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

Engineering Technology Engineering Technology DivisionDivision

2

Overview

Section 2.4– Boiler Auxiliaries

• Introduction

• Burners

• Igniters

• Fans

• Air Heaters

• Fuel Prep and Handling

• Pulverized Coal

• Stokers

3

Introduction

Section 2.4– Boiler Auxiliaries

• 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

Introduction

Section 2.4– Boiler Auxiliaries

Power Output MW Turbine

Steam Flow Temperature and Pressure

Boiler Capacity Auxiliaries

Under Capacity Over Capacity

Wasted Costs

Wasted Energy

< Desired MW

Maximum Operation

5

Burners

Section 2.4– Boiler Auxiliaries

• Fuel

• Natural Gas

• Oil

• Coal Dust

• Quantity

• Boiler Size

6

Igniters - Gas

Section 2.4– Boiler Auxiliaries

7

Section 2.4– Boiler Auxiliaries

Igniters - Oil

8

Section 2.4– Boiler Auxiliaries

Igniters - Combination

9

Fans –Boiler Supply

Section 2.4– Boiler Auxiliaries

10

Section 2.4– Boiler Auxiliaries

Fans –Boiler Exhaust

11

Air Heaters

Section 2.4– Boiler Auxiliaries

Air Temperature

Air Density

Boiler Heat

Boiler Efficiency

12

Fuel Prep and Handling - Coal

Section 2.4– Boiler Auxiliaries

13

Crushed Coal

Section 2.4– Boiler Auxiliaries

14

Pulverized Coal

Section 2.4– Boiler Auxiliaries

50 um - .002”

15

Stoker

Section 2.4– Boiler Auxiliaries

16

Questions?

Section 2.4– Boiler Auxiliaries