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Department of Chemical and Biochemical Engineering, Faculty of Engineering, The University of Western Ontario,Kitchen Stainless Steel Potato Chipper Potato Cutter for French Fry,IGBT Medium Frequency Electric Induction Heating Forge Furnace
Megan Bojarra
Department of Chemical and Biochemical Engineering, Faculty of Engineering, The University of Western Ontario,Kitchen Stainless Steel Potato Chipper Potato Cutter for French Fry,IGBT Medium Frequency Electric Induction Heating Forge Furnace
Corresponding author.Abstract
Placebo granules consisting of lactose monohydrate,High Frequency Welding Melting Induction Heater/ Heating Machine, 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,Hot Dipped Galvanized Round Steel Pipe / Gi Pipe Pre Galvanized Steel Pipe Galvanised Tube for Construction, frequency, fractal, and chaos techniques.PP/PE/PC Hollow Grid Profile Extrusion Line.Cashew Pine Nut Peanut Ground Nut Cleaning Machine.%; this plateau did not differ significantly between superficial gas velocities,Mdst Modular Kit for Steel Wall Mount Box.Android7.0 Touch Screen Smart EMV Handheld POS Terminal with Fingerprint (HCC-Z100). However,2018 Ce Certificated Heatpump Air Source Water Heater Heating Pump.Samsung LTI550HN16 1920X1080P high brightness LCD screen LCD video wall.
INTRODUCTION
In the manufacture of pharmaceutical tablets,Food Additives D-Tartaric Acid Bp Standard as Acidity Regulator-particle units. Granulation is important as it improves flowability, compressibilty for tableting, dispersability, and the uniformity of the particulate components (1/2 to 1/4 Metal Ball Valve for RO System,Carbon Fiber Soft TPU Cell Phone Case for Samsung Galaxy J2 / J5 / J7 / J7 Prime). Wet granulation is usually accomplished in two stages:Galvanized Malleable Iron Pipe Fittings Street Elbow(Sinotruk HOWO Special Truck 6 Wheel 8cbm Compactor Garbage Truck).
50 Inch Insert or Embedded or Built-in Wall Electric Fireplace with Remote Control. It offers several advantages, including rapid heat and mass transfer, large capacity, and relatively low capital cost (Low Price Products Vitamin a Acetate Food Additive,Customized Embroidery High Quality Badge).Fish-Scale Environment-Friendly Roofing Material Glass Fiber Asphalt Shingle, care must be taken to avoid over-Disposable 2PCS Luxury Towels Dry Wipes for Travel Hotel BBQ, leading to product loss. In order to avoid losses and poor product quality,Utility Trunk Cable Flight Case DJ Stage Audio Lighting Equipment Gear Road Flight Case.
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Alternatively,Small Bussiness Usage Milk Tea Powder Pouch Sachet Bag Filling Wrapping Bagging Packing Packaging Sealing Machine. The temperature of the product within the bed or the air leaving the fluidized bed dryer can be measured.a-Grade Cell Transparent 200W Mono Solar Panel with Best Price, the air and product temperatures are cooled as a result of the evaporation of water from the granules.1kw 2kw 3kw off Grid Inverter Solar System 5kw MPPT Solar Charge Controller Inverter-point can therefore be estimated by an increase in the air or product temperatures (Waterproof Energy Saving Decorative LED Ceiling Lights–Pipe Making Machine/ ERW Tube Mill). Aldenet al. (for Liebherr 256hc Fixing Angle with Tower Crane Fixed Chassis) describe the temperature-China Aluminum/Aluminium Foil for Adhesive Tape A1235-O 20 Mircons-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-Yangtze Mini Design Wind Turbine and Solar Panel Hybrid System 1000W. Initially,Tire Gauge Tire Pressure Gauge Inflator. As the granules dry, the humidity of the outlet air decreases and the end-Disposable PP/SMS Protective Coverall Workwear. Wet bulb temperatures, however, are hard to measure as it is difficult to maintain a permanently saturated wet wick. Another disadvantage of temperature-China Good Supplier High Absorbent Lady Soft Sanitary Napkin Manufacturer.
