Alcell Technologies, Atholville
- Feb/96 completed 3 month TCF bleaching using Op(Q)EopP to 89 ISO
- used both DTPA and sulphuric acid to pH 4, no significant differences (including costs)
- considering chelation on final brownstock washer, ie. QOpEopP
Avenor, Gold River
- last year 4 stage to 5 stage DEoDND
- starting Rader chip screening with conditioners
- liquid SO2
- putting 12% caustic system in
- installing new chlorate tank
- Aug/96 will be ECF when chlorate supplier modifies barge
- converting TSP to MC pumps in bp, bs areas
- upgrades to R8 - better level control, flow control (34 tpd --> 42 tpd)
- new precipitator on RB next year, mothball Teller scrubber
Cariboo P&P
- ODEopDEpD
- new tall oil system being installed this year
- enzymes prior to screen HiD, 5.8 pH, 450C, so can’t get Do temperature high enough = $2.50 saving
- chip thickness screening on-line June/96
- evaluating Matheson acid purification, so can recycle acid back to generator, provide acid to tall oil plant
- installation of Turbotac bleach scrubber this year
Celgar Pulp
- digester milled slot screens in wash zone
- digester kappa swings - installing triple extraction version of Lo-solids, want better upflow through digester
- corrosion monitoring project on digester
- CO2 trial on post O2 washers - objectives: reduction in COD, Na; runnability through pressure diffusers (June)
- Do Ahlmixer to be installed (replaces 1 of 2 mixers), 12 lps through each mixer (Elk Falls uses 20 lps through one)
Domtar Specialty Papers, Cornwall
- started #3 generator(Solvay) - running well
- swung digesters to new DCS
Donohue St.-Felicien
- new co-gen plant startup next week
- new 17 foot slaker startup next week
- new causticizer startup Sep/96
- have been running CO2 for one year
- installing drain on bottom of digester
- have been running Kajaani kappa analyzer for one year now
E.B. Eddy Forest Products
- scrubbing ClO2 with E1 filtrate and second post-O2 filtrate, recently installed packed bed scrubber, 800 gpm filtrate, have Kinney strainer to remove E1 filtrate fibres, 8 ft dia, 10 ft packed, 21,000 cfm, conc 150 ppm, could knock 400 ppm out, 2" tripac medium
- existing packed bed scrubber modified for HW line (WL scrubbing medium)
- last fall hypo stages converted to up/down dioxide neutralization stages, Ahlmixers on both, only problem is plugging nozzles
- low solids cooking started yesterday, expect to get back to the same type of operation as it was before EMCC went into operation (retain some hemicellulose)
Emballages Stone, Pontiac Division
- TRS must be reduced (now have cascade evaporator), so new tertiary air in RB
- looking at scrubber system to recover gases in brownstock area, stand alone incinerator system to burn brownstock TRS (TRS up BLOX stack is okay for government, since that is an environmental unit)
- work going on photograde HW bleach plant sequences - now starting ECF trials
- DcEoHDED
Fletcher Challenge Canada, Crofton P&P
- pin chip kamyr modified, cold blow, extraction
- put chute on side of blowtank, MC pump on bottom so can pump from hi-consistency zone of blowtank to Kamyr blowline
- excellent experience with CO2 on brownstock washer
- future - turbo charging RDH batch digester system - reduce cycle time, so can increase production 10-15%
Fletcher Challenge Canada, Elk Falls P&P
- replacing old M&D with new 400 tpd mini-chip digester, startup 96Q3
- includes new trash screen, new suction box, covers on the chemiwasher, and new MC pump
Fletcher Challenge Canada, Mackenzie Pulp
- $54 million mini-chip pulping line and mill modifications due to startup Oct/96
- includes 250tpd M&D digester, the first DD washer in North America, barrier screen, 3 stage slot screens, Corrudec decker, a number of HiDs, on-line Kajaani fibre length analyzer, top felt on couch roll, primary reverse cleaners
- screens and decker started up in April
- installed ClO2 sensor on Turbotac stack
- BCE pushing for 50 mg/m3 particulate on all stacks
Harmac Pacific
- mini O2 delignification on chemiwasher line Nov/96 (650 tpd)
- MC Do stage in C bleach Nov/95 (650 tpd)
- cold blow cooler on Kamyr extraction liquor, startup soon
- engineering chip thickness for 1997 for both batch and kamyr lines
- New bleach plant scrubber on A bleach, startup next week (packed tower scrubber, 16,000 cfm, Eo filtrate, have 2 other scrubbers already in service
- new Eimco slaker s/u next week
- new Ametek ClO2 analyzer installed, hope to run 12gpl ClO2
- optimizing H factor control on digesters
- extensive study on BP and R8 scrubbers and collection systems
Howe Sound P&P
- switched evaporator for SO2 to micromotion for liquid SO2
- bar type chip thickness screens
- installing new Do washer Corrudec, will do some efficiency
- lots of vibration on PCV O2 delig, so replacing
- installed new flow meters on all showers as part of TCF, but found tremendous improvements on all grades, since all level controls were changing, shower flows were changing, now operation of washer has smoothed out (30% defoamer reduction)
James Maclaren, Thurso
- April/96 began separate cooking of HW, SW
- May/96 will begin species control, mainly Jack Pine, Maple, Beech, Birch, Poplar
- Sept/96 will have new pre-bleach washer, modifying Do to MC ( 4.2% --> 12% - this will increase retention time from 15 to 45 minutes)
- now 20% ECF, in Sep/97 will be 100% ECF
James River-Marathon Ltd.
