CPPA Bleaching Committee

Mill Opportunities Session, May 2/95

Celgar Castlegar

  1. ISO 9002 Jan 1995
  2. recover more pin chips, so higher wood recovery
  3. 9 day s/d - 2 floating roofs installed, cut vent losses by 90%
  4. installed filters for acid to ClO2 plant
  5. digester wash circulation screen modification

Crestbrook

  1. asset renewal project about $260 million almost complete
  2. record month for April (675 tpd vs. previous record of 635 tpd), record daily production of 799 ADtpd.

Stora Forest

  1. building activated sludge effluent treatment - Sept/95
  2. water conservation projects to reduce load on clarifier
  3. sulfite mill, 25-30% TCF, every year regrout bottom of Do tower
  4. 26 day s/d to rebuild generating bank on recovery boiler

Weldwood Hinton

  1. new Corrudec III on D2 washer
  2. Do control instrumentation rebuilt
  3. R8 new barometric condenser
  4. oxygen delignification control strategy Mar/95
  5. continuing extended AQ trial

James Maclaren - Thurso

  1. secondary treatment - Jun/95
  2. certified ISO 9002 - May/95
  3. replaced 2 brownstock primary screens with "stingrays" from .014" to .006", shive problem gone, 92% quality to 99%
  4. 2 brownstock washers converted to Corudec
  5. CO2 trial brownstock washers - May/95
  6. 300 t blow tank, separate hw/sw cooking, species segregation
  7. AQ used regularly to debottleneck liquor cycle

Champion Pensacola

  1. R3 to R8/R10 - Apr/95
  2. ECF production, both hw and sw - Jun/95

Weyerhauser Kamloops

  1. started new digester Oct/94, great startup curve
  2. "diamond back" chip bin (no moving parts) works great
  3. EMCC until recently, now low solids cooking (LSC)
  4. sawdust line uses AQ, kappa number variation reduction (25 kappa), EA down, apparent yield increase

Weyerhauser Prince Albert

  1. Installing floating roofs on both ClO2 storages
  2. switched from 10 micron to 1 micron filters
  3. kajaani ClO2 analyzer for absorption tower
  4. installed 200 hp motor to p40 pump, will increase recirculating rate, linear velocity is close to 9 ft/sec
  5. enzymes since fall/92 IOGEN GS35, now HS70, less expensive
  6. fall/94 upgraded digester DCS
  7. permanent brown screen room acidification is under construction
  8. purchased Kajaani kappa analyzer

Fletcher Challenge Canada Mackenzie

  1. installed chip truck dump, start up Apr/95
  2. new Fisher Provox DCS system installed in recaust fall/94
  3. new slaker, causticizers going in 1995
  4. new thickness screens going in 1995
  5. AQ trial - tentative yield at 3% on BD wood, Kno Standard deviation down from 2.5 to 1.5, all strength tests (viscosity, tear, tensile, burst) higher
  6. planning to build an M&D sawdust digester, 225 tpd, startup Nov/96, will campaign sawdust and chip pulp through bleach plant and machine

Fletcher Challenge Canada Elk Falls

  1. Mar 95 ECF mill
  2. almost finished installing CO2 for sawdust line
  3. new M&D sawdust digester proposal is being evaluated
  4. plan AQ trials

Fletcher Challenge Canada Crofton

  1. finishing modifying sawdust kamyr
  2. Eop bleaching to B bleach (used in A bleach for last 1.5 years)
  3. discontinued TCF bleaching
  4. have floating roofs on ClO2 storage, so run at 13 gpl
  5. acid filters on R8
  6. methanol storage taken offline because of rust in nylon gears of pump, found rust was not from tank corrosion, ran straight from a truck during shutdown (Quadra looking into with Methanex)
  7. added 15% capacity to flakt by improving the steam supply
  8. achieved 1991 modernization tonnage targets

