Paper Machines Stock Prep Class 2

P&ID’s Blend Chests Through Machine Chests

Today

• Review• Stock Prep Theory• P&ID’s for Blend chests, Ticklers, Machine

Chests (both Machines)• 3D model• Phases of installation

Review

• Recirculation Refining– Flow control– HP control– Level control– HPD/T control– Consistency control– VFD feed pump– Our refiners– What ties it all together. What develops the stock.

GP Papermaking 2002 Class

• The following is stock prep standard practices• Pasted from training document• Industry standards, Textbook standards, Audit

results from other mills• Think and Talk through your equipment: stock

prep, tanks,

P&ID Notes• P= pressure, L=Level, T=Temperature, F=Flow,

J=Power/Hp, N=consistency, • _T = _ transmitter PT=pressure transmitter• _I = _ indicator LI = Level indicator• _IC = Controller LIC=Level Controller• _V = _valve FV= flow control valve• Dotted lines connect you from control points

to the valve or whatever is controlling it

P&IDs

• We covered LD to the Blend Chest in last class (any questions or review?)

• #1pm Blend Chest (21-PF-009-001)• #1pm Ticklers (21-PF-010-001)• #1pm Machine Chest (21-PF-011-001)• #3pm Blend Chest (23-PF-046-001)• #3pm Ticklers (23-PF-047-001)• #3pm Machine chest (23-PF-048-001)

3D Modeling

Phases• Stock Approach (HD – Machines)

– Phase 1: Secondary refiners to series (June)– Phase 2: #3pm new machine chest online (August)– Phase 3: #1pm new blend and machine chests online (September)– Remainder is in final outage

Review

• What Feeds the Blend Chest? #1pm, #3pm

Review

• What Feeds the Blend Chest? #1pm– #3, #1 refiners (PM1 refiner line)– Broke from 15 ton broke chest pump– Recycle (piping/valves but we don’t plan to put it

there except when it is unrefined)

Review

• What Feeds the Blend Chest? #3pm– #1, #2 DD refiners (PM3 refiner feed line A)– #2, #9 refiners (PM3 refiner line B)– Broke from 15 ton broke chest pump– Recycle (piping/valves but we don’t plan to put it

there except when it is unrefined)

Review

• What is different about your ticklers?

Review• What is different about your ticklers?– Stock will go to #6 first then to #5– Recirc piping and control– #3pm plans to only use #7, #8– You have a tank after them (no rush like today, you

have time to valve)– Operate lower consistency– They will not have recycle in the ticklers. It is all

broke (broke has recycle) and virgin

Review

• Why do we put recycle in the Machine Chest?• Is that Good or Bad?

Review

• Why do we put recycle in the Machine Chest?– So it will not be damaged by the tickler refiners

Review

• Why do we put recycle in the Machine Chest?• Is that Good or Bad?

Review

• Why do we put recycle in the Machine Chest?• Is that Good or Bad?– It is not correct- you shouldn’t blend in the Machine Chest– You shouldn’t control consistency in the Machine Chest (it

should already be stable, a control valve may swing it more)

– But we do not want to damage long softwood fibers. If we are able to not use much Tickler HP then we may choose to put recycle in the Blend Chest. This will come through trials

Review

• What is the goal of Stock Prep?

Review

• What is the goal of Stock Prep?

Review

• What will we see next in construction / startup?– Installing piles for new #3pm Machine Chest

• That will become base/ concrete, then tank building– Valve out River Side Tile Tank

• Catwalks, structure, access, move equipment, build a floor, tile work, new agitator for bottom, modify top agitator

– Phase 1 piping where you get #3,#1 refiners piped together and recirced, and #2,#9 refiners piped together and recirced (JUNE)