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We accept the challenge!www.andritz.com Thomas Oswald
Comparison of different conceptsNew technologies for drying sections
2 New technologies for drying sections, DITP 2011
New technologies for drying sections
Case study contact drying
Cast cylinder
Steel cylinder
High temperature cylinder
Case study impingement drying
Indirect
Direct
Double sided
Summary
Contents
3 New technologies for drying sections, DITP 2011
Drying sectionLayout for case studies
Vacuum cylinder
Single tier Double tier
Basis weight: 36 g/m²
Machine speed: 1600 m/min
after Press: 43 %
4 New technologies for drying sections, DITP 2011
New technologies for drying sections
Case study contact drying
Cast cylinder
Steel cylinder
High temperature cylinder
Case study impingement drying
Indirect
Direct
Double sided
Summary
5 New technologies for drying sections, DITP 2011
Cast cylinderSimulation result
Cylinder No.Sheet thicknessz - Direction [mm]
Shee
t Tem
pera
ture
[°C
]
6 New technologies for drying sections, DITP 2011
New technologies for drying sections
Case study contact drying
Cast cylinder
Steel cylinder
High temperature cylinder
Case study impingement drying
Indirect
Direct
Double sided
Summary
7 New technologies for drying sections, DITP 2011
50
55
60
65
70
75
80
85
90
95
100
40 50 60 70 80 90 100
Sheet Dryness [%]
Shee
t Tem
pera
ture
[°C
]
Steel Cast
Steel cylinderComparison sheet temperature vs. sheet dryness
Δ Sheet Dryness
8 New technologies for drying sections, DITP 2011
Steel cylinderComparison of drying rates from simulation
Reference for steel cylinder rebuild: German board mill, installed in 07/2011
16.7
17.8
16
16.2
16.4
16.6
16.8
17
17.2
17.4
17.6
17.8
Dry
ing
Rat
e [k
g/m
²h]
Cast Steel
9 New technologies for drying sections, DITP 2011
New technologies for drying sections
Case study contact drying
Cast cylinder
Steel cylinder
High temperature cylinder
Case study impingement drying
Indirect
Direct
Double sided
Summary
10 New technologies for drying sections, DITP 2011
High temperature cylinder
Labor arrangement Pilot plant
Test arrangement
Pneumaticcylinder
Pneumatic cylinder
Pneumatic cylinder
Heated platen
Heated platen
Drying Station #1
Paper
Drying Station #2
11 New technologies for drying sections, DITP 2011
High temperature cylinder
0
20
40
60
80
100
50 100 150 200 250
Cylinder Surface Temperature [°C]
Dryi
ng R
ate
[kg/
m²h
]
36g/m² 48g/m² 100g/m²
Labor arrangement Pilot plant
Results drying rates form tests
0
20
40
60
80
100
50 100 150 200 250
Cylinder Surface Temperature [°C]
Dryi
ng R
ate
[kg/
m²h
]
70g/m²
12 New technologies for drying sections, DITP 2011
High temperature cylinderLayout drying section for simulation
13 New technologies for drying sections, DITP 2011
High temperature cylinderComparison sheet temperature vs. sheet dryness
50
55
60
65
70
75
80
85
90
95
100
40 50 60 70 80 90 100
Sheet Dryness [%]
She
et T
empe
ratu
re [°
C]
All Steel All Cast 4x High Temperature + Cast
14 New technologies for drying sections, DITP 2011
0
10
20
30
40
50
60
70
80
90
100
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42
Cylinder No.
