PULP MILL 420TPD
1) Wood park
2) Chemical products
3) Pulp mill
4) Evaporation
5) Stripping warehouse

1) Wood park
Manufacturer: RAUMA REPPOLA
For the preparation and stockage of chips:
– Chipping capacity: 1.120 tpd
– Stockage capacity: max. 55.000 Tn. Transportation equipment for continuous feeding of logs:
– 1 Belt conveyor for receiving the logs Max. capacity: 150 Tn/hour Width: 3.200 Length: 8.100 Height: 5.100
– 2 Chain conveyors for waste
– Rolls conveyor for logs 900 m. width x 5.500 mm. length 15 Dented rolls
– Logs cleaning by cold recycled water and some clean water
– 2 Purges for stones
– 1 Transport belt for feeding the chipper Width: 1.200 with metal detector
– 1 Fixed crane for maintenance with remote control JONSERED J 1820 type, year 2.004
– 1 Chipper and enclosed material 1 RAUMA REPPOLA chipper 12.3000 type Length of cut: 21 mm. Disc of 3.000 mm. with 12 knives,
300 rpm VOITH Hydraulic couplings 2 Motors of 5.500 V, 500 Kw each one Speed: 1.475 rpm , Set of knives
– 1 Blowing cyclone for chips
– 1 Set of classification and sortage
– 1 Clasifier capacity 600 m3/h 5.000 m. x 4.000 m, holes of 50-18 – 4 by SUND DEFIBRATOR
– 1 Conveyor belt (by chain)
– 1 SUND DEFIBRATOR rechipper 81.220 type, overhauled in August 1.995, 8 Knives
– 1 Screw
– 1 RADER Feeder
– 1 RADER Surpresser
– 1 RADER Tank for stockage

Installation for collecting the chips
– 2 Belt conveyors
– 1 RADER Feeder and
– 1 RADER Surppreser
– 1 Magnetic separator

Earth treatment
– 1 Chain conveyor
– 3 Band conveyors
– 1 Sieve
– 1 Hammer mill
– Miscellaneous little tools
1 Granulometric control for cuts CHP CLASS type

2) Chemical products
Manufacturer: CELLECO (Sweden)
Process: Liquor of monosulfite of ammonium from sulphur and ammoniac SO 3 (NH42) 205g/l PH 7.4
Material
Sulphur circuit:
3 Tanks of 30 Tn. Total 90 Tn.
1 Sulphur kiln of 15 tpd pulverised by comprised air or steam. Length: 15 m. x diam. 0,80 m.
1 Cooling tower (inox 904 L). Height: 5,50 m. x diam. 0,90 m.
1 Suction tower. Height: 12 m. x diam. 0,80 m. Height: 12 m. x diam. 1,80 m. Intalox equip.
Liquid NH3 tank:
1 Exchanger, 1 Mixer, 1 Buffer, tank
Set of 17 pumps

3) Pulp mill
Digester: capacity 55,9 m3, length 16,8 m. x diam. 2,10
– Carrying of chips by belts with variable speed
– Manufacturer: VOEST-AUSTRIA, BAUER license
– Production: 420 tpd
– Raw material: chips of 12 to 24 mm. 10 % chemical products
– Performance: 80 % dry/dry in digester
– Reactive: Solution of monosulphite ammonium at 205 gl SO 3 (NH 42)
– Consumption: wood 910 tpd brut, sulphur 15 tpd, ammoniac 15 tpd
– Cooking time: 20 min. at 175o, 9 bar
– Shopper degrees: defibrating entry 14o SR, refining entry 48o SR
– Cleaning efficacy: index in treated water less than 10, in clear water less than 45
– Pneumatic transportation: RADER can admit 800 tpd of wood
– Chip cleaning: capacity 220 m3/h. Average: 52 %
– Presteamer: of 12 m3. Height 8,50 x diam. 1,60

– Heater: of white liquor with:
1 ASET horizontal tubular exchanger, BEU 273-2600 type 2 ASET horizontal tubular exchangers, BEU 273-2700 type 1 ASET vertical exchanger, BEM 508-6000 type
– 2 Rotary valves of 18 inches at entry and exit of boiler
– 1 Live bottom tank of 20 m3 with calory recovery, width 2,1 x height 4
– 4 FMW Screws to transport the pulp. Diam.: 500 mm.
– 2 SUND Defibrators, 412 F type, 40” each one with 2 motors of 920 Kw, 1.500 rpm, 5.500 V double disc.
With hydraulic oil pressure system to assure the adjustment.
Dryness: around 38 % at entry. 20/25 % at exit.

