0404000 dryer section
TRANSCRIPT
VKPC – PM#1
Training
Dryer Section
Introduction
1. Introduction Trainer
2. Training Schedule
Introduction of the Trainer
Satoshi Seki
Paper Machine Engineering Dept.
Training Schedule
Training Time
Breaks
Lunch
Question and Answer
Technical Data
1. Basic Design Data2. Technical Specification
Basic Design Data – Layout data
Design widthWire width 5.950 mmUntrimmed paper width on pope 5.300 mm
Basis weightT1 (Pulp on Top) 125 - 275 gsmT2 (100% OCC) 125 - 250 gsmCM 105 - 125 gsm
Design production At PM reel max. 744 to/24hWith efficiency 100%Moisture at reel 8%Basis weight 125 gsm (Reference liner grade)
Paper Grade Liner Board (Test Liner: T1, T2)Corrugating Medium
Basic Design Data – Layout data
Reel spoolMax. parent reel diameter: 3.000 mm
Hand of machineStanding at the headbox facing the reel: Drive on right hand side
Operating speedProduction speed range 355 - 800 m/minDrive speed 900 m/minDesign speed 900 m/minBalancing speed 900 m/min
Technology
1. Fundamental - Function of Dryer Section 2. Key Technology – Innovation
Function of the Dryer Section
1. Drying of the paper / Evaporation of Water
2. Runnability / Efficiency
3. Paper Quality
Overview of Paper Machine
Wire SectionPress Section
Hard Nip Calender
Reel Dryer Section
Press Outlet Dry Content
48%
Dry Content 92%
Key Technology – Innovation of Dryer Section
DuostabilizerBlow Doctor Transfer Foil Silent Drive
Components
1. Dryer Groups 2. Dryer Cylinder 3. Canvas Roll & Paper Roll 4. DuoStabilizer5. Canvas Guide & Run Warning Device6. Canvas Strecher 7. Blow Doctor & Hot Air Blow Pipes8. Tail Cutter
Description - Dryers in the dryer groups
Item Component Description
1 Dryer group 1 6 dryers, single row (dryers nos. 1 to 6)
2 Dryer group 2 15 dryers, double row (dryers nos. 7 to 21)
3 Dryer group 3 14 dryers, double row (dryers nos. 22 to 35)
Description – Dryer Group 1
1 Dryer 6 Single drive via gear casing for drying cylinders 11 Guide roll2 Take-off doctor 7 Canvas changing device 12 Transfer foil3 Drilled canvas roll 8 Stretch roll 13 Dryer fabric roll4 Upper blow doctors 9 Canvas stretcher 14 Rope stretcher5 Duostabilizer 10 Canvas guide unit
Guide Roll
Drilled Canvas RollBlow Doctor
Duostabilizer
Transfer Foil
Canvas Stretcher
Description – Dryer Group 2
1 Dryer 6 Single drive via gear casing for drying cylinders 11 Guide roll2 Duostabilizer 7 Canvas changing device 12 Canvas roll3 Drilled canvas roll 8 Stretch roll 13 Canvas roll (With drive shaft)4 Upper blow doctor 9 Canvas stretcher 14 Canvas roll (inside)5 Lower blow doctor 10 Canvas guide unit 15 Rope stretcher
Blow Doctor
Duostabilizer
Drilled Canvas Roll
Description – Dryer Group 3
1 Dryer 6 Single drive via gear casing for drying cylinders 11 Guide roll2 Upper blow doctor 7 Canvas changing device 12 Canvas roll3 Lower blow doctor 8 Stretch roll 13 Canvas roll (with drive shaft)4 Take-off doctor 9 Canvas stretcher 14 Paper roll5 Tail cutter 10 Canvas guide unit 15 Rope stretcher
Blow Doctor
Dryer Cylinder
Locating bearing Floating bearing
Steam
Condensate
Paper Width
Picture - Dryer Bearing Tender Side
Picture - Dryer Bearing Drive Side
Thermorim inside of Dryer CylinderDryer No #4-35 (32 Thermorims)
Task
Higher Turbilence in the condensate later, and Higher heat
Higher production by increasing Drying capacity
Quality improvement by increasing uniformity of Moisture profile
Thermorim inside of Dryer CylinderDryer No #4-35 (32 Thermorims)
Spoiler Bar
Spring RingSpring Ring
Spoiler Bar
Steam Joint
The Steam Joint supplies Steam into the dryer
and discharges the created condensate.