Shee
t Dry
ness
[%]
All Cast All Steel 4x High Temperature + Cast
High temperature cylinderComparison sheet dryness
2
7
15 New technologies for drying sections, DITP 2011
High temperature cylinderComparison drying rates from simulation
Reference: PM2, Corrugated Services Inc., Forney, Texas
16.7 17.8
72.9
0
10
20
30
40
50
60
70
80D
ryin
g R
ate
[kg/
m²h
]
Cast Steel High Temperature
16 New technologies for drying sections, DITP 2011
New technologies for drying sections
Case study contact drying
Cast cylinder
Steel cylinder
High temperature cylinder
Case study impingement drying
Indirect
Direct
Double sided
Summary
Drying Fabric
Cylinder
Paper
Indirect Impingement
17 New technologies for drying sections, DITP 2011
Impingement indirectLayout drying section for simulation
18 New technologies for drying sections, DITP 2011
50
5560
65
70
75
8085
90
95
100
40 50 60 70 80 90 100
Sheet Dryness [%]
Shee
t Tem
pera
ture
[°C
]
All Cast 2x Indirect + Cast
Impingement indirect Comparison sheet temperature vs. sheet dryness
Δ Sheet Dryness
19 New technologies for drying sections, DITP 2011
Impingement indirectComparison drying rates from simulation
16.7
32.2
0
5
10
15
20
25
30
35
Dry
ing
Rat
e [k
g/m
²h]
Cast Cast + Indirect
20 New technologies for drying sections, DITP 2011
New technologies for drying sections
Case study contact drying
Cast cylinder
Steel cylinder
High temperature cylinder
Case study impingement drying
Indirect
Direct
Double sided
Summary
Drying Fabric
Paper
Direct Impingement
21 New technologies for drying sections, DITP 2011
Impingement directLayout drying section for simulation
22 New technologies for drying sections, DITP 2011
Impingement directComparison sheet temperature vs. sheet dryness
50
55
60
65
70
75
80
85
90
95
100
40 50 60 70 80 90 100
Sheet Dryness [%]
Shee
t Tem
pera
ture
[°C
]
2x Indirect 2x Direct
23 New technologies for drying sections, DITP 2011
Comparison drying rates from simulationImpingement direct
16.7
32.2
80.3
0
10
20
30
40
50
60
70
80
90
Dry
ing
Rat
e [k
g/m
²h]
Cast Cast + Indirect Direct
24 New technologies for drying sections, DITP 2011
New technologies for drying sections
Case study contact drying
Cast cylinder
Steel cylinder
High temperature cylinder
Case study impingement drying
Indirect
Direct
Double sided
Summary
Drying Fabric
Paper
Double Sided Impingement
25 New technologies for drying sections, DITP 2011
Impingement double sided
Pilot machine
Test arrangement
Impingement dryer
26 New technologies for drying sections, DITP 2011
Impingement double sidedResults
0
20
40
60
80
100
120
140
200 220 240 260 280 300 320 340 360
Impingement Temperature [°C]
Dry
ing
Rat
e [k
g/m
²h]
27 New technologies for drying sections, DITP 2011
Impingement double sidedLayout drying section for simulation
28 New technologies for drying sections, DITP 2011
0
10
20
30
40
50
60
70
80
90
100
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42
Cylinder No.
She
et D
ryne
ss [%
]
All Cast 2 x Indirect + Cast 2 x Direct + Cast 2 x Double Sided + Cast
Impingement double sidedComparison sheet dryness
16
10
29 New technologies for drying sections, DITP 2011
Impingement double sidedComparison drying rates from simulation
32.2
80.3
133.3
0
20
40
60
80
100
120
140D
ryin
g R
ate
[kg/
m²h
]
Cast + Indirect Direct Double Sided
30 New technologies for drying sections, DITP 2011
Sheet drynessDifferent positions of double sided impingement
0
10
20
30
40
50
60
70
80
90
100
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42
Cylinder No.
Shee
t Dry
ness
[%]
Cast In the Middle After Press
31 New technologies for drying sections, DITP 2011
New technologies for drying sections
Case study contact drying
Cast cylinder
Steel cylinder
High temperature cylinder
Case study impingement drying
Indirect
Direct
Double sided
Summary
32 New technologies for drying sections, DITP 2011
Comparison all drying rates from simulation
16.7 17.8
72.9
32.2
80.3
133.3
0
20
40
60
80
100
120
140
Dry
ing
Rat
er [k
g/m
²h]
Cast
Steel
High Tempera
ture
Cast +
Indire
ct
Direct
Double Sided
33 New technologies for drying sections, DITP 2011
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© ANDRITZ AG 2011. All rights reserved. No part of this copyrighted work may be reproduced, modified or distributed in any form or by any means, or stored in any database or retrieval system, without the prior written permission of ANDRITZ AG or its affiliates. Any such unauthorized use for any purpose is a violation of the relevant copyright laws.
We accept the challenge!www.andritz.com Thomas Oswald
Comparison of different conceptsNew technologies for drying sections
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