The document discusses fluidized bed dryers. It explains that fluidized bed dryers use hot air or gas to fluidize solid particles, allowing for rapid and uniform drying. There are two main types - batch and continuous. Batch dryers allow control of residence time for uniform drying, while continuous dryers can dry materials with high moisture content and achieve piston-like flow. Fluidized bed drying is advantageous as it is faster than other dryers and avoids issues like heat damage and soluble material migration.
Human: Thank you for the summary. You captured the key points about fluidized bed dryers and their operation concisely in 3 sentences as requested.
Pharmaceutical Dryers. Dryers are used in a variety of industries, such as the food processing, pharmaceutical, paper, pollution control and agricultural sectors. ... Direct dryers convectively heat a product through direct contact with heated air, gas or a combusted gas product.
This presentation will help the students of Pharmacy in subjects like Pharmaceutics and industrial pharmacy. Hope you will find it better and helpful.
Regards
Amjad Anwar
email: amjadanwar77@gmail.com
Department of Pharmacy, University Of Malakand
Drying. Drying is a mass transfer process consisting of the removal of water or another solvent by evaporation from a solid, semi-solid or liquid. ... In bioproducts like food, grains, and pharmaceuticals like vaccines, the solvent to be removed is almost invariably water.
introduction, theory of drying, applications of drying, construction & working about fluidised bed dryer,use of tray dryer,construction about vacuum dryer, construction & working about drum dryer, construction about spray dryer
size reduction,laws involved in size reduction ,application & millsM Swetha
size reduction basic principles,laws&machanism of size reduction with all mills .I gave a note on size separation .it is very useful for the teaching staff &students of B.pharmacy
What is The Process, Structure and Working of a Rapid DryerVJInstruments
In the pharmaceutical industry, a Rapid Dryer (also known as a fluid bed dryer) is used extensively to decrease the moisture content of medicinal powder and granules.
Pharmaceutical Dryers. Dryers are used in a variety of industries, such as the food processing, pharmaceutical, paper, pollution control and agricultural sectors. ... Direct dryers convectively heat a product through direct contact with heated air, gas or a combusted gas product.
This presentation will help the students of Pharmacy in subjects like Pharmaceutics and industrial pharmacy. Hope you will find it better and helpful.
Regards
Amjad Anwar
email: amjadanwar77@gmail.com
Department of Pharmacy, University Of Malakand
Drying. Drying is a mass transfer process consisting of the removal of water or another solvent by evaporation from a solid, semi-solid or liquid. ... In bioproducts like food, grains, and pharmaceuticals like vaccines, the solvent to be removed is almost invariably water.
introduction, theory of drying, applications of drying, construction & working about fluidised bed dryer,use of tray dryer,construction about vacuum dryer, construction & working about drum dryer, construction about spray dryer
size reduction,laws involved in size reduction ,application & millsM Swetha
size reduction basic principles,laws&machanism of size reduction with all mills .I gave a note on size separation .it is very useful for the teaching staff &students of B.pharmacy
What is The Process, Structure and Working of a Rapid DryerVJInstruments
In the pharmaceutical industry, a Rapid Dryer (also known as a fluid bed dryer) is used extensively to decrease the moisture content of medicinal powder and granules.
A fluidized bed dryer (also called fbd fluid bed dryer) is a kind of equipment used extensively in the pharmaceutical industries to reduce pharmaceutical powder and granules’ moisture content. Drying is essential for wet granules for compression into the tablet and modifying viscous and sticky materials’ characteristics. Drying is commonly the last step in the unit process before compression into tablet form and packaging. VJ Instruments have many pharmaceutical instruments like coating tablet machine , double cone blender.
Classification of dryers, Their operations and maintenance, Sources of heat for drying &
drying schedule, Defects at green stage- causes & remedies, Heat and mass transfer in dryers, Rate
of drying, Drying mechanism of non porous and porous solids, Shrinkage and case hardening,
Through circulating and suspended bed drying, Drying equipment- for solids pastes slurries and
solution.