Steam
CondensateGap 5mm
Steam Joint
Steam Inlet Head
Condensate Discharge Head
Siphon
Cylinder Journal
Bearing Housing
Carbon Sealring
Enlarged view of Siphon
Condensate
Function
Steam
Condensate
Canvas Rolls – Four Types
Canvas roll
Canvas roll, with drive shaft
Canvas roll, shortened
Canvas roll, with free sheave used inlet 1st dryer group
inside the machine beam
For driven canvas rolls
Paper Roll
Paper Roll
Dryer SectionCalender
Transfer Foil
Press SectionDryer Section
DuoStabilizer
Pick upzone
Supporting zone
Drilled roll
Duo-Stabilizer
DynaSeal contactless sealing
Operating position
Changingposition
1 web pick-up from dryeradhesion forces, vacuum forces--> web adheres to dryer
1
2
3
4
2 run onto leading rollcentrifugal forces--> web lifts off dryer fabric
3 lower apex area of the rollcentrifugal forces,dead weight forces--> web lifts off
4 run onto dryerelongated paper--> wrinking (edge)
Web Run Problems
Picturte - DuoStabilizer
DuoStabilizer (Cross Section A-A)
DSAir sealing
TSAir sealing
Vacuum source
A
A
SupplyAir
3
Sealing Blades to the drilled Roll
Description – Canvas Guide
1 Palm unit2 Pneumatic cylinder3 Bearing support 4 Dryer−canvas runout alarm5 Guide roll
1. One palm unit each (1) and one canvas run out alarm (4) are mounted at the canvas edges on front side and on drive side.
2. When the dryer canvas runs centrically to the machine, the canvas run out alarm (4) are not touched by the dryer fabric.
3. When the canvas runs out, the palm unit (1) follows the canvas edge and activates the pneumatic cylinder (2).
4. The pneumatic cylinder (2) moves the bearing support (3) of the guide roll (5) and returns the canvas into the mid−position.
5. If the canvas runs out beyond the tolerance range of the guide assembly, this is signaled by the canvas run out alarm (4).
Palm Unit
Canvas Run Out Alarm
• Pneumatic Cylinder
• Bearing Support
• Base
• Bearing arm
• Base adjustment
by hand wheel
Consisting of:
Canvas Guide Assembly
Palm Unit
Palm
Rotary Piston
Regulator
Counter Weight
Description – Canvas Run Warning Device
1 Canvas run warning device2 Sensor 3 Canvas
1. If the crosswise run of the dryer canvas exceeds the tolerance range, electromechanical sensors (2) on the drive and front side indicate this.
2. If the dryer canvas stays within the tolerance range, the sensors (2) do not touch the edge of the canvas (3).
Sensor
Canvas
Description – Canvas stretcher
1 Stretcher rail2 Holder3 Dryer stretcer roll4 Canvas5 Pneumatic cylinder6 Chain7 Wire rope8 Winch9 Wire drum
1. The drying canvas (4) are tensioned by pneumatic cylinder (5).2. The canvas tension is controlled by air pressure of pneumatic cylinder (5).3. Pneumatic cylinder (5) pull the wire rope (7) ,and give the rotation to the wire drum (9). 4. And then give the required canvas tension to the dryer stretch roll (3) mounted in a
holder (2) on the stretcher rail (1) by through the chain (6).5. The winch (8) winds up an extra wire rope.
