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  • Long grinders as you know them from Austria and the Finish facility Did some work for Metso for Abitibi Clermont and also Bowater Gatineau
  • Long grinders as you know them from Austria and the Finish facility Did some work for Metso for Abitibi Clermont and also Bowater Gatineau
  • clearly shown the compact design: each roll with seperate bearings, connected only by the locks advantages: no need of a big framing, good accessibility, no influence of the roll´s bending but: huge demands on the locks, charged with up to 600 tons.

0403000 press sectionr Presentation Transcript

  • 1. VKPC – PM#1 Training Press Section
  • 2. Introduction 1. Introduction Trainer 2. Training Schedule
  • 3. Introduction of the Trainer
    • Takeshi Nonogaki
    • Paper Machine Engineering Dept.
  • 4. Technical Data 1. Basic Design Data 2. Technical Specification
  • 5. Basic Design Data – Layout data 5.300 mm Untrimmed paper width on pope 5.950 mm Wire width Design width 105 - 125 gsm CM 125 - 250 gsm T2 (100% OCC) 125 - 275 gsm T1 (Pulp on Top) Basis weight 125 gsm (Reference liner grade) Basis weight 8% Moisture at reel 100% With efficiency max. 744 to/24h At PM reel Design production Liner Board (Test Liner: T1, T2) Corrugating Medium Paper Grade
  • 6. Basic Design Data – Layout data 3.000 mm Max. parent reel diameter: Reel spool Drive on right hand side facing the reel:   Standing at the headbox Hand of machine 900 m/min Balancing speed 900 m/min Design speed 900 m/min Drive speed 355 - 800 m/min Production speed range Operating speed
  • 7. Technology
    • Functions of the Press Section
    • Optimization of Paper Quality
    • Trouble shooting
  • 8. Functions of the Press Section See Animation
      • Mechanical removal of water
      • Determination of surface properties
      • Influence bulk
      • Increase wet web strength
      • Maximum runnability
      • Maximum availability
  • 9. Optimization of Paper Quality
      • Moisture cross profile
      • Twosidedness
      • Roughness
  • 10. Moisture Cross Profile
      • It is possible, that the moisture cross profile is not satisfying after the wet end of the machine Possible reasons:
        • HP/LP-Nozzles blocked
        • Felt condition uneven
        • Catch pans are overflowing
        • Uhlebox dewatering is uneven
        • Hydrostatic press shoe hydraulics are malfunctioning
        • Press shoe is damaged
        • Felt design unsuitable for machine
        • Optimize void volume of sleeve
  • 11. Twosidedness and Roughness
      • Twosidedness and Roughness can be influenced slightly through shifting the press loads from the first to the second press or visa versa
      • The main influencing factor though is the design of the press felt:  All successful machines have gone through an optimisation process  In this process a compromise between surface characteristics, dry content and runnability has to be found
  • 12. Optimization of Press Section: General Hints
      • Check felt tension with hand measurement device
      • Use HP-shower for felt conditioning according your own experience
      • Use schedule for HP-shower for roll cleaning
      • Adjust vacua in uhle boxes according felt life time
  • 13. Trouble shooting – Dryness after Press too low
    • Possible causes:
    • Dryness after Former too low
    • Temperature of the pulp too low
    • Pulp too strong beaten
    • Deflector Stripes not in ideal position
    • Line force too low
    • Steam blow box not in operation
    • Press roll storage volume dirty
    • Problems with the felts (see next slide)
  • 14. Trouble shooting – Dryness after Press too low
    • Possible causes (Felt & Feltconditioning):
    • Structural resistance of the felt too high
    • To high re-moisturization
    • Needleing inhomogeneous
    • Too fine felts
    • Too light basis weight of felt
    • End of felt life time
    • New felt: Nip-dewatering has not startet
    • Filler content too high in the felts
  • 15. Trouble shooting – Edge Trim follows the Felt
    • Possible causes:
    • Felt too smooth in the edge section
    • Edge moisture too high
    • Pick-up suction roll holes plugged in the edge section
    • Edge trim too narrow
    • Trim-Guard settings false
  • 16. Components
    • Rolls
    • Equipment
    • Shower
    • Movement
    • Detail
        • ZZ box
        • NipcoFlex Press
    • Hydraulic system
    • Pneumatic system
    • C & I
