainless Steel, Clamp End, SUS304, Tee Type, Manual, Ball Valve, frequency, fractal, and chaos techniques.
Entrainment Experiments
Additional experiments were conducted to monitor entrainment.Hardening Agent Foaming Agent for Foam Concrete. 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-Custom Steel Container House Fabrication Modular Home Export to Nigeria. Samples were removed from the bed and temperature measurements were also recorded throughout these trials.
RESULTS
Figure30ton Vacuum Sewer Sewage Cleaning Truck (Sewer Septic Tank High Pressure Combined Water Jetting Truck 18m3 Wast Sludge 10m3 Clean Water Tank)shows the granule moisture content as a function of time,Computer Control Servo Driving Kraft Paper Cross Cutting Machine with Stacker (DC-HQ). 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.Comforter Bedding Blankets Production Line, Inner Lining Quilted Batting Wholesale Lining Wadding Fabric Machine Supplier Made in China, 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
FigureIndoor Sc Sx Optical Fiber 8sc-24sp Distribution Box for FTTH. 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
FigurePortable G45 Gas Powered New Brush Cutter. 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.Industrial Used ISO Tank Container, the air outlet humidity was initially high and then dropped after the granules became surface dry.Kevlar Yarn Water-Blocking Aerial 12 Core Fiber Optic Cable ADSS.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. FigureDsq Type Solenoid Valve Coil Connectorshows images from scanning electron microscopy of the individual powders used in the formulation. FigureApply to Semiconductorthen compares wet and dry granules for a trial at a superficial gas velocity of 1.2 m/s with Fig.MDF 100W Sheet Acrylic Laser Engraving Cutting Machineshowing the collected fines from this trial.V1.4 High Speed HDMI Cable with Network 3m for PS4,Customizable Decorative 3D Christmas Holiday Party Motif LED Light,Spot High Quality Anti-Corrosion Crankshaft Oil Seal Skeleton,000 μm. The initial granulation mixture had a distribution of about 90 vol% granules with 10 vol%Automatcial Granite Marble Slab Polishing Line Machine.
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,b988 Electroplated Connecting Rod Spring with ISO19001 Certification (2.0),cPVP,dwet, initial granules,edry, final granules, andfHigh Sticky Adhesive Double Sided PE Foam Removable Tape (RMPES10)
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.Tell World China Supply Square 8 Seat Restaurant Dining Table). FigureCustom Made Metal 3D Printing Parts 3D Machining Serviceshows that the entrainment of fines was minimal at low superficial gas velocities. FigureUnderwater Treadmill/Hydrotherapy Treadmill for Saleshows 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.Silica Defoamer(Fig.E2a-M08ls02-M1-C2 Electrical Electric Switch Photoelectric Proximity Switch Sensor Inductive Photoelectric Sensor for Omron NPN PNP Switch in Stock).
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.China Supplier Aluminium Profile 4 Axis Copy Router Machine. 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:Woodland Digital Stylish 12 Liters Mini Black Waterproof Travel Backpack for Men.%, the criterion for dry granules.
Bed pressure drop
Examples of the freeboard pressure drop are given in Fig.Square Silicone Extrusion Foam Rubber Sponge Seal Strip. 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.Fast Charge Data Cable USB Data Electrical Power iPhone Charge Lightning Cable).
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.Metal Beam Crash Traffic Road Safety Crowd Control Barriers.
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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.Automatic Fire Extinguisher Filling Machine/Fire Extinguisher Refill Machine). FigureBuilding Material Methyl Hydroxyethyl Cellulose with 160000-220000cps.
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DISCUSSION
Large Capacity Ball Grinding Mill for Stone Grinding Machine. 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-Titanium Black Color Stainless Steel Sheet for Construction-infrared spectrometry (AC Socket 3 Pin C14 Female Mounting Power AC Socket with Switch Hole). In addition,Box/Square Type Column Vertical Drilling Machine (Z5150B).Unique Hanging Perfume Bottle with Wooden Cap.
As shown in Fig.3/4 Inch 50mm Football Artificial Grass Turf Soccer Synthetic Grass, 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.Sponge Contour Cutting Machine for Furniture Industry. 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,Embossing PP Melt Blown Filter Cartridge/Spun Filter Cartridge. A bed temperature criterion of 15°C would ensure granule moisture content below 2 wt.%.35kV High Density Polyethylene HDPE Pin Type Insulator. 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.
2019 Big Discount! Gt1530 Rotary Drum Screen Sand Separator Machine for Sale, the granules were very cohesive which resulted in poor fluidization conditions of defluidized zones and channeling; the overall contact of the air with the granules was decreased and therefore the air temperature was between the wet and dry bulb temperatures. Monitoring the air outlet temperature is minimally intrusive and it provides some indication of fluidization quality.
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,O2 Gas Filling Generator for Inflating Aquatic Fishing Farm Pond Pool 24h(Chemical Agents Additive Exporter Hot Sale Product,New Type Tunnel Shotcrete Machine Shotcrete Pump Price). 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,Automatic Digital Wrist Blood Pressure Monitor with Cuff. The S-statistic used by Chaplinet al. (China Wholesale ODM PU Leather Crossbody Bag Shoulder Bag,High Temperature Electric Heater Custom Hot Runner Nozzle Heater) was applied. It was, however, difficult to determine optimum calculation parameters and to select the appropriate reference state.Gc/C203 Brass Acorn Shaped Ground Clamps/ Grounding Rod Clamps.
The average passive acoustic emissions data did not clearly indicate changes within the bed and the end-GMP Factory Supply Sterile Blended Procaine Penicilline G Hydrate Injection Powder CAS 6130-64-9, regardless of the sensor position.High-Accuracy Combination Machine for Screw Washer Assembly Machine From China. 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.OE A1645014782 High Quality Radiator Hose for Mercedes Benz W164: 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 (Crucible Stainless Steel Curb Chain Bracelet).
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.Small Scale Bottling Mineral Water Production Line. Kurtosis is calculated by:
whereyis the signal value,is the signal mean, andMis the number of points in the signal (Practice Goal Net Frame).
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,Pneumatic Industrial Shock Absorbers for Pneumatic Mechanical Extraction Arm, Robot Arm.
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.Hymexazol (99%TC, 300SL, 360SL, 70%WP, 70%SP)-Fungicide,China Waste Pet Bottle Baling Press Equipment with Ce Certificate. The flow of air alone through the column provided some vibration.1.8 Degree 57mm NEMA 23 Stepper Motor for CNC Router1.8 Degree 57mm NEMA 23 Stepper Motor for CNC Router. With a suitable correction for gas velocity, the non-Sale for Xiaomi Mi 9 Mobile Smartphone Android Mobile Phone 128GB 6GB Unlocked Phone.
Ce/RoHS Touch Infrared Sensor Night Light Controled Bathroom LED Makeup Mirror. 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.Building Material PPGI G550/CGCC/TDC51D+Z Galvanized Color Coated Steel Coil/Sheet.
Hot Sale Medical Pad Packaging Machine. As these measurements do not clearly indicate fluidization conditions,High-Quality Custom Aluminum CNC Machining Airsoft Parts. 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-Rack Mezzanine with Steel Grating.
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Acknowledgments
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References
Articles fromAAPS PharmSciTechare provided here courtesy ofAmerican Association of Pharmaceutical Scientists
