Screen Wash Flashcards
1
Q
Describe screen wash system
A
Bar racks- big filter for debris
Traveling screens- smaller filters for debris
Screen wash pumps- press for washing screens
Refuse trough- accepts debris washed off screens
Muffin monster- grinds up debris in refuse trough
Traveling screen drive- VFD various speeds 4 screens
2
Q
Precautions and limitations for Screen wash system?
A
- at least two screen wash pumps avail always
- CWP not operated if more than one of its screens not avail (3 total)
- do not rotate traveling screens w/o spray valves in
3
Q
Auto start for traveling screens?
Auto stop?
A
Spring/summer. 15 min/ 4 hrs
Fall/winter. 45 min/ 3 hrs
8” d/p
<8” d/p for > 15 min
4
Q
Different speeds of traveling screens?
A
Low 10 fpm (5.4-ASW)
Hi 20 fpm (10.8-ASW)
Auto/jellyfish 10-30 fpm (5.4-10.8 ASW)
