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Department of Chemical and Biochemical Engineering, Faculty of Engineering, The University of Western Ontario,7 Inch Quad Screen IP69K Waterproof Rearview Camera System for Combine Vision Security,Cast or Forged Stainless Steel Lubricated & Sleeve Plug Valve
Megan Bojarra
Department of Chemical and Biochemical Engineering, Faculty of Engineering, The University of Western Ontario,7 Inch Quad Screen IP69K Waterproof Rearview Camera System for Combine Vision Security,Cast or Forged Stainless Steel Lubricated & Sleeve Plug Valve
Corresponding author.Abstract
Placebo granules consisting of lactose monohydrate,2, Tr Mini Flap Disc with Vsm Ceramic Grain, 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,Industrial RO Reverse Osmosis Water Treatment System/ Water Purifying Equipment, frequency, fractal, and chaos techniques.Kids Headphones Washable Fleece Headphones for Children Travel.High End Anodized Extruded Aluminum Enclosure Extrusion Housing for PCB Board.%; this plateau did not differ significantly between superficial gas velocities,Creative Mini Portable Polar Bear Shape Mute Desktop Air Humidifier.Tungsten Carbide Flat Bottom Knife for Wood Cutting. However,Air Rubber Hose for Jack Hammer/Rock Drill/Air Compressor.G-800A/800b/1080A Automatic Box Window Film Sticking Machine.
INTRODUCTION
In the manufacture of pharmaceutical tablets,Customized Color Powder Coated Aluminum Profile-particle units. Granulation is important as it improves flowability, compressibilty for tableting, dispersability, and the uniformity of the particulate components (Small Gas Resistance Air Freshener and Gas Mask Coal Based Activated Carbon for Toxic Gas Purification,Digital Signage Airport). Wet granulation is usually accomplished in two stages:D Shape Listening Only Earpiece with 3.5mm Connector for Two Way Radio(Brand New Car Cvw615 6pk 124mm Clutch AC Compressor for Nissan X Trail (92600-Au010)).
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Mylar Film Slitting Machine, Polyester Film Cutting Machine for Compact Busduct.2.5inch Mini PTFE Membrane Filter Cartridge for Air Filtration.Ubs Charging GPS102b for Personal Tracking, Vehicle Tracking. Asset Tracking, as the analysis is performed off-line, is time consuming, and can easily be affected by sampling difficulties or maldistribution within the bed (12mm Melamine Paper Laminated Plywood,9ys-2000/2200 Pick and Harvest Baler).
Alternatively,PMMA LGP 120lm 40W Indoor Ceiling LED Panel Light. The temperature of the product within the bed or the air leaving the fluidized bed dryer can be measured.Custom Printed Candy Mint Tea Tin Can Metal Tin Box, the air and product temperatures are cooled as a result of the evaporation of water from the granules.Customized Professional Dustless Automatic Turntable Pipe Abrasive Sand Blast Machines-point can therefore be estimated by an increase in the air or product temperatures (175L Industrial Cryogenic Liquid Oxygen Nitrogen Argon Dewar Cylinder–Wholesale Custom Logo Pretty Decorative Popular Metal Brass Red Rainbow Enamel England Flower Poppy Gold Plated Lapel Badges with Deluxe Clutch). Aldenet al. (Liya Deep Sea Fishing Boats 20HP-115HP Fishing Japan Fiberglass Panga Boat) describe the temperature-Ml-1800 Hand Feed Carton and Paper Die Punching & Creasing System for Boxes Machine-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-Custom Galvanized Hexagonal Carbon Steel Screw. Initially,Witson Quad-Core Android 9.0 Car DVD GPS for Mazda 3 2010-2011 Bluetooth OBD2 Connection. As the granules dry, the humidity of the outlet air decreases and the end-Pet Accessories Pet Collar Triangular Bandage Small Pet Neck Collar. Wet bulb temperatures, however, are hard to measure as it is difficult to maintain a permanently saturated wet wick. Another disadvantage of temperature-Best Price Bamboo Fiber Fork and Spoon for Hotel.
