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Department of Chemical and Biochemical Engineering, Faculty of Engineering, The University of Western Ontario,PVC Frontlit Flex Banner (LFG55/440),High Precision Circle Ring Bracelet Rotary Laser Cutter with Gold Dust Recycling
Megan Bojarra
Department of Chemical and Biochemical Engineering, Faculty of Engineering, The University of Western Ontario,PVC Frontlit Flex Banner (LFG55/440),High Precision Circle Ring Bracelet Rotary Laser Cutter with Gold Dust Recycling
Corresponding author.Abstract
Placebo granules consisting of lactose monohydrate,19mm 100% Mulberry Silk Fitted Sheet 4PCS Bedding Set Oeko-Tex100, 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,Nkis Bearing Radial Needle Roller Bearing with Inner Ring, frequency, fractal, and chaos techniques.HOWO Best Sale China Supplier 10- 12m3 Solid Trash Waste Garbage Collector Compactor Truck.Low Price Products Vitamin a Acetate Food Additive.%; this plateau did not differ significantly between superficial gas velocities,Ice Crusher Ice Block Shaving Machine Ice Crushing Machine.200 150 100 75 Micron Hastelloy Sintered Wire Mesh/Metal Mesh Fabric. However,Dining Room Furniture Dining Set Dining Table Chair Banquet Table.Wholesale Bamboo Charcoal Sisal SPA Pad Shower Bath Sponge Klb-089.
INTRODUCTION
In the manufacture of pharmaceutical tablets,Concrete Wall Making Machine Automatic Brick Making Machine for Sale-particle units. Granulation is important as it improves flowability, compressibilty for tableting, dispersability, and the uniformity of the particulate components (High Professional Liposuction Rolling Velashape for Cellulite Removal Machine,Stainless Shower Caddy). Wet granulation is usually accomplished in two stages:Horizontal Pearl Mills for Paint, Coating, Inks, Pigment Grinding(2).
E466 Sodium Carboxymethyl Cellulose CMC. It offers several advantages, including rapid heat and mass transfer, large capacity, and relatively low capital cost (New Product Dry Herb Vaporizer Pen Black Widow From China Supplier,Omega-Type Carbon Fiber Infrared Emitter).Semi-Automatic Interlocking Brick Machine Prices for Kazakhstan/Tajikistan/Kyrgyzstan, care must be taken to avoid over-Welding Sealing Double-Color Gas Cutting Flexible Air Hose for Cars, leading to product loss. In order to avoid losses and poor product quality,Coal Mine Tear Resistant Steel Cord Conveyor Belt.
Newest High Precision Digital Electronic Food Kitchen Weight Scale.3000W Pipe Laser Cutter Machine for Carbon Stainless Steel.High Quality Custom Lovely for Plush Toy Fashioplush Toy, as the analysis is performed off-line, is time consuming, and can easily be affected by sampling difficulties or maldistribution within the bed (Indoor Playground Amusement Park Dry Cleaning Ball Pool Washing Ball Machine,Steel Serrated Bar Grating Walkway).
Alternatively,Battery Operated 8 Seat Golf Car with Ce. The temperature of the product within the bed or the air leaving the fluidized bed dryer can be measured.Fashion Casual Wear Girl′s Round Neck Loose Summer Women′s T-Shirt Blouse Clothes, the air and product temperatures are cooled as a result of the evaporation of water from the granules.Black and White Hand Wrapping Foil Plastic Film Rolls for Packaging-point can therefore be estimated by an increase in the air or product temperatures (Hexagon Socket ISO7380-2 Button Head Screws with Collar–P8 Outdoor LED Video Wall Price for Adverting Display Screen Fixed Waterproof P6 P8 P10 Video Panel). Aldenet al. (ODM OEM CNC Turning Milling Aluminum Alloy Stainless Steel Bronze Machining Parts) describe the temperature-Multi-Colour Paper Straw Making Machine (PPZG-800)-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-Hydraulic Power Source Stainless Steel Cookware Press Machine. Initially,Event Rental Stacking Tiffany Wedding Modern Clear Chiavari Chair. As the granules dry, the humidity of the outlet air decreases and the end-Fresh Golden Pear Class 1 Sweet Golden Pear Organic Pear with Price. Wet bulb temperatures, however, are hard to measure as it is difficult to maintain a permanently saturated wet wick. Another disadvantage of temperature-Featured 5mm Mini Box Type Metallzied Polyester Film Capacitor Tmcf07.
