This document discusses wood, pulp production, and bleaching. It begins by describing different types of wood like deciduous and coniferous, and their characteristics. It then outlines the pulp production process which involves steps like debarking, chipping, and defibering wood. There are two main types of pulp - mechanical and chemical. Mechanical pulp retains more wood components while chemical pulp removes more lignin. The document concludes with an overview of bleaching methods used to remove colored substances from pulp like elemental chlorine, ozone, and hydrogen peroxide.
Pulp and Paper Industry (Pulp Mill, Paper Mill, Printing and Writing Papers, ...Ajjay Kumar Gupta
Pulp and paper are manufactured from raw materials containing cellulose fibers, generally wood, recycled paper, and agricultural residues. In developing countries, about 60% of cellulose fibers originate from non wood raw materials such as bagasse, cereal straw, bamboo, reeds, esparto grass, jute, flax, and sisal. The main steps in pulp and paper manufacturing are: Raw material preparation and handling, Pulp manufacturing, Pulp Washing and Screening, Chemical recovery, Bleaching, Stock Preparation, and Papermaking.
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Niir Project Consultancy Services
106-E, Kamla Nagar, Opp. Spark Mall,
New Delhi-110007, India.
Email: npcs.ei@gmail.com , info@entrepreneurindia.co
Tel: +91-11-23843955, 23845654, 23845886, 8800733955
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it is about paper and pulp wood industry..it gives idea about processing of manufacturing of plywood....its too interesting....so download please...to create a own industry it will be too useful to you.....all the process given are so simple...and easy to understandable
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Pulp and Paper Industry (Pulp Mill, Paper Mill, Printing and Writing Papers, ...Ajjay Kumar Gupta
Pulp and paper are manufactured from raw materials containing cellulose fibers, generally wood, recycled paper, and agricultural residues. In developing countries, about 60% of cellulose fibers originate from non wood raw materials such as bagasse, cereal straw, bamboo, reeds, esparto grass, jute, flax, and sisal. The main steps in pulp and paper manufacturing are: Raw material preparation and handling, Pulp manufacturing, Pulp Washing and Screening, Chemical recovery, Bleaching, Stock Preparation, and Papermaking.
See more
https://goo.gl/MqZ7s4
https://goo.gl/jByd5s
https://goo.gl/4KnBEM
Contact us
Niir Project Consultancy Services
106-E, Kamla Nagar, Opp. Spark Mall,
New Delhi-110007, India.
Email: npcs.ei@gmail.com , info@entrepreneurindia.co
Tel: +91-11-23843955, 23845654, 23845886, 8800733955
Mobile: +91-9811043595
Fax: +91-11-23841561
Website : www.entrepreneurindia.co , www.niir.org
Tags
Pulp and Paper Industry, Pulp Mill, Paper Mill, Printing and Writing Papers, Corrugating Medium Paper, Newspapers Hardboards, Pulp and paper processing industry, Pulp and paper making business, Investment Opportunity for Pulp & Paper, Paper Manufacturing Plant, Pulp from Bamboo, Profitable pulp and paper business, Pulp and paper production, Manufacture of corrugating medium paper, Feasibility of recycled newspapers hardboards, Paper mill in India, Best small and cottage scale industries, Book of Pulp and Paper, Paper Board and Paper-based Technology, Book on Pulping and Papermaking, Business guidance for Pulp and paper industry, Business guidance to clients, Business Plan for a Startup Business, Business start-up, Drying of Paper, Great Opportunity for Startup, Hard-Board manufacturing, How to Start a Pulp and paper industry?, How to Start a Pulp and paper Production Business, How to start a successful Pulp and paper business, How to Start Pulp and paper Processing Industry in India, How to Start-Up a paper converting Business, Industry of pulp and paper, Kraft Paper manufacturing, Kraft Paper production, Kraft Process in the paper and pulp industry, Manufacture of pulp and paper, Modern small and cottage scale industries, Most Profitable Pulp and paper Processing Business Ideas, New small scale ideas in Pulp and paper processing industry, Paper and pulp industries, Paper and Pulp Production Technology book, Paper Making Small Business Manufacturing, Paper Production, Paper production line, Paper Production: The Kraft Process in the paper and pulp industry, Paper, Pulp and Paper Conversion, Papermaking Science and Technology book, Production of Kraft Paper, Production of Soda Semi-Chemical Pulp, Profitable small and cottage scale industries, Profitable Small Scale Pulp and paper manufacturing, Project for startups, Pulp and paper Based Profitable Projects, Pulp and paper Based Small Scale Industries Projects, Pulp and Paper Chemistry and Technology
it is about paper and pulp wood industry..it gives idea about processing of manufacturing of plywood....its too interesting....so download please...to create a own industry it will be too useful to you.....all the process given are so simple...and easy to understandable
............................................................
