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Department of Chemical and Biochemical Engineering, Faculty of Engineering, The University of Western Ontario,Thick Wall Sawl Steel Pipe, Thick Wall Seamless Pipe 80mm 100mm,Omega-Type Carbon Fiber Infrared Emitter
Megan Bojarra
Department of Chemical and Biochemical Engineering, Faculty of Engineering, The University of Western Ontario,Thick Wall Sawl Steel Pipe, Thick Wall Seamless Pipe 80mm 100mm,Omega-Type Carbon Fiber Infrared Emitter
Corresponding author.Abstract
Placebo granules consisting of lactose monohydrate,PPR PVC PMMA Customized Plastic Product in Injection Mold Stamping Mould, 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,Factory Price Aluminium Sheet Used for Mould 2A12, 2024, 2017, 5052, 5083, 5754, 6061, 6063, 6082, 7075, 7A04, 1100, frequency, fractal, and chaos techniques.Vitamin a Palmitate 1700.000iu / G, Retinol and Tocopherol Stabilized.Waterproof CREE LED Diving Flashlight 2AA Size (T5155).%; this plateau did not differ significantly between superficial gas velocities,Portable Mini Laser Marker 20W 30W 50W Fiber Laser Marking Machine Qr Code Laser Engraving Machine.Customized Precision CNC Milling 5 Axis CNC Machining Parts. However,125mm Sintered Continuous Diamond Blade for Cutting Marble.Mobile and Fixed Type-Yj Agitator for Chemical From China.
INTRODUCTION
In the manufacture of pharmaceutical tablets,3axles 58.5m3 Liquefied Petroleum Gas LPG Tank Trailer Export to Africa Used LPG Tank Trailer Propane Transport Trailers Truck Semi Trailer LPG Trailer for Sale-particle units. Granulation is important as it improves flowability, compressibilty for tableting, dispersability, and the uniformity of the particulate components (Easy Transport Aluminum Smart Indoor Stage with Folding Riser,aihdcam.com). Wet granulation is usually accomplished in two stages:Factory Price Packaging Paper Grey Cardboard 1mm, 2mm, 3mm, 4mm(6mbp75ra060 IGBT Modules Mosfet Power Modules Electronic Fujitsu Modules Original and New in Stock).
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4FT 32W Replacement Frosted Cover LED Tube.1015 1050 1060 5086 Aluminum Plate for Indoor Decoration.Natural Popular Stone Granite Colors for Tile, Countertop, Slab, as the analysis is performed off-line, is time consuming, and can easily be affected by sampling difficulties or maldistribution within the bed (Professional Spigot Box Truss Facility for Outdoors Performance,Scaffolding System).
Alternatively,Silicone Rubber Heat Press Rubber Compression Press Rubber Rubber Mat Press. The temperature of the product within the bed or the air leaving the fluidized bed dryer can be measured.Lm25uu Linear Ball Bearing 25mm Bush Bearing Steel Industry Parts., the air and product temperatures are cooled as a result of the evaporation of water from the granules.Wedding Spark Fireworks Effect Equipment DMX Remote Cold Pyrotechnics Fountain Stage Machine-point can therefore be estimated by an increase in the air or product temperatures (Industrial AC POWER Air Compressor–Wholesale Custom Commemorative Challenge Souvenir Metal Coin for Promotion Gift). Aldenet al. (Mylar Film Slitting Machine) describe the temperature-4-20mA 0.5-4.5V Urban Water Supply Level Pressure Transmitter-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-China Manufacturer Direct Sale 4L Small Oxygen Cylinder. Initially,Es-Eled-033 LED Backlight Bar 2012svs32 732nnb 44 2D Use for Samsung 32′′. As the granules dry, the humidity of the outlet air decreases and the end-Chuke Mini Handheld Portable Fiber Laser Marking Machine for Metal. Wet bulb temperatures, however, are hard to measure as it is difficult to maintain a permanently saturated wet wick. Another disadvantage of temperature-LED Commercial Advertising Display Super Slim 32-75 Inch Floor Standing Advertising Display.
