PAPER MACHINE, 1,700mm (trimmed width), BOARD & PACKAGING GRADES 60-400gsm, 55tpd
The paper mill produces papers and boards made with wood pulp and with recycled fibers.
Production includes file folder grades and coloured paperboard like manila board and cover board and packaging papers.
1. Main Characteristics:
- Fourdrinier type
- Completely rebuilt from 1960 (see the document “Major rebuilds”)
- Manufacturers: VOITH, VALMET, BELOIT, FREIRIA
- Production: 55 TPD
- Basis weight range: from 60 GSM to 400 GSM
- Maximum speed: 200 mpm
- Wire width (single layer): 2050 mm
- Paper width at Pope reel: 1,700 mm
- Dryer face: 1750 mm
- Rewinder, width: 2100 mm
- Sheeter, maximum width: 1600 mm
- Paper roll, finished maximum outside diameter: 1400 mm
- Composed of (2) MG dryers, Size press and SNC
- Completely assembled and still on operation
2. Raw Material Warehouse
Conveyor Belt type Gipponi 2000 mm width 15 meters length with loading capacity of 15 MT for continuous transport of wood pulp or waste paper bales to the pulper,
3. Stock Preparation
This department, whose project has been created and implemented by VOITH, consists of lines to work with raw materials, wood pulp and cellulose. The cycle is managed via a PLC ALLEN BRADLEY by flow-meters, by pressure, level and consistency controllers (CIC Consistency indicator controls, LIC level indicator control PIC pressure indicator control).
There is a VOITH heat system to eliminate glues and various impurities from the fibers of waste paper.
The main machines utilized are described below.
3.1 Waste paper line
- PLC ALLEN BRADLEY to manage the cycle
- Waste Paper Pulper Type VOITH VS12 kW 150
- VOITH Contaminex to maintain clean the pulper kW 55
- VOITH Jun’Komat
- S.T.M. Trommel Fiber Recovery System
- S.T.M. Compactor for pulper waste
- Turbo-Separator type VOITH Capacity of 60 Tons/day kW 90
- Centrifugal Vertical Cleaner Depurator for dense pulp
- Centrifugal Vertical Cleaner Depurator for the heavy impurities
- 3 Vibrating Sorters VOITH
- Steel Water Chest to supply pulper
- High Density Treatment System – (Heat Shredder type VOITH, 110 kW capacity for ink dispersion and polluting)
- Mini-Pulper VOITH
- Vertical Centrifugal Cleaner Screen
- Vibro- Sorter type Aga Pompe.
- 3 VOITH Defibrators
- 1 VOITH Refiner
- 1 Fiber Recovered Disk and Sector System VARGO
- White Water Chest
- 2 Fresh Water Filters
- Various Chests for water storage and distribution
- Thickener for depuration system and for recovery secondary waters
3.2 Sizing powder mixture preparation system
- Storing silo of 50 m3
- Extraction Screw with motor-reducer with several mixing vats
- Vibrating Sieves for depuration of the obtained stock mixture
4. Paper machine
4.1 Approach flow system
- Constant level chest
- Mixing pump (Fan Pump)
- First Centrifugal Cleaning Stage with 12 Vertical cleaners VOITH
- Second Centrifugal Cleaning Stage with 2 Vertical cleaners VOITH
- Vibro Sorters VOITH
- Color dosage system and various chemical additives with dosing pumps
4.2 Vacuum system
- 3 NASH Vacuum Pumps 110-75-37 kW and Centrifugal Fan 11 kW
4.3 Paper machine
The continuous Foudrinier PM is composed of a single wire.
- Open Head Box type VOITH with a Slice width of 1900 mm equipped with VOITH breast roll
- N. 5 Drainage Boxes with single Foil Blade elements
- N. 7 Wet Low Vacuum Suction boxes
- N. 6 High Vacuum Suction boxes
- Various Rolls for transportation and support of the screen
- Dandy Roll 600 mm diameter
- Suction Roll 800 mm diameter CARCANO (Metso)
- Press Section type CARCANO (Metso) with 3 felts and 3 nip pressure including first Bi-nip Press with 3 rolls and Suction Press Roll,
- Second Press with 2 smooth and drilled rolls continuous electrical
Pre-Drying Section type CARCANO equipped with 12 double felted Drying Cylinders with diameter 1250 mm and width 1750 mm, 2.0 Bar maximum operating pressure.
