The document discusses various methods of leaching, which is the process of extracting soluble constituents from a solid material using a liquid solvent. It describes several common leaching techniques used in industries like food processing, pharmaceuticals, and metals extraction. These include counter-current leaching systems that improve extraction efficiency, as well as equipment used for leaching like agitated vessels, thickeners, extractors, and the Kennedy and Bollman extractors.
wholw Content is covered in this presentation .it will give u a basic idea and types about leaching and it will also provide u information via Diagrams .
wholw Content is covered in this presentation .it will give u a basic idea and types about leaching and it will also provide u information via Diagrams .
Different settling methods in mechanical operations Jaydrath Sindhav
Its part of sedimentation which is covered under the Mechanical operations. It contains the gravity sedimentation, clarifier and classifiers, sink and float method, gravity and sorting classifiers, differential settling methods etc....
Its just gives basic concept of sedimentation.
it is a mass transfer operation use in chemical industries
it is a simple diffusion of solid to liquid phase and foam a new concentrate liquid solution
it is base on simple diffusion how to work in industries this operation
it is use for pharma, seeds and oil industries.
Koch Modular Process Systems, LLC. (KMPS) Extraction Technology Group specializes in the design and supply of liquid-liquid extraction equipment engineered to fulfill the chemical, pharmaceutical, petrochemical, biotech and flavor & fragrance industries’ increasingly challenging purification requirements. Our extractor design expertise includes SCHEIBEL® Columns, KARR® Columns, rotating disc contactor (RDC) columns, pulsed, packed (SMVP) and sieve tray.
At KMPS, we don’t just sell extraction equipment; we supply solutions to your difficult separation applications.
KMPS also provides replacements parts, repair services and troubleshooting assistance for all types of extraction columns. A qualified technician or engineer can be provided on-site for both mechanical and process related support.
Absorption & indusrial absorber,Gas Absorption,Equipments,Absorption in chemical Reaction,Absorption in Packed Tower,Absorption for counter current,Choice of Solvent,Continuous Contact Equipment,Height Equivalent to Theoretical Plate,HETP
The processing technique employing a suspension or fluidization of small solid particles in a vertically rising stream of fluid usually gas so that fluid and solid come into intimate contact. This is a tool with many applications in the petroleum and chemical process industries. Suspensions of solid particles by vertically rising liquid streams are of lesser interest in modern processing, but have been shown to be of use, particularly in liquid contacting of ion-exchange resins. However, they come in this same classification and their use involves techniques of liquid settling, both free and hindered (sedimentation), classification, and density flotation.
Filtration
0 INTRODUCTION
1 The Theory Underlying Filtration Processes
1.1 The Mechanism of Simple Filtration Systems
1.1.2 Cake Filtration
1.1.3 Complete Blocking
1.1.4 Standard Blocking
1.1.5 Intermediate Blocking
1.2 Cake Filtration – Models and Mechanisms
1.2.1 Classical Theory for the Permeability of Porous Cakes and Beds
1.2.2 The Rate of Filtration through a Compressible Cake – The Standard Filtration Equation
1.2.3 The Compression or Consolidation of Filter Cakes – Ultimate degree of dewatering
1.2.4 The Rate of Consolidation
1.2.5 Useful Semi-Empirical Relations for Constant Pressure and Constant Rate Cake Filtration
1.2.6 Constant Pressure Filtration
1.2.7 Constant Rate Filtration
1.2.8 Multiphase Theory of Filtration
1.3 Crossflow Filtration
2 The Range and Selection of Filtration Equipment Technology
2.1 Scale
2.2 Solids Recovery, Liquids Clarification or Feed stream Concentration
2.3 Rate of Sedimentation
2.4 Rate of Cake Formation and Drainage
2.5 Batch vs Continuous Operation
2.6 Solids Loading
2.7 Further Processing
2.8 Aseptic or “Hygienic” Operation
2.9 Miscellaneous
2.10 Shear versus Compressional Deformation
2.11 Pressure versus Vacuum
3 Suspension Conditioning Prior to Filtration
3.1 Simple Filtration Aids
3.2 Mechanical Treatments
4 Post-Filtration Treatments and Further Downstream Processing
4.1 Washing
4.1.1 Air-Blowing
4.1.2 Drying
5 Testing and Characterization of Suspensions
5.1 Introduction – Suspension
5.2 Properties relevant to Filtration Performance
5.2.1 Pre-Filtration Properties of Suspension
5.2.2 Properties of Filter Cake
5.2.3 Laboratory Scale Filtration Rigs
5.3 Means of Monitoring Flocculant Dosage
5.4 Filter Cake Testing
5.4.1 Strength Testing (See also piston press described earlier)
5.4.2 Cake Permeability or Resistance
5.4.3 Rate of Cake Formation
6 Examples of the Application of the Forgoing Principles
6.1 Dewatering of Calcium Carbonate Slurries
6.2 Dewatering of Organic Products – Procion Dyestuffs
6.3 Filtration of Biological Systems – Harvesting a Filamentous Organism
References
Tables
Figures
This PPT contains Basics and Detail study of Liquid Liquid Extraction.....one of the unit operation in Mass Transfer. Also contains solvent selection criteria.
