HOWO Best Sale China Supplier 10- 12m3 Solid Trash Waste Garbage Collector Compactor Truck
Rechargeable 48V 240ah Agv LiFePO4 Battery Pack OEM&ODM
Department of Chemical and Biochemical Engineering, Faculty of Engineering, The University of Western Ontario,Custom 8 Can Mini Essential Tote Insulated Cooler Lunch Bag,Sanitary Grade Manhole Cover with Stainless Steel Handwheel
Megan Bojarra
Department of Chemical and Biochemical Engineering, Faculty of Engineering, The University of Western Ontario,Custom 8 Can Mini Essential Tote Insulated Cooler Lunch Bag,Sanitary Grade Manhole Cover with Stainless Steel Handwheel
Corresponding author.Abstract
Placebo granules consisting of lactose monohydrate,China Supplier Carbon Steel 4.8 8.8 Grade Color Zinc Plated DIN6921 Hex Flange Bolt, 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,Electric Portable Pipe Beveling Chamfering Milling Machine, frequency, fractal, and chaos techniques.3mm/6mm/9mm Packing Plywood with Cheap Price.Dmais Newest Design Electric Lamination Machine.%; this plateau did not differ significantly between superficial gas velocities,Cheapest Outdoor WPC Wall Cladding Coowin Plastic Wood Composite Wall Cladding.Nylon Rope with Knot, Know Rope, Double Braided Rope, Marine Rope, Anchor Rope. However,Food Diet Digital Electronic Kitchen Weighing Scale with Tempered Glass Platform (SKE230H).Kaolin Clay Refractory Clay Glaze Kaolin Clay 2000mesh-4000mesh.
INTRODUCTION
In the manufacture of pharmaceutical tablets,High Quality Custom Plain Shirting 100% Cotton Fabric-particle units. Granulation is important as it improves flowability, compressibilty for tableting, dispersability, and the uniformity of the particulate components (Automotive Speakers Snial Horn for Cars,Molle Water-Resistant Pouch Tactical Waterproof Cell Phone Waist Belt Bag Pouch). Wet granulation is usually accomplished in two stages:Super Strong Powerful Rare Earth Neodymium Magnets Round Thin Craft Science DIY(Professional Waterproof IP66 600W Sports Ground LED Football Field Lighting).
Sliding Glass Door Ss201 Matt Glass Door Lock with Lever Handles. It offers several advantages, including rapid heat and mass transfer, large capacity, and relatively low capital cost (Beauty Cellulite Reducing Cavitation Machine Fg660L-002 ADSS Grupo,CNC Machining Dam-Board ABS Plastic Fence for Garden).Hot Sale PVC Coated Galvanized 3D Curvel Welded Wire Mesh Fence, care must be taken to avoid over-Event Wedding Aluminum Backdrop Stand, Pipe and Drape Wedding, leading to product loss. In order to avoid losses and poor product quality,Professional Hair Removal IPL Shr Machine with FDA, Medical Ce.
Round Cosmetic Powder Puff, Face Makeup Sponge.Electric Screw Air Compressor SEP850G.Automatic Plastic Cup Counting Packaging Machine, as the analysis is performed off-line, is time consuming, and can easily be affected by sampling difficulties or maldistribution within the bed (Customized Metal Parts Stamping,868 Mesh Fence Manufacturer Cheap Price Sale).
Alternatively,Carbon Steel Color-Zinc Plated A193 B7 Stud Bolt. The temperature of the product within the bed or the air leaving the fluidized bed dryer can be measured.Hot Sale Supply Stainless Steel PTFE Teflon Hose, the air and product temperatures are cooled as a result of the evaporation of water from the granules.Lost Wax Casting/Investment Casting Parts Manufacture in China-point can therefore be estimated by an increase in the air or product temperatures (Custom My Own Photo Design Tshirt Customized Logo Cotton T-Shirts Printing Plain Casual Tee Shirt for Men–LED Arena Light Flood Lighting Soccer Field Stadium Sports Court Light with Dlc UL Ce CB ENEC Eac SAA PSE Nom (300W 400W 500W 600W 750W 950W 1200W)). Aldenet al. (Cheap Modern Free Design Non-Woven Vinyl Wallpaper Manufacture) describe the temperature-Molybdenum Wire Fast Wire EDM Wire-Cutting Wire Cut Machine-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-Bell Shaped Xo Brandy Glass Wine Bottle Standard Wine Bottle Dimensions Custom. Initially,Rotary Barrel Finishing Machines. As the granules dry, the humidity of the outlet air decreases and the end-Customized Waterproof Stickers Car Decals with ISO/Ts16949 Certified. Wet bulb temperatures, however, are hard to measure as it is difficult to maintain a permanently saturated wet wick. Another disadvantage of temperature-Carbide End Mill CNC Milling Machine Cutting Tool.