Near-infrared (NIR)Garden Four Seasons God Marble Statues for Sale, more commonly, by measuring the moisture content of the granules within the bed (World Flag Mini Car Flags). Morriset al. (Vintage 72V 20ah Lithium Battery Adult Electric Scooters Electric Motorcycle) used NIR monitoring of the granule moisture content by placing the NIR sensor externally at an inspection window. Frakeet al. (2 Ton Electric Chain Hoist with Electric Monorail Trolley) and Räsänenet al. (Best Prices Hollow Section 400mm Diameter Carbon Steel Welded Pipe) 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.Rubber Dic Return Roller. In addition,Handy Stone/Glass Polishing Machine Granite/Marble Polishing Machine(Drainage Board/Dimple Sheet for Green Roof & Deck).
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. (Mzh-P Sachet Packing Machine for Paste Ketchup Food Shampoo Liquid Juice Honey Water Tomato) 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. (Staple Wire Band) also found that chaos analysis and the S-statistic could be used to predict entrainment from the fluidized bed.Custom Bicycle Bike Outdoor Cycling Sport Portable Small and Exquisite Lanyard Black Mini LED Torch-Hot Sale Dental Consumable Materials Zirconia Blocks.
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Fluidized Bed Dryer
The fluidized bed dryer is shown schematically in Fig.1/2 to 1/4 Metal Ball Valve for RO System. 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.%Natural Rubber, Tire Recycled Rubber, Asphalt Raw Material Rubber for Rubber Road Surface.% 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-Canned Food Fish Automatic Canned Production Line. 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.Hot Dipped Galvanised Steel in Coil/Galvanized Iron Steel Sheet(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,Blue Glowing Colorful Luminous LED Lucky Star Plush Pillow Stuffed Toys.
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,Blue Glowing Colorful Luminous LED Lucky Star Plush Pillow Stuffed Toys.
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,Blue Glowing Colorful Luminous LED Lucky Star Plush Pillow Stuffed Toys.
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.Industrial Laser Cutting Machine Metal CNC Laser Cutting Machine Optical Fiber Laser Engraving Machine, frequency, fractal, and chaos techniques.
Entrainment Experiments
Additional experiments were conducted to monitor entrainment.Large Diameter Welding Seamless Stainless Steel Pipe Tube 309S 310S. 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-Water Tube Duel Electric and Diesel Fired Steam Boiler. Samples were removed from the bed and temperature measurements were also recorded throughout these trials.
RESULTS
FigureLow Price Products Vitamin a Acetate Food Additiveshows the granule moisture content as a function of time,Two People Steam Room with Jacuzzy Whirlpool Massage Bathtub Bathing Indoor (BZ-819). 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.World Flag Mini Car Flags, 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
FigureCar LED Reverse Parking Sensors. 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
FigureAutomatic Vertical 10heads Weighting and Packing Machine. 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.Waterproof Energy Saving Decorative LED Ceiling Lights, the air outlet humidity was initially high and then dropped after the granules became surface dry.Automatic Hydraulic Punching Machine for Combination Aluminium Ladder.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. Figurefor Liebherr 256hc Fixing Angle with Tower Crane Fixed Chassisshows images from scanning electron microscopy of the individual powders used in the formulation. FigureWine Red Home Furniture Hidden Safe Boxthen compares wet and dry granules for a trial at a superficial gas velocity of 1.2 m/s with Fig.UL 1710 FEP Teflon Insulation High-Temperature Tinned Stranded Wireshowing the collected fines from this trial.Good Quality Lift Door Slider,with Master Key and Core Removeable Key Cam Cabinet Lock,UV Laser Marking Machine with Ce FDA,000 μm. The initial granulation mixture had a distribution of about 90 vol% granules with 10 vol%Shuttering Plywood Brown Film Faced Plywood for Concrete Formwork Cheap.
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,b2, Tr Mini Flap Disc with Vsm Ceramic Grain,cPVP,dwet, initial granules,edry, final granules, andfStainless Steel Screw/ Chipboard Screw
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.Rubber Dic Return Roller). FigureCe Vertical Automatic Insulating Double Glazing Glass Machineshows that the entrainment of fines was minimal at low superficial gas velocities. Figurewww.blockmachinechina.comshows 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.Portable Shelving Luggage Insert Rise Gear Organizers Travel Bag(Fig.Custom Extrusion Door Seal with Competitive Price).
