A pulp pump, a type of pump specifically designed for transporting pulp, operates primarily based on the principle of centrifugal force.
The core of a pulp pump's operation lies in its high-speed rotating impeller. When the motor starts and drives the impeller to rotate at thousands of revolutions per minute, the pulp between the impeller blades is subjected to centrifugal force and rapidly thrown towards the edge of the pump casing. During this process, a low-pressure zone forms in the center of the impeller, while a high-pressure zone forms at the edge of the pump casing. The low-pressure zone continuously draws in new pulp, while the high-pressure zone pushes it out, thus achieving continuous circulation and transport of the pulp.
Pulp pumps handle fiber suspensions, which flow in a three-phase (gas-solid-liquid) manner. The flow mechanism is complex, influenced by factors such as pulp type, concentration, flow velocity, freeness, temperature, and fiber morphology. This makes their working principle significantly different from that of ordinary centrifugal pumps used for conveying clean water.