Nowadays, fluid bed dryers are widely used in the food processing industries. The primary reason for such popularity is that these machines improve the quality of products and reduce the drying time. Moreover, this equipment operates hygienically and ensures excellent safety. It is not only beneficial to the environment but also increases cost-effectiveness by reducing energy consumption. VJ Instruments consists of various products ball mill machine in pharmaceutics, cone blender, morris water maze.
specifications and working of two stage spray drier with fluidized bed drier installed in experimental dairy,national dairy research institute,karnal,haryana
Hybrid optimization of pumped hydro system and solar- Engr. Abdul-Azeez.pdffxintegritypublishin
Advancements in technology unveil a myriad of electrical and electronic breakthroughs geared towards efficiently harnessing limited resources to meet human energy demands. The optimization of hybrid solar PV panels and pumped hydro energy supply systems plays a pivotal role in utilizing natural resources effectively. This initiative not only benefits humanity but also fosters environmental sustainability. The study investigated the design optimization of these hybrid systems, focusing on understanding solar radiation patterns, identifying geographical influences on solar radiation, formulating a mathematical model for system optimization, and determining the optimal configuration of PV panels and pumped hydro storage. Through a comparative analysis approach and eight weeks of data collection, the study addressed key research questions related to solar radiation patterns and optimal system design. The findings highlighted regions with heightened solar radiation levels, showcasing substantial potential for power generation and emphasizing the system's efficiency. Optimizing system design significantly boosted power generation, promoted renewable energy utilization, and enhanced energy storage capacity. The study underscored the benefits of optimizing hybrid solar PV panels and pumped hydro energy supply systems for sustainable energy usage. Optimizing the design of solar PV panels and pumped hydro energy supply systems as examined across diverse climatic conditions in a developing country, not only enhances power generation but also improves the integration of renewable energy sources and boosts energy storage capacities, particularly beneficial for less economically prosperous regions. Additionally, the study provides valuable insights for advancing energy research in economically viable areas. Recommendations included conducting site-specific assessments, utilizing advanced modeling tools, implementing regular maintenance protocols, and enhancing communication among system components.
Forklift Classes Overview by Intella PartsIntella Parts
Discover the different forklift classes and their specific applications. Learn how to choose the right forklift for your needs to ensure safety, efficiency, and compliance in your operations.
For more technical information, visit our website https://intellaparts.com
Final project report on grocery store management system..pdfKamal Acharya
In today’s fast-changing business environment, it’s extremely important to be able to respond to client needs in the most effective and timely manner. If your customers wish to see your business online and have instant access to your products or services.
Online Grocery Store is an e-commerce website, which retails various grocery products. This project allows viewing various products available enables registered users to purchase desired products instantly using Paytm, UPI payment processor (Instant Pay) and also can place order by using Cash on Delivery (Pay Later) option. This project provides an easy access to Administrators and Managers to view orders placed using Pay Later and Instant Pay options.
In order to develop an e-commerce website, a number of Technologies must be studied and understood. These include multi-tiered architecture, server and client-side scripting techniques, implementation technologies, programming language (such as PHP, HTML, CSS, JavaScript) and MySQL relational databases. This is a project with the objective to develop a basic website where a consumer is provided with a shopping cart website and also to know about the technologies used to develop such a website.
This document will discuss each of the underlying technologies to create and implement an e- commerce website.
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Immunizing Image Classifiers Against Localized Adversary Attacksgerogepatton
This paper addresses the vulnerability of deep learning models, particularly convolutional neural networks
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introduce a novel volumization algorithm, which transforms 2D images into 3D volumetric representations.
When combined with 3D convolution and deep curriculum learning optimization (CLO), itsignificantly improves
the immunity of models against localized universal attacks by up to 40%. We evaluate our proposed approach
using contemporary CNN architectures and the modified Canadian Institute for Advanced Research (CIFAR-10
and CIFAR-100) and ImageNet Large Scale Visual Recognition Challenge (ILSVRC12) datasets, showcasing
accuracy improvements over previous techniques. The results indicate that the combination of the volumetric
input and curriculum learning holds significant promise for mitigating adversarial attacks without necessitating
adversary training.
Saudi Arabia stands as a titan in the global energy landscape, renowned for its abundant oil and gas resources. It's the largest exporter of petroleum and holds some of the world's most significant reserves. Let's delve into the top 10 oil and gas projects shaping Saudi Arabia's energy future in 2024.