Chain
Wire Rope
Pneumatic Cylinder
Winch
Description – Rope Stretcher
1 Rope 2 Idler pulley3 Pneumatic cylinder
1. The rope (1) is tensed by a pneumatic cylinder (3), and idler pulleies (2).
2. The retraction force at the pneumatic cylinder (3) can be adjusted via pressure control valves.
3. To change the ropes, the pneumatic cylinders (3) can be run in and out via locally mounted hand valves.
Rope
Pneumatic Cylinder
Idler Pulley
Picture – Rope Stretcher
Enlarged View of Idler Pulley
Description – Rope Tension
Rope Stretcher
0
100
200
300
400
500
600
700
800
0 0.1 0.2 0.3 0.4 0.5
Air Pressure（MPa)
Ro
pe
Te
nsi
on （
N）
Air Pressure vs Rope Tension
Blow Doctor & Hot Air Blow Pipes
Hot and dry air is supplied by• Blow Doctor • Hot air blow pipes
The hot and dry air supports the drying process, by carrying the moisture, coming out of the drying paper web, away.
Blow Doctor
Blow Pipe
TaskThe hot−air blow pipe (1) supplies air to the dryer section which absorbs the water vapor, which collects in the top dryer fabric loop.
Hot Air Blow Pipe
Dryer Cylinder
Hot air blow pipe
Hot Air Blow Pipe – ArrangementQuantity : 10 sets
Tail Cutter
Tail Cutter
Tail Cutter – Blade
Description – Device for changing upper canvas
1 Tightening nut 4 Handrail 7 Rail2 Bearing cover 5 Support 8 Pneumatic motor3 Unwinding shaft 6 Platform 9 Winding shaft
1. A reeling and unwind device with an accessible platform (6) (to close the canvas seam), are installed for changing the dryer fabrics in the upper canvas run.
2. The rail(7) to draw in the canvas is set up on the platform (6).
3. When closing the canvas seam, the pivoted handrail (4) are used to prevent both end of canvas seam divided from slipping down.
4. The pneumatic motor (8) is attached to wind up the old canvas and to run out the new at the same time.Pneumatic
Motor
New Canvas Old Canvas
See VideoDuoStabilizer
See VideoSteam and Condensate
Operation
1. Operation & Setting2. Start3. Stop
Things to for after before Start Up
Are the Dryer Section free from waste paper and dirt?
Is the Canvas tension on set levels?
Are the Dryer fabrics in good condition ?
(no excessive wear or contamination)
Is there nothing in contact with the Dryer fabrics?
Is the Central Oil Lubrication activated?
Are the draw settings in place?
Are the Doctor blades inserted all and no wear ?
Are the canvas guide units ready for operation ?
Start Dryer Section
Dryer Section to Crawl mode
Hood & Air System
Heat up (S&C system)
Dryer Section to operation speed
Pre-production Check list
&
Central Oil Lubrication on
Pneumatic Airsystem on
Dryer Section de-coupled from press section
All manual Drive Interlocks Removed
Start production
Transferring Paper Web
Prerequisite1. Paper web knock-off completed successfully, Paper web runs sturdily into press Pit.2. Dryer section cleaned from waste paper3. All doctors of dryer section pressed on4. Tail squirt is set to a tail width of 100 to 200 mm5. Reel Pit at the end of the dryer section is ready condition6. All drives including rope drives on operation speed7. Steam system is on break set point value
Action 1. Transfer tail transfer into rope nip by means of hand lance. Tail is leaded through the dryer section by the rope carrier system.2. Observe tails through the dryer section. Tail runs in Reel pit.3. Set tail squirt to full width.4. Steam system of Dryer section runs at operation setting value.5. Paper web runs across the width of the machine into the dryer section.6. Web runs stably at Reel pit.
Shutting down the Dryer Section (I)
Knock off the Paper webClose the main steam line. Open the hood on front side, drive side and basementTurn off the hot air supplySwitch off the dryer fabric cleaning unitsSet the exhaust-air fans to full speedLet the dryers run for 30 min. at machine speedCheck uniform condensate dischargeCheck the power input (any condensate left?)
