1. Pulp Mill Operator Training Class 3

2. Review Refiner Feed Tank 05-PF-001-001 Screen Feed Tank 05-PF-002-001
Washer stock and showers 05-PF
Washer Vacuum and contols 05-PF

3. Process Flow

4. What haven’t we covered
Filtrate tank, WBL screen 05-PF
MC Pump, Effluent Lift Station 05-PF
Seal water, bathroom, etc 05-PF
Showering pumps/ filter 05-PF
Shower collection systems 06-PF
Blow Tank
NCG systems
Consistency water tank 11-PF
HD tower 12-PF
Stock Prep
Rejects

5. Filtrate Tank and System
1 Big Filtrate Tank
4 pumps off of it
Blow tank dilution vfd(feeds refiner feed tank too)
Screen dilution vfd
Weak Black Liquor Transfer (to screen/recovery)
Screen elutriation
Fill it from washer showers (like current washers)
Baffles inside to help foam and turnover
Big tank, Startup volume will be important. A lot of large pipes to fill.
Look at the flows and pressures for the pumps

7. Filtrate Tank Weak black liquor transfer pump to recovery
You have a small pressure screen on it, rejects go to the screen feed tank
There is a bypass around it so the screen won’t shut pulp mill down
There is a cheat line from the blow tank dilution over to the screen, so if you lose the transfer pump you can cheat off dilution to keep running
Pressure screen is a miniature version of the big hot stock screens
No longer go to the WBL tank in the pulp mill.

8. MC Pump Higher consistency than you currently do
High discharge pressure (200+ psi)
Same size as OCC’s pump, upgraded rotating element.
Vacuum pump impellar built into the pump
Standpipe design, level indication
VFD but not like you think. More set up for 3 main steps of flow (1 digester, 2 dig, 3 digs)
See presentation

9. Shower Collection System
Washer needs clean water for 3 cleaning showers
Washer needs hot water for 6th stage showers
Washer needs about 1000 gpm for this purpose, that’s more than we have vacuum seal water
MC pump needs a shot of flush water sometimes

10. Shower Collection System
To collect different water sources and to heat them, must take place in the pulp mill
Collect them into a gravity strainer up high so it can drain into a tank
Strainer in place of #3 unit chip hopper
Accepts tank/ shower collection tank is in open area beside #4 L36
Rejects drain back into stock storage tank (ww tank)
Vacuum seal water and WW feed into gravity strainer
Mill supply backup, into the tank and discharge of the pump
Drawings and video of strainer

11. Shower collection
You have to heat the water to around 140oF (washing efficiency)
Reuse all 3 spiral heat exchangers
The water side will be this shower water collection
The hot filtrate side will be Blow tank dilution
There is a bypass (auto valve) if you are not getting enough blow tank dilution to the blow tank
There is a bypass (manual) if you cant get enough water through for some reason
Confusing piping and P&ID. Kind of like your coolers today

12. Shower Collection Cleaning shower filters in washer building Brochure
Cleaning shower has smaller nozzles, high pressure, needs cleaner water

13. Blow Tank, NCG
Blow Tank gets an additional cyclone and a replacement Fiber separator
NCG’s are pulled from all stock tanks in new building and piped to a steam ejector on pulp mill roof.
Blow tank dilution feeds new cyclone flush, current cyclone like today, and new dilution valves on suction of pumps.
Blow tank pumps get bigger motors and new impellars
NCG P&ID

14. Consistency WW Tank
Stock Storage Tank becomes the consistency water tank