- Nov/95 secondary treatment startup - 5km from mill, 10 retention ASBs
- Apr/96 ISO 9001-1994
- May/96 #1 pulp machine upgrades
- Jun/96 new digester DCS (Fisher Provox)
- fall/97 new evaporators, steam stripping
Kimberly Clark, Terrace Bay
- 1 safe year, first time since 1963
- 50 tpd R8 complete, started up well
- economizer on No2 Recovery, but precips a little small
- double felted fourdrinier 1st and 2nd presses
- trash screen to headbox
- 2 new HiD (700 t), so can have mini s/d ==> 5 extra operating days
- teamwork efforts continue with flattening of management, lots of training, decision making lower
- working on 34 MW extraction TG ==> 95% self sufficient
- increased chip handling capacity of woodroom
- will run sw on hw line if prices don’t improve
- now 10-15% ECF, 1998 50% ECF
MacMillan Bloedel, Powell River
- new 600 klb boiler to shut down 3 old pbs
- flour removal from chips, reject <3mm (diamond roles)
- scrapping 2 hypo stages, startup in Aug
- new HiD to replace one that failed
- wet lap pulp machine - to sell to Port Alberni, startup in August
Northwood Pulp and Timber
- successful startup of white liquor pressure filters
- conversion of 3 out of 4 primary chip screens to Acrowood diamond roll
- started Rader chip conditioner
- acidification of Do and D1 stages in both bleach plants
- low solids pulping - fall/96
- A line mini O2 , post O2 washing, change Do to MC - fall/96
- CO2 brownstock washing trial Jun/96
- upgrade 5% caustic system
- early 1997 for ISO 14000
- reviewing company wide decision on how to handle hog - burners at sawmills or upgrade pb with precipitator, dump condenser, cooling tower
Repap New Brunswick
- installing rebuilt Eop washer
- switching sequence to DND
- installing new tail gas scrubber fan with de-mister and new high flow packing in tail gas scrubber
Stone Consolidated, Ft Frances
- looking at using old hypo stage for poor man’s O2 delignification
- scrapped chlorine system
- scrapped hypo system, so running 3 stage bp original 4)
- extensive upgrade to BP instrumentation - pH measurement to T10, T20
- on-line kappa Kajaani analyzer with feed forward to ClO2 stage, eventual feedback to Do and Eop stages
- near future O2 delignification
- investigating enzymes
- on ECF December 22, 1995 - DEopWD
- converting DCS to PC based system
- residual and tower brightness on every tower
- pump stock to International Falls - will install on-line brightness meter (currently have 3 magmeters on the line)
- installing floating roofs on ClO2 storages
- installing new batch digester fall/96 (current are 25 years old, so need to replace or weld overlay)
Western Pulp Ltd. Partnership
- CO2 on brownstock decker, have found some COD reduction
- June startup of Kvaerner pressurized Eop (95oC, 30 min reactor, 90 min diffuser)
- hope to be 100% ECF after installation
- originally were going to add another Do tower, but Doug Pryke suggested robust Eop instead
- installing new Honeywell DCS
- DEopD will be new sequence, should get 88 ISO, some loss in viscosity
Weyerhauser, Kamloops
- Kamloops modernization started April for completion fall 1997
- oxygen delignification (by IR) and mill upgrades to increase "B" mill capacity by 7%
- white liquor pressure disk filter
- all brownstock and bleach plant washers upgraded to Corrudeks
- new brown HiD feeding MC Do stage
Weyerhauser, Prince Albert
- installing R8/R10 generator to increase 30--> 50 tpd, so DWEoDED, 100% sub
- increasing Do consistency 3.2% to 4.5 %, temperature 52oC to 62oC
- installing 2 titanium ClO2 heat exchangers
- E2 Ahlstrom MC pump
- $13 million project
Air Products
- Crestbrook installed oxidized WL reactor, were going to use
- first year was on thiosulphate, now commissioning fully sulphated WL, then fully oxidized WL
Cominco Research
- Aerated mixtures of aqueous sulphite are strongly oxidizing (Caro’s acid). Cominco is considering a research project to deal with the problem of cellulose degradation. If you want further information, please contact Steve Paolone
CXY
- bought new plant
- now second largest producer in the world
Dupont
- end of July will double plant size
FMC
- Bayport, Texas plant expansion 45,000 tpy --> 110,000 tpy H2O2 Dec/96
- PG - successful compliance audit to Responsible Care (CCPA)
ICI
- both AQ plants now upgraded, 1 in Cornwall, 1 in Charlotte, NC, 3000mt AQ capacity
- doubling capacity of H2O2 to 140 million lbs H2O2 in Quebec plant
University of Toronto
- Moisture measurement - di-electic probe in chip bin, not successful yet
- off-line nuclear measurement working well (measures atomic hydrogen in water and wood), great opportunity for truck measurement
- HW bleaching - lipophillic fraction during ECF bleaching
- Xenon ultra filtration project
- Aracruz and kamyr impact on different digester properties, eg, hemicellulose on eucalyptus
- consortium on effluent characteristics, biological treatment to eliminate AOX, MFO inducers during biological treatment, microbiological tools to manage treatment system "phenotypic fingerprinting" to determine changes to population before BOD puts you over permit