Negative-pressure carbon monoxide (CO) drainage method, system and equipment for coal face

The invention relates to a coal face carbon monoxide (CO) negative pressure drainage method, system and equipment, and relates to the field of coal mine production safety, the method comprises the following steps: determining a target negative pressure drainage flow according to the air passing amount of an air return corner, the target negative pressure drainage flow being greater than the air passing amount; determining a target pipe diameter of a drainage pipeline according to the target negative pressure drainage flow and a preset flow velocity parameter; according to the pipeline resistance of the drainage pipeline, target drainage negative pressure of a negative pressure drainage device is determined, and the target drainage negative pressure is larger than the pipeline resistance; setting a drainage system based on the target pipe diameter and the target drainage negative pressure, wherein the drainage system at least comprises the drainage pipeline and the negative pressure drainage device; and negati