When working with balance draft boilers, regardless of the basic process control system or fuel being burned, there are six basic functions that must be controlled: furnace draft, drum level, feed water, fuel, air, and steam temperature.
The basic understanding of boiler operation and control:
- Boiler Components
- Enclosure symbols
- Draft (control)
- Drum Level Control
- 2 and 3 element Feed Water Control
- Steam Temperature Control
- Boiler Swell and Shrink
and I&C Engineer should be able to:
- Describe the boiler components and their function
- Discuss furnace draft, drum level, feed water, fuel, air, and steam temperature
- Describe how the systems interact and how to set up the controls
- Describe "swell" and "shrink"