............................................................
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
Paper production (non-conventional sources) Aman Kapoor
As paper production from wood pulp is leading to huge environment imbalance therefore we should shift to some non conventional methods of paper production.
Dear Readers,
The presentation may be helpful for those who wants to know the basic concept of paper making process.
Please post your valuable comments improve the quality of presentation.
Regards,
Nirjhar.
Paper production (non-conventional sources) Aman Kapoor
As paper production from wood pulp is leading to huge environment imbalance therefore we should shift to some non conventional methods of paper production.
Dear Readers,
The presentation may be helpful for those who wants to know the basic concept of paper making process.
Please post your valuable comments improve the quality of presentation.
Regards,
Nirjhar.
Offset printing has the largest range of printing products, from visiting cards to newspapers, magazines, catalogues or illustrated books.
We distinguish between sheet offset printing and web offset printing.
In der Stoffaufbereitung werden sämtliche Komponenten, die für die Mischung des Papieres verwendet werden, zusammen geführt und rezeptmässig verarbeitet.
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The Roman Empire, a vast and enduring power, stands as one of history's most remarkable civilizations, leaving an indelible imprint on the world. It emerged from the Roman Republic, transitioning into an imperial powerhouse under the leadership of Augustus Caesar in 27 BCE. This transformation marked the beginning of an era defined by unprecedented territorial expansion, architectural marvels, and profound cultural influence.
The empire's roots lie in the city of Rome, founded, according to legend, by Romulus in 753 BCE. Over centuries, Rome evolved from a small settlement to a formidable republic, characterized by a complex political system with elected officials and checks on power. However, internal strife, class conflicts, and military ambitions paved the way for the end of the Republic. Julius Caesar’s dictatorship and subsequent assassination in 44 BCE created a power vacuum, leading to a civil war. Octavian, later Augustus, emerged victorious, heralding the Roman Empire’s birth.
Under Augustus, the empire experienced the Pax Romana, a 200-year period of relative peace and stability. Augustus reformed the military, established efficient administrative systems, and initiated grand construction projects. The empire's borders expanded, encompassing territories from Britain to Egypt and from Spain to the Euphrates. Roman legions, renowned for their discipline and engineering prowess, secured and maintained these vast territories, building roads, fortifications, and cities that facilitated control and integration.
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Culturally, the Romans were eclectic, absorbing and adapting elements from the civilizations they encountered, particularly the Greeks. Roman art, literature, and philosophy reflected this synthesis, creating a rich cultural tapestry. Latin, the Roman language, became the lingua franca of the Western world, influencing numerous modern languages.
Roman architecture and engineering achievements were monumental. They perfected the arch, vault, and dome, constructing enduring structures like the Colosseum, Pantheon, and aqueducts. These engineering marvels not only showcased Roman ingenuity but also served practical purposes, from public entertainment to water supply.
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Model Attribute Check Company Auto PropertyCeline George
In Odoo, the multi-company feature allows you to manage multiple companies within a single Odoo database instance. Each company can have its own configurations while still sharing common resources such as products, customers, and suppliers.
Macroeconomics- Movie Location
This will be used as part of your Personal Professional Portfolio once graded.
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Prepare a presentation or a paper using research, basic comparative analysis, data organization and application of economic information. You will make an informed assessment of an economic climate outside of the United States to accomplish an entertainment industry objective.
