The high-speed rotation of the centrifugal impeller ejects the pulp, creating a negative pressure at the impeller center, which draws pulp into the impeller chamber through the feed pipe. The pulp is then ejected centrifugally, filling the entire tank, suspending solid particles, and raising the liquid level until it flows out through the overflow pipe, achieving lifting capability. Used when there is insufficient pulp height difference between equipment or when the difference is too small to use a pump.