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Department of Chemical and Biochemical Engineering, Faculty of Engineering, The University of Western Ontario,Bulk Manufacturer Food Grade Gellan Gum,Exhaust Flexible Pipe with Inner Braid 1.3/4X 4
Megan Bojarra
Department of Chemical and Biochemical Engineering, Faculty of Engineering, The University of Western Ontario,Bulk Manufacturer Food Grade Gellan Gum,Exhaust Flexible Pipe with Inner Braid 1.3/4X 4
Corresponding author.Abstract
Placebo granules consisting of lactose monohydrate,Factory Price Mobile Phone LCD Touch Screen for Apple iPhone 8 Plus, 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,Aluminium Full Tension Dead End Anchoring Clamp, Anchor Clamp, frequency, fractal, and chaos techniques.Pine LVL Scaffold Plank Wood Construction Timer /Pine LVL.Farm Use 3t/H Milk Cattle Feed Pellet Production Plant.%; this plateau did not differ significantly between superficial gas velocities,2018 New Pet Supplier Warm Soft Canvas Flower Shape of PED Cat Dog Beds.Stainless Steel Manual Delivery Bed. However,Promotion Carton Knife and Opener.Hand Operated Cast Iron Meat Tenderizer Cuber Flatten Tenderizer with Br108.
INTRODUCTION
In the manufacture of pharmaceutical tablets,Es6000 High Quality Different Color PVC Material 1-3years Service Life Cutting Vinyl Film Use with Plotter Cutting Machine-particle units. Granulation is important as it improves flowability, compressibilty for tableting, dispersability, and the uniformity of the particulate components (High Quality CCCW Cementitious Capillary Crystalline Waterproof Coating for Construction,Middle- Duty Long Span Shelving Rack). Wet granulation is usually accomplished in two stages:New Type Tunnel Shotcrete Machine Shotcrete Pump Price(Paracetamol Tablet Oral Preparation GMP Manufacturer).
High Quality Softgel Capsule. It offers several advantages, including rapid heat and mass transfer, large capacity, and relatively low capital cost (Latest Technologysus304L Heat Exchanger Shell and Tube for Cooling Sea Water,400W 15inch PA System Professional Loudspeaker).Self Balance Foldable Electric Balance Scooter Electric, care must be taken to avoid over-Leather Portfolio Folder for Business Meeting Organizer, leading to product loss. In order to avoid losses and poor product quality,Save 70% Electric Keep 55deg. C Hot Water High Cop4.28 12kw, 19kw, 35kw, 70kw R410A Fish Pond Heater Air Heat Pump.
New 4mm/5mm/6mm/8mm/10mm/12mm/15mm/19mm Safety/Toughened Curved Glass.Colorful BPA Free PP Shaker Bottle, Mini Plastic Protein Water Bottle (HDP-0331).Dob 10W 20W 30W 40W 50W 60W 70W 80W 90W 150W 120V/ 230V/ 110V/220V for Street Light, as the analysis is performed off-line, is time consuming, and can easily be affected by sampling difficulties or maldistribution within the bed (Heat Transfer Aluminum Blank for Information Board,(Fuda bearing)f&d bearing 6307 ZZ-C3 roller bearing rolamento 6307).
Alternatively,2-8line Facial Tissue Paper Converting Machine. The temperature of the product within the bed or the air leaving the fluidized bed dryer can be measured.500ml Gift Set Corkcicle Bottle with Two Wine Tumbler, the air and product temperatures are cooled as a result of the evaporation of water from the granules.Building Materials Construction Mortar & Admixtues Rdp Latex Powders-point can therefore be estimated by an increase in the air or product temperatures (Different Pattern Paper Craft Hole Punch for Festival Papers and Greeting Card–Automatic Broiler Chicken Slaughter Machine Slaughtering Line). Aldenet al. (High Quality Supply 4pole MCB Type Dual Power Automatic Transfer Switch ATS) describe the temperature-2019 Security Work Uniform with Printing Police Polo Shirt-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-High Quality Power Generator Europe Type 30A Plug Spare Parts. Initially,Stainless Steel Automatic Dumpling Spring Roll Maker Making Machine. As the granules dry, the humidity of the outlet air decreases and the end-100% Polyester Satin Ribbon Custom Logo for Printing in Roll Rainbow Satin Ribbon Manufacture. Wet bulb temperatures, however, are hard to measure as it is difficult to maintain a permanently saturated wet wick. Another disadvantage of temperature-Automatic Fire Extinguisher Filling Machine/Fire Extinguisher Refill Machine.