Canfor Prince George

  1. both mills (PG Pulp and Intercon) running well, safety record excellent, 99% on grade, quality excellent
  2. have dropped low AOX ECF grades, all semi-bleach now produced at PG mill
  3. will trial bleached paper on sack kraft machine, if it works will split bleach plant so can run bleached paper during semi bleach runs
  4. co-gen plant, medium density fibreboard (MDF) plant in planning stages
  5. a liquor line will join the two mills together this year
  6. third ISO 9001 audit will be held Jul/95

St. Laurent La Tuque

  1. ISO 9002 - Dec/95
  2. Secondary activated sludge effluent treatment - Sep/95
  3. installed top former on bleached board machine
  4. plan to add O2 delig, bs washer (800 Adtpd), new bleachery for sawdust
  5. convert kamyr chip to sawdust (already have 800 t sawdust on two kamyrs), expect sawdust to be in short supply due to MDF plant startups

Avenor Dryden

  1. Kajaani kappa analyzer, brightness and residual sensors Do and D1
  2. new lime mud filter
  3. 13 gpl in ClO2 storage, doubling storage from 4 hrs to 8
  4. starting to build new chip handling system
  5. purchasing new DCS digester, recaust
  6. fall/94 rebuilt recovery boiler
  7. MODO "Mops" data archival system
  8. production record: 28968 Adt slush Mar/95

Avenor Thunder Bay

  1. hw chip dumper and pad, reclaim system, air density separator, bar thickness screens, chip conditioner - end of 1995
  2. BMH chip bin, 30 min retention in HW line - June/95
  3. upgrading A sw pulp machine: new headbox, two new top felts, new cutter, layboy, and new CD controls, expect 65 tpd increase - by Oct/95
  4. B hw machine third press top felt - May/95
  5. B evaps O2 SBL oxidation (THR from Air Products) Sep/95
  6. Secondary effluent for newsmill - end of 1995
  7. DCS for digesters and bleach plant - 95-96
  8. commissioning one Kajaani kappa analyzer for both lines
  9. ISO 9002 - Jul/94
  10. R10 upgrade from 50 tpd to 60 tpd
  11. deinking slowed to 40% due to price of recycle fibre, replaced with groundwood
  12. safety - safest mill in Canada for 1994,
  13. production record 1994 - 501,000 t slush

Cariboo Quesnel

  1. successful trial on EA analyzer (Paprican)
  2. two tube leaks down for 15 days, installed risers, stabilizers to improve circulation
  3. chip thickness screening may be approved

Western Pulp Squamish

  1. new Eop tower by Kvaerner, expect AOX<1 kg/t, offload generator so can make ECF
  2. starting Hazop on chemical storages, finish by this fall (because of ClO2 spill at Powell River)
  3. new ClO2 analyzer being evaluated, Spectra-Tech, $5000

Northwood Prince George

  1. AQ pulping is a success, definitely get 1.5-2% off machine, now have contract for two years AQ supply
  2. alum replaced by Diachem NIAD for water treatment
  3. trial inline sensor (like ORP) on R8 recirculation loop, reasonable correlation to chlorate concentration, will report in future
  4. converting B digester to low solids cooking (LSC)
  5. capital approved to close chip screens to 7mm, Acrowood diamond roll + Rader chip conditioner (chips fall between two rolls that create fissures, reducing effective thickness - replaces slicer) - fall/95
  6. A line washing upgrade approved - pressure diffuser, mini-O2 (25% delig), post O2 wash press, MC Do, countercurrent filtrate to recovery (brown screens will be closed - presently sewering filtrate) - fall/96

Stone Container Portage Du Fort

  1. Feb/95 opened new landfill site
  2. secondary treatment energy conservation
  3. 94 new production record, new quality record
  4. 95 well ahead of safety record
  5. ClO2 storage upgrade to 8 hours - MoE wanted dikes around storage, but too much of a safety hazard, so no new dike. (Celgar has dikes around every storage tank)

EB Eddy Espanola

  1. in middle of conversion of 15 tpd R3 to 38 tpd R8/R10 - May/95
  2. Bailey process control view stations and Infi90 DCS upgrade
  3. Kemotron in recaust this year
  4. using combination of filtrates from hw and sw extraction stages and 2nd post O2 washer on sw line for ClO2 scrubbing. Old sour water system was 50-80% efficient, alkaline filtrates are 100% efficient. Using Kinney strainer for fibre removal - has ss filter elements (delrin disk did not last 2 months due to temperature)
  5. conversion of DcEHD bleach lines to DoEDnD - Sep/95

