Features and Advantages of Reciprocating Grates

The reciprocating grate is a commonly used boiler combustion device with the following features and advantages:

Structural Features

Grate bar arrangement: A reciprocating grate consists of fixed and moving grate bars in an obvious stepped pattern with a certain inclination, usually 15°-30°, so fuel moves downward under gravity and grate motion. Ventilation gaps: There are longitudinal gaps between grate bars and transverse gaps between layers, forming good ventilation channels. The ventilation cross-section is about 7%-12%, allowing air to enter the fuel layer evenly. Drive mechanism: An electric motor drives an eccentric wheel to move push-pull rods connected to the frame, making the moving grate bars reciprocate forward and backward. The stroke is about 30-100 mm at 1-5 cycles/min, adjustable by motor speed.

Combustion Features

Strong fuel adaptability: Reciprocating grates adapt well to many fuel types and qualities, such as poor-quality coal and biomass. Fuels that are sticky, high in ash and hard to ignite also burn well, whereas chain grates struggle with such fuels. Good ignition conditions: The relative motion between grate and fuel pushes part of the new fuel onto the already ignited hot bed below, artificially improving ignition. Also, as the moving grate returns, it rakes back part of the ignited material…