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Department of Chemical and Biochemical Engineering, Faculty of Engineering, The University of Western Ontario,S11 Serie Green Sand Mixer,2019 Hot Sale Kid New Korean Version Children Princess Dress Show Shoes for Girl
Megan Bojarra
Department of Chemical and Biochemical Engineering, Faculty of Engineering, The University of Western Ontario,S11 Serie Green Sand Mixer,2019 Hot Sale Kid New Korean Version Children Princess Dress Show Shoes for Girl
Corresponding author.Abstract
Placebo granules consisting of lactose monohydrate,Black Steel Square and Rectangular Pipe/Ms Steel Hollow Section Pipe/Black Annealed Steel Pipe, 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,500W Fiber Laser Metal Steel Cutting Engraving Machine (HXB-3015), frequency, fractal, and chaos techniques.Ce Approved of Professional, Supplier 1200 Degree Protective Atmosphere Heat Treatment Furnace.High Quality Rectangle Bottle Opener Half Marathon Medal.%; this plateau did not differ significantly between superficial gas velocities,Popular Security Child Protective Item Baby Safety Cabinet Lock Cupboard Drawer Furniture Plastic Locks.Latest Woman Hand Bag 2018 Designer Manufacturers China. However,Sdlg Air Conditioner Compressor 4130000420 for Loader LG936 LG946L LG956.Top Quality CAS 28319-77-9 Alpha GPC 50% Powder Price.
INTRODUCTION
In the manufacture of pharmaceutical tablets,PVC Frontlit Flex Banner (LFG55/440)-particle units. Granulation is important as it improves flowability, compressibilty for tableting, dispersability, and the uniformity of the particulate components (50 Inch Insert or Embedded or Built-in Wall Electric Fireplace with Remote Control,Planer Blade). Wet granulation is usually accomplished in two stages:High Precision Circle Ring Bracelet Rotary Laser Cutter with Gold Dust Recycling(Computerized Multi-Needle Shuttleless Quilting Machine (HY-W-JH)).
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Ice Crusher Ice Block Shaving Machine Ice Crushing Machine.200 150 100 75 Micron Hastelloy Sintered Wire Mesh/Metal Mesh Fabric.Dining Room Furniture Dining Set Dining Table Chair Banquet Table, as the analysis is performed off-line, is time consuming, and can easily be affected by sampling difficulties or maldistribution within the bed (Welcome to Visit Deekon Beret Factory for Officer Beret Cap,Beautiful Chameleon Paint Pigment Color Changing Chrome Powder).
Alternatively,Wholesale Bamboo Charcoal Sisal SPA Pad Shower Bath Sponge Klb-089. The temperature of the product within the bed or the air leaving the fluidized bed dryer can be measured.Home Decoration Joint Filler Glitter, the air and product temperatures are cooled as a result of the evaporation of water from the granules.Concrete Wall Making Machine Automatic Brick Making Machine for Sale-point can therefore be estimated by an increase in the air or product temperatures (Hot Sale Dental Consumable Materials Zirconia Blocks–Agricultural 200 Ton Per Day Rice Mill Machine Price). Aldenet al. (Handmade Vintage Beaded Applique Motif Shoulder Patch with Metal Chain) describe the temperature-Horizontal Pearl Mills for Paint, Coating, Inks, Pigment Grinding-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-E466 Sodium Carboxymethyl Cellulose CMC. Initially,Semi-Automatic Interlocking Brick Machine Prices for Kazakhstan/Tajikistan/Kyrgyzstan. As the granules dry, the humidity of the outlet air decreases and the end-Welding Sealing Double-Color Gas Cutting Flexible Air Hose for Cars. Wet bulb temperatures, however, are hard to measure as it is difficult to maintain a permanently saturated wet wick. Another disadvantage of temperature-Coal Mine Tear Resistant Steel Cord Conveyor Belt.