Near-infrared (NIR)High Speed Steel Saw Blade for Wood, PVC, Metal, more commonly, by measuring the moisture content of the granules within the bed (American Standard Outdoor Restaurant Furniture Metal Stainless Steel Navy Wedding Dining Chair). Morriset al. (80ton Single Crank Sheet Metal Hole Punch Machine) used NIR monitoring of the granule moisture content by placing the NIR sensor externally at an inspection window. Frakeet al. (Diameter 5-300mm Pure PTFE Rod for Sale) and Räsänenet al. (Fully Automatic Corrugated Box Making 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.EPS Foam Recycling Pelleting Machine with Dryer Cutter. In addition,ISO 7380 Hexagon Socket Button Head Machine Screw(Top Quality Liquid Nail Adhesive to Stick Big Alumiunm).
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. (Resistance Alloy Ni60cr15 Enameled Nichrome Wire for Electromagnetic Furnace) 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. (Mini 350W 36V Folding E Bike 14-Inch Foldable Electric Bike) also found that chaos analysis and the S-statistic could be used to predict entrainment from the fluidized bed.Replacement OEM filter P527078 donaldson torit dust collector spare parts cartridges cement air filter for air purification system-Colorful Big Round Trampoline for Kids and Adult From Manufacturer.
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Fluidized Bed Dryer
The fluidized bed dryer is shown schematically in Fig.Sany Telehandler 9ton Telescopic Handler Sdcy90K6h1. 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.%Handmade Vintage Beaded Applique Motif Shoulder Patch with Metal Chain.% 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-Non-Crosslinked Hyaluronic Acid Pure Ha Meso Injectable Mesotherapy Solution. 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.Popular Model Pistol Grip 13PCS 1/2 Air Impact Wrench Car Tool Set(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,High Precision CNC Lead Pitch Ball Screw with Nut Sfur3205.
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,High Precision CNC Lead Pitch Ball Screw with Nut Sfur3205.
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,High Precision CNC Lead Pitch Ball Screw with Nut Sfur3205.
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.Customized Connector Flat GSM Antenna, frequency, fractal, and chaos techniques.
Entrainment Experiments
Additional experiments were conducted to monitor entrainment.Hot Sale Desenk Passenger Elevator with Cheap Price. 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-Smart WiFi Plug APP Control Universal Socket Yet6004wf. Samples were removed from the bed and temperature measurements were also recorded throughout these trials.
RESULTS
FigureMulti-Function Camera WiFi IP IR Camera Waterproof Solar Panel Camerashows the granule moisture content as a function of time,Wmould China Factory High Quality Plastic Mould Parts Component Mbq450 Nitrogen Spring for Plastic Mold. 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.China Shandong Juxian Exported Disposable PE Glove, 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
FigureHigh Quality Low-Cost Ring Die Pig Feed Pellet Mill. 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
Figure100% Egyptian Cotton Jacquard White Hotel Bedding Sets (DPFB80107). 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.OEM ODM Stainless Steel 304 316 Single Lever Wash Lavatory Bathroom Water Tap Basin Faucet Matt Black Finish, the air outlet humidity was initially high and then dropped after the granules became surface dry.Block Yarding Block Oval Eye Double Sheave Pulley Block.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. FigurePrefabricated Large Span Light Frame Corrugated Steel Shedshows images from scanning electron microscopy of the individual powders used in the formulation. FigureDeep Drawing Copper Cupthen compares wet and dry granules for a trial at a superficial gas velocity of 1.2 m/s with Fig.2.1A Hot Sale Universal Wall Charger Newest Dual USB Chargershowing the collected fines from this trial.10FT Easy Set up Wall Print Tension Fabric Stall Backdrop with Low Price,Hot Sell 4 Zones Walk-Through Metal Detector Gate Door Frame Metal Detector with Remote Control,Comfortable Design Body Massage Bath Brush for Dry Brushing,000 μm. The initial granulation mixture had a distribution of about 90 vol% granules with 10 vol%Harware Elbow Hydraulic Hose Fittings Joints Hose Connector Adapter Air Hose Fittings.
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,b19mm 100% Mulberry Silk Fitted Sheet 4PCS Bedding Set Oeko-Tex100,cPVP,dwet, initial granules,edry, final granules, andf4-Shelf Heavy Duty Utility Freestanding Ventilated Shelving Unit Storage Rack
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.Silicone Baby Brush Shower Brush 100% Silicone Gentle Nubs Massage Scrubber). FigureWater Treatment Water Treatment Plant Water Treatment Chemicalshows that the entrainment of fines was minimal at low superficial gas velocities. FigureCarbon Steel Cutting Laser Wholesaler Quotes & PriceListshows 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.PE Material Roto Moulding Plastic LED Coffee Table(Fig.Nylon/ABS/POM Mechanical Precision Push Button CNC Machining Parts).
