Stock Prep Class 3

Today Review No text books or theory P&ID’s for Waste system, #3pm Ticklers, Rejects system, 4 th stage cleaners 3D model Phases of installation. Particularly upcoming secondary refiner work

Review Class 1 we covered series and recirc refining in general. P&ID’s of LD chest into each of the 3 refiner lines (3 p&id’s) Class 2 we covered the Blend Chests – Ticklers – machine chests of each machine (6 p&id’s). We also discussed the design and purpose of blending Class 3 – we have remaining p&id’s to cover: Waste, Rejects, 4 th stage cleaners, consistency dilution tank, HD tower

Review Draw stock prep starting at HD What is our naming and why What is our design and why What are main control points of series refiners – Total flow – HPD/T – Level What are flow controls that aren’t refiners – Broke into blend chest – Waste into machine chest

Waste system Waste P&ID Waste needs refining, but needs separate refining #4 sprout becomes waste refiner (with backup valving as #3pm tickler) Think about your total flows on ticklers without recycle Controls, very similar to every other refiner we have discussed. The exceptions are this is 1 refiner, it has dual purpose as back up tickler, it has to feed 2 different tanks (#1, #3 machine chests), it has back up pump capability. Piping and valving gets busy and complicated looking Total tonnage and flow capacities and why What capabilities do we lose 3D model

Rejects System Rejects and 4 th Stage Cleaner P&ID No longer have shives, no shives = no need to refine them separately You have concentrated sand. Run cleaners thinner and get more concentrated sand Add 4 th stage cleaner to further concentrate sand and dump the sand out of the system Thin, thin, dump sand, accepts to broke

4 th stage cleaners Show brochure 2 cleaners side by side, valves in and out and bypass Intermittent dump (2 dump valves like a junk trap on bottom) Dumps into a dry hopper outside

Consistency Water Consistency dilution tank P&ID This converts the current washer feed tank (stock storage tank) into a white water tank 2 vfd pumps. One becomes hd dilution, the other becomes consistency dilution. Both control header pressure with vfd Like a larger version of 1p10 Fill it with multiuse WW

HD tower HD tower P&ID No big news, just review No pulp mill chest, no refining, just transfer from HD to LD

Phases of installation Phase 1 = secondaries – #2,#9 refiners in series and recirc and into machine chest – #3,#1 refiners in series and recirc and into machine chest Phase 2 = #3pm machine chest – Ticklers in series and recirc, remove stuffbox, use new tank/agitator, vfd on machine chest pump Phase 3 = #1pm blend chest,machine chest – Ticklers in series and recirc, remove stuffbox, use 2 new tanks/agitators, vfd on machine chest pump, but still sharing #3pm blend chest

Phase 1 #2 and #9 in series is doable. Do it first – Run feed piping to #2 and keep it running – Run piping from 2 to 9 and then connect it one day – Hook #1 sprout back into old line and it can run by itself #3, #1 in series is a little tougher. Do it second – Run feed piping to #3 and keep it running – Run piping from 3 to 1 area and on to machine chest – Tie in #3 by itself – Demo #1 piping and reconnect it Working through these details now. Piping arrives 4/24, they hire pipe fitters/welder 5/1 or so, Lots of activities and scaffolding coming to the wet ends of the machines in about 1-2 weeks. Daily permits, scaffolding to avoid, downtime, tie ins, temporary operation

3D