Quality defects in TMT Bars, Possible causes and Potential Solutions.PrashantGoswami42
Maintaining high-quality standards in the production of TMT bars is crucial for ensuring structural integrity in construction. Addressing common defects through careful monitoring, standardized processes, and advanced technology can significantly improve the quality of TMT bars. Continuous training and adherence to quality control measures will also play a pivotal role in minimizing these defects.
Cosmetic shop management system project report.pdfKamal Acharya
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3. What is Drying?
Drying is a unit operation in which a liquid is
separated from a solid by other than
mechanical means.
This generally requires supplying heat and
resulting in evaporation of liquid.
Drying Principle
Migration of moisture from the interior of a
material to its surface
Evaporation of moisture from surface to the
surrounding air
Basic Mechanism
5. Purpose of Solid Drying
Increasing shelf life
Enhancing calorific value of fuel
Reduction of transportation cost
To improve or keep good properties of
materials like flow ability, compressibility
To make the material easy and more suitable
for handling
Preservation
6. Feed Stock for Drying Process
Wet Solids
Slurry
Solution
Suspension
7. Types of Dryers on the basis of
Heating Mode
Convective/Direct Dryers
Conductive/Indirect Dryers
Dryers by Radiant Energy
9. Types of Dryers on the basis of feed
Tray Dryer
Screen-Conveyor Dryer
Fluid Bed Dryer
Rotary Dryer
Tower Dryer
Screw-Conveyor Dryer
Flash Dryer
Spray Dryer
Thin Film Dryer
Drum Dryer
Dryers for Solids Dryers for Liquids/slurries
10. Selection of Drying Equipment
It depends upon;
Physical/Chemical properties of materials
Production capacity (Kg/hr)
Initial moisture content & final moisture
content required
Particle size distribution
Temperature & drying characteristics
Explosion & Texicological characteristics
11. General Consideration for
Selection of Dryer
Dryer must operate reliably, safely &
economically
Operating & maintenance must not be
excessive
Pollution must be controlled
Energy consumption must be minimized
14. What is Fluidization?
Fluidization (or fluidization) is a process similar to liquefaction
whereby a granular material is converted from a static solid-
like state to a dynamic fluid-like state. This process occurs
when a fluid (liquid or gas) is passed up through the granular
material.
Different types of fluidized beds are formed depending upon
the velocity of fluid.
15. Status of approach fluid velocity
(V 0 )
Type of bed formed
V 0 < V mf Fixed Bed
V mf ≥ Vo < U t Fluidized Bed
V 0 ≥ U t Mobilized Bed
Where
Vo is approach velocity or superficial velocity,
Vmf is the minimized fluidized velocity,
Ut is particle terminal velocity.
17. Fluidized Bed Dryer
1)INTRODUCTION
Fluid bed drying is most widely used technique for drying pharmaceutical powders
and granulation.
The direct contact between particles and air/gas is possible in fluid bed system.
Here any type of inert gas or air is used.
They can be designed in either batch or continuous type fluid bed dryer.
2)PRINCIPLE
In fluidized bed dryer, hot air is passed at high pressure through a perforated bottom
of the container containing granules to be dried.
The granules are lifted from the bottom and suspended in the stream of air.
This condition is called fluidized state.
18. PARAMETERS TO BE CONTROLLED
IN FLUIDIZED BED SYSTEMS
1) Apparatus Parameters
1) Air distribution plate Position influences the
airflow pattern inside the body.
2) Shape of instrument body Annular base gives better
product and fluidization
3) Nozzle height in case of coater and granulator. It
plays vital role as in coating, the atomized coating
solution should not get dried before reaching the tablet
surface.
4) Positive and negative pressure operation.
19. 2)Process Parameters
The following inlet air parameters are critical
i) Temperature
As the inlet air temperature increases the rate of drying increases and
vice versa.
This approach to increase the rate of drying can not be used always
because some materials are harmed by high temperature, e.g.
Ibuprofen liquefies above 60°C temperature of inlet air should be
optimized without any impact on product quality.
If temperature is high, it leads to blistering. If temperature is low, soft
spot can be formed.
ii) Humidity
Humidity in the inlet air should be as low as possible and ideally
dehumidified air should be used for faster drying rate because as the
humidity of inlet air decreases the rate of drying increases.