Shutting down the Dryer Section (II)
Continue rotating the dryers at crawl speed, until they are cooled down to 60˚C
Turn the dryer drives off Allow the central oil lubrication system to continue running for
about another 2 hours Turn off the hood deaeration Turn off all other units Slacken the dryer fabric for a long shutdown
Operation – Canvas tension for 1st group
1st Group
2000mm
1500mm
1000mm
0.0
1.0
2.0
3.0
4.0
5.0
0 0.1 0.2 0.3 0.4 0.5
Air Pressure(MPa)
Ca
nva
s T
en
sio
n(k
N/m
)
Operation – Canvas tension for 2nd, 3rd group (Top)
2nd and 3rd Group Top
2000mm
1500mm
1000mm
0.0
1.0
2.0
3.0
4.0
5.0
0 0.1 0.2 0.3 0.4 0.5
Air Pressure(MPa)
Ca
nva
s T
en
sio
n(k
N/m
)
Operation – Canvas tension for 2nd, 3rd group (Bottom)
2nd and 3rd Group Bottom
2000mm
1500mm
1000mm
0.0
1.0
2.0
3.0
4.0
5.0
0 0.1 0.2 0.3 0.4 0.5
Air Pressure(MPa)
Can
vas
Ten
sion
(kN
/m)
1st Dryer Operation Panel
1st Dryer Operation Panel
1D Pneumatic Valve Stand
1D Operation Panel & 1D Pneumatic Valve Stand Piping Diagram (1)
Solenoid Valve
Pressure Regulator
Filter
Speed Controller
Needle Valve
Canvas Guide Canvas Stretcher
1D Operation Panel & 1D Pneumatic Valve Stand Piping Diagram (2)
2D Pneumatic Valve Stand
2D Pneumatic Valve Stand Piping Diagram (1)
2D Pneumatic Valve Stand
2D Pneumatic Valve Stand Piping Diagram (2)
Doctor Lifting
2nd – 3rd Dryer Operation Panel
2nd – 3rd Dryer Operation Panel
2nd – 3rd Dryer Operation Panel
3D Pneumatic Valve Stand
2,3D Operation Panel & Pneumatic Valve Stand Piping Diagram (1)
Needle Valve
Pressure Regulator
Filter
Speed Controller
2,3D Operation Panel & Pneumatic Valve Stand Piping Diagram (2)
Solenoid Valve
Pressure Regulator
Filter
Speed Controller
Canvas Stretch
#35 Doctor Nip
2,3D Operation Panel & Pneumatic Valve Stand Piping Diagram (3)
Doctor Lifting
Tail Cutter Pneumatic Valve Stand – Overview
Tail Cutter Pneumatic Valve Stand Piping Diagram (1)
Tail Cutter Traverse
Tail Cutter
Rotate Tail Cutter
Lifting Guide Bar
Lifting Solenoid Valve
Pressure Regulator
Filter
1,2,3D Rope Stretcher Panel - Pneumatic Valve Stand Piping Diagram
Operation – Inserting canvas roll
1 Tightening nuts 4 Run-in and run-out trolley2 Bearing cover 5 canvas roll3 Support
1. Open the bearing cover (2) on the front and drive side by slackening the tightening nuts (1).
2. Using the vapour hood travelling crane, place the canvas roll (5) in the support (3).
3. Close bearing cover (2) on front and drive side.
4. Remove both run-in and run-out trolley (4) from the rails.Pneumatic
Motor
New Canvas Old
Canvas
Operation – Preparing the dryer canvas
1 Old canvas
2 Winding shaft
3 Threading aids
4 New canvas roll
5 Ropes
6 Hand rails
1. Perforate old dryer canvas (1).2. Open the wire seam.
New Canvas
Drive
1. Silent Drive2. Properties of Silent Drive3. Drive Arrangement
Silent Drive (for two-tier dryer group)
Standard drive concept with gear-train drive:Driven dryers are used to pull several dryers.