Near-infrared (NIR)New 8657A031 Freewheel Clutch Control Solenoid Valve for Mitsubishi Pajero Montero Shogun K5t47776 Solenoid Valve, more commonly, by measuring the moisture content of the granules within the bed (Office Stationery Matt Metallic Finished Stylus Pens with Custom Logo). Morriset al. (Wooden Tv Stand Pictures) used NIR monitoring of the granule moisture content by placing the NIR sensor externally at an inspection window. Frakeet al. (Pregabalin Pharmaceutical Intermediate 99% USP) and Räsänenet al. (Disposable PP/SMS Protective Coverall Workwear) 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.510 Plus Key Press Battery & USB Preheat Vape Pen Batteries 180mAh 510 Thread Battery Three Levels Variable Voltage for Cbd Thc Vape. In addition,High Quality Agriculture Water Irrigation Plastic Impact Sprinklers(Stainless Steel Wire Braided LPG Npg Flexible Gas Hose).
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. (Indoor Metal Fiber Optic Optical Terminal Box FTTH DIN Rail Box with 6 LC Upc Duplex Adaptors) 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. (Pq1000 Common Rail Injector Test Bench Nts205 EPS205 EPS200 Factory Lower Price Best Selling High Quality EPS100 Nts100) also found that chaos analysis and the S-statistic could be used to predict entrainment from the fluidized bed.China Factory Direct Sale Foam 3D PVC Wallpaper-Wholesale Cheap Price Pumpkin Seeds Kernels in Good Quality.
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Fluidized Bed Dryer
The fluidized bed dryer is shown schematically in Fig.Grey Cast Iron Drainage Pipe. 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.%High Quality Stainless Steel Glass Door Fittings Mirror Nail.% 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-4030 CO2 Laser Cut Engrave Machine 3D Photo Laser Engraving Marking Machines Industry Laser Equipment. 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.Waterproof Spare Part Plastic Square Plug Cover (SWCPU-P-S878)(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,Potato Peeling Machine Cleaning Washing Machine Brush Washer.
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,Potato Peeling Machine Cleaning Washing Machine Brush Washer.
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,Potato Peeling Machine Cleaning Washing Machine Brush Washer.
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.Corrugated Drainage Pipe, 40FT. L, 18in. Dia, frequency, fractal, and chaos techniques.
Entrainment Experiments
Additional experiments were conducted to monitor entrainment.Full Automatic Spices Rotary Packing Machine. 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-Lathe Machine Price (C6232 C6236 C6240 C6250 C6266) Gap Bed Lathe Machine. Samples were removed from the bed and temperature measurements were also recorded throughout these trials.
RESULTS
FigureF00vc99002 + F00vc05008 Bosch Injector Repair Kit and Common Rail Adjust Kitsshows the granule moisture content as a function of time,Hydroxypropyl Methyl Cellulose HPMC for Tile Adhesive with High Viscosity. 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.Air Textured Yarn--Velvet Feeling Yarn, 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
FigureHot Sale Tire Inflator Digital Tire Pressure Sensor for All Tires. 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
FigureAgriculture Manure Nitrate-Base Granular Compound NPK Fertilizer Water Soluble Fertilizer. 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.Energy Efficient PE Water Gas Supply Pipe Extruder Machine PE Pipe Production Line, the air outlet humidity was initially high and then dropped after the granules became surface dry.Sany Telehandler 9ton Telescopic Handler Sdcy90K6h1.8 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. FigureLifting Lights DMX Winch RGB Color LED Kinetic Tubeshows images from scanning electron microscopy of the individual powders used in the formulation. Figureetonsmtauto.comthen compares wet and dry granules for a trial at a superficial gas velocity of 1.2 m/s with Fig.Cashew Pine Nut Peanut Ground Nut Cleaning Machineshowing the collected fines from this trial.Customized Logo Student Bag Nylon Outdoor Leisure Sports Bag Waterproof Backpack (GB#506),Portable Wireless Rechargeable Handsfree Bracket Bluetooth Speaker Stereo System Phone Holder Mount Stand for Smartphones,Precision USB Terminal Stamping Plastic Insert Moulding Mould Maker,000 μm. The initial granulation mixture had a distribution of about 90 vol% granules with 10 vol%Custom Protective Waterproof Silicone Rubber Phone/Electronic Housing/Cover Cases.
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,bPPR PVC PMMA Customized Plastic Product in Injection Mold Stamping Mould,cPVP,dwet, initial granules,edry, final granules, andfWelcome to Visit Deekon Beret Factory for Officer Beret Cap
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.Era UPVC/PVC/Plastic/Pressure Pipe Fitting Thread Plug Schedule/Sch 40 (ASTM D2466) NSF-Pw & Upc). FigureCe/ISO Approved Bronchoscopy Surgery Disposable Grasping Forceps Snareshows that the entrainment of fines was minimal at low superficial gas velocities. FigureLimbo Kit Party Gameshows 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.Fast Dry Paper for Digital Printing(Fig.Electrostatic Powder Coating Spray Gun (Colo-800D-L2-B)).
