Induced Draft (in a Boiler)

Definition

Induced Draft in a boiler system refers to combustion air being drawn through the burner or fuel bed by a power-driven fan located in the flue, enhancing combustion efficiency.

Purpose

Induced draft systems improve combustion control and efficiency by ensuring a steady and controlled flow of air through the boiler, optimizing fuel use and reducing emissions.

Examples of Use

• Enhancing combustion in industrial boilers to improve energy efficiency.
• Controlling air flow in power plants to maintain optimal operating conditions.
• Using induced draft systems in large commercial heating systems for better fuel economy.

Related Terms

• Forced Draft: A system where combustion air is pushed into the burner by a fan.
• Combustion Efficiency: The measure of how effectively a boiler converts fuel into usable heat.
• Flue Gas: The gas that exits to the atmosphere via a flue, which includes combustion products.

Notes

Induced draft systems are essential for modern boiler operations, particularly in large-scale industrial and commercial applications where efficiency and emission control are paramount.