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The reasonable selection of slurry pump
is one of the key factors to improve the service life of the pump. The
reasonable selection of slurry pump includes reasonable selection of
pump type, performance parameters, material of overcurrent parts,
sealing type and transmission mode.
1. Selection of pump type
There are many types of centrifugal
slurry pumps. Different types of pumps should be selected according to
the nature of the slurry. Taking the Warman pump as an example, L-type
pumps can be used for low-abrasive slurry with a weight concentration of
less than 30%; High-strength and strong-abrasive slurry pumps can use
AH pumps; when the liquid level changes greatly and needs to work under
the liquid, SP (SPR), KZJL pumps should be used. When high-lift delivery
is required. Choose ZGB, KZJ or HH pumps.
2. Selection of performance parameters
After the pump type is determined, the
head and flow are the basis for selecting the pump size and whether it
is connected in series. For conveying high-concentration and strong
abrasive slurries, the pump's maximum rotation speed nmax (the highest
rotation speed of various rotation speeds in the performance curve) is
generally not selected. It is more appropriate to select a rotation
speed of about 3/4nmax. When the selected pump is at 3/4 nmax, the flow
rate is appropriate but the head cannot be reached, and multiple pumps
can be used in series. For Warman pumps, the flow range must be limited
for different slurries; for high-concentration and strong-abrasive
slurries, the flow rate should be selected within the range of 40-80% of
the pump's maximum efficiency; for low-concentration abrasion slurries,
The flow rate should be selected within the range of 40%-100% of the
flow rate corresponding to the highest pump efficiency. Generally, it is
not selected within the range of 100%-120% of the flow rate
corresponding to the highest efficiency.
3. Head margin
During the operation of the slurry pump, due to the wear of the overcurrent components, the performance of the pump cont.
