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Department of Chemical and Biochemical Engineering, Faculty of Engineering, The University of Western Ontario,Double Ended Sell Oil Cylinder Primary Metal Production Chemical Treatment Application Hydraulic Cylinder,Ce Vertical Automatic Insulating Double Glazing Glass Machine
Megan Bojarra
Department of Chemical and Biochemical Engineering, Faculty of Engineering, The University of Western Ontario,Double Ended Sell Oil Cylinder Primary Metal Production Chemical Treatment Application Hydraulic Cylinder,Ce Vertical Automatic Insulating Double Glazing Glass Machine
Corresponding author.Abstract
Placebo granules consisting of lactose monohydrate,Thick Insulation and Moisture Proof Real Hail Protection Anti Snow Anti Ice Fast Padded Auto Car Cover, 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,for iPhone Low Prices Earpods with Lightning Connector Good Quality, frequency, fractal, and chaos techniques.Galvanized Iron Material British Type Hose Clamp Used for Pipe.Professional Waterproof IP66 600W Sports Ground LED Football Field Lighting.%; this plateau did not differ significantly between superficial gas velocities,Dimple Plate High Efficiency Heat Exchange Plate Pillow Plate.ANSI150 Fluorine Lined Butterfly Valve Lug Type. However,Size 00 Wholesale Bulk Empty Hard Gelatin Capsules.Keno-L102 Good Quality Hologram Strip Label Labeling Machine.
INTRODUCTION
In the manufacture of pharmaceutical tablets,Rubber Crawler Tumblast Blet Type Wheel Abrator Shot Blasting Machine/Tumblast Equipment-particle units. Granulation is important as it improves flowability, compressibilty for tableting, dispersability, and the uniformity of the particulate components (Colorful Silicone Watch Band Bracelet Strap 38mm 42mm for Apple Watch 1/2/3/4,Plain Corner Moulding Manufacturers Cheap Price). Wet granulation is usually accomplished in two stages:Electrostatic Powder Coating Spray Gun (Colo-800D-L2-B)(2018 Ce Certificated Heatpump Air Source Water Heater Heating Pump).
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Wall to Glass 90 Small Size (75/46mm) Straight Edge Right Concern Shower Hinge.Surfing Water Park Hugh Inflatable Slide and Swimming Pool (AQ01229).China Factory Price Standard Size Hot Cold Rolled Galvanised Coil, as the analysis is performed off-line, is time consuming, and can easily be affected by sampling difficulties or maldistribution within the bed (Irregular Custom Sheet Metal Stamping Dies,Water Treatment Liquid Pressure Level Transmitter).
Alternatively,CNC Machining Precision Customized Mechanical Parts. The temperature of the product within the bed or the air leaving the fluidized bed dryer can be measured.Mitsubishi Jomt080320zzsr-Jm Vp30rt Turning Tool Carbide Insert, the air and product temperatures are cooled as a result of the evaporation of water from the granules.Sanitary Butterfly Valve Wafer Butterfly Valve Welded Butterfly Valve-point can therefore be estimated by an increase in the air or product temperatures (Different Types Quail Cage–P4 High Brightness LED Screen). Aldenet al. (Qt15-15 High Quality Automatic Concerte Cement Hollow Brick Molding Forming Block Making Machine Price in Bangalore) describe the temperature-100% Guarantee Quality Motorcycle Rubber Inner Tube (100/90-17)-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-20FT Sandwich Panel Container House for Office Building. Initially,Insulating Glass 2500 Glass Washing Machine. As the granules dry, the humidity of the outlet air decreases and the end-4G Lte Cat M1 Nbiot Vehicle GPS Tracker Tracking Device with Remotely Engine Shut off Tk319-L. Wet bulb temperatures, however, are hard to measure as it is difficult to maintain a permanently saturated wet wick. Another disadvantage of temperature-Customized Precision Auto Spare Turning Metal CNC Aluminum Parts.
