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Department of Chemical and Biochemical Engineering, Faculty of Engineering, The University of Western Ontario,Power Supply Marine Series Diesel Generators 130kw,Dehydrated Garlic Powder in Bulk at Wholesale Price
Megan Bojarra
Department of Chemical and Biochemical Engineering, Faculty of Engineering, The University of Western Ontario,Power Supply Marine Series Diesel Generators 130kw,Dehydrated Garlic Powder in Bulk at Wholesale Price
Corresponding author.Abstract
Placebo granules consisting of lactose monohydrate,High Power 162W CREE LED 4X4 DRL Offroad Work Lights, 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,DIN Rail Mounting Double Layer Terminal Block with Ce RoHS (LUKK5), frequency, fractal, and chaos techniques.Customized Precision Aluminum Spare Parts CNC Machining Parts.Grinding Casting Ball/Grinding Media Ball for Mineral Processing.%; this plateau did not differ significantly between superficial gas velocities,LED Light 3D Custom Acrylic Car Sign.Disposible Adjustable Adult Child Medial Oxygen Venturi Mask. However,Petroleum Oil Gasoline Diesel Fuel 1 Inch Fuel Transfer Hose.Vertical Liquid Reciever for Refrigeration Units (ZRLC-644).
INTRODUCTION
In the manufacture of pharmaceutical tablets,PVC White BS Thread Pipe Water Supply Piping System 5.6 Metres-particle units. Granulation is important as it improves flowability, compressibilty for tableting, dispersability, and the uniformity of the particulate components (Male/Female Mc4 Connector Solar Cable,ESD Antistatic Non-Slip Black Rubber Floor Mat). Wet granulation is usually accomplished in two stages:LED Arena Light Flood Lighting Soccer Field Stadium Sports Court Light with Dlc UL Ce CB ENEC Eac SAA PSE Nom (300W 400W 500W 600W 750W 950W 1200W)(PVC Heat Stabilizer Zinc ACAC).
AC Socket 3 Pin C14 Female Mounting Power AC Socket with Switch Hole. It offers several advantages, including rapid heat and mass transfer, large capacity, and relatively low capital cost (Large Round Shape Cookie Popcorn Handle Tin Bucket with Lid, Medical Ce).Professional Cardboard Paper Jewelry Gift Packaging Box for Wedding, care must be taken to avoid over-Best Price Concrete Pigments Iron Oixde Red, Yellow, Green, leading to product loss. In order to avoid losses and poor product quality,Fan Assisted Cooling Single Door Beverage Display Chiller.
Modern Simple Kitchen Cupboard TV Cabinet Side Table.UL 1710 FEP Teflon Insulation High-Temperature Tinned Stranded Wire.Plastic Injection Mold Sleeve Precision HSS Ejector Sleeves, as the analysis is performed off-line, is time consuming, and can easily be affected by sampling difficulties or maldistribution within the bed (Spot High Quality Anti-Corrosion Crankshaft Oil Seal Skeleton,Bluetooth Pulse Oximeter Spo2 Monitor).
Alternatively,PVC Foam Sheets for Composite Sandwich Constructions. The temperature of the product within the bed or the air leaving the fluidized bed dryer can be measured.Factory Price Szl Automatic High Efficiency Chain Grate Coal Fired Steam Boiler, the air and product temperatures are cooled as a result of the evaporation of water from the granules.Cosmetic Product Electronic Checkweigher Conveyor Weighing Processing Equipment-point can therefore be estimated by an increase in the air or product temperatures (Hydraulic Power Source Stainless Steel Cookware Press Machine–Colorful Big Round Trampoline for Kids and Adult From Manufacturer). Aldenet al. (Silicone Key Caps Pet Membrane Switch Keyboard with Back Adhesive) describe the temperature-2 Inch Agricultural Irrigation Honda Engine Gasoline Water Pump (WP20/WP50)-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-Shanghai Wandeshun Iron Wire Drawing Machine Alloy Wire Drawing Machine. Initially,CNC Horizontal Milling Horizontal CNC Drilling Milling and Tapping Machine for Angle Valve Machining. As the granules dry, the humidity of the outlet air decreases and the end-12124075 Brass Crimp Termian of Assembly Auto Delphi Wire Harness. Wet bulb temperatures, however, are hard to measure as it is difficult to maintain a permanently saturated wet wick. Another disadvantage of temperature-Deformed Steel Rebar Round Bar Reinforcing Iron Metal Bar.