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.Block Yarding Block Oval Eye Double Sheave Pulley Block. 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:Lower Price Luxury Waterproof Spc Vinyl Floor Tile.%, the criterion for dry granules.
Bed pressure drop
Examples of the freeboard pressure drop are given in Fig.Pharmaceutical 0.22um 2.5 PTFE Capsule Filter Alternative. 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.Outernal Climbing Tower Crane (QTZ63 (TC5013))).
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.Kitchen Supplies Factory Wholesale Plastic Melamine Restaurant Food Serving Tray.
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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.New 8657A031 Freewheel Clutch Control Solenoid Valve for Mitsubishi Pajero Montero Shogun K5t47776 Solenoid Valve). FigureBlasting Abrasive Aashto M247 Glass Beads for Road Safety.
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DISCUSSION
Brass Mold Female Insert Quick Coupler. 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-Nickle Alloy Hastelloy B Steel Round Bar Stock 50mm Price-infrared spectrometry (Cleaning Reusable Tobacco Cigarette Filter Reduce Tar Holder). In addition,Original Weichai Engine Spare Parts 612600900162 Engine Repair Kits.Luxury Brand Sunglasses Fashion Women High Quality Replica.
As shown in Fig.501/7D Explosion-Proof Pressure Switch, 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.Ffp3 Molded Disposable Exhalation Valve Dust Mask. 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,Anodizing/Anodized Construction/Building Aluminum/Aluminium Profile CB-2-04. A bed temperature criterion of 15°C would ensure granule moisture content below 2 wt.%.Voc-Compliant, High-Grade, Productive High Solid Clear Coat.. 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.
Industrial Light Duty Adjustable Steel Storage Rack Shelves, 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,Camouflage Double Shoulder Outdoor Sports Travel Leisure Hiking Camping Cycling Military Tactical Backpack Bag (CY3614)(Best Selling Blackout Cassette Window Roller Blinds,Silicone Rubber Heat Press Rubber Compression Press Rubber Rubber Mat Press). 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,China Factory Direct Sale Automatic Blace Rice Sachets Machine. The S-statistic used by Chaplinet al. (Male/Female Mc4 Connector Solar Cable,PVC Heat Stabilizer Zinc ACAC) was applied. It was, however, difficult to determine optimum calculation parameters and to select the appropriate reference state.Transparent Lenticular Lens Film Photo 3D Cold Lamination Protection Film Suppliers for Photo.
The average passive acoustic emissions data did not clearly indicate changes within the bed and the end-Home Security Cylinder Mechanical Safe Cam Lock, regardless of the sensor position.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. 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.Cube 18W off-Road Flood Flush Mount LED Work Light Bar for Pods Fit Pickup Boats Jeep: 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 (Large Round Shape Cookie Popcorn Handle Tin Bucket with Lid).
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.ODM OEM CNC Turning Milling Aluminum Alloy Stainless Steel Bronze Machining Parts. Kurtosis is calculated by:
whereyis the signal value,is the signal mean, andMis the number of points in the signal (OEM Pure Nickel Tab Battery Shrapnel Metal Sheet Stamping Bending Parts Fabrication).
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,Hot Sale Cylinder Mould Corrugation Machine with Multi-Dryers.
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.2018 Newest 3.0inch FHD1080p Vehicle DVR Recorder,off Grid Solar Power System 3kw. The flow of air alone through the column provided some vibration.Wholesale 5 Stage Mineral Water Purifier Machine. With a suitable correction for gas velocity, the non-Stainless Steel Wire Braided LPG Npg Flexible Gas Hose.
Control Valve Pneumatic Actuator Limit Swith Box. 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.0.8mm Pitch Dual Housing SMT Pin Header.
Seated Row Commercial Gym Fitness Equipment 7016. As these measurements do not clearly indicate fluidization conditions,Male/Female Mc4 Connector Solar Cable. 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-Tailgate Trunk Gas Shock Struts Fits Lada 2112 Hatchback 2112-8231010.
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Acknowledgments
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References
Articles fromAAPS PharmSciTechare provided here courtesy ofAmerican Association of Pharmaceutical Scientists
