1. Power Plant Construction and QA/QC Section 2.4– Boiler Auxiliaries
Engineering Technology Division
Power Plant Construction and QA/QC
Section 2.4– Boiler Auxiliaries

2. Overview Introduction Burners Igniters Fans Air Heaters
Section 2.4– Boiler Auxiliaries
Overview
Introduction
Burners
Igniters
Fans
Air Heaters
Fuel Prep and Handling
Pulverized Coal
Stokers

3. Auxiliaries allow more heat to be produced.
Section 2.4– Boiler Auxiliaries
Introduction
Auxiliaries allow more heat to be produced.
Minimizing heat loss is key to maximizing output.
Efficiency is the key to generation.
Combustion needs oxygen so airflow is key to heat production.
Fuel type and size is key to combustion rate.
Sizing of Auxiliaries is critical.

4. Power Output MW Turbine Steam Flow Temperature and Pressure
Section 2.4– Boiler Auxiliaries
Introduction
Power Output MW Turbine
Steam Flow Temperature and Pressure
Boiler Capacity
Auxiliaries
Under Capacity
Over Capacity
< Desired MW
Maximum Operation
Wasted Costs
Wasted Energy

5. Burners Fuel Natural Gas Oil Coal Dust Quantity Boiler Size
Section 2.4– Boiler Auxiliaries
Burners
Fuel
Natural Gas
Oil
Coal Dust
Quantity
Boiler Size

6. Section 2.4– Boiler Auxiliaries
Igniters - Gas

7. Section 2.4– Boiler Auxiliaries
Igniters - Oil

8. Igniters - Combination
Section 2.4– Boiler Auxiliaries
Igniters - Combination

9. Section 2.4– Boiler Auxiliaries
Fans –Boiler Supply

10. Section 2.4– Boiler Auxiliaries
Fans –Boiler Exhaust

11. Air Heaters Air Temperature Air Density Boiler Heat Boiler Efficiency
Section 2.4– Boiler Auxiliaries
Air Heaters
Air Temperature
Air Density
Boiler Heat
Boiler Efficiency

12. Fuel Prep and Handling - Coal
Section 2.4– Boiler Auxiliaries
Fuel Prep and Handling - Coal

13. Section 2.4– Boiler Auxiliaries
Crushed Coal

14. Section 2.4– Boiler Auxiliaries
Pulverized Coal
50 um ”

15. Section 2.4– Boiler Auxiliaries
Stoker

16. Section 2.4– Boiler Auxiliaries
Questions?