Drive concept with Silent Drive:
Driven dryer fabric rolls areused to pull 2 dryers each.
Silent Drive
The 1st dryer of the 1st dryer group is equipped with a single drive, due to the higher doctoring work and as the web is still very moist. Dryers with small wrap angles are equipped with single drives,
due to the risk of slipping.
Silent Drive is used as complete solution throughout the dryer section, but also in combination with single drives and gear-trains.
Silent Drive - System properties (1)
Gear-trains with gear wheels are omitted → Improved space conditions at drive-sided framing
No gears → Low-noise overall system, gear lubrication omitted
No power loss of gears → Enhanced overall efficiency, reduced power consumption No oil leakage → Less soiling, reduced risk of fire
Silent Drive - System properties (2)
No influence of dryer diameter tolerances → Reduced loads on web, higher runnability
The mechanically overdetermined system that connects the dryers through dryer fabric and gears is omitted. → Silent Drive resulting in defined dryer fabric tension between dryers
Several drive spots → Influencing accessibility to drive side
Silent Drive - System properties (3)
More demanding control system, since several drives in each
dryer group → State-of-the-art technology by suppliers of electric drives Fewer mechanical components → Lower maintenance
Open framing on tending and drive sides → Symmetric air flow, improved pocket ventilation, improved CD moisture profile
Drive Arrangement
Legend
Double Tier
Double Tier
Single Tier
Maintenance
1. Roll List
2. Lubrication
3. Dryer Cylinder
4. Roll Changing
5. Bearings
Roll List
Roll List
Lubrication List
Lubrication No
Lubrication List Lubrication No
Roll Changing (1)
Travelling Rail (MD)
Cross Rail (CD)
Roll Changing (2)
Dryer Cylinder
Roll run-out device
Dolly
Roll Changing (3)
Canvas Roll
Car Unit
Bearings for cylinders and rolls
Item Components Description
1 Bearings for drying cylinders on the front side CARB roller bearing as floating bearing
2 Bearings for drying cylinders on the drive sideSelf-aligning roller bearings as locating bearings in the pillow block housing
3Bearings for drying cylinders with separate drive on the drive side
Self-aligning roller bearings as locating bearings in the transmission housing
4 Bearings for drilled canvas rollSelf-aligning roller bearings as locating bearings in the pillow block housing
5 Bearings for canvas rollsSelf-aligning roller bearings as locating bearings in the pillow block housing
6 Bearings for paper rollsSelf-aligning roller bearings as locating bearings in the pillow block housing
7Bearings for drive gear for in drive shaft of separate drive on the drive side
Cylinder roller bearings NU 2218EC
Self-aligning roller bearings24122 CC/C3 W33
Oil level
Lube hole
Self-Aligning Roller Bearing
参考資料
Mounting of Anti-Friction Bearing
参考資料
Installation aid
Groove for oil outlet
Dryer bearing single drive Dryer bearing drive sidePlummer block
Mounting of Anti-Friction Bearing
参考資料
Push-on Distance
Zero position
Start position
End position
Ss
S
参考資料
Dryer bearing single drive Dryer bearing drive sidePlummer block
Mounting of Anti-friction Bearing
参考資料
Axial retainer foranti-friction bearing
Mounting of Anti-Friction Bearing
参考資料
With single drive Without drive
Oil inlet
Oil outlet
Oil inlet
Oil outlet
Oil inlet
Dryer Bearing DS
参考資料
Dryer Bearing TS
Oil inlet
Oil outlet
参考資料
Position of the installed bearing
Mounting of CARB-Bearing
参考資料
Z = X - 147
Alignment of Dryer
5参考資料
Dismounting of Anti-Friction Bearing
参考資料
Single Drive - Gearbox for Drying Cylinder
Design “A”
参考資料