Presentation on Azeotropic and Extractive Distillation. Introduction about distillation, azeotropic and extractive distillation and the difference between them.
Single and multiple effective evaporator (mee)Sumer Pankaj
A multiple-effect evaporator, as defined in chemical engineering, is an apparatus for efficiently using the heat from steam to evaporate water.[1] In a multiple-effect evaporator, water is boiled in a sequence of vessels, each held at a lower pressure than the last. Because the boiling temperature of water decreases as pressure decreases, the vapor boiled off in one vessel can be used to heat the next, and only the first vessel (at the highest pressure) requires an external source of heat. While in theory, evaporators may be built with an arbitrarily large number of stages, evaporators with more than four stages are rarely practical except in systems where the liquor is the desired product such as in chemical recovery systems where up to seven effects are used.
The multiple-effect evaporator was invented by an African-American inventor and engineer Norbert Rillieux. Although he may have designed the apparatus during the 1820s and constructed a prototype in 1834, he did not build the first industrially practical evaporator until 1845. Originally designed for concentrating sugar in sugar cane juice, it has since become widely used in all industrial applications where large volumes of water must be evaporated, such as salt production and water desalination.
Multiple effect evaporation commonly uses sensible heat in the condensate to preheat liquor to be flashed. In practice the design liquid flow paths can be somewhat complicated in order to extract the most recoverable heat and to obtain the highest evaporation rates from the equipment.
Multiple-effect evaporation plants in sugar beet factories have up to eight effects. Six effect evaporators are common in the recovery of black liquor in the kraft process for making wood pulp.
Different settling methods in mechanical operations Jaydrath Sindhav
Its part of sedimentation which is covered under the Mechanical operations. It contains the gravity sedimentation, clarifier and classifiers, sink and float method, gravity and sorting classifiers, differential settling methods etc....
Its just gives basic concept of sedimentation.
it is a mass transfer operation use in chemical industries
it is a simple diffusion of solid to liquid phase and foam a new concentrate liquid solution
it is base on simple diffusion how to work in industries this operation
it is use for pharma, seeds and oil industries.
Koch Modular Process Systems, LLC. (KMPS) Extraction Technology Group specializes in the design and supply of liquid-liquid extraction equipment engineered to fulfill the chemical, pharmaceutical, petrochemical, biotech and flavor & fragrance industries’ increasingly challenging purification requirements. Our extractor design expertise includes SCHEIBEL® Columns, KARR® Columns, rotating disc contactor (RDC) columns, pulsed, packed (SMVP) and sieve tray.
At KMPS, we don’t just sell extraction equipment; we supply solutions to your difficult separation applications.
KMPS also provides replacements parts, repair services and troubleshooting assistance for all types of extraction columns. A qualified technician or engineer can be provided on-site for both mechanical and process related support.
Absorption & indusrial absorber,Gas Absorption,Equipments,Absorption in chemical Reaction,Absorption in Packed Tower,Absorption for counter current,Choice of Solvent,Continuous Contact Equipment,Height Equivalent to Theoretical Plate,HETP
The processing technique employing a suspension or fluidization of small solid particles in a vertically rising stream of fluid usually gas so that fluid and solid come into intimate contact. This is a tool with many applications in the petroleum and chemical process industries. Suspensions of solid particles by vertically rising liquid streams are of lesser interest in modern processing, but have been shown to be of use, particularly in liquid contacting of ion-exchange resins. However, they come in this same classification and their use involves techniques of liquid settling, both free and hindered (sedimentation), classification, and density flotation.
