Management Programs/Propulsion Turbines Flashcards
Why is the control of contamination entering a modern boiler critical?
Because of the high rate of steam generation.
What property of feed water contributes to scale buildup?
Hardness
What are boilers also known as?
Trash cans. Everything that enters, stays.
At 50% steaming rate, what will happen to contamination in a boiler?
It will increase tenfold.
What indicator of active oxygen will be present in a boiler?
Scabs
What are the 2 types of boiler water treatments?
Coordinated Phosphate (COPHOS) & CHELANT
By what means does the COPHOS program prevent caustic corrosion in the boiler?
By maintaining the proper relationship between pH and phosphate.
What method removes sludge from the boiler?
Bottom blowdown
Which, if any, of the following treatment chemicals add only the needed phosphates?
TSP
What person must approve the use of caustic soda as a treatment for the boiler?
Chief Engineer
What factor determines whether a boiler is classified as a type A or B under the COPHOS system?
Heat transfer rate
The chelant treatment system keeps contaminants from damaging the boiler by what action?
Bonding the treatment chemicals to contaminants.
The chelant treatment chemicals are injected into what component of the steam cycle?
Directly into the DFT.
Which of the following signal pressures determines the rate of injection of chelant treatment chemicals?
Feed Flow Signal
What treatment chemicals are used on 600 psi boilers?
EDTA, Hydrazine, and TSP
