A pulp pump, also known as a two-phase flow pulp pump, is a hydraulically designed conveying machine that utilizes the "relative suction, relative blockage" principle of two-phase flow theory. This design ensures that the hydraulic performance of the pump's flow components conforms to the laws of solid-liquid two-phase flow, thereby reducing scouring and wear of the flow components by the pulp and improving the pump's efficiency and service life. Pulp pumps are primarily used for conveying pulp with a concentration below 6%. As a general-purpose conveying equipment, they are also widely used in sugar refining, urban sewage treatment, chemical, mining, metallurgy, and power industries.
Pulp pumps feature significant advantages such as high efficiency and energy saving, excellent cavitation resistance, long service life, high-concentration, non-clogging operation, reasonable structure, and convenient maintenance. Their operating efficiency is on average 3-10 percentage points higher than ordinary pulp pumps, saving 15-30% in energy consumption. Their actual service life can be increased by 2-3 times, and they can convey pulp concentrations up to 6%. The pump head adopts a front- and rear-opening structure, allowing for disassembly and maintenance without disassembling the pipeline; simply moving the motor backward is sufficient for disassembly and maintenance.
Based on the concentration of the pulp being pumped, pulp pumps can be classified into low-consistency pumps (concentration %), medium-consistency pumps (7% ≤ concentration %), and high-consistency pumps (concentration ≥ 16%). Common low-consistency pumps can be further classified according to their impeller structure into open/semi-open pumps, single/dual-channel pumps, vortex pumps, and spiral centrifugal pumps, etc.
