The basic process for selecting a slurry pump is crucial for enhancing the pump’s lifespan. In general, the selection process involves the following steps:
Selection of Pump Type:
Choose the basic pump type based on the application, installation location, available space, and the nature of the pumped fluid.
For low-abrasion slurry with a solid concentration below 30%, consider using an L-type pump.
High-concentration and highly abrasive slurry may require an AH-type pump.
For applications with significant variations in liquid level and the need for submersible operation, consider an SP (SPR) pump. ZGB pumps are suitable for high-lift transport requirements.
Selection of Pump Performance Parameters:
