VER3811 - Pulp Dryers
From high consistency towers bleached pulp is pumped to pulp drying lines
Reject of pulp from pulp dryers is repulped at small pulper
Technical description
Pulp dryer 5
Machine originally made in 1972
Capacity: 300 Tpd
Speed: 78 m/min
Wire width: 3840 mm, with pulp width 3480 mm at reel
Headbox modern type, closed, pressured
Wire part with modern dewatering elements in good condition
Wire section:
Suction couch and wire dewatering elements:
Press part – suction press 1 and 2:
Intermediary dryers, two units, 1500 mm:
Third press, plane press
Dryness after third press 47 – 49 %
Flakt Airborne dryer (Air Industry)
Quality control aystem, Valmet Paper Industry (Neles Automation) at “U” frame, installed 2000:
Pope reel made by Jagenberg, made in 2000 with tambour change over system
Pope reel drum Ø: 985 x 3850 mm
Broke pulper
Three water ring Nash pumps, two are Nash 6001Cl from 2005 year, last is Nash 6002Cl from 2008 year
Type CL 6001 has capacity of air 1 000 m3/hr, motor 250 Kw
For wet part cleaning there is high pressure pump Hammelmann
Pulp dryer 4
Machine was originally made in 1937 and bought second hand from Italy
Capacity: 145 Tpd
Speed: 48 m/min
Wire width: 3350 mm, with pulp width 3000 mm at reel
Headbox is old fashion, open atmospheric type with concrete bath, lined by tiles
Wire part has four modern dewatering elements from IBS Austria manufactured in stainless steel, lined with plastic
Suction couch roll is damaged and in need of repair
First and second press:
Intermediary dryers, two units, 1500 mm and third press
All wet end motors and gear boxes are 12 years old
Dryness after third press 44 – 47 %
Flakt Airborne dryer
Quality control system, Valmet Paper Industry (Neles Automation) at frame, installation 2000
Pope reel is made by Jagenberg in 2000 with tambour change over system
Pope reel drum Ø: 985 x 3850 mm
In 2007 the vacuum pumps of pulp dryer EM4 were replaced by five Nash vacuum pumps with ABB motors, so both dryers were at last equipped with Nash pumps
Two Sulzer pumps (new, with frame) height 33 m, 277 l/sec, motors 1475 rpm, 160 Kw, 500V are stored over there
Sequence of Nash pumps:
P0
Capacity of air: 66 (m3/h)
Vacuum: 35 KPa
Power: 75 Kw
Speed: 575 rpm
P1
Capacity of air: 66 (m3/h)
Vacuum: 35 KPa
Power: 75 Kw
Speed: 575 rpm
P2
Capacity of air: 94 (m3/h)
Vacuum: 60 KPa
Power: 75 Kw
Speed: 535 rpm
P3
Capacity of air: 94/25 (m3/h)
Vacuum: 60/45 KPa
Power: 75 Kw
Speed: 450 rpm
P4
Capacity of air: 25 (m3/h)
Vacuum: 45 KPa
Power: 75 Kw
Speed: 450 rpm
Nash pumps at storage
Sulzer pumps at storage
Pulp dryers data:
Reject treatment
For pulp dryers reject is there new low consistency pulper Fibrella Sweden, Ø 3m, with motor, complete with belt conveyor Hunkeller
Shell of pulper is from carbon steel, piping is stainless steel
Capacity 15 – 20 m3/h, output consistency of dissolved pulp is about 5%, power specific consumption is 4 – 6 Kwh/100 kg of pulp
Reject pulper
Big Jumbo rolls from both pulp dryers are transported for next finishing process by Tambor Transport Train TTW at rail to new baling lines (always two jumbo rolls together) at opposite bank of river
Loading of jumbo rolls is done by crane from rolls storage behind of pope winders
TTW Train:
Finishing
Pulp from pulp dryers was finished at two lines - Valmet Jagenberg rewinder machine with pulp rolls baling line and Valmet cross cutter with pulp bale wrapping
All high voltage motors at this side are for voltage 400 V in difference of the rest of mill equipment, that is 500 V
The cross cutter line is already dismantled
Technical description
Jumbo roll storage
Rewinder Jagenberg Variflex S serves for roll production. Jumbo rolls are coming by TTW train to finishing plant, where are placed by 16t crane at Jumbo tambours storage (35 tambour capacity) and from that loaded to rewinder
Pulp sheet is carried through rewinder and sliced by rotation knives at required width of final rolls, winded at tubs and finished by wrapping, binding and labelling
Rewinder operate at speed 800 m/min
Face width is 3750 mm
One set of rolls is 4 – 6 rolls and exchange of that is done automatically
Wrapping of rolls is done by plastic folia (if requested)
Minimum slitting width is 150 mm
Rewinder is driven by twin motors AC 400 V