  • 17. Rolls NipcoFlex-Roll Press Roll Suction Roll Felt Roll
  • 18. Equipment Stretcher Guide Zig-zag Suction Box Transfer Suction Box Doctor
  • 19. Shower Oscillating high- pressure Shower for felt cleaning Shower for felt edge moistening unit Low-pressure shower for roll cleaning Chemical shower Internal pick-up suction roll shower Oscillating high- pressure shower for roll cleaning Low-pressure shower (Doctor) Moistening Transfer Box
  • 20. Movement Top roll lifting (for sleeve, felt changing) Pick up roll lifting Lead-out roll lifting (for paper threading) Lead-in roll lifting (for felt changing) Lead-out roll lifting (for adjusting)
  • 21. ZR-Oxid ZIG-ZAG Uhle Box Cover
    • Extends Felt Life
    • Improves Felt Cleaning
    • Reduces Drag Load
    • Improves Moisture Profile
    • Adjustable Slot Width
  • 22. Zig-Zag Cover
  • 23. Zig Zag operational sequence ZIG ZAG
  • 24. Zig Zag operational sequence ZIG ZAG
  • 25. Demonstration of Constant Slot Width in MD
  • 26. The NipcoFlex Roll Click on the Picture for Animation
  • 27. Cross Section of the NipcoFlex Roll
  • 28. Cross Section of the NipcoFlex Roll pressure shoe loading element cooling oil distributor pressure oil oil return lubricating and cooling oil press sleeve sleeve guide bars beam (cast iron)
  • 29. Longitudinal Section of the NipcoFlex Roll Tender side Drive side Return spring Press sleeve Edge loading Loading element Press shoe Beam Clamping disk Spring
  • 30. The Function of the Shoe Click on the Picture for Animation
  • 31. Blower Unit of the NipcoFlex Roll
  • 32. Blower Unit of the NipcoFlex Roll One Blower is in Operation One Blower is Stand-By The Blower Pressurise the NipcoFlex Roll The Motor Control Valve Limit the Sleeve Pressure Air from the NipcoFlex Roll and Fresh Air get into the Blower The Difference Pressure is used to Evacuate the Oil out of the NipcoFlex Roll Blower NipcoFlex Roll Air Inlet Filter Hand Valve Non Return Valve Silencer Motor Control Valve
  • 33. The Function of the Blower Unit Click on the Picture for Animation
  • 34. Internal Pneumatic Support Strip A: Distance of Doctor Blade to Pneumatic Supporting Strip Center W: Contact Angle
    • Pneumatic supporting strip
    • Water scraper holder
    • Water scraper beam
    • Press sleeve of NipcoFlex-roll
    • Water scraper blade
  • 35. Function of the Pneumatic Supporting Strip Click on the Picture for Animation
  • 36. Flow of Forces P4.14-0065 Tender side Drive side NipcoFlex roll P ress roll Nip load
  • 37. Hydraulic Unit – Circuit Diagram Sleeve Cooling Line Lubrication Line Pressure Line Circulation Line Operation Stand-by 2P 1P
  • 38. Hydraulic Unit – Tank Unit
  • 39. Hydraulic Unit – 1P/2P Pump Unit (2pcs)
  • 40. Hydraulic Unit – Cooling Unit 1
  • 41. Hydraulic Unit – Cooling Unit 2
  • 42. Press Pneumatic Valve Stand Piping Diagram (1)
  • 43. Press Pneumatic Valve Stand
  • 44. Press – Doctor Pneumatic Valve Stand
  • 45. Press Pneumatic Valve Stand Piping Diagram (1)
  • 46. Felt Guide Panel
  • 47. 1,2P Sleeve Pressure Gauge Panel
  • 48. Operation Panel – 1P Nip Data Set
  • 49. Operation Panel – 2P Nip Data Set
  • 50. Operation Panel – Motion Monitor
  • 51. Operation Panel – Data Monitor
  • 52. Operation Panel – 1P Nip Pump
  • 53. Operation Panel – NFP Pump
  • 54. Operation Panel – Suction Pick-up
  • 55. Operation Panel – Felt Roll
  • 56. Operation Panel – Operation SW
  • 57. Operation Panel – Hydraulic Pump
  • 58. Operation Panel – Interlock
  • 59. Operation Panel – 1PTIC setting
  • 60. Operation Panel – Suction Pick-up Maintenance
  • 61. Operation Panel – 1/2P Nip Test
  • 62. Operation Panel – Alarm Data Set
  • 63. Operation Panel – Timer Data Set
  • 64. Operation Panel – PLC Input 1
  • 65. ALARM EDGE GUIDE
  • 66. TENSION CONTROL
  • 67. Operation Operation and Settings - How to use Press - How to install Sleeve - How to install Felt Start Stop
  • 68. Parts of the NipcoFlex Press 1. Shims s 3. Locks 5. Precentering device 6. Pretensioning cylinder 2. Locking clamp 4. Naming on the locks 5. 3. 4. 6. 2. 1. 7. 7. Shims t
  • 69. The roll combination P4.14-0108 The locks are inserted Hydraulic cylinder for lifting the top roll
  • 70. Adjusting the press nip for NipcoP = Ø 1480 mm 1. Shim s 3. Intermediate piece 2. Lock 4. Shim t
  • 71. Shim thickness as a funktion of Press Roll diameter (if diameter chanes more than 2mm > readjust the nip) 15 9 1480 – 1475 2 21 1454.9 - 1450 5 19 1459.9 – 1455 7 16 1464.9 – 1460 10 14 1469.9 – 1465 12 11 1474.9 – 1470 Shim thickness t [mm] Shim thickness s [mm] Diameter of Press Roll [mm]