Filtration
0 INTRODUCTION
1 The Theory Underlying Filtration Processes
1.1 The Mechanism of Simple Filtration Systems
1.1.2 Cake Filtration
1.1.3 Complete Blocking
1.1.4 Standard Blocking
1.1.5 Intermediate Blocking
1.2 Cake Filtration – Models and Mechanisms
1.2.1 Classical Theory for the Permeability of Porous Cakes and Beds
1.2.2 The Rate of Filtration through a Compressible Cake – The Standard Filtration Equation
1.2.3 The Compression or Consolidation of Filter Cakes – Ultimate degree of dewatering
1.2.4 The Rate of Consolidation
1.2.5 Useful Semi-Empirical Relations for Constant Pressure and Constant Rate Cake Filtration
1.2.6 Constant Pressure Filtration
1.2.7 Constant Rate Filtration
1.2.8 Multiphase Theory of Filtration
1.3 Crossflow Filtration
2 The Range and Selection of Filtration Equipment Technology
2.1 Scale
2.2 Solids Recovery, Liquids Clarification or Feed stream Concentration
2.3 Rate of Sedimentation
2.4 Rate of Cake Formation and Drainage
2.5 Batch vs Continuous Operation
2.6 Solids Loading
2.7 Further Processing
2.8 Aseptic or “Hygienic” Operation
2.9 Miscellaneous
2.10 Shear versus Compressional Deformation
2.11 Pressure versus Vacuum
3 Suspension Conditioning Prior to Filtration
3.1 Simple Filtration Aids
3.2 Mechanical Treatments
4 Post-Filtration Treatments and Further Downstream Processing
4.1 Washing
4.1.1 Air-Blowing
4.1.2 Drying
5 Testing and Characterization of Suspensions
5.1 Introduction – Suspension
5.2 Properties relevant to Filtration Performance
5.2.1 Pre-Filtration Properties of Suspension
5.2.2 Properties of Filter Cake
5.2.3 Laboratory Scale Filtration Rigs
5.3 Means of Monitoring Flocculant Dosage
5.4 Filter Cake Testing
5.4.1 Strength Testing (See also piston press described earlier)
5.4.2 Cake Permeability or Resistance
5.4.3 Rate of Cake Formation
6 Examples of the Application of the Forgoing Principles
6.1 Dewatering of Calcium Carbonate Slurries
6.2 Dewatering of Organic Products – Procion Dyestuffs
6.3 Filtration of Biological Systems – Harvesting a Filamentous Organism
References
Tables
Figures
This PPT contains Basics and Detail study of Liquid Liquid Extraction.....one of the unit operation in Mass Transfer. Also contains solvent selection criteria.
Presentation on Azeotropic and Extractive Distillation. Introduction about distillation, azeotropic and extractive distillation and the difference between them.
Single and multiple effective evaporator (mee)Sumer Pankaj
A multiple-effect evaporator, as defined in chemical engineering, is an apparatus for efficiently using the heat from steam to evaporate water.[1] In a multiple-effect evaporator, water is boiled in a sequence of vessels, each held at a lower pressure than the last. Because the boiling temperature of water decreases as pressure decreases, the vapor boiled off in one vessel can be used to heat the next, and only the first vessel (at the highest pressure) requires an external source of heat. While in theory, evaporators may be built with an arbitrarily large number of stages, evaporators with more than four stages are rarely practical except in systems where the liquor is the desired product such as in chemical recovery systems where up to seven effects are used.
The multiple-effect evaporator was invented by an African-American inventor and engineer Norbert Rillieux. Although he may have designed the apparatus during the 1820s and constructed a prototype in 1834, he did not build the first industrially practical evaporator until 1845. Originally designed for concentrating sugar in sugar cane juice, it has since become widely used in all industrial applications where large volumes of water must be evaporated, such as salt production and water desalination.
Multiple effect evaporation commonly uses sensible heat in the condensate to preheat liquor to be flashed. In practice the design liquid flow paths can be somewhat complicated in order to extract the most recoverable heat and to obtain the highest evaporation rates from the equipment.
Multiple-effect evaporation plants in sugar beet factories have up to eight effects. Six effect evaporators are common in the recovery of black liquor in the kraft process for making wood pulp.
