With the development of science and technology, the application area of ​​pumping solid substances is expanding, such as sewage sludge, mud pulp, ash residue, grain starch, beet fruit, shellfish and so on. There are two main requirements for pumps that deliver these substances: First, there is no blockage and second, wear resistance. The main wear-resistant and material-related, non-clogging depends mainly on the structure of the impeller. Currently as the main structure of non-clogging pump impeller are: 1. Open or semi-open impeller; 2. Swirl impeller; 3. Single (dual) flow impeller; 4. Spiral centrifugal impeller. These non-clogging impeller has its own characteristics, the application is not the same, as follows: Open or semi-open impeller - such as increased wear gap, pump performance decline, and no blockage poor performance, can not transport large particles, long Fiber material Swirl impeller - no blockage performance, good wear resistance, suitable for the transport of large particulate matter, but nondestructive, the destruction of the transport material, capable of conveying gas-containing liquid is not suitable for the transport of long fiber containing material Liquid single-channel impeller - good non-destructive conveying material, non-clogging performance, suitable for conveying large particles of long fiber material, and good wear resistance, but the balance of high demand, poor balance of operation Dual flow impeller - Through capacity is slightly worse than a single runner, but because of symmetrical runner, balanced performance, smooth operation, suitable for high lift, high flow pump Spiral centrifugal impeller - good non-blocking, suitable for containing particles and fibers Material liquid, destructive to the delivery of material, that is good non-destructive, but the balance of higher
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