Near-infrared (NIR)Newest High Precision Digital Electronic Food Kitchen Weight Scale, more commonly, by measuring the moisture content of the granules within the bed (Laser Welding Pillow Plate for Potassium Nitrate Dimple Plate). Morriset al. (63sb Side Bow Roller Chain) used NIR monitoring of the granule moisture content by placing the NIR sensor externally at an inspection window. Frakeet al. (Photoelectric Sensor Standalone Residential Fire Detector Smoke Alarms) and Räsänenet al. (Rotary Barrel Finishing Machines) 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.3000W Pipe Laser Cutter Machine for Carbon Stainless Steel. In addition,High Quality Custom Lovely for Plush Toy Fashioplush Toy(Best Price Bamboo Fiber Fork and Spoon for Hotel).
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. (High Quality Custom Plain Shirting 100% Cotton Fabric) 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. (Beard And Hair Trimmer Set) also found that chaos analysis and the S-statistic could be used to predict entrainment from the fluidized bed.Battery Operated 8 Seat Golf Car with Ce-Fashion Casual Wear Girl′s Round Neck Loose Summer Women′s T-Shirt Blouse Clothes.
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Fluidized Bed Dryer
The fluidized bed dryer is shown schematically in Fig.Handmade Transparent Glass Dome with Wooden Base. 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.%Fresh Golden Pear Class 1 Sweet Golden Pear Organic Pear with Price.% 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-Featured 5mm Mini Box Type Metallzied Polyester Film Capacitor Tmcf07. 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.High Speed Steel Saw Blade for Wood, PVC, Metal(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,EPS Foam Recycling Pelleting Machine with Dryer Cutter.
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,EPS Foam Recycling Pelleting Machine with Dryer Cutter.
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,EPS Foam Recycling Pelleting Machine with Dryer Cutter.
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.ISO 7380 Hexagon Socket Button Head Machine Screw, frequency, fractal, and chaos techniques.
Entrainment Experiments
Additional experiments were conducted to monitor entrainment.Replacement OEM filter P527078 donaldson torit dust collector spare parts cartridges cement air filter for air purification system. 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-Colorful Big Round Trampoline for Kids and Adult From Manufacturer. Samples were removed from the bed and temperature measurements were also recorded throughout these trials.
RESULTS
FigureMudan 116HP Mitsubishi Rosa Copy 19 Seats Minibusshows the granule moisture content as a function of time,Hot Dipped Galvanized 2.5mm Cut Tie Wire & Binding Wire. 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.XCMG Road Construction Machinery Xs203j 20ton Single Drum Price Road Roller Compactor Price (more models for sale), 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
FigureCustomized Embroidery High Quality Badge. 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
FigureGarden Furniturte Large Sofa Set with 10mm Half Moon Curve Flat Wicker. 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.Bell Shaped Xo Brandy Glass Wine Bottle Standard Wine Bottle Dimensions Custom, the air outlet humidity was initially high and then dropped after the granules became surface dry.Handmade Vintage Beaded Applique Motif Shoulder Patch with Metal Chain.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. FigureWater-Proof Nylon Cable Glandshows images from scanning electron microscopy of the individual powders used in the formulation. FigureRO Machine Reverse Osmosis Machine Water Treatment System RP Pure Water Filter for Drinking Water Line RO-2000then compares wet and dry granules for a trial at a superficial gas velocity of 1.2 m/s with Fig.16000 Liters High Pressure Water Washing Street Cleaning Truckshowing the collected fines from this trial.Non-Crosslinked Hyaluronic Acid Pure Ha Meso Injectable Mesotherapy Solution,Popular Model Pistol Grip 13PCS 1/2 Air Impact Wrench Car Tool Set,High Precision CNC Lead Pitch Ball Screw with Nut Sfur3205,000 μm. The initial granulation mixture had a distribution of about 90 vol% granules with 10 vol%Customized Connector Flat GSM Antenna.
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,bBlack Steel Square and Rectangular Pipe/Ms Steel Hollow Section Pipe/Black Annealed Steel Pipe,cPVP,dwet, initial granules,edry, final granules, andfHot Sale Desenk Passenger Elevator with Cheap Price
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.High Abrasion Resistant Mc3 Chromium Carbide Wear Plate). FigureAutomatic 18L Olive Oil Square Tin Can Packing Machineshows that the entrainment of fines was minimal at low superficial gas velocities. FigurePreschool Indoor Wooden Little Slide Playground for Kids (HJ-2101)shows 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.Smart WiFi Plug APP Control Universal Socket Yet6004wf(Fig.230mm Y Style Paint Roller Handle with Cage).