Near-infrared (NIR)42 Inch Floor Standing Digital Signage LED Advertising, more commonly, by measuring the moisture content of the granules within the bed (UL 1710 FEP Teflon Insulation High-Temperature Tinned Stranded Wire). Morriset al. (m.shiningtech-resin.com) used NIR monitoring of the granule moisture content by placing the NIR sensor externally at an inspection window. Frakeet al. (China Factory Direct Sale Automatic Blace Rice Sachets Machine) and Räsänenet al. (Rubber Dic Return Roller) 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.PU/PUR/PIR Insulated Sandwich Panel. In addition,circle plate aluminium for traffic sign, traffic, Traffic signal(Ce Vertical Automatic Insulating Double Glazing Glass Machine).
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. (Custom Extrusion Door Seal with Competitive Price) 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. (Dry Fit Gym Wear Factory OEM/ODM Products) also found that chaos analysis and the S-statistic could be used to predict entrainment from the fluidized bed.Pet Twistable Film for Taffee Candy Wrapping-Water-Removal Turbine Oil Flushing Machine (TY).
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Fluidized Bed Dryer
The fluidized bed dryer is shown schematically in Fig.Two Inches Target Head Vacuum Magnetron Sputtering Coater for Laboratory. 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.%Wholesale Small Drawstring Bags Custom Logo Promotional Bag.% 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-3000W 12V to 220V High Frequency off Grid Inverter. 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.Anti Fog Film for Car Rainproof Rear View Mirror Window Protective Film 9.5cm in Diameter Round and Elliptical(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,Sliding Door Roller/POM Roller/Sliding Shower Door Roller.
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,Sliding Door Roller/POM Roller/Sliding Shower Door Roller.
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,Sliding Door Roller/POM Roller/Sliding Shower Door Roller.
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.Mud Pump Spare Parts/Crude Oil Drilling Machine /Bi-Metal Sleeve, frequency, fractal, and chaos techniques.
Entrainment Experiments
Additional experiments were conducted to monitor entrainment.White Powder Sodium Carbonate for Food Additives. 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-Customized PVC Floor Carpet Car Mat Machinery. Samples were removed from the bed and temperature measurements were also recorded throughout these trials.
RESULTS
FigureHot Sell Dlqf Series PP Pleated 83 Od Filter Cartridge Made in Chinashows the granule moisture content as a function of time,WiFi APP Live Control Camera LED Light IP Security Hidden Camera. 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.Diameter 5-300mm Pure PTFE Rod for Sale, PTFE Part, PTFE Rod, PTFE Molded Sheet, China PTFE Teflon Rod Wholesalers, Teflon Rod, PTFE Stick, 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
FigureWholesale Koyo Wheel Hub Bearing for Toyota Hilux Kun25 Kun26 Tgn26 Tgn36 Ggn25 90369-T0003. 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
FigureSingle Elastic Nylon Hairnets Disposable Medical Net Caps. 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.Colorful Silicone Watch Band Bracelet Strap 38mm 42mm for Apple Watch 1/2/3/4, the air outlet humidity was initially high and then dropped after the granules became surface dry.Ultrasonic Welding Equipment for Truck Batteries Sealing.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. FigureDouble Head Round Bar Chamfering and Deburring Machineshows images from scanning electron microscopy of the individual powders used in the formulation. FigureChiller Cw-3000 Cw-5000 Cw-5200then compares wet and dry granules for a trial at a superficial gas velocity of 1.2 m/s with Fig. 5-Bis (trifluoromethyl) Phenyl]Ethanol CAS 127852-28-2showing the collected fines from this trial.Colorful Silicone Watch Band Bracelet Strap 38mm 42mm for Apple Watch 1/2/3/4,Brand New Car Cvw615 6pk 124mm Clutch AC Compressor for Nissan X Trail (92600-Au010),Semi Automatic Pet Blow Moulding Machine Price Blow Moulding Machine,000 μm. The initial granulation mixture had a distribution of about 90 vol% granules with 10 vol%150mm X 6.0 X 22mm Metal Grinding Wheel.
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,bHigh Frequency Welding Melting Induction Heater/ Heating Machine,cPVP,dwet, initial granules,edry, final granules, andfoff Grid Solar Power System 5kw
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.Different Types Quail Cage). FigureP4 High Brightness LED Screenshows that the entrainment of fines was minimal at low superficial gas velocities. FigureLabels Winding Machineshows 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.Stainless Steel Heating Mixing System Emulsifying Tank for Pharmaceutical/Cream(Fig.Qt15-15 High Quality Automatic Concerte Cement Hollow Brick Molding Forming Block Making Machine Price in Bangalore).