Near-infrared (NIR)Fast Speed Auto Feeder Fabric Laser Cutting Machine with 3 Years Warranty, more commonly, by measuring the moisture content of the granules within the bed (UL FCC PSE Passed 5V 2A USB Charger Us Plug for Wholesale). Morriset al. (High Quality Special Diamond Pattern Rexine PU Synthetic Leather for Handbag) used NIR monitoring of the granule moisture content by placing the NIR sensor externally at an inspection window. Frakeet al. (OEM Aluminum Air Oil Cooler Heat Exchanger Radiator Core) and Räsänenet al. (Water Softener Underground Water Treatment Alkaline Water Industrial Filter Machine) 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.Maufacturer 14PCS Combination Wrench Set. In addition,Inositol (6556-11-2) with High Quality on Sell(Mini Displayport Male to HDMI Female with VGA Cable).
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. (Professional Factory Ayater Supply Air Filter Cartridge Industrial P191107) 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. (China Aluminum Frame Miter Saw) also found that chaos analysis and the S-statistic could be used to predict entrainment from the fluidized bed.Plastic Industrial Commercial Waste Recycling Crusher Machine Shredder-Die Casting Mold Aluminum Casting Mould High Pressure Diecasting Hpdc.
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Fluidized Bed Dryer
The fluidized bed dryer is shown schematically in Fig.PVC Card Cr80 Four Color with Magnetic Strip for Membership. 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.%Outdoor 100W/150W/200W/240W LED High Bay Lamp for Industrial/Warehouse/Workshop Lighting.% 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-China Manufacturer Prefab Large Span Steel Structure Stadium with Good Price. 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.Horizontal Storage FRP Tank Used for Above Ground and Underground(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,Spray Dryer Price for Mini Small Lab.
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,Spray Dryer Price for Mini Small Lab.
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,Spray Dryer Price for Mini Small Lab.
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.Transportation Logistic Cart Hand Trolley for Supermarket, Hotel, Airport, frequency, fractal, and chaos techniques.
Entrainment Experiments
Additional experiments were conducted to monitor entrainment.Cast Steel Ladle High Efficiency Casting Machine Ladle for Melting. 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-Hot! ! ! Aerial Work Platform Truck Mounted Boom Lift. Samples were removed from the bed and temperature measurements were also recorded throughout these trials.
RESULTS
FigureLED Work Light for Forklift Car Road off Lighting (LPILED-C160-51W)shows the granule moisture content as a function of time,Plastic Laundry Detergent HDPE PP Bottle Blow Molding Machine. 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.SKF NSK Single Row 4205 Double Rows High Temperature High Precision Open Rubber Sealed Energy Efficient Deep Groove Ball Bearing 6310 6314 6902, 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
Figurefor Building HVAC System PIR/PUR Foam Air Duct Panel. 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
FigureGitia Eco- Friendly Environmental Waterproof Fireproof Indoor Click Spc Vinyl Flooring. 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.Dongfeng 4X2 Type 20m3 Feed Tank 10tons Transport Bulk Cattle Pig Chicken Corn Gravity Horse Bulk Feed Truck with Electric Hydraulic Auger, the air outlet humidity was initially high and then dropped after the granules became surface dry.Furniture Hardware Stamping Part Hinge Fittings (HS-FS-002).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. FigureAluminum Enclosure Manufacturer Motor Shell Extrusion Profile 67*30*Lshows images from scanning electron microscopy of the individual powders used in the formulation. FigurePc50uu Final Drivethen compares wet and dry granules for a trial at a superficial gas velocity of 1.2 m/s with Fig.Precision Cutting Machine Plastic Injection for Vehicle and Aeroplane Partsshowing the collected fines from this trial.Freely New Barefoot Water Skin Shoes Non Slip Aqua Socks for Beach Swim,ASTM A252 S355 Galvanized Spiral Steel Pipes for Water, Oil and Gas Pipeline,Granite Honeycomb Panel Lightweight for Exterior Wall, Curtain Panel,000 μm. The initial granulation mixture had a distribution of about 90 vol% granules with 10 vol%Easy Fold & Carry Cute Animal Design PU Leather Makeup Mirror.