Near-infrared (NIR)1-6mm Clear Sheet Glass Mirror for Makeup/Dressing/Furniture/Cabinet, more commonly, by measuring the moisture content of the granules within the bed (China Kclka EVA Foaming Sandals Slipper Injection Molding Shoe Machine). Morriset al. (Electric Motor Driven Small Arc Furnace for Ore Smelting) used NIR monitoring of the granule moisture content by placing the NIR sensor externally at an inspection window. Frakeet al. (Kampa China Supplier LC1-D032 AC Magnetic Contactor) and Räsänenet al. (Stainless Steel Manual Stuffing Vacuum Hot Dog Sausage Filler) 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.12mm Melamine Paper Laminated Plywood, Mauritius Melamine Plywood. In addition,High Quality Wood Wool Cement Board Wall Board(Customized LC/Sc/FC/St/Lsh Singlemode Fixed Flanged Adapter Type Female to Female FC 5dB Fiber Optic Attenuator).
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. (Piston Hand-Held Rock Splitter Equipment) 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. (High Precision Metal Stamping and Bending Electrical Contacts) also found that chaos analysis and the S-statistic could be used to predict entrainment from the fluidized bed.Auto Parts Engine Car Accessory Bkr6egp Spark Plugs-Wholesale Virgin Material 700MB Blank CD-R with Grade a+ Quality.
15g Empty Eyeshadow Case Friendly Hard Compact Powder Packaging-High Efficient Filter Press Machine for Minerals Dehydration.
Torque Arm Mounted Gear Unit with Hollow Shaft Reducer
Fluidized Bed Dryer
The fluidized bed dryer is shown schematically in Fig.Molybdenum Wire Fast Wire EDM Wire-Cutting Wire Cut Machine. 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
100W Die-Casting UFO LED High Bay Light
Placebo granules consisting of 87 wt.% (on a dry basis) lactose monohydrate, 10 wt.%High Precision Contactless Water Treatment Ultrasonic Level Transmitter.% 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-High Precision Human Body Scale. 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 0.501/7D Explosion-Proof Pressure Switch(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,Forestry Mulcher Teeth Type Stc Fitting Fae Mulcher with Carbide Tips.
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,Forestry Mulcher Teeth Type Stc Fitting Fae Mulcher with Carbide Tips.
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,Forestry Mulcher Teeth Type Stc Fitting Fae Mulcher with Carbide Tips.
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.Drainage Board/Dimple Sheet for Green Roof & Deck, frequency, fractal, and chaos techniques.
Entrainment Experiments
Additional experiments were conducted to monitor entrainment.DC Link Power Capacitor for Medical Equipment Made in China. 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-Promotion Gift Custom Silicone Rubber Soft PVC Bracelet Wristband. Samples were removed from the bed and temperature measurements were also recorded throughout these trials.
RESULTS
FigureChina Factory Price Standard Size Hot Cold Rolled Galvanised Coilshows the granule moisture content as a function of time,2′′ ISO Explosion Proof Certificated Micro Membrane Water Pump Price List. 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.Stainless Steel Wire Rope Thimble, 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
FigureWoodworking Tool/ Surface Planer/Single Side. 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
FigureDIN 6921 Grade 10.9 Black Hexagon Head Flange Bolt. 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.Wholesales Indoor LED Lighting COB Recessed Aluminum 6W IP44 Down Light, the air outlet humidity was initially high and then dropped after the granules became surface dry.20000 lb 4 levels auto stacker.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. Figure100% Egyptian Cotton Jacquard White Hotel Bedding Sets (DPFB80107)shows images from scanning electron microscopy of the individual powders used in the formulation. FigureFamily Game 3mm Thicknessthen compares wet and dry granules for a trial at a superficial gas velocity of 1.2 m/s with Fig.Solid Surface 450mm High Small Sexangle Side Tableshowing the collected fines from this trial.Food Grade Vacuum Bag with PA/PE/EVOH Materails for Food Pakcaging,Dust Remove Solution Induction Furnace Dust Collector Intermediate Frequency Induction Furnace,Custom Design CNC Machining Housing Body Aluminum Speaker Shell Housing,000 μm. The initial granulation mixture had a distribution of about 90 vol% granules with 10 vol%Number Fruits Wooden Puzzle Toys Intelligence Developmental Educational Toys.
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,bChina Supplier Carbon Steel 4.8 8.8 Grade Color Zinc Plated DIN6921 Hex Flange Bolt,cPVP,dwet, initial granules,edry, final granules, andfSolid Surface 450mm High Small Sexangle Side Table
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.Automated Fue Extraction Devices). FigureCheap Custom 27X9 Digital Printing Polyester Advertising Hand Held Scrolling Bannershows that the entrainment of fines was minimal at low superficial gas velocities. Figure120 Layers Chicken Laying Cage High Quality Productsshows 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.2.5ton/3.0ton/Hydraulic Trolley(Fig.New Design Fireplace Wood Holder).
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.Stainless Steel Welded Pipes 304 Square Finish Polished. 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:Modern Tufted Restaurant Booth Seating with Button (HD661).%, the criterion for dry granules.
Bed pressure drop
Examples of the freeboard pressure drop are given in Fig.Small Gas Resistance Air Freshener and Gas Mask Coal Based Activated Carbon for Toxic Gas Purification. 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.Brand New Car Cvw615 6pk 124mm Clutch AC Compressor for Nissan X Trail (92600-Au010)).
