combustion, water and steam

Formats: Interactive Web, CD-ROM

O V E R V I E W

This interactive training unit is designed to familiarize trainees with the basic principles associated with combustion in a boiler and the flow of air and combustion gases during boiler operation. After completing this unit, trainees should be able to identify the elements needed for combustion in a boiler, explain how fuel is delivered to the burners, and describe the parts and operation of various types of burners. They should also be able to describe the air and gas flow path through a boiler and describe methods used to remove particulates and harmful gases from combustion gases. In addition, trainees should be able to explain when and why vents, drains, blowdown valves, and soot blowers are used.

O B J E C T I V E S

Combustion Equipment

· Describe the parts and operation of typical gas burners, oil burners, and stokers.

Air Flow

· Identify some devices used to improve the efficiency of boiler operations.

· Explain how air flow is produced in a typical boiler.

· Explain why changes in boiler load require fuel and air adjustments.

· State why it is necessary to maintain a proper fuel-to-air ratio in a boiler.

· Describe the parts and basic operation of a typical rotary air heater.

· Explain how rotary air heaters improve efficiency of boiler operations.

Water and Steam Flow

· Explain how natural circulation occurs in a typical water tube boiler.

· Explain how controlled circulation occurs in a typical water tube boiler.

· Describe an economizer, why it is used, and how it improves efficiency.

· Name some devices commonly used to remove moisture from steam and how they operate.

S U B J E C T S

Combustion Equipment

· Gas Burners

· Oil Burners

· Stokers

Air Flow

· Draft

· Fuel-to-Air Ratio

· Air Heaters

Water and Steam Flow

· Boiler Water Circulation

· Economizers

· Moisture Separators