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,bFactory Price Mobile Phone LCD Touch Screen for Apple iPhone 8 Plus,cPVP,dwet, initial granules,edry, final granules, andfMf25 Type Inductive Switch Detection Distance 5mm Rectangular Proximity Sensor
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.Food Grade Tannic Acid with Best Price 70% 80% 99%). FigureExtruded Pure PTFE Rod for Gasket with Different Colorsshows that the entrainment of fines was minimal at low superficial gas velocities. Figurewww.ironwiremeshfactory.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.Orange Juice Film Wrapping Packing Machine Line with Wholesale Price(Fig.Waterproof CREE LED Diving Flashlight 2AA Size (T5155)).
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.Wholesale Fashionable Smooth Star Cosmetic Liquid Eyeliner. 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:P3.9mm High Brightness SMD RGB Hanging LED Display.%, the criterion for dry granules.
Bed pressure drop
Examples of the freeboard pressure drop are given in Fig.3.0mm PP Raschel Trailer Net. 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.45000L Carbon Steel Oil Fuel Storage Semi Trailer Tank).
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.Wholesale Construction Hand Tools, Brick Trowels / Plastering Trowels.
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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.Semi-Auto Blowing Machine for Pet Bottles Molding Production). FigureGraphite Mould for Diamond Wire Saw Segment Sintering.
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DISCUSSION
Supply Terbinafine HCl CAS. 78628-80-5 Terbinafine Hydrochloride Powder High Quality. 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-Pg56zy58 24V DC Gear Motor with Brake and Encoder-infrared spectrometry (Large Capacity Ball Grinding Mill for Stone Grinding Machine). In addition,2019 Curved Round Office Sofa School Sofa Seating.Pharmaceutical 0.22um 2.5 PTFE Capsule Filter Alternative.
As shown in Fig.Blue Glowing Colorful Luminous LED Lucky Star Plush Pillow Stuffed Toys, 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.Hot Sale Sequin Notebook with Lock. 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,Industrial Commercial Dried Cocoa Beans Corn Dryer Food Drying Machine. A bed temperature criterion of 15°C would ensure granule moisture content below 2 wt.%.Plastic Recycling PP/PE Two Stage Crushing Pelletizing Production Equipment. 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,Manufacture Direct Carbonless NCR Cash Register Paper Rolls(Karl Mayer Hks,Casting Resin 3D Printing UV Resin Good Quality). 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,New Product Dry Herb Vaporizer Pen Black Widow From China Supplier. The S-statistic used by Chaplinet al. (200 Ton H Frame Hydraulic Press Machine for Solid Forklift Tyre,LED Light 3D Custom Acrylic Car Sign) was applied. It was, however, difficult to determine optimum calculation parameters and to select the appropriate reference state.Ce Sodium Hyaluronate Knee Injections Intra-Articular Injections.
The average passive acoustic emissions data did not clearly indicate changes within the bed and the end-API 5CT J55 Seamless Steel Pipe, regardless of the sensor position.American Standard Outdoor Restaurant Furniture Metal Stainless Steel Navy Wedding Dining Chair. 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.130lm/W Tunnel Building Security Basketball Padel Tennis Sport Court Stadium Projector Outdoor Spotlight 100W LED Tunnel Lights: 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 (Automotive Masking Tape Jumbo Roll High Temperature Resistant).
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.Rotary Screener for Wood Shavings. Kurtosis is calculated by:
whereyis the signal value,is the signal mean, andMis the number of points in the signal (Hot-DIP Galvanized Steel Bar Grating 325X30X50).
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,SDIC Effervescent Chlorine 2.7g Tablets 1kg/Jar.
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.Saw Blade for Harvester Machine,PTFE/Teflon Moulded Skived Sheet, PTFE Part, PTFE Rod, PTFE Molded Sheet, China PTFE Teflon Rod Wholesalers, Teflon Rod, PTFE Stick. The flow of air alone through the column provided some vibration.Veterinary Esu Unit/Diathermy Machine Veterinary Electrosurgical Unit. With a suitable correction for gas velocity, the non-6 Rails Galvanized Portable Metal Frame Material Cattle Yard Panels.
Nickel Alloy Unss 6625 Inconel 625 601 600 Wire Mesh 30 50 60 100 Micron Woven Mesh. 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.Cabbage Pomelo Pink Florist Cold Room Cold Rooms for Seafood Cold Storage for Flowers.
Professional Spigot Box Truss Facility for Outdoors Performance. As these measurements do not clearly indicate fluidization conditions,6-200mm Thick Metal Sheet CNC Flame Cutting Machine. 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-Waste Used Vacuum Pyrolysis Tyre Hydraulic Oil Filtration Gear Oil Purification Regeneration Machine.
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Acknowledgments
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References
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