MG Yankee Cylinder diameter 3600 mm and width 1750 mm, 2.5 Bar maximum operating pressure, with mini press on bottom felt, mini steam system included in the Hood drying chimneys.
A second Yankee Cylinder diameter 2500 mm, width of 1750 mm, 2.0 Bar maximum operating pressure.
Size Press type Beloit with 2 rolls rubber covered diameter 450/420 mm.
Post Drying Section comprising 2 Chromed Drying Cylinders diameter 1250 mm and width 1750 mm, 5 Cylinders diameter 1250 mm and width 1750 mm, 3 Drying Cylinders width 1750 mm, 2 Water Coolers Cylinders diameter 1000 mm and width 1750 mm. Dryers operating at 2.0 Bar maximum operating pressure.
Smooth Calender with 2 rolls 100 Kg/cm linear pressure. Diameter 500/360 mm with variable crown roll shell system type FREIRIA, width 2350 mm.
Pope Reel designed and manufactured by FREIRIA.
NOVAN system sectional control to manage the speed and drive the motors of all the cylinders.
4.4 Sizing and coloring system
- BELOIT Size Press (as described above)
- Chests for heating and mixing
- Automatic cycle control
- 2 Mono Pumps NASH
- Vibro Sorters
- Coloring and Sizing System in size-press, with color tanks and dosing pumps
4.5 Steam generation plant
Steam for paper production is generated from 2 CCT-Caldareria / Carpenteria Ticinese type Boilers with 3000 Kg/h of steam potential at 15 Bar pressure.
A system for reduction of steam pressure to the drying cylinders and to MG cylinder with possibility to differentiate the pressure of the top and bottom drying cylinders.
4.6 Steam and condensate system
It is a system LANG created, to recover condensation coming from drying cylinders to reduce energy costs, including tanks for the recovery of condensation water and vacuum Pumps with exchange condensers.
4.7 Aero-Thermal system FROM BRUNNSCHWEILER for extraction of condensation and climate control of PM department
The system is equipped with:
- 6 Axial Fans for the Moisture extraction, room air climate control and air aspiration;
- 1 Centrifugal Drying Fan for incoming air flow of 30000 m3/hour;
- 1 Centrifugal Fan for Moisture extraction from one-side Calender flow of 15000 m3/hour, 4
- Axial Fans for heating of one-side Calender chimney;
- 5 Axial Fans for PM room ventilation;
- 1 Centrifugal Fan for continuous power motors.
4.8 Compressed Air production System
Including:
- 2 PNEUMOFORE Compressors;
- 1 PNEUMOFORE dryer with automatic air filtering systems and 1 oil-dryer filter.
5. Discharge Water Treatment
5.1 Homogenizing Chest for discharge waters.
5.2 CHEMICAL-PHYSICAL Treatment Station
equipped with chemical reactors preparation vats, chemical reactors dosing vats, and discharge water treatment through automatic control of flow and pH. All dosages are carried out through dosing pumps under the PLC management system.
5.3 Primary Sedimentation System for discharge waters
With rotating sludge collecting blades device for accumulation of sludge at the bottom of the vat, and sludge extraction through a NASH mono pump geared to send flow back into the working area through aerial piping.
5.4 BIOLOGICAL Treatment Station
Equipped with 2 Rolling Bio-disks for the biological treatment of the discharge waters.
5.5 Secondary Sedimentation System for discharge waters
with rotating sludge collecting blades device for sludge accumulation at the bottom of the vat, and sludge extraction through a NASH mono pump geared to send flow back into the working area through aerial piping.
5.6 Thickening of the sludge
Press type ECOMACCHINE.
6. Technical documentation
The company has in its possession a comprehensive technical documentation like designs, outlines, projects, and various literatures indispensable for the management and maintenance of the plant.
7. Notes
- The paper mill is fully operating and it is possible to visit the plant under appointment.
- Technical support for installation and start up of the production can be supplied under specific agreement.
Click here for list of Major rebuilds