Air Distribution Methods for Chain Grates

Chain grate air distribution follows these principles:

Low air supply at the front and rear sections, high air supply in the middle section.

Specific characteristics and principles:

Combustion zone distribution characteristics

Fuel combustion on a chain grate is zoned along the length: the middle section is the most intense combustion zone, requiring more air to support the combustion reaction; the front and rear sections, where fuel is in the preheating or burnout stage, need less air.

Air distribution design purpose

Air supply method under special structures

If the boiler adopts a D-type layout or dual-grate structure (such as left-right separation), it may only support single-side air intake.

Summary

The chain grate achieves efficient combustion through staged air distribution, with the core being a “more in the middle, less at both ends” air supply pattern.