2. Contents
1. Wood types 3
1.1. Wood structure 6
1.2. Wood growth 7
1.3. Cellulose formation 8
1.4. Chemical composition 9
2. Pulp production 10
2.1. Woodyard 11
2.2. Debarking 12
2.3. Chipping 13
2.4. Defibring 14
2.4.1. Mechanical vs. chemical pulp 15
2.4.2. Mechanical pulp 16
2.4.3. Chemical pulp 19
2.5. Measurement data 24
2.6. Bleaching 25
2.6.1. Bleaching methods 27
3. Overview pulp mill Sappi Gratkorn 28
2 | Wood and Pulp | Sappi Fine Paper Europe
3. 1. Wood types
Typed
Wood
types
Deciduous Coniferous
(Hardwood) (Softwood)
Beech Spruce
Birch Pine
Poplar Fir
3 | Wood and Pulp | Sappi Fine Paper Europe
4. 1. Wood types
• Structure
Hardwood Softwood
Short fibres Long fibres
4 | Wood and Pulp | Sappi Fine Paper Europe
5. 1. Wood types
Characteristics for paper mixture (pulp)
Deciduous woord Nconiferous woodz
Short fibre Long fibre
Firmness Medium High
Flexibility Medium High
Bulk/Volume High Medium
Opacity High Medium
Suited for High g/m² Low g/m²
Fibre length 1 mm 2-3 mm
Fibre width 15-25 µm 35-45 µm
Basics: The magic is in the mixture
5 | Wood and Pulp | Sappi Fine Paper Europe
6. 1.1. Wood structure
• Bark:
– Outer layer consisting of dead cork cells
– Protection against damage, loss of water, weather, bacteria
– Bark cells do not grow, they burst
• Cork cambium:
– Builds cork cells and thus, the bark
– Closes tears in the bark coat
• Phloem (Inner bark)
– Storage and transport of substances for the process of assimilation
Assimilation = Conversion of substance and energy
• Cambium:
– The living, growing part of the tree
• Sapwood:
– Transport of water and nutrients, strengthening and assimilation substance storage
– One new ring is formed every year (in seasonally affected phases)
– Storage of lignin (gum)
• Heartwood:
– Supporting column, which usually starts to grow at a tree age of 20-40 years
• Pith:
– Dead fibre tissue, the core of the tree trunk
6 | Wood and Pulp | Sappi Fine Paper Europe
7. 1.2. Wood growth
Cambium splits
Spring off thin-walled
cells: spring
Broad growth
rings
wood
Cambium splits
Summer off thick-walled
cells: summer
Narrow growth
rings
wood
Winter No growth
No ring
formation
• Growth periods depending on climate and location
7 | Wood and Pulp | Sappi Fine Paper Europe
8. 1.3. Cellulose formation
– Grape sugar (glucose) is converted to starch by shedding water
– As it multiplies, cellulose is formed
8 | Wood and Pulp | Sappi Fine Paper Europe
9. 1.4. Chemical composition
• Cellulose:
– Primary cell wall substance
– Long, fibrous polysaccharide chain of glucose molecules
– Hydrogen bonding builds a crystalline structure
• Hemicellulose:
– Sealants and flexibilisators
– Short polysaccharide chain consisting of various sugars
• Lignin:
– Wood glue
– Filling substance in the cellulose frame
– Wood formation initiator
– Absorbs pressure, protects agains attacks
9 | Wood and Pulp | Sappi Fine Paper Europe
11. 2.1. Wood yard
Step 1
11 | Wood and Pulp | Sappi Fine Paper Europe
12. 2.2. Debarking
Step 2: Debarking drum
12 | Wood and Pulp | Sappi Fine Paper Europe
13. 2.3. Chipping
Step 3
13 | Wood and Pulp | Sappi Fine Paper Europe
14. 2.4. Defibring
Step 4
14 | Wood and Pulp | Sappi Fine Paper Europe
15. 2.4.1. Mechanical vs. chemical pulp
Mechanical pulp Chemical pulp
Cost Low High
Yield High: approx. 90% Low: approx. 50%
Chemicals Few Many (re-usable >99%)
Energy Intensive Energy generation
Brightness Low High
Yellowing High Low
Opacity High Low
Stiffness Low High
15 | Wood and Pulp | Sappi Fine Paper Europe
16. 2.4.2. Mechanical pulp
Wood containing
• Stone groundwood (SGW)
– Developed1843 by F. G. Keller
– No pre-processing
– Processing under atmospheric pressure and temperature
– Yield: 90-95% All wood components are fully maintained
• Brown groundwood
– Vaporization before grinding
– Fibres have brownish colour
– Yield: <90% But better stiffness
• Pressurized groundwood (PGW)
– Processing under pressure (2 to 4.5 bar) and high temperature (110-135°C)
• Chemical groundwood (CGW)
– Chemical pre-processing
– Lignin is partially removed Low yield
16 | Wood and Pulp | Sappi Fine Paper Europe
17. 2.4.2. Mechanical pulp