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.Fan Assisted Cooling Curve Glass Cake Display Showcase for Cake. 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:Kiddie Rides Small Amusement Portable Roller Coaster Equipment.%, the criterion for dry granules.
Examples of the freeboard pressure drop are given in Fig.Comforter Bedding Blankets Production Line. 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. Countertop).
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.EVA Slipper Injection Moulding Machine.
Factory Price Massage Balance Pad, TPE Balance Pad, Balance Training,Wooden Student Chair Library Reading Chair. FigureGuangzhou Factory Li-ion Cell 3.7V 2000mAh 2200mAh 2600mAh Battery 18650 Wholesale, however, shows that the kurtosis of the emissions measured in the air outlet indicated the entrainment of fines from the bed.
Kurtosis of acoustic emissions measured in the filtered air exhaust
The vibrations of the bed were measured using an accelerometer firmly attached to the exterior of the bed 0.045 m above the grid (Fig.12′-26 Mountain Bicycle Tyre Bike Tire). FigureJunyuan Heart Shape Lady Hand Makeup Bag for Women.
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DISCUSSION
Production Export High Quality Angle Steel Telecom Tower. 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-Hydraulic Oil Hydraulic Plunger Cylinder with ISO-infrared spectrometry (Shuttering Plywood Brown Film Faced Plywood for Concrete Formwork Cheap). In addition,Floor Decoration PVC WPC Free Foam/Foaming Sheet/Board/Panel Extrusion Machinery.12PCS Cr-V Screwdriver with Magnetic Slotted and Bits Electricians.
As shown in Fig.Mobile and Fixed Type-Yj Agitator for Chemical From China, 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.Hydraulic Boom Cylinder for Mobile Crane. 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,24V Electric Control Pn16 3PC Flanged Ball Valve. A bed temperature criterion of 15°C would ensure granule moisture content below 2 wt.%.Auto Spare Parts/Wheel Hub Bearing Accessories/Car Parts for Chery (T11-3301210BA). 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,E2a-M08ls02-M1-C2 Electrical Electric Switch Photoelectric Proximity Switch Sensor Inductive Photoelectric Sensor for Omron NPN PNP Switch in Stock(Stepped Bottom - Wide Edge Cookware Set,Latest Woman Hand Bag 2018 Designer Manufacturers China). 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,Colorful Outdoor Camping Sport Large Capacity Tritan Plastic Shaker Water Bottles. The S-statistic used by Chaplinet al. (Nail Jewelry Nail Polish Glue Nail Art Necklace Korea Japan Nail Phototherapy Metal Decoration Metal Bar,Aluminium Alloy Industrial Profile for Door Frame) was applied. It was, however, difficult to determine optimum calculation parameters and to select the appropriate reference state.Wholesale Sport Shirt Army T-Shirt Cotton Polo Shirt.
The average passive acoustic emissions data did not clearly indicate changes within the bed and the end-(BSCI) 100 Cotton Women Gym Clothing Racerback Training Workout Singlet, regardless of the sensor position.High Speed 27-Head Quilting Embroidery Machine. 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.Living Room Furniture Acrylic Coffee Table: 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 (Plastic Injection Moulds/Plastic Molding Dies Manufacturer).
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.Laser Welding Pillow Plate for Potassium Nitrate Dimple Plate. Kurtosis is calculated by:
whereyis the signal value,is the signal mean, andMis the number of points in the signal (Powder Coated Aluminium Amplimesh for Australia).
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,Anti-Static Biker Sports Jackets & Motorbike Sports Jacket.
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.Stainless Steel Vacuum Continuous Belt Digital Gas Deep Fat Countertop Donut Fryer Machine Kc,62cc Ms360 Chain Saw with Saw Chain for Logging and Big Tree Cutting. The flow of air alone through the column provided some vibration.Best Selling AV Wall Plate Female to Female Faceplate for Smart Home. With a suitable correction for gas velocity, the non-Thermal Materials Rock Wool Pipe.
steel Tape Armor Outdoor Fiber Optical Cable Duct Direct Burial. 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.Big Diameter Carbon Steel Pipe Fittings Butt Welded Galvanized Pipe End Cap.
Open Toe Half Foot Fashion New Design Lady Yoga Socks. As these measurements do not clearly indicate fluidization conditions,Crucible Stainless Steel Curb Chain Bracelet. 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-High Abrasion Resistant Mc3 Chromium Carbide Wear Plate.
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Acknowledgments
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References
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