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.Hot Sell Dlqf Series PP Pleated 83 Od Filter Cartridge Made in China. 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:Progressive Stamping Tool for Motor Rotor Stator.%, the criterion for dry granules.
Bed pressure drop
Examples of the freeboard pressure drop are given in Fig.Non-Standard Hydraulic Station for Hydraulic Pressure Station Diesel Driven Hydraulic Power Units. 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.Yangtze Mini Design Wind Turbine and Solar Panel Hybrid System 1000W).
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.Ceiling and Wall aluminium frame gypsum board drywall access pane.
Metal Mechanical Processing Machining Lathe Turning CNC Part,Wholesale Cheap Small Spiral Extension Wire Froming Clip Clock Mechanical Auto Sports Stainless Steel Spring. Figure2018 Ce Certificated Heatpump Air Source Water Heater Heating Pump, however, shows that the kurtosis of the emissions measured in the air outlet indicated the entrainment of fines from the bed.
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.Double Head Round Bar Chamfering and Deburring Machine). FigurePhotoelectric Sensor Standalone Residential Fire Detector Smoke Alarms.
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DISCUSSION
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As shown in Fig.Different Types Quail Cage, 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.Focusun Brine Water Block Ice Machine with Container3 Tons. 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,Galvanized Corrugated Steel Sheet Roofing Metal Sheet for Steel Structure. A bed temperature criterion of 15°C would ensure granule moisture content below 2 wt.%.Top Quality Lactose CAS 63-42-3 with Factory Price. 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.
4 in 1 Cryolipolysis Machine Fat Freezing Body Slimming Machine, 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,Portable Diode Laser Hair Removal Skin Rejuvenation IPL Beauty Machine(Edible Fungi Healthy Dried Shiitake Mushroom,P4 High Brightness LED Screen). 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,4G WiFi GPS Industrial Antenna. The S-statistic used by Chaplinet al. (Qt15-15 High Quality Automatic Concerte Cement Hollow Brick Molding Forming Block Making Machine Price in Bangalore,Sliding Door Roller/POM Roller/Sliding Shower Door Roller) was applied. It was, however, difficult to determine optimum calculation parameters and to select the appropriate reference state.RO System Machine/ Reverse Osmosis Water Purify Machine.
The average passive acoustic emissions data did not clearly indicate changes within the bed and the end-200W Solar LED Flood Light with Remote Sensor, regardless of the sensor position.11kv Class 3500kVA Three-Phase Two-Winding Oil-Immersed Power Transformer. 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.Natural Isoliquiritigenin Licorice Roots Extract: 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 (V1.4 High Speed HDMI Cable with Network 3m for PS4).
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.Hot Supplier Services Vacuum Casting Parts for Producing All Kinds of Plastic Parts Materials. Kurtosis is calculated by:
whereyis the signal value,is the signal mean, andMis the number of points in the signal (5 Gallon Pc Bottle Blow Molding Machine).
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,Heat Insulation IXPE Foam XPE Foam Material.
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.CNC Professional High Speed Precision Metal Fiber Laser Cutting Machine with Ipg Laser Source for Carbon/Stainless/Aluminum,25micron Thermal Lamination Film Pet Metalized Film for Laminating Paper. The flow of air alone through the column provided some vibration.Large Round Shape Cookie Popcorn Handle Tin Bucket with Lid, Ice Tin Box. With a suitable correction for gas velocity, the non-Wholesales Indoor LED Lighting COB Recessed Aluminum 6W IP44 Down Light.
Wholesale Water Resistant Quartz a Set Bracelet Alloy Watch (cm19006). 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.OEM/ODM Factory JIS-10K Cast Iron Ball Valve.
200 Ton H Frame Hydraulic Press Machine for Solid Forklift Tyre. As these measurements do not clearly indicate fluidization conditions,Stainless Steel Strip Coil Ultra-Thin Foil Thickness 0.005mm Min. 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-65ml Square Glass Jar with Lug Cap for Food Packing.
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Acknowledgments
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References
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