A Soxhlet extractor is a piece of laboratory apparatus invented in 1879 by Franz von Soxhlet. It was originally designed for the extraction of a lipid from a solid material. However, a Soxhlet extractor is not limited to the extraction of lipids. Typically, a Soxhlet extraction is only required where the desired compound has a limited solubility in a solvent, and the impurity is insoluble in that solvent. If the desired compound has a high solubility in a solvent then a simple filtration can be used to separate the compound from the insoluble substance.
Summer internship
Jasim Alajmi
21/7/2018
Golf station visit (G) :
Well design:
· Surface casing which is the first part under the charismas tree, it is mostly 16 in diameter. Under that the intermediate casing followed by the production casing.
· The production casing covers the tube or the rod that’s moves up and down.
· Down in the reservoir there is the casing perforation which takes fingers shape. It is basically small paths for oil to come through.
Charismas tree:
· A Christmas tree is an assembly of valves along with adapters. It is usually the part that can be seen in the top of the well.
· Charismas tree is very beneficial to prevent any blockage, control the injection, and control system to the downhole safety valve.
· The two master valves (upper and lower), they lie in the flow path, which well fluids must take to get to the surface.
· The lower master valve will normally be manually operated, while the upper master valve is often hydraulically controlled.
· The left hand valve is often called the kill wing valve. It is primarily used for injection of fluids such as corrosion inhibitors or methanol to prevent hydrate formation.
· The right hand valve is often called the flow wing valve or the production wing valve; because it is in the flow path the hydrocarbons take to production facilities.
· The valve at the top is called the swab valve and lies in the path used for well interventions like wireline and coiled tubing.
Beam pump:
· The beam pump convert the rotation motion to horizontal motion in order to suck up the oil form the reservoir.
· Counterbalance weight is mainly for balancing two sides.
· Brake lever’s purpose is to stop the pump from operation manually.
· Polished rod’s diameter is bigger than the sucker rod, so it can afford the heavy lifting.
· The beam pump is operated by motor in the back side of it.
· When the upstroke raises the horsehead and the plunger, the oil is being pumped.
· The traveling valve is very important where it control the flow of the oil inside the plunger along with the standing valve. Those valves are being control by the fluid flow only.
· During the upstroke, the traveling valve is close while the standing valve is open. This situation allows the fluid above and within the plunger to be lifted up and no fluid is leaving the plunger.
· During the down stroke, the traveling valve is open while the standing valve is closed. This situation allows the fluid to go into the plunger and not leaving the well because the standing valve is closed.
Multi selector valve (MSV):
· The MSV is a highly efficient fluid controller system. It is the first stop for the oil that is coming from the well where one MSV collect the oil from 7 different wells.
· Inside the MSV there is a selector device that reroute the fluid to a testing path in order to do some testing for the fluid in another location such as the lab.
· There is a production outlet next to the test outlet which i ...
Extraction
Various methods
Extraction with reflux
Extraction with agitation
Counter current extraction
reserve percolation process, continuous hot percolation process
decoction
infusion
digestion
Extraction with agitation
Maceration with adjustment
UNIT OPERATIONS (unit 2) pharmaceutical process chemistrySaketChoudhary13
its a presentation on the 2nd unit of pharmaceutical process chemistry which include extraction ,filtration and steam distillation and azeotropic distillation
various types of flow meter
1. rotameter
2. venturimeter
3. electromagnetic flow meter
4. positive displacement flow meter
with their working advantage and disadvantages
Explore the innovative world of trenchless pipe repair with our comprehensive guide, "The Benefits and Techniques of Trenchless Pipe Repair." This document delves into the modern methods of repairing underground pipes without the need for extensive excavation, highlighting the numerous advantages and the latest techniques used in the industry.
Learn about the cost savings, reduced environmental impact, and minimal disruption associated with trenchless technology. Discover detailed explanations of popular techniques such as pipe bursting, cured-in-place pipe (CIPP) lining, and directional drilling. Understand how these methods can be applied to various types of infrastructure, from residential plumbing to large-scale municipal systems.
Ideal for homeowners, contractors, engineers, and anyone interested in modern plumbing solutions, this guide provides valuable insights into why trenchless pipe repair is becoming the preferred choice for pipe rehabilitation. Stay informed about the latest advancements and best practices in the field.