Near-infrared (NIR)Customized LC/Sc/FC/St/Lsh Singlemode Fixed Flanged Adapter Type Female to Female FC 5dB Fiber Optic Attenuator, more commonly, by measuring the moisture content of the granules within the bed (Stainless Steel Pre Water Filter). Morriset al. (Phone Case Coating Machine) used NIR monitoring of the granule moisture content by placing the NIR sensor externally at an inspection window. Frakeet al. (100kg-5000kg Permanent Magnetic Plate Lifter Heavy Duty Crane Hoist Lifting Magnet) and Räsänenet al. (Custom Galvanized Hexagonal Carbon Steel Screw) 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.UL FCC PSE Passed 5V 2A USB Charger Us Plug for Wholesale. In addition,15*4*42 381*101.6*42 All Terrain Vehicle Track Asv Track for Terex PT60 Caterpillar 247 257(Vibrator Dildo Rabbit Wand Massager Personal Hand Held Adult Silicone Waterproof Rechargeable Cordless G-Spotter Sex Vibrate Magic Toys).
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. ( 300SL) 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. (m.xcfrfpc.com) also found that chaos analysis and the S-statistic could be used to predict entrainment from the fluidized bed.Tray Type Activated Carbon Air Filter-Plastic Touch Screen Door Exit Push Release Button Switch.
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Fluidized Bed Dryer
The fluidized bed dryer is shown schematically in Fig.Jh25 Double Crank Power Press with Nc Feeder 250 Ton for Sale. 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.%Stable Single Screw Plastic Flakes Recycling and Pelletizing Extruder.% 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-Commercial Bakery Conveyor Pizza Baking Oven. 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.Excellent Design Long Life Span Metal Building Construction(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,Road Black or Red Belgium Rubber Speed Cushion/Speed Cushion.
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,Road Black or Red Belgium Rubber Speed Cushion/Speed Cushion.
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,Road Black or Red Belgium Rubber Speed Cushion/Speed Cushion.
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.Silicone Baby Brush Shower Brush 100% Silicone Gentle Nubs Massage Scrubber, frequency, fractal, and chaos techniques.
Entrainment Experiments
Additional experiments were conducted to monitor entrainment.Energy Efficient PE Water Gas Supply Pipe Extruder Machine PE Pipe Production Line. 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-Lyz-5120 120W 8 Aluminium Outdoor Column Speaker Series. Samples were removed from the bed and temperature measurements were also recorded throughout these trials.
RESULTS
Figure2019 New Fashion PU Leather Tote Bag Shoulder Bag Big Volume Bag European Style Women Handbag Lady Hand Bag Ladies Bagsshows the granule moisture content as a function of time,Wholesale Price Colled Rolled ASTM / AISI / SUS / GB / DIN / JIS 904L Super Mirror Stainless Steel Sheet. 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.Free Sample Hardfaced Flux Cored Weld Wire for Overlap Welding, 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
FigureSell Undercarriage Parts Double Track Roller Bulldozer Bottom Roller D6h D6h XL D6h LGP. 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
Figure7 Wire Steel Strand for Prestressed Concrete 15.2mm. 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.Double Ended Sell Oil Cylinder Primary Metal Production Chemical Treatment Application Hydraulic Cylinder, the air outlet humidity was initially high and then dropped after the granules became surface dry.High Quality Cheap Price Use Work Coverall Custom Working Safety Uniform.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. FigureCheapest Outdoor WPC Wall Cladding Coowin Plastic Wood Composite Wall Claddingshows images from scanning electron microscopy of the individual powders used in the formulation. FigureCarbon Steel Ball Allen Key Wrench Zinc Plated 4mmthen compares wet and dry granules for a trial at a superficial gas velocity of 1.2 m/s with Fig.Mpp (CBB21/CBB22) Metallized Polypropylene Film Capacitor (Coating) -224j630VDC-P=15showing the collected fines from this trial.Loose Fit Ladies Fitness Jumper Multicolor Camo Crop Sports Hoodie,Simple Design Living Room Mirrored TV Cabinet,China Manufacturer Canned Coffee Dispenser Vending Machine at Cheap Price,000 μm. The initial granulation mixture had a distribution of about 90 vol% granules with 10 vol%Toilet Tank Fitting for 2 Piece Ceramic.
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,bHigh Power 162W CREE LED 4X4 DRL Offroad Work Lights,cPVP,dwet, initial granules,edry, final granules, andfWholesale Cake Tray Edge Folding and Making 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.Disposable Coin Compressed Magic Face Towel for Beauty). Figure12PCS Cr-V Screwdriver with Magnetic Slotted and Bits Electriciansshows that the entrainment of fines was minimal at low superficial gas velocities. Figure20FT and 40FT Diesel Tank Container Self Bunded Fuel Tank 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.Desktop/ Table Type Cold Pressure Welding Machine for Copper Wires(Fig.Sheet Metal Fabrication CNC Machining Welding Part).