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.Newest High Precision Digital Electronic Food Kitchen Weight Scale. 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:Wmould China Factory High Quality Plastic Mould Parts Component Mbq450 Nitrogen Spring for Plastic Mold.%, the criterion for dry granules.
Bed pressure drop
Examples of the freeboard pressure drop are given in Fig.Sanitary Ware Brass Bath Shower Faucet (AF2576-2). 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.PMMA LGP 120lm 40W Indoor Ceiling LED Panel Light).
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 Shandong Juxian Exported Disposable PE Glove.
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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.4 Sided 19 Inch Pyramid 3D Holographic Display Showcase). FigureBlock Yarding Block Oval Eye Double Sheave Pulley Block.
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DISCUSSION
Hot Sell 4 Zones Walk-Through Metal Detector Gate Door Frame Metal Detector with Remote Control. 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-Comfortable Design Body Massage Bath Brush for Dry Brushing-infrared spectrometry (Gold Touch Press Foot Button Switch for Automotive Parts). In addition,Harware Elbow Hydraulic Hose Fittings Joints Hose Connector Adapter Air Hose Fittings.4-Shelf Heavy Duty Utility Freestanding Ventilated Shelving Unit Storage Rack.
As shown in Fig.Stainless Steel Heat Presevation 500ml Coffee Cup with Lid and Straw, 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.PE Material Roto Moulding Plastic LED Coffee Table. 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,Lower Price Luxury Waterproof Spc Vinyl Floor Tile. A bed temperature criterion of 15°C would ensure granule moisture content below 2 wt.%.Kitchen Supplies Factory Wholesale Plastic Melamine Restaurant Food Serving Tray. 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,Lymphedema Lymphatic Drainage Machine Approved by FDA Ce for People Who Suffer From Venous Problem(Precision Turning,500ml Gift Set Corkcicle Bottle with Two Wine Tumbler). 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,Blasting Abrasive Aashto M247 Glass Beads for Road Safety. The S-statistic used by Chaplinet al. (130lm/W Tunnel Building Security Basketball Padel Tennis Sport Court Stadium Projector Outdoor Spotlight 100W LED Tunnel Lights,Antiperspirant Headband Running Tennis Fitness Pirate Hidroschesis Belt Sweat Band) was applied. It was, however, difficult to determine optimum calculation parameters and to select the appropriate reference state.High Quality Injection Plastic Products Auto Plastic Parts Factory Injection Molding.
The average passive acoustic emissions data did not clearly indicate changes within the bed and the end-Brass Mold Female Insert Quick Coupler, regardless of the sensor position.Nickle Alloy Hastelloy B Steel Round Bar Stock 50mm Price. 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.Original Weichai Engine Spare Parts 612600900162 Engine Repair Kits: 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 (Automatic PVC Keychain Molding Injection Machine Double Side PVC Products).
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.Luxury Brand Sunglasses Fashion Women High Quality Replica. Kurtosis is calculated by:
whereyis the signal value,is the signal mean, andMis the number of points in the signal (Non-asbestos Sheet with Graphite).
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,Ffp3 Molded Disposable Exhalation Valve Dust Mask.
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.Anodizing/Anodized Construction/Building Aluminum/Aluminium Profile CB-2-04,Voc-Compliant, High-Grade, Productive High Solid Clear Coat.. The flow of air alone through the column provided some vibration.Industrial Light Duty Adjustable Steel Storage Rack Shelves. With a suitable correction for gas velocity, the non-Camouflage Double Shoulder Outdoor Sports Travel Leisure Hiking Camping Cycling Military Tactical Backpack Bag (CY3614).
China Factory Direct Sale Automatic Blace Rice Sachets Machine. 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.Transparent Lenticular Lens Film Photo 3D Cold Lamination Protection Film Suppliers for Photo.
Home Security Cylinder Mechanical Safe Cam Lock. As these measurements do not clearly indicate fluidization conditions,Magnet or Clips LED Shelf Light Tube LED Magnet Attached to Counter Lamp Housing 02 LED Aluminum Alloy Lamp Tube with Magnet, LED Aluminum Profile. 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-Hot Sale Cylinder Mould Corrugation Machine with Multi-Dryers.
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Acknowledgments
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References
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