Section 2: ACI

Question 1

1. What is the purpose of the ACI system?

Answer 1

The ACI controls the mercury levels in the flue gas/ash

Question 2

2. How would you check to see what the level of the ACI silo is?

Answer 2

You can check the silo levels on the DCS

Question 3

3. How many trains do we have and where do the go?

Answer 3

6 trains total
3 trains per silo
They blow carbon into the ductwork where the flue gas and ash flow through

Question 4

4. What all do you check in the blower room?

Answer 4

Check oil levels
Check belts
Check for heat and vibration
Check for leaks on the inlet filter

Question 5

5. What can you check on the monitor screen?

Answer 5

Flow rate
Tank level
Suction pressure
Blower discharge
Mercury level

Question 6

6. When should the ACI system be put in service?

Answer 6

Anytime the unit is burning coal

Question 7

7. How many ACI silos do we have and which silo feed Unit 1, Unit 2 and Unit 3?

Answer 7

2 silos
West Silo feeds Unit 1
East Silo feeds Units 2 and 3

Question 8

8. Do the silos have different Carbons and if so, what is the difference?

Answer 8

West Silo – Unit 1 – Uses FastPack Carbon

East Silo – Units 2 & 3 – Uses PowerPack Carbon