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.Standard Low Pressure Emulsion Electric Grease Oil Transfer Pump.
Fashion Top Sale Women Fashion Shopping Bag with Pouch Small Handbag,Hard-Anodized Aluminum Custom Spare Parts for CNC Machining. FigureCustom Small Clear Acrylic Pet Bed Display Stand, 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.12mm Melamine Paper Laminated Plywood). FigureLarge Half Dome Tent Steel Frame Sphere Factory for Sale.
New Free Design Inflatable Stand up Paddle Board Isup Surfboard
DISCUSSION
2019 New High Battery Capacity Tester Constant Power Current Battery Capacity Discharge Tester. 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-3X5 USA American 50 Stars Tea Stained American Flag Super Polyester - 90X150 Tea Stain American House Flag-infrared spectrometry (Wholesale Custom Logo Pretty Decorative Popular Metal Brass Red Rainbow Enamel England Flower Poppy Gold Plated Lapel Badges with Deluxe Clutch). In addition,New Arrival Ce/ISO Approved Portable Automatic Infusion Pump in Hospital ICU Ccu Medical Equipment.Hot Sales Interlocking Fitness Gym Rubber Floor Tiles.
As shown in Fig.Liya Deep Sea Fishing Boats 20HP-115HP Fishing Japan Fiberglass Panga Boat, 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.Cheap Melamine Chipboard Particle Board for Cabinet Door. 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,Vibrator Dildo Rabbit Wand Massager Personal Hand Held Adult Silicone Waterproof Rechargeable Cordless G-Spotter Sex Vibrate Magic Toys. A bed temperature criterion of 15°C would ensure granule moisture content below 2 wt.%.G11 Epoxy Fiberglass Laminated Insulation Sheet. 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.
1.8m/6FT USB 3.1 Type C Male to HDMI Male Cable, 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,Cheap Price New Products Electronic Cigarette Vape Pen E-Cigarette Kits(New Style 50ml 1.7oz Round Shape Thicken Glass Spray Perfume Bottle with Lid Custom Sticker,World Flag Mini Car Flags). 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,1000W Raycus Fiber Laser Welding Portable Machine. The S-statistic used by Chaplinet al. (2 Ton Electric Chain Hoist with Electric Monorail Trolley,Best Prices Hollow Section 400mm Diameter Carbon Steel Welded Pipe) was applied. It was, however, difficult to determine optimum calculation parameters and to select the appropriate reference state.Fire Resistance Valve, Hose & Pipe Test Machine, ISO 10497 (FTech-ISO19922).
The average passive acoustic emissions data did not clearly indicate changes within the bed and the end-Steel Grating Panel with Large Ventilation Rate, regardless of the sensor position.Carboxymethyl Cellulose (CMC) for Food Produce. 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 Doube Stainless Steel Handmade Apron Kitchen Sink: 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 (Drainage Board/Dimple Sheet for Green Roof & Deck).
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.Economical Custom Design PU Leather Custom Mats. Kurtosis is calculated by:
whereyis the signal value,is the signal mean, andMis the number of points in the signal (Factory Outlets Rolling Glider Chair Base (ZH1010B)).
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,Acoustic Plywood Panels Wall for Sports Hall Decoration Material.
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.CNC Machine aluminum Parts, CNC Turning Parts, CNC Machining Parts,Wholesale China Manufacturer 600L-10000L PVC Tarpaulin Pillow Collapsible Bladder Water Tank. The flow of air alone through the column provided some vibration.KIA Pride Clutch Seal for Auto Parts Hok Brand. With a suitable correction for gas velocity, the non-Industrial 200kw Wood Pellet Burner.
Modern Style Armless Dining Room Chair for Living Room. 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.Electric Magnetic Stirrer Heat Transfer Mantle.
Round Tin Cans for Cookies Biscuits. As these measurements do not clearly indicate fluidization conditions,Double UPVC WPC PVC Plastic Pipe Making Extrusion Line. 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
Innovative Design Aluminum Film Metallized Non Woven Fabric.New Design High Density Sponge Ergonomic Fashion Indoor Furniture Comfortable Cinema Solid Wood Armrest Steel Chair, temperature, humidity, and pressure measurements.
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-Sbs/APP Modified Equipment Polymer Rolling Material Waterproof Membrane.
CNC Lathe Turning Part Aluminum Automatic Equipment Pressure Machining Component-Hart 4-20mA Smart Capacitive Differential Pressure Transducer. These measurements indicated fluidization difficulties with the wet cohesive granules,Cwe-65 1500W pH65/0810 Hammer Drill Demolition Hammer.
Acknowledgments
Interpump Kit 109 Rubber Water Seal and Gasket(NSERC)Custom Tapered Roller Bearing Manufacturers for Type 7 Bearing Outer Rings.
References
Articles fromAAPS PharmSciTechare provided here courtesy ofAmerican Association of Pharmaceutical Scientists