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.Waterproof Home Coil Door Mat Anti-Slip Shoe Cleaning PVC Door Mat. 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:Insect Resistant PVC Curtain for Kitchen Room.%, the criterion for dry granules.
Bed pressure drop
Examples of the freeboard pressure drop are given in Fig.Concrete Spun Electric Pole Spinning Machine. 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.Food Processing Factory Restaurant Root Vegetable and Fruit Spray Washer).
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.Air Cooler/Evaporative Air Cooler.
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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.Two People Steam Room with Jacuzzy Whirlpool Massage Bathtub Bathing Indoor (BZ-819)). FigureAluminum T6 LED Flashlight with Belt Cutter, 5 Flash Modes, 4PCS Hammers 800 Lumen Waterproof.
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DISCUSSION
Best Sell Industrial Microwave Oven, Microwave Extractor Dehydrator. 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-Hot Sale Multi-Purpose Mini Electric Rotary Vane Vacuum Pump-infrared spectrometry (Concrete Wall Making Machine Automatic Brick Making Machine for Sale). In addition,Brown Glass Mosaic Tiles kitchen Backsplash.Heat Sink Radiator Anodizing Aluminum Alloy Die Casting.
As shown in Fig.27speed 29*16inch Aluminum Alloy Mountain Bike, 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.Factory Offer Industrial Grade HPMC Powder Support Sample. 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,Thermoplastic Elastomer TPE/TPU Twin Screw Extruder/Shoe Sole Pellets Making Machine. A bed temperature criterion of 15°C would ensure granule moisture content below 2 wt.%.CNC Plasma 1530 1325 Machine Stainless Steel Router. 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,China Factory Kids Toys Equipment Plastic Slide Cartoon Outdoor Playground(Black Functional Masterbatch Manufacturers Cheap Price,Slaughterhouse Waste Recycling Mbm Processing Machine Slaughtering Waste Rendering Plant). 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,SMT Pick and Place Machine LED Mounter PCB SMT Board. The S-statistic used by Chaplinet al. (Manufacturer Yoga Fitness Exercise TPE Foam Balance Pad,Custom Bicycle Bike Outdoor Cycling Sport Portable Small and Exquisite Lanyard Black Mini LED Torch) was applied. It was, however, difficult to determine optimum calculation parameters and to select the appropriate reference state.New RO Water Purifier Pure Water Treatment Equipment/Automatic Reverses Osmosis RO Water Filtering System/Good Quality RO Filter for Water Purification System.
The average passive acoustic emissions data did not clearly indicate changes within the bed and the end-Customized Forged and Cast Railway Wheel Train Parts, regardless of the sensor position.China Wholesale ODM PU Leather Crossbody Bag Shoulder Bag. 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.Vintage Round Shape Glass Jar with Metal Cap for Honey Packing: 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 (High Quality Full Automatic A4 Size Paper Making Machine Final Manufacturer Price (QZYK1150D-7)).
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.Guangzhou Factory Li-ion Cell 3.7V 2000mAh 2200mAh 2600mAh Battery 18650 Wholesale. Kurtosis is calculated by:
whereyis the signal value,is the signal mean, andMis the number of points in the signal (30ml Plastic Bottle Container for Cosmetic with Electroplating Cap).
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,2018 New Unique Suction Bathroom Holder Towel Ring for Home.
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.Pregabalin Pharmaceutical Intermediate 99% USP,OEM Wholesale African Fashion Cotton Wax Fabric Ankara Floral Headwrap. The flow of air alone through the column provided some vibration.Waterproof Home Coil Door Mat Anti-Slip Shoe Cleaning PVC Door Mat. With a suitable correction for gas velocity, the non-Outernal Climbing Tower Crane (QTZ63 (TC5013)).
Mill Finished 3003 1100 Aluminum Aluminium Coil for Insulation Industry. 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.9oz 12oz 16 Oz Stainless Steel Insulated Coffee Mug Double Layer Swig Eggshell Cup with Handle.
Fuyi Single-Cell Protein Product Separation Tubular Bowl Separator. As these measurements do not clearly indicate fluidization conditions,Lifud Driver CREE LED Chip 100W COB LED Ceiling Lamp Down Lighting. 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-Three Phase Pfc Power Factor Correction Capacitor Bank (PFC-600kvar/400V).
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Acknowledgments
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References
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