Mark Livingstone

PULP MILL, SEMI -CHEMICAL Sulphite, 18,5 BDT/H (430TPD)

MACHINERY LIST 

• Wood park
• Chemical products
• Pulp mill
• Evaporation
• Stripping warehouse

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

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

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

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

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.