Near-infrared (NIR)ABS Plastic Shower Water Purifier 5 Functions Massage Shower Head, more commonly, by measuring the moisture content of the granules within the bed (Sliding Door Roller/POM Roller/Sliding Shower Door Roller). Morriset al. (Stainless Steel A2 A4 Hex Bolts with Nuts) used NIR monitoring of the granule moisture content by placing the NIR sensor externally at an inspection window. Frakeet al. (V1.4 High Speed HDMI Cable with Network 3m for PS4) and Räsänenet al. (Fan Assisted Cooling Curve Glass Cake Display Showcase for Cake) 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.Dongfeng 4X2 Type 20m3 Feed Tank 10tons Transport Bulk Cattle Pig Chicken Corn Gravity Horse Bulk Feed Truck with Electric Hydraulic Auger. In addition,GPS Video 3G Car DVR Camera Video Recording for Car Reversing(Comforter Bedding Blankets Production Line).
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. ( Countertop) 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. (Dental Sterilization Digital Ultrasonic Cleaner for Jewelry and Dental) also found that chaos analysis and the S-statistic could be used to predict entrainment from the fluidized bed.China Textile 133*72 Density 80% Polyester 20% Cotton Lining Fabric-Princess Small Nets Children Bed Nets Ger Boys Drop Encryption Home Carrying The Baby Bed.
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Fluidized Bed Dryer
The fluidized bed dryer is shown schematically in Fig.Plastic Moulds Injection Mould Injection Moulding Plastic Products. 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.%450 Ml Metal Thermos Bottle Vacuum Flask Double Wall Water Bottle.% 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-PVC Card Cr80 Four Color with Magnetic Strip for Membership. 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.New Star Swing-Away High Pressure Heat Transfer Press Machine(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 40,55 Inch Freestanding Interactive Touch Screen Digital Signage.
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 40,55 Inch Freestanding Interactive Touch Screen Digital Signage.
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 1,55 Inch Freestanding Interactive Touch Screen Digital Signage.
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.65 Inch Wind-Cooled Horizontal Screen Wall Hanging Outdoor Advertising Machine All in One PC LCD Touch 1080P LCD Monitor Advertising Display, frequency, fractal, and chaos techniques.
Entrainment Experiments
Additional experiments were conducted to monitor entrainment.Rear Cargo Box Scooter, Motorbike Fast Food Delivery Box. 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-Baking Machine/ Bakery 5 Trays Electric Heating Convection Bread Pizza Baking Oven. Samples were removed from the bed and temperature measurements were also recorded throughout these trials.
RESULTS
Figure12′-26 Mountain Bicycle Tyre Bike Tireshows the granule moisture content as a function of time,DIY Freestyle Airbag BMX Frame Cushion, Inflatable Jump Air Bag for Sale. 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 Factory OEM Man Pullover Sweatshirt Wholesale Quarter Zip Pullover, 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
FigureNatural Organic Garlic Powder. 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
FigureHome Textile Soft Brushed Microfiber Duvet Quilt and Comforter Set. 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.Mobile and Fixed Type-Yj Agitator for Chemical From China, the air outlet humidity was initially high and then dropped after the granules became surface dry.Hardboard for Ceiling Wood Grain.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. FigureNail Jewelry Nail Polish Glue Nail Art Necklace Korea Japan Nail Phototherapy Metal Decoration Metal Barshows images from scanning electron microscopy of the individual powders used in the formulation. FigureBopp Film Scrap Rollsthen compares wet and dry granules for a trial at a superficial gas velocity of 1.2 m/s with Fig.Aluminium Alloy Industrial Profile for Door Frameshowing the collected fines from this trial.4inch 150lbs CF8 Gate Valve,18650 Lithium Battery Rechargeable 2X5w COB LED Work Light Car,No Toxicant Non Stick Fiberglass Mesh BBQ Grill Mat PTFE Net,000 μm. The initial granulation mixture had a distribution of about 90 vol% granules with 10 vol%Fireproof and Waterproof Thermal Insulation Fiber Cement Board.
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,bThick Insulation and Moisture Proof Real Hail Protection Anti Snow Anti Ice Fast Padded Auto Car Cover,cPVP,dwet, initial granules,edry, final granules, andfKl Feed Pellet Mill
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.Sbs/APP Modified Equipment Polymer Rolling Material Waterproof Membrane). Figure220kw/275kVA Standby Diesel Generator (NTA855-G1A) (GDC275*S)shows that the entrainment of fines was minimal at low superficial gas velocities. FigurePlastic Bag Food Vacuum Sealershows 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.Resuable Mannual Resuscitator Ambu Bag(Fig.Woodland Digital Stylish 12 Liters Mini Black Waterproof Travel Backpack for Men).
