TDM 94- , 1994

CPPA Bleaching Committee

Mill Opportunities Session, October 22, 1996

Canfor, Prince George,

Bleached sack kraft project underway
Mechanical and electrical upgrades

Intercontinental, Prince George

Low odour boiler start-up
Finished Goods Information System on-line connects with Vancouver, Brussels, and customers etc.

Cariboo P&P

Installed tubular Bleach Plant scrubber using white liquor
Installed chip thickness screening
Completed Tall Oil Plant
Replaced two and M/C pumps with internal degassing
1001 t/d past month

Celgar Pulp

CO₂ on post O₂ diffuser washing
Additional post O₂ washing under review

Domtar, Senneville, Que.

Quevillon -- planning O₂ delignification

Domtar, Windsor

Retrofit and capacity increase from 24 to 40 tons/day ClO₂ Generator R8/R10 (Oct. 96)
Brown Stock screens modifications with slotted baskets (Dec. 96)
New Ahlmix mixer in Do Stage position (Oct. 96)
ECF Bleaching (Nov. 96)
New D1 Stage planned: 1250 ODMT/d, 3 hour retention time with Beloit Washer & Ahlmix Mixer Start-up: April 1997

Harmac Pacific

ISO9001 certification in July 1996
Building new chip screening system
Approval for new chip reclaim system
Starting up 2nd mini-O₂ delignification on second line

James Maclaren, Thurso

Switch to M/C consistency in Bleach Plant

E.B. Eddy Forest Products

Started LoSolids on softwood continuous digester last week - limited data right now - have seen viscosity increase 2 pointsat some K numbers.

Have been running alkaline filtrates to S10 scrubber - have seen stack emissions drop 100 ppm to zero. Considering using white liquor

Planning $77,000,000 modernization to hardwood line

Currently doing demolition to make room

Impco equipment selected for brown stock areas

Twin roll press for O₂ delignification will also be replaced as will O₂ washers

Fall 97 start-up expected.

Latter phases will see installation of MC Z Stage, and all bleach plant washers, pumps, and mixers. Project will run through 1998 or 1999.

All equipment to be sized for later expansion project that has not been approved yet.

Ozone bleaching stage - digester and bleach plant 1998?

Howe Sound P&P

Upgraded digester consistency and level control
Advanced control on washers
Problem with B/S Kamyr Diffuser - rebuilt and broke twice since - broken nozzles
New spring gate roll size press and internal sizing
Upgrades to consistency control on TMP line

Irving Pulp, St. John, NB

See notes from presentation
Installing Kappa analyser
Upgrades to digester in future
Using cooling water to heat ClO₂ in winter

James River-Marathon Ltd.

50 year anniversary of the mill start-up on October 15, 1996. The mill made 6,739,961 BADMT during that time. Record production in 1996 (171,041 BADMT)
October 22/96: 430 days since last Lost Time Injury (900,000 man-hours)
Secondary Treatment start-up in November 1995 (4.5 km from mill) 45% reduction in AOX
Resources Alignment underway
D1 Kajaani brightness probe relocation to 30 m. after ClO₂ injection has eliminated filming over of the probe (Aug. 1996)
Blow Tank Implosion (July 1996) after blew 3 digester in a line, plugged vent line, vacuum relief not working. New blow tank installed in 22 weeks.
New Digester DCS System installed July 1996 (Fisher Provox)
CO₂ trial on B/S Washer was conducted in October 1996
New Evaporators / Steam Stripping / Blow Heat Recovery upgrades Fall 1997

MacMillan Bloedel, Powell River

Upgrades - Replaced hypo bleaching with new ClO₂ stage
Upgraded extraction stage washer
Upgrade ClO₂ plant
New wet lap machine going into Port Alberni mill
New bleached HD storage in January 1997

Malette, Smooth Rock Falls

Defoamer mini survey - answer will be send soon

New Lavalley washer on D₂ stage in May 1997

Tried Conflo refiner in Screen Room. Production up 1%.

Maintenance was on 24 hr shift coverage until grievance. Mill lost. 24 hr coverage worked very well when it was in place. - maintained up-time through operating and maintenance improvements

Northwood Pulp and Timber

Started pressure diffuser in ‘A’ line July 1996, reduced atmospheric diffuser. Defoamer usage reduced from 1.5 kg/t to 0.5 kg/t
Soda loss decreased from 20 to 15 kg/t
Progressing to start-up upflow and downflow M/C Do stage, first at 3.2% consistency, then medium consistency as wash press is available
Mini-O₂ delignification beginning in December 1996
Diamond roll screen in chip screening this past winter has been opened from 7mm to 11mm
Advance control package on ‘B’ line with kappa analyzer - measuring brightness into D1 stage as feedback
Two theme teams: one for cost reduction in mill and second team for reliability
Installing precipitators on 2 power boilers in 1998 and 1999. to help air quality in Prince George bowl.

Repap New Brunswick

Replaced brightness / residual sensors at Dc Stage
Installed new brightness / residual sensors on D1 Stage
Installed new high shear mixer in D1 stage
Presently looking at Lo-Solids cooking at digester and several different options, Re: ECF pulp production (very preliminary)
Close to 2,000,000 man-hours without a Lost Time Accident
Now commissioning a new enclosed belt chip conveyor on chip handling system
Recently commissioned Flaxol nitrogen padding system on Cl₂, SO₂, H₂SO₄ and NaOH unloading systems.
Have ordered a new DuPont ClO₂ gas analyzer

Weyerhaeuser, Kamloops

Start-up of new Noss secondary knotter start-up after fall maintenance shutdown, ‘knots’ to bunker.
Going to Po screen to sawdust pulp brown screening system
New dregs filter after fall shut
Fall shut 10 days on large line, 30 days on small line to rebuild recovery boiler. for added BL capacity
Progressing on modernization:

O₂ reactor on site and erected
New brown HD half built
Recaust building in progress
Seeing the results at the early upgrading ‘B’ mill production well above budget last several months.

Weyerhaeuser, Prince Albert

50 t/d R10 Plant has been operating since May 1996

100% ClO₂ substitution @ Do Stage with 4.5% consistency.

Do stage now Ahlstrom Ahlmix mixer

Two ClO₂ Ti heat exchanger installed, ClO₂ is being heated up from 10° C to 40° C. ClO₂pre-cooler counter current with mill water incoming water and the second with Eo filtrate. ClO₂ heater is warmed up with Do filtrate.

Temperature of ClO₂ raised form 10 to 40 °C
Savings $300,000/yr in steam
Domtar Cornwall and Irving at Saint John.

D E Eo DED

45 kg/t pulp 25 K no. 92 brightness

CXY

Expansion to 460,000 tpy chlorate production
Now 2nd largest producer in world

Dupont

Have doubled peroxide capacity at Gibbons, Alberta