  • 72. How to pretension the locks pretensioning cylinder precentering device
  • 73. How to close the press
    • Insert all locks according to marking on
    • the bearing support
    • Raise the NipcoFlex Roll with the pretensioning cylinders
    • (Pressure for tightening 27.7 MPa)
    • Lock the pretensioning cylinder with the lock nut
    • (turn down)
    All steps for TS and DS The press is now closed and the locks are pretensioned
    • Insert the locking clamps
  • 74. The Closed press (ready for operation)
  • 75. How to open the press The pretension of the locks has been taken away, the press is open
    • Supply the pretensioning cylinder with 30.5 MPa for loosen
    • the lock nut
    • Turn the lock nut completely upwards
    • Relive the pretensioning cylinder
    All steps for TS and DS
    • The Roll is now lowered onto the intermediate piece
  • 76. How to install the QualiFlex ™ Sleeve
  • 77. Threading/Installation device for the sleeve
  • 78. How to drape the QualiFlex TM sleeve
  • 79. Clamping Disc with segments
  • 80. Fastening press sleeve Torque for the screws 150 Nm 1. Sleeve 2. Lever 3. Clamping segment 4. Screw 5. Clamping pin
  • 81. Pull over the flap
  • 82. How to fix the sleeve step 1 step 2 step 3 .......... Segment 2 Sleeve Segment 1 turn 60 ° Segment 3 Sleeve Segment 1 Segment 2 turn 60 ° Segment 1 Sleeve turn 180 °
  • 83.
    • If damages are noticed on the guide rails they should be eliminated immediately.
  • 84.
    • The sleeve should be lifted out of the transport case on the supplied rod.
  • 85.
    • Don‘t pull the sleeve on the mounting device without the supplied rod
  • 86.
    • The sleeve must be draped for at least 24 hours
    • It is recommended to apply oil inside the sleeve
  • 87.
    • Shift the sleeve continously 10 mm per week
  • 88.
    • Check both clamping disks about the shifted way and clean the moving area frequently.
  • 89. How to install Felt
  • 90. Felt Changing 1P Top 1. All rolls are in felt changing position. 2. Use crane to put felt stretcher roll into parking support. Felt stretcher roll
  • 91. Felt Changing 1P Top 1. Remove movable platform and walkways. 2. Remove the spacer blocks.
  • 92. Felt Changing 1P Top 1. Install new felt into the decvice. Traveling device Rope (inside) Rope (inside) Rope (outside) Cramp 2. Roll off the felt loop appox. 21m. 3. Set tension rope. 4. Pull up the felt with crane. 5. Attach felt cramps. 6. Run-in the felt. Cramp Cramp
  • 93. Traveling device 1. Traveling device with disc brake 2. Traveling device without disc brake 3. Felt pole 4. Fixing bolt (M12 x 25) 5. Clamping device 6. Shackle 7. Crane hook 1. Insert the felt traveling-in device into both sides of felt pole. 2. Fasten fixing bolts (4) 3. Tighten the clamping device (5) 4. Connect the traveling in device to crane hook using shackle and slings on the tending and the drive side. The felt travelling-in device is suspended from the crane outside the machine.
  • 94. Fastening the pull rope Eye bolt Rope Felt Loop 1. Pull the end of the rope through the felt loop or under the felt loop toward the tending side framing. 2. Hang the rope with the belt hook in the eye bolts.
  • 95. Felt Changing 2P Top 1. All rolls are in felt changing position. Felt stretcher roll Felt regulating roll 2. Use crane to put felt stretcher roll into parking support.
  • 96. Felt Changing 2P Top 2. Remove movable platform and walkways. 1. Remove the spacer blocks.
  • 97. Felt Changing 2P Top Traveling device Rope (inside) Cramp Rope (inside) Cramp Cramp 1. Install the new felt into the device. 2. Roll off the felt loop appox. 18m. 3. Set tension rope to the machine through the felt loop. 4. Set the device to the rail. 5. Attach felt cramps. 6. Run-in the felt. Rail
  • 98. Felt Changing 1P/2P Bottom 1. All rolls are in felt changing position. NipcoFlex roll Pick-up suction roll Felt lead-in roll 1P top Felt lead-in roll Felt lead-out roll 1FL felt stretch roll
  • 99. Felt Changing 1P/2P Bottom 1. Slide the stretch roll to the Tending side
  • 100. Felt Changing 1P/2P Bottom 2. Remove movable platform and walkways. 1. Remove the spacer blocks.
  • 101. Operation Procedure
  • 102.  
  • 103.  
  • 104.  
  • 105.  
  • 106.  
  • 107. Stop Sequence
  • 108.  
  • 109.  
  • 110. NFP supply oil temp. control valves Please flush the oil cooler every month to prevent any trouble by contaminants inside plates.
  • 111.  
  • 112.