(Chemi) Thermo Mechanical Pulp
• TMP
– Wood chips are vaporized
– Chips are ground down to single fibres in refiners, under vapour pressure
• CTMP
– Wood chips are impregnated (mixed with a chemical substance)
– Cooked
– Ground
– Bleached
17 | Wood and Pulp | Sappi Fine Paper Europe
18. 2.4.2. Mechanical pulp
(Chemi) Thermo Mechanical Pulp
T: light cooking of
C: chemical woodchips
impregnation
of woodchips
P: pulp
ready for
bleaching
M: mechanical refining
18 | Wood and Pulp | Sappi Fine Paper Europe
19. 2.4.3. Chemical pulp
• Purpose:
– Stripping and dissolving lignin
Lignin is what holds the individual fibres together
– Maintaining the cellulose fibre structure
• In practice:
– Only residual lignin remains
– Hemicelullose and cellulose are also partially removed
– Yield is approx. 50% (mechanical pulp approx. 90%)
• Main types:
– Sulphate pulp
– Sulphite pulp
19 | Wood and Pulp | Sappi Fine Paper Europe
20. 2.4.3. Chemical pulp
Sulphate pulp Sulphite pulp
(kraft pulp)
Cooking time 1-2 hours 3-8 hours
Temperature 170-180°C 130-140°C
pH-value 13+ (alkaline) 1-2 (acidic)
Yield 45-50% 50-55%
Stiffness High Low
Fibres assailed from outside Fibres assailed from within
Raw materials Flexible Limited
Cost High Low
Odour Heavy Neutral
20 | Wood and Pulp | Sappi Fine Paper Europe
21. 2.4.3. Chemical pulp
Sulphate pulp
• Developed 1879
– 80 – 85 % of all pulp production worldwide
• Basic materials:
– Roundwood and wood chips
• Alkaline cooking process: pH value 11
• Special features:
– Suitable for all wood types, including annuals
– Obligatory recycling of used chemicals
– Energy generation from burnt waste
21 | Wood and Pulp | Sappi Fine Paper Europe
22. 2.4.3. Chemical pulp
Sulphite pulp
• Developed 1876 - 1878
– 15 – 20 % of all pulp production worldwide
• Basic materials:
– Roundwood and wood chips
• Acidic cooking process: pH value 4
– Cooking time 3-8 hours in sulphurous acids (magnesium bisulphite)
– Lignin is washed out in acidic environment
– Defibring under pressure at 130-145°C
– Requires high quality wood
– Yield approx. 55%
• Special features:
– Not suitable for resinous wood types (pine)
– Recent regulations make recycling of used chemicals obligatory
22 | Wood and Pulp | Sappi Fine Paper Europe
23. 2.4.3. Chemical pulp
Sulphite pulp
Advantages Disadvantages
Cost-effective use of small units from Limited raw material base
Sulphite: 100,000 tons per year
Sulphate: 500,000 tons per year
Good yield Bark sensitive
Good bleaching characteristics Low stiffness
High basic whiteness High burden on waste water
Sulphite: greyish white / Sulphate: brown
23 | Wood and Pulp | Sappi Fine Paper Europe
24. 2.5. Measurement data
Pulp hardness Kappa Residual lignin
Very soft 0.5 – 1 1.5%
Soft 11 – 15 1.5 – 2.5%
Normal 23 – 31 3.0 – 4.0%
Hard 46 – 54 6.0 – 7.0%
Very hard 54 – 69 7.0 – 9.0%
24 | Wood and Pulp | Sappi Fine Paper Europe
25. 2.6. Bleaching
• Modification of coloured substances in the pulp
– Coloured substances lose the ability to fully absorb light
– Residual lignin and other undesired substances are removed
Cooking O₂ Bleaching
25 | Wood and Pulp | Sappi Fine Paper Europe
26. 2.6. Bleaching
• Intermediate washing phases during chemical treatment
First washing phase Last washing phase
26 | Wood and Pulp | Sappi Fine Paper Europe
27. 2.6.1. Bleaching methods
• Pulp can be bleached with:
– Elemental chlorine and chlorine dioxide
In the past Highly negative effects on the environment
Modern ECF/TCF pulp Elemental Chlorine Free/Totally Chlorine Free
– Ozone (O3) and oxygen (O₂) in various forms
Resulting paper is virtually odour free
Sappi was the first paper producer to use the „Sapoxal oxygen bleach process“
– Hydrogen peroxide (H₂O₂)
Components: caustic soda, water glass, sulphuric acid
Oxidative process: metal + oxygen is converted to metal oxide
– Natriumdithionit (NaS₂O4)
Reductive process: metal oxide is dissolved into metal + oxygen
27 | Wood and Pulp | Sappi Fine Paper Europe
28. 3. Overview pulp factory Sappi Gratkorn
28 | Wood and Pulp | Sappi Fine Paper Europe
29. Thank you
for your attention
Jörg Abelmann
29 | Wood and Pulp | Sappi Fine Paper Europe