The size of the grates and the width of the gaps determine the amount of ventilation, which in turn affects the combustion effect. Different fuels require different amounts of air, and different fuels produce different ashes. Therefore, the selection of the grate and the size of the gap should be based on different fuels.

Burning gangue need to use the grate seam width of 15 to 20 millimeters.

Burning broken coal need to use the grate seam width of 7 to 9 millimeters (because in the burning of broken coal is generally more blower). Burning broken coal, the requirements of the grate ventilation area to be slightly larger, the coal layer should be filled with a thin, good combustion effect.