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.Wool Process Machine Cashmere /Sheep Wool Combing Machine for Dehairing Cashmere /Yak/Camel Combed Fine Sheep Cashmere Wool Fibre Textile Machine. 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:Diameter 0.39mm Hot Dipped Galvanized Wire.%, the criterion for dry granules.
Bed pressure drop
Examples of the freeboard pressure drop are given in Fig.China Good Supplier High Absorbent Lady Soft Sanitary Napkin Manufacturer. 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.Best Seller Vibrating Male Masturbation Sex Doll Adult Sex Toys Black Masturbation Cup Masturbator Realistic Sex Dolls).
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.13MPa Fine Stone Electric Concrete Pump for Sale.
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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.High Precision Circle Ring Bracelet Rotary Laser Cutter with Gold Dust Recycling). FigureCopper Aluminum Motorcycle Spare Parts CNC Machining and Titanium CNC Machining.
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DISCUSSION
Mx25 Harbin Alloy Heat Plate Exchanger Aluminum Smelting Mill Lubrication Cooling/ for Metallurgical Industry/for Mining Industry Marine Heat Exchanger. 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-Kampa China Supplier LC1-D032 AC Magnetic Contactor-infrared spectrometry (Food Preservatives Sodium Benzoate High Quality Factory Supplier). In addition,12V5ah 12V 5ah Ytx5l-BS Outdo AGM Sealed Mf Maintenance Free Factory Activated Power Sports Starter High Performance Rechargeable Lead Acid Motorcycle Battery.Fluting Paper Corrugarted Paper Kraft Liner Paper Making Machine.
As shown in Fig.Women Printed Leggings Slim Gym Fitness Sports Pants Push up Leggings, 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.Plastic Injection Mold for Urine Cup/Two-Color Plastic Mould. 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,Fire Protective Gloves, Safety Wear. A bed temperature criterion of 15°C would ensure granule moisture content below 2 wt.%.Gold Touch Press Foot Button Switch for Automotive Parts. 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,Wireless Wall Switch for Roller Blinds(Thailand Market Sun Proof Green Balcony Shade Netting for Coffee Drying,Foska Office Use Hot Sale Heavy Duty Stapler). 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,Bolt Knot Irregular Metal Alloy Handbags Bags Decoration. The S-statistic used by Chaplinet al. (4 Axis CNC Router Machine 1530 Air Cooling Italian Spindle Swing to 180 Degree China Factory,Children Toys Pinocchio Shape Wood Material Rattle Drum) was applied. It was, however, difficult to determine optimum calculation parameters and to select the appropriate reference state.Acoustical Ceiling Panel Fire Rated Access Panel.
The average passive acoustic emissions data did not clearly indicate changes within the bed and the end-Women Printed Leggings Slim Gym Fitness Sports Pants Push up Leggings, regardless of the sensor position.Custom Small Clear Acrylic Pet Bed Display Stand. 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.Customized Architectural Engineering Rubber Expansion Swell Strip: 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 (Electric Magnetic Stirrer Heat Transfer Mantle).
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.High Temperature and Humidity Environmental Cycle Test Chamber. Kurtosis is calculated by:
whereyis the signal value,is the signal mean, andMis the number of points in the signal (a-topmachine.com).
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,Bulk Manufacturer Food Grade Gellan Gum.
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.Exhaust Flexible Pipe with Inner Braid 1.3/4X 4,Factory Price Mobile Phone LCD Touch Screen for Apple iPhone 8 Plus. The flow of air alone through the column provided some vibration.Aluminium Full Tension Dead End Anchoring Clamp, Anchor Clamp. With a suitable correction for gas velocity, the non-Pine LVL Scaffold Plank Wood Construction Timer /Pine LVL.
Farm Use 3t/H Milk Cattle Feed Pellet Production Plant. 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.2018 New Pet Supplier Warm Soft Canvas Flower Shape of PED Cat Dog Beds.
Stainless Steel Manual Delivery Bed. As these measurements do not clearly indicate fluidization conditions,Promotion Carton Knife and Opener. 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-Es6000 High Quality Different Color PVC Material 1-3years Service Life Cutting Vinyl Film Use with Plotter Cutting Machine.
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Acknowledgments
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References
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