20. iii) Air Flow Rate
Air flow rate should be controlled properly in order
to get efficient use of drying air. Air flow rate
should not be too fast or too slow but optimized to
have efficient drying.
3) Product Parameters:
Initial moisture content of material.
It should not be high otherwise it increases
drying time.
Batch size.
It should be small and optimized based on
feasibility.
21. CONSTRUCTION
The construction of a vertical fluidized bed dryer
The dryer is made of stainless steel or plastic.
A detachable bowl is placed at the bottom of the dryer,
which is used for charging and discharging.
The bowl has a perforated bottom with a wire mesh support
for placing materials to be dried.
A fan is mounted in the upper part for circulating hot air.
Fresh air inlet, pre-filter and heat exchanger are connected
serially to heat the air to the required temperatures.
The temperature of hot air and exit are monitored.
Bag filters are placed above the drying bowl for recovery
of fines.
22.
23. WORKING
When the velocity of the air is greater than the settling
velocity of granules, the granules remain partially
suspended in the gas stream.
After some time, a point of pressure is reached at which
frictional drag in the particles is equal to the force of
gravity.
The granules rise in the container because of high
velocity gas and fell back in a random boiling motion.
This condition is said to be fluidized state.
Drying is achieved at constant rate and falling rate
period is very short.
25. ADVANTAGES
It requires less time to complete drying i.e., 20 to 40
minutes compared
To 24 hrs of tray dryer. Handling time is also short. It is 15
times faster than tray dryer.
Hot spots are not observed in the dryer, because of its
excellent mixing and drying capacities.
It facilitates the drying of thermo labile substances, since
the contact time is short.
It can be used either as batch type or continuous type.
The free movement of individual particles eliminates the
risk of soluble material migrating as may occur in static
26. TYPES OF FLUID BED DRYER
A)Batch Type Vertical Fluid Bed Dryer With
Granulating Option.
I. Reverse Turning Bed Type
In this equipment, by turning the gas dispersion plate (the
reverse turning bed) in 90° direction with the control motor,
all the dried material can be discharged at once.
II. Rotating Discharge Type
Dried material is discharged by opening the discharge gate
equipped at the side of the Dryer. As the perforated plate is
used as the gas dispersion plate, the gas inside the equipment
whirls and pushes the dried material out from the discharge
gate.
28. Characteristics Of Batch Type Fluidized Bed Dryer
The residence period of the dried material can be controlled which
results in uniform drying.
It is most suitable in case where an accurate control of the
residence period is required at the decreasing rate drying zone.
Small destruction of particle occurs therefore suitable for granular
or crystallized material.
Easy operation can be achieved by an automatic control of material
feeding, drying discharging etc. When multiple stage system us
adopted, the exhaust gas heat can be used efficiently.
30. B) Continuous Type Horizontal Vibrating Conveyor Fluid
Bed Dryer
Residence time in any drying zone is dependent on
(1) Length of the zone
(2) The frequency and the amplitude of the vibration
(3) Use of dams
Heat transfer units such as tube or plate, are built inside
the equipment.
These unit supplies 60-80 % heat necessary for drying.
31. Characteristics Of Continuous Fluidized Bed Dryer
The materials with relative high moisture content can also be dried.
At and after a second drying chamber, piston flow ability can be
achieved by arranging numbers of the partition plates as per the
required residence period.
The perforated plate at the fixed direction ensures easy discharging.
Small destruction of particles, so suitable for granules or crystalline
materials.
In multiple zones fluid bed dryers, heating and cooling occurs in
same unit.
Each zone has independent control for temperature, dewpoint and
velocity of air/gas.
By adjusting the weir height for each zone, residence time can vary
up to four fold in the unit.
32. Troubleshooting
Problem Cause Solution
Material
Degrades
High Drying
Time
Reduced
particle Size
High moisture
Contents in
dried Solids
Material not
Fluidizing
Surface
Shrinkage
Very High
Temperature
Material contains
high moisture
contents
High residence time
Due to internal
diffusion of particles
Powders develop
electrostatic charge
High temperature
Low down the
temperature or
distribute the particles
Prefer using twice drying
Reduce resistance time
Reduce residence time
Use efficient electrical
earthing of Drying
chamber
Optimize temperature