NO1 Uk best vashikaran specialist in delhi vashikaran baba near me online vas...Amil Baba Dawood bangali
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Student information management system project report ii.pdfKamal Acharya
Our project explains about the student management. This project mainly explains the various actions related to student details. This project shows some ease in adding, editing and deleting the student details. It also provides a less time consuming process for viewing, adding, editing and deleting the marks of the students.
Automobile Management System Project Report.pdfKamal Acharya
The proposed project is developed to manage the automobile in the automobile dealer company. The main module in this project is login, automobile management, customer management, sales, complaints and reports. The first module is the login. The automobile showroom owner should login to the project for usage. The username and password are verified and if it is correct, next form opens. If the username and password are not correct, it shows the error message.
When a customer search for a automobile, if the automobile is available, they will be taken to a page that shows the details of the automobile including automobile name, automobile ID, quantity, price etc. “Automobile Management System” is useful for maintaining automobiles, customers effectively and hence helps for establishing good relation between customer and automobile organization. It contains various customized modules for effectively maintaining automobiles and stock information accurately and safely.
When the automobile is sold to the customer, stock will be reduced automatically. When a new purchase is made, stock will be increased automatically. While selecting automobiles for sale, the proposed software will automatically check for total number of available stock of that particular item, if the total stock of that particular item is less than 5, software will notify the user to purchase the particular item.
Also when the user tries to sale items which are not in stock, the system will prompt the user that the stock is not enough. Customers of this system can search for a automobile; can purchase a automobile easily by selecting fast. On the other hand the stock of automobiles can be maintained perfectly by the automobile shop manager overcoming the drawbacks of existing system.
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.
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
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.
Event Management System Vb Net Project Report.pdfKamal Acharya
In present era, the scopes of information technology growing with a very fast .We do not see any are untouched from this industry. The scope of information technology has become wider includes: Business and industry. Household Business, Communication, Education, Entertainment, Science, Medicine, Engineering, Distance Learning, Weather Forecasting. Carrier Searching and so on.
My project named “Event Management System” is software that store and maintained all events coordinated in college. It also helpful to print related reports. My project will help to record the events coordinated by faculties with their Name, Event subject, date & details in an efficient & effective ways.
In my system we have to make a system by which a user can record all events coordinated by a particular faculty. In our proposed system some more featured are added which differs it from the existing system such as security.
COLLEGE BUS MANAGEMENT SYSTEM PROJECT REPORT.pdfKamal Acharya
The College Bus Management system is completely developed by Visual Basic .NET Version. The application is connect with most secured database language MS SQL Server. The application is develop by using best combination of front-end and back-end languages. The application is totally design like flat user interface. This flat user interface is more attractive user interface in 2017. The application is gives more important to the system functionality. The application is to manage the student’s details, driver’s details, bus details, bus route details, bus fees details and more. The application has only one unit for admin. The admin can manage the entire application. The admin can login into the application by using username and password of the admin. The application is develop for big and small colleges. It is more user friendly for non-computer person. Even they can easily learn how to manage the application within hours. The application is more secure by the admin. The system will give an effective output for the VB.Net and SQL Server given as input to the system. The compiled java program given as input to the system, after scanning the program will generate different reports. The application generates the report for users. The admin can view and download the report of the data. The application deliver the excel format reports. Because, excel formatted reports is very easy to understand the income and expense of the college bus. This application is mainly develop for windows operating system users. In 2017, 73% of people enterprises are using windows operating system. So the application will easily install for all the windows operating system users. The application-developed size is very low. The application consumes very low space in disk. Therefore, the user can allocate very minimum local disk space for this application.
Industrial Training at Shahjalal Fertilizer Company Limited (SFCL)MdTanvirMahtab2
This presentation is about the working procedure of Shahjalal Fertilizer Company Limited (SFCL). A Govt. owned Company of Bangladesh Chemical Industries Corporation under Ministry of Industries.
Industrial Training at Shahjalal Fertilizer Company Limited (SFCL)
Leaching
1.
2. Leaching is a preferential solution of one or more constituents
of solid mixture by contact with a liquid solvent. This unit
operation is one of the oldest in the chemical industries.
3. Leaching is widely used in the biological and food processing
industries, such as the separation of sugar from sugar beets
with hot water.
The extraction of oils from peanuts, soybeans, sunflower
seeds, cotton seeds, and halibut livers.