– 3 RAUMA REPPOLA Filters for pulp cleaning under pressure and working against current, three stages, power: 25 Kw. Motor speed: 300-1.450 rpm. Surface: 82 m2 each one.
The first and second filters are fed by the middle vat, the pulp of the third filter falls into a screw conveyor. Each filter has a fan for vacuum.
– Steam condensator 12 Tn/h. surface 430 m2 pressure, outside tube 4 bar

– Exit filter no 2
1 SUND Pump for thick pulp Pulp concentration: 18 % Power: 75 Kw, 2 bar, 120 m3/h.
– Malone filter diam. 800 x 1.000

– Exit filter no 3
1 MCEM SULZER Pump
Pulp concentration 12 %
Power: 160 Kw
Production: 18,5 BDT/H semi-chemical pulp
– Set of 51 pumps
– 1 FOXBORO Control system
To control all the cooking
– Refining
3 SPROUT WALDRON Refiners 42”, 1.500 Kw
4 ALLIMAND Refiners 36”, 750 Kw

4) Evaporation
Primary evaporation:
– Manufacturer: APV
– Type: mechanical recompressure
– Capacity: 32 Tn/h.
– Steam consumption: 0 Tn.
– Absorbed power: 700 Kw/h.
– Consistency at entry: 10 %
– Consistency at exit: 25 %
– 1 AHLSTROM RATEAU Overcompressor
– 2 ROSCO Evaporators
– Set of pumps

Secondary evaporation:
Manufacturer: ESCHER-WYSS
– Evaporation capacity: 39 T/h. black liquor at 10 %
– Steam consumption: 13 T/h. low pressure
– 400 Kg. of dry materia per pulp tonne at 10 %
– 2,7 Tn. of evaporated water / Tn. of steam at low pressure
– Consistency at exit: 60 %
– Consists of three counter-current effects:
No 1 of 340 m2 and 520 tubes No 2 of 310 m2 and 276 tubes No 3 of 310 m2 and 276 tubes
– 1 Condensator of 220 m2 and 544 tubes making between 350 and 450 m3/h of water at 40oC
– 1 Heater of 40 m2 and 56 tubes
– 3 Vacuum pumps
– Set of pumps

5) Stripping plant
– HERMEX Lime tank, year 1.995:
Volume 100 m3, diam. 4.200, height 10.200, mechanical filter, 12 m2
– SODIMATE Lime dossifier, year 1.995: DDMR 120 SC Type
– L2M Stock preparation of lime milk, year 1.995:
1 m3, diam. 1.300, height 1.150, with Mixel MM500 agitator
– L2M Stockage of lime milk, year 1.995:
11 m3, diam. 2.500, height 2.100, with Mixel MM900TF600 agitator
– 2 Air compressors, year 1.995:
Capacity 27,18 m3/min. Pressure differential 0.5 bar, Installed power 37 Kw, 2.920 rpm.
– 2 MLABBE Reactors, year 1.995:
Diam. 3.800, height 7.500, capacity 45 m3, shaken volume 23 m3, ROBIN agitator, type F5 140 37/21, installed power 37 Kw
– M LABBE absortion tower, year 1.995:
Diam. 1.000, height 13.000, 3 suction plates, internal pressure 0,5 bar, To 100oC, ABB FOUGAL HK Fan
– M LABBE Condensator, year 1.995:
Diam. 1.150, height 7.800, P= 3 bar, 262 tubes of 51 mm. diam. x 1 m. Vacuum inside the tubes of 7 m. water column
– Aircooler, year 1.995:
Capacity 160 m3/h, RPA 3029-5352006185B Type
– Plates heat exchanger, year 1.995:
Capacity 10,92 m2 + 5,88 m2, DN 100, structure of stainless steel
– Cooling system, year 1.995:
SCX 276 R.00, power 350.000 fg/h, 570 W, water capacity: 100 m3/h.