Donohue St. Felicien

  1. Jan-Feb/95 AQ trial
  2. dispersant trial since Mar/95, still working on results
  3. Kajaani kappa analyzer on blow line - Sep/95
  4. Corudec bs washer - May/95
  5. liquor cycle size increase, so new slaker, causticizer, lime mud filter, tertiary air to recovery boiler
  6. CO2 trial bs washers - May/95
  7. Cogen project starting Sept/95

 

Alberta Pacific Boyle

  1. Production records: HW 1930 tpd, SW 1500 tpd
  2. pitch dispersant trial to replace talc in brownstock area almost complete, will look at replacing talc in bleach plant with detackifier - Reason: due to higher price, and have seen some felt filling from talc
  3. post O2 delignification pH probe to be installed, no optimization done yet
  4. upgrading bs washer blower to get consistency up, will do similar trial in bp
  5. justified installing additional vacuum box on machine
  6. completed R8 generator trial 13-14 gpl, no increase in emissions from floating roofs, but simulating summer conditions (8C okay, 9C not) had some slippage through absorber. Mill normally 10-11 gpl.

Repap Miramichi

  1. installed #6 LPF gave 40 - 50 tpd increase
  2. investigating LSC and side to side switching on digester
  3. completed 3 surfactant trials with AQ - no conclusions yet
  4. doing Eop optimization
  5. during rail strike ran 75% ClO2 substitution
  6. CO2 trial - Jun/95
  7. both papermills recently certified ISO 9002
  8. looking at chip thickness screening
  9. installing activated sludge for groundwood effluent

James River Marathon

  1. Secondary treatment 4.5 km away from mill - startup Dec/95
  2. BS washers coverted to Impco Coru-dek III, have found reduced BL carryover (half), reduced defoamer usage with a cheaper defoamer being used
  3. Received ISO 9002 certification - Jan/95
  4. Site optimization study to increase to 660 tpd (RB limited) - new MEEs, feedwater system, pulp m/c rebuild, etc
  5. new Fisher Provox DCS for batch digesters - startup Sept/95
  6. R8 reboiler being replaced with titanium grade 7 (currently 22 of 130 tubes are plugged in grade 12 titanium reboiler in service since Nov/89)

Harmac Pacific Nanaimo

  1. installing floating roofs - May/95
  2. installing dilute H2SO4 for bleach plant pH control - July/95
  3. C bleach plant - will reconfigure Papricycle to bleach plant pre-washer and MC Do stage, will run ECF all the time on all 3 bleach plants - fall/95
  4. new steam and recovery boiler island - new RB, and TG, plus conversion of existing RB to fluidized bed PB - anticipate approval in next few months
  5. targeting ISO 9001 Sep/95

Sterling Pulp Chemicals

  1. board approval for 100,000 t/yr chlorate facility in south eastern US, probably Georgia
  2. debottlenecking existing facilities for 20,000 - 30,000 t/yr extra

Histed Consulting L’Orignal

  1. TAPPI monograph hypo chapter, water use chapter
  2. lots of work for consultants

ICI

  1. closed site at Cornwall
  2. safety record 32 years 5 million man-hours

Alcell Miramichi

  1. looking forward to having committee in Sept
  2. have purchased a 5 tpd bleach plant

Degussa

  1. are building a new 80,000 tonne peroxide plant near Montreal, startup late 1996
  2. currently building a tank farm at Montreal site that will receive deep sea shipments of peroxide from Europe and Mobile

Canadian Oxy

  1. CanadianOxy Chemicals and OxyChem US formed a partnership May 1, 1995 called CXY Chemicals. CXY Chemicals’ assets will include the 4 CanOxy sodium chlorate and one CanOxy chlorine and caustic plant plus OxyChem’s 125,000 ton/year Taft, Louisiana, sodium chlorate plant.