In pharmaceutical industry, many products are obtained by
leaching plant roots, leaves, and stems.
In the metals processing industry, leaching is used to remove
the metals from their ores, which contains many undesirable
constituents, as solute salts.
In gold leaching, gold is leached from its ore using an
aqueous sodium cyanide solution.
4. Leaching and washing of the leached solute from
percolation tank by crosscurrent methods results in
weak solutions of the solute. The strongest solution
will result if counter current scheme is used, wherein
the final withdrawn solution is taken from contact
with the freshest solid and the fresh solvent is added
to solid from which most of the solute has been
already leached or washed.
5.
6. This shank system is operated in following manner:
1. Assume at the time of inspecting the system at figA
that it has been in operation for some time. Tank 6 is
empty, tanks 1 to 5 are filed with solid and with
leached liquid and tank 5 is n contact with freshest
solid. Fresh solvent is added to tank 1.
2. Withdraw the concentrated solution from tank 5,
transfer the liquid from tank 4 to tank 5, 3 to 4, 2 to
3, 1 to 2. Add fresh solid to tank 6.
3. Refer figB . Discard the spent sold frm tank 1.
Transfer the liquid from tank 5 to 6, 4 to 5, 3 to 4, 2
to 3,. Add fresh solvent to tank 2.
4. Continue the operation in the same manner as
before.
9. The kennedy extractor, a modern arrangement of
which is indicated schematically in figure is another
stagewise device which has been in use since
1927,originally for leaching tannins from tanbark.it
is now used for oilseed and other chemical leaching
operations.
The solids are leached in a series of tubs and are
pushed from one to the next in the cascade by
paddles, while the solvent flows in counter-current.
10. Perforation in the paddles permit drainage of the
solids between stages and the solids are scraped from
each paddle as shown.
As many tubs may be placed in a cascade are as
require.
12. The solids to be leached, together with solution from
the second thickner are introduced into the leaching
agitators at the left and the strong solution thus
produced is decanted from the solids by the first
thickener.
The agitators together with the first thickener then
constitute a single stage.
The sludge is passed through the cascade to be
washed by the solvent in true counter-current fashion
and the washed solids are discharge at the right
13. There may, of course be more or fewer than the four
stages shown, and the agitators may be replaced by
any continuous leaching device, such as a grinding
mill.
Many variations in the flowsheet are regularly made.
14.
15. Bollman Extractor is mainly used for the recovery of
additional oil from the residues obtained after
mechanical pressing of solids.
The Bollman Extractor essentially consists of a
vapour tight vertical chamber in which a series of
perforated baskets are attached to a chain conveyor.
16. The baskets are provided with perforations at the
bottom.
At the top right hand corner of the extractor solids
are conveyed in to the perforated baskets. The
baskets are loaded with flaky solids.
These fully loaded baskets are then sprayed with
Half Micelle as they travel downward through the
right hand side.
Half Miscella is the intermediate solvent containing
some extracted oil and some small solid particles.
17. As the solids and solvent flow co-currently down the
right hand side of the machine, the solvent extracts
more oil.
Simultaneously the fine solids are filtered out of the
solvent, so that the clean full miscella can be pumped
from the outlet provided at the right hand bottom.
Then as these partially extracted solids rise through
the left hand side of the machine a stream of pure
solvent is sprayed on them to obtain a dilute solution
of the oil (half miscella) at the bottom of the
chamber.
18. This pure solvent percolates counter-currently
through them and collects in the left hand sump
which is then passed to the Half Miscella storage
tank.
The fully extracted solids are then dumped from the
baskets at the top of the elevator to the hoppers from
which they are removed by Screw Conveyors.
Usually the conveyor speed is one revolution per
hour.
19. In the Rotocel
extractor,illusrated in figure
b,
A horizontal basket is
divided into walled
compartments with a floor
that is permeable to the
liquid.The basket rotates
slowly about a vertical
axis.
20. Solids are admitted to each compartment at the feed
point;the compartments then successively pass a
number of solvent sprays, a drainage section, and a
discharge point at which the floor of the
compartment opens to discharge the extracted
solids.The empty compartment moves to the feed to
point to receive its next load of solids.
To give countercurrent extraction, fresh solvent is
fed only to the last compartment before the discharge
point, and the solids in each preceeding compartment
are washed with the effluent from the succeeding