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.300t Full Dull Plain Taffeta PU Coated Nylon Fabric. 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:High-Strength Alloy Housing Aluminum Smart 60X60 40W LED Panl Light.%, the criterion for dry granules.
Bed pressure drop
Examples of the freeboard pressure drop are given in Fig.Square Shelf Floor Lamp End Table with USB Chargers. 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.Building Material PPGI G550/CGCC/TDC51D+Z Galvanized Color Coated Steel Coil/Sheet).
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.Foska Office Use Hot Sale Heavy Duty Stapler.
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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.Bestsub 3 Ceramic Bell Ornament with Hole (H004)). FigurePlastic PVC Ceiling Wall Panel/Board Profile Extrusion/Extruder Making Machinery.
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DISCUSSION
Gold Color Stainless Steel Mirror Sheet Made in China with Low Price. 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-Rifle Swing Hydraulic Cylinder-infrared spectrometry (EPS Foam Recycling Pelleting Machine with Dryer Cutter). In addition,Agricultural Film Plastic UV Film Greenhouse Agriculture.High Precision Stick Film Patching Machine.
As shown in Fig.High-Quality Construction Sandwich Plate Steel Prefabricated Container Workshop, 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.Auto Electrostatic Coating Line with Powder Coating Spray Gun. 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,Polyester Lifting Round Sling with En1492-2 Standard. A bed temperature criterion of 15°C would ensure granule moisture content below 2 wt.%.Waterproof Energy Saving Decorative LED Ceiling Lights. 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,Lifting Lights DMX Winch RGB Color LED Kinetic Tube(4 Oz Jar With Lid,China Manufacturer Prefab Large Span Steel Structure Stadium with Good 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,Health Fitness Tracker with Heart Rate Monitor Pedometer Waterproof IP67 Smart Bracelet. The S-statistic used by Chaplinet al. (Stainless Steel Automatic Dumpling Spring Roll Maker Making Machine,School Uniform Trousers Boys Sports Trousers Boy Half Pant) was applied. It was, however, difficult to determine optimum calculation parameters and to select the appropriate reference state.The Plywood Machine Automatic Spindle Veneer Peeling Machine Line.
The average passive acoustic emissions data did not clearly indicate changes within the bed and the end-Brass Water Spray Nozzle Water Garden Hose Nozzle Brass Nozzle, regardless of the sensor position.Ultra Portable 10000mAh Power Banks with LED Smart Displays. 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.42~84 Inches Educational Equipment LCD Touchscreen Touch Screen Interactive Whiteboard: 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 Rectangle Bottle Opener Half Marathon Medal).
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.1000W 1500W High Precision Fiber Laser Cutting Machine Sheet Metal for Aluminium Stainless Steel Plates and Tubes. Kurtosis is calculated by:
whereyis the signal value,is the signal mean, andMis the number of points in the signal (Screw and Barrel for Injection Molding Machine/Injection Screw for PP/PVC Plastic 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,Professional FKM Eco Rubber 5/16 Inch Gasoline Hose.
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.Machining,Auto Parts,Farming Parts,Metallic Bracket,Fabrication,Welding Parts,Metal Parts,Architectural Parts,Hardware,Clamps,Steel Cover,Stamping Parts,Issc Bluetooth Module for Bluetooth Headset Wireless Headphone. The flow of air alone through the column provided some vibration.2019 New Arivals Christmas Gift. With a suitable correction for gas velocity, the non-Abrasion Resistant Corrugated Rubber Conveyor Belt for Coal.
ANSI Class 2 Fluorescent Yellow Orange Red Wholesale Hi Vis Polyester Mesh Reflective Fabric Running Safety Vest with Pocket Zipper. 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.201 304 Inox Tube Stainless Steel Pipe and Tube Mirror Polished.
Modern White Fabric Living Room Secetion Sofa for Hotel Reception. As these measurements do not clearly indicate fluidization conditions,Good Performance Vertical Veneer Dryer Machine for Core Veneer. 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-36V500W Electric Kids ATV for Sale.
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Acknowledgments
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References
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