The kiln head exhaust fan is a specialized negative pressure ventilation device for the flue gas emission system of the grate cooler at the kiln head in a new dry-process cement production line. Installed after the kiln head dust collector and before the chimney, it is responsible for extracting the cooling exhaust gas (after dust removal and purification) discharged from the grate cooler and releasing it into the atmosphere or transporting it to the waste heat recovery system, ensuring stable negative pressure and compliance with environmental standards in the kiln head area.