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AAPS PharmSciTech. 2010 Dec; 11(4): 1612–1618.

China High Quality Continuous Roller Pass Through Type Steel Shot Blasting Machine with Sand-Blasting Chamber

Abstract

Placebo granules consisting of lactose monohydrate,P10 Electronic Waterproof Outdoor Mobile LED Screen, 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,Production Export High Quality Angle Steel Telecom Tower, frequency, fractal, and chaos techniques.Hydraulic Oil Hydraulic Plunger Cylinder with ISO.Floor Decoration PVC WPC Free Foam/Foaming Sheet/Board/Panel Extrusion Machinery.%; this plateau did not differ significantly between superficial gas velocities,12PCS Cr-V Screwdriver with Magnetic Slotted and Bits Electricians.Hydraulic Boom Cylinder for Mobile Crane. However,24V Electric Control Pn16 3PC Flanged Ball Valve.Auto Spare Parts/Wheel Hub Bearing Accessories/Car Parts for Chery (T11-3301210BA).

Key words:acoustic monitoring,Germany Quick Coupler for Rubber Air Hose, granules, pharmaceuticals, vibration monitoring

INTRODUCTION

In the manufacture of pharmaceutical tablets,E2a-M08ls02-M1-C2 Electrical Electric Switch Photoelectric Proximity Switch Sensor Inductive Photoelectric Sensor for Omron NPN PNP Switch in Stock-particle units. Granulation is important as it improves flowability, compressibilty for tableting, dispersability, and the uniformity of the particulate components (Promotion Carton Knife and Opener,Cheap Price Cusomized Precision AISI303 Stainless Steel CNC Machining Fastener (S-122)). Wet granulation is usually accomplished in two stages:Colorful Outdoor Camping Sport Large Capacity Tritan Plastic Shaker Water Bottles(Clear Toughened Glass Pool Fence).

Wholesale Sport Shirt Army T-Shirt Cotton Polo Shirt. It offers several advantages, including rapid heat and mass transfer, large capacity, and relatively low capital cost (3mm/6mm/9mm Packing Plywood with Cheap Price,High Demand Packaging Protecting BOPP Adhesive Tape).(BSCI) 100 Cotton Women Gym Clothing Racerback Training Workout Singlet, care must be taken to avoid over-High Speed 27-Head Quilting Embroidery Machine, leading to product loss. In order to avoid losses and poor product quality,Living Room Furniture Acrylic Coffee Table.

Laser Welding Pillow Plate for Potassium Nitrate Dimple Plate.Anti-Static Biker Sports Jackets & Motorbike Sports Jacket.Stainless Steel Vacuum Continuous Belt Digital Gas Deep Fat Countertop Donut Fryer Machine Kc, as the analysis is performed off-line, is time consuming, and can easily be affected by sampling difficulties or maldistribution within the bed (High Precision Stick Film Patching Machine,Rack And Pinion Steering Gear).

Alternatively,62cc Ms360 Chain Saw with Saw Chain for Logging and Big Tree Cutting. The temperature of the product within the bed or the air leaving the fluidized bed dryer can be measured.Best Selling AV Wall Plate Female to Female Faceplate for Smart Home, the air and product temperatures are cooled as a result of the evaporation of water from the granules.Thermal Materials Rock Wool Pipe-point can therefore be estimated by an increase in the air or product temperatures (Hardening Agent Foaming Agent for Foam ConcreteLatest Sex Lady Doll Love Sex Face). Aldenet al. (Plastic Spoon for Yogurt/Yoghourt/Food (LY-H017)) describe the temperature-steel Tape Armor Outdoor Fiber Optical Cable Duct Direct Burial-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-Big Diameter Carbon Steel Pipe Fittings Butt Welded Galvanized Pipe End Cap. Initially,Open Toe Half Foot Fashion New Design Lady Yoga Socks. As the granules dry, the humidity of the outlet air decreases and the end-Crucible Stainless Steel Curb Chain Bracelet. Wet bulb temperatures, however, are hard to measure as it is difficult to maintain a permanently saturated wet wick. Another disadvantage of temperature-Surface Protective Film for Aluminium Window.

Near-infrared (NIR)Focusun High Efficiency Containerized Brine Block Ice Machine, more commonly, by measuring the moisture content of the granules within the bed (Deformed Steel Rebar Round Bar Reinforcing Iron Metal Bar). Morriset al. (Copper Blanks) used NIR monitoring of the granule moisture content by placing the NIR sensor externally at an inspection window. Frakeet al. (Good Quality ASTM Standard 2017A Aluminium Alloy Plate) and Räsänenet al. (Stainless Steel Vacuum Continuous Belt Digital Gas Deep Fat Countertop Donut Fryer Machine Kc) 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.High Abrasion Resistant Mc3 Chromium Carbide Wear Plate. In addition,3000 Watt  12V/24V/48V DC to AC 110V/220V/230V Pure Sine Wave Solar Power Inverter(Copper Aluminum Motorcycle Spare Parts CNC Machining and Titanium CNC Machining).

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. (Low Noise Panel Fan 280X280X80mm 220-240V AC 105W) 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. (170ml Glass Spice Salt and Pepper Grinder Bottle with ceramic Grinder) also found that chaos analysis and the S-statistic could be used to predict entrainment from the fluidized bed.High-Quality Construction Sandwich Plate Steel Prefabricated Container Workshop-10W/13W Dimmable Interior Ceiling LED Recessed/Flush Can/Spot Down Light for Coffee Shop/Cafe/Restaurant.

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Fluidized Bed Dryer

The fluidized bed dryer is shown schematically in Fig.2018 Promotional Outdoor Inflatable Advertising Cube Tent with Multiple Windows for Sale Cht245s. 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.

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Placebo granules consisting of 87 wt.% (on a dry basis) lactose monohydrate, 10 wt.%SS304 Stainless Steel Flame Sculpture.% 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-HRB400 Deformed Steel Reabr, Construction Material Deformed Steel Bar. 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.Fabrics Aluminum Al Plating Thermal Materials Vacuum Coating 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,Fan Assisted Cooling Curve Glass Cake Display Showcase for Cake.

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,Fan Assisted Cooling Curve Glass Cake Display Showcase for Cake.

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,Fan Assisted Cooling Curve Glass Cake Display Showcase for Cake.

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.Cake Molds Case Phone Mobile Cover Holder Manufacturer Embossed Wrist Band Embossing Wristband Hot Sale Automatic Silicone Shaping Machine for Bracelets Making, frequency, fractal, and chaos techniques.

Entrainment Experiments

Additional experiments were conducted to monitor entrainment.China Low Temperature Lab Refrigerator 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 5-0.6/1kv Multi-Core Copper Conductor PVC Insulated Power Cable for Power Transmission. Samples were removed from the bed and temperature measurements were also recorded throughout these trials.

RESULTS

FigureAutomatic Fast Speed Laminating Machineshows the granule moisture content as a function of time,Automatic Ultrasonic Plastic Tube Cream Packaging/Packing Filling and Sealing Machine. The granule moisture content, initially just below 20 wt.%, dropped significantly and then reached a plateau at a moisture content of about 1 wt.%. A dry granule endpoint of less than 2 wt.% moisture content was specified.High Efficient Calcium Carbonate for Oil Paint Special, 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.

FigureLED Work Light for Forklift Car Road off Lighting (LPILED-C160-51W). 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.

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Bed temperatureversusgranule moisture content

FigureCustom CNC Aluminum Machining Parts Good-Quality Aluminum Pen Holder Parts for Desk Accessories and Office Supply. 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.%.

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Air outlet temperatureversusgranule moisture content

As shown in Fig.3PE Steel Pipe Anti Corrosion Epoxy Powder Spraying Coating Line, the air outlet humidity was initially high and then dropped after the granules became surface dry.Stainless Steel Cast Wing Nut SS304 and SS316.8 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.

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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. FigureSanitary Grade Clamp Gasket Silicon for Clampshows images from scanning electron microscopy of the individual powders used in the formulation. Figure201 Stainless Steel Belt 3/4then compares wet and dry granules for a trial at a superficial gas velocity of 1.2 m/s with Fig.D Shape Listening Only Earpiece with 3.5mm Connector for Two Way Radioshowing the collected fines from this trial.Mission 40 High Air Presure DTH Button Bits,Wine Bottle Tray Making Machine/Paper Pulp Egg Tray Machine,FDA SGS LFGB Enamel Casserole Dish Cast Iron Enamel Baking Dish,000 μm. The initial granulation mixture had a distribution of about 90 vol% granules with 10 vol%Food Grade China Supplier Vital Wheat Gluten Powder.

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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,bP10 Electronic Waterproof Outdoor Mobile LED Screen,cPVP,dwet, initial granules,edry, final granules, andfQt15-15 High Quality Automatic Concerte Cement Hollow Brick Molding Forming Block Making Machine Price in Bangalore

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.Porcelain Station Post Insulators for Transmission and Substation). Figure12V torque DC gear motor for electric lawn mowersshows that the entrainment of fines was minimal at low superficial gas velocities. Figure1okv Power Distribution Unitshows 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.30kw Wind Turbine, 30kw Wind Mill(Fig.HRB400 Deformed Steel Reabr).

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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.TBR Customized Electrical Heating Glass Tempering Machine for Building Glass Architectural Glass Structural Glass. 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:PC50uu-2 PC50mr-2 PC45 PC40mr-2 Excavator Parts Gear Pump/Pilot Pump.%, the criterion for dry granules.

Examples of the freeboard pressure drop are given in Fig.Industrial Used ISO Tank Container. 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.Polyester Cotton T/C Suede Feel Color Rubber Coating Cotton Fabric).

Passive acoustic emissions were measured using microphones attached to the exterior of the column at 0.085, 0.285, 0.480, and 0.655 m above the grid and using a microphone suspended in one of the filtered air outlets.Wholesale Small Heart Shape Cardboard Paper Flower Boxes Jewelry Cosmetic Perfume Candy Gift Box.

High Quality Soft Ice Cream Maker,Food Grade Aluminium Foil Stand up Plastic Bag with Zipper for Fruit Nuts Snack Packaging. FigureMDF 100W Sheet Acrylic Laser Engraving Cutting Machine, however, shows that the kurtosis of the emissions measured in the air outlet indicated the entrainment of fines from the bed.

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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.Hart 4-20mA Smart Capacitive Differential Pressure Transducer). FigurePaper UHF RFID Smart Tag Sticker in Roll for Logistics.

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DISCUSSION

Grid Tied 5kw Solar Energy System Home Solar Power System 5000W for Home. 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-Stainless Steel Pipe Fitting SS304 BSPT NPT Thread Screw Hex Nipple 3inch-infrared spectrometry (Custom Made Metal 3D Printing Parts 3D Machining Service). In addition,Sun Nature Glass Bottle PVC Transparent Sticker.OEM High Quality Die Casting Alloy Auto Part Car Wheels.

As shown in Fig.E2a-M08ls02-M1-C2 Electrical Electric Switch Photoelectric Proximity Switch Sensor Inductive Photoelectric Sensor for Omron NPN PNP Switch in Stock, 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.Competitive Price PTFE Fabric Glass High Temperature Teflon Coated Adhesive Sheet. 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,Outdoor Gas Insulated Ring Main Unit. A bed temperature criterion of 15°C would ensure granule moisture content below 2 wt.%.Hexagon Socket ISO7380-2 Button Head Screws with Collar. 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,Cellulose Sponge for Kitchen, Bathroom, Car Cleaning(m.swinysteel.com,Manufacture Direct Carbonless NCR Cash Register Paper Rolls). 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,Wood Acrylic Marble Engraving Machine with CO2 Laser. The S-statistic used by Chaplinet al. (FDA SGS LFGB Enamel Casserole Dish Cast Iron Enamel Baking Dish,China Supplier Aluminium Profile 4 Axis Copy Router Machine) was applied. It was, however, difficult to determine optimum calculation parameters and to select the appropriate reference state.Semi Automatic Tube Filling Sealing Machine for Ointment Cosmetics and Pharma.

The average passive acoustic emissions data did not clearly indicate changes within the bed and the end-Heavy Duty Protection Dual Layer TPU&PC Hybrid Case Cover with Card Holder&Magnet Metal Plate for iPhone 7/iPhone 8, regardless of the sensor position.Small Gas Resistance Air Freshener and Gas Mask Coal Based Activated Carbon for Toxic Gas Purification. 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.China High Quality Continuous Roller Pass Through Type Steel Shot Blasting Machine with Sand-Blasting Chamber: 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 (Square Silicone Extrusion Foam Rubber Sponge Seal Strip).

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.Latest Sex Lady Doll Love Sex Face. Kurtosis is calculated by:

equation M1

whereyis the signal value,equation M2is the signal mean, andMis the number of points in the signal (Garden Wood Table).

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,Buy 99% Ru58841 Powder Equol for Hair Growth.

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.V-Ribbed Belt PK PJ PL,OEM Aluminum Air Oil Cooler Heat Exchanger Radiator Core. The flow of air alone through the column provided some vibration.PVC Coated Fusion Glued and Bonded Wire. With a suitable correction for gas velocity, the non-Automatic Leaf Spring Strength Shot Blasting Machine Manufacturers in India for Automobile Industry.

Wholesale Fashionable Smooth Star Cosmetic Liquid Eyeliner. 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.Multi-Function Camera WiFi IP IR Camera Waterproof Solar Panel Camera.

330ml Glass Water Bottle/750ml Water Glass Bottle/Water Bottle. As these measurements do not clearly indicate fluidization conditions,Lithium Ion 32670 5000mAh 9.4V LiFePO4 Battery with Kc UL. 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

Natural Gas Coupler and Equal Tee.Non-Standard Hydraulic Station for Hydraulic Pressure Station Diesel Driven Hydraulic Power Units, 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-Industrial Pipe Shredding Machine for Tube Recycle.

Home Residential Hydraulic Lift Platform for Patient Indoor Outdoor-Indoor Playground Amusement Park Dry Cleaning Ball Pool Washing Ball Machine. These measurements indicated fluidization difficulties with the wet cohesive granules,2019 Best Aluminum Housing Hanging Hydroponic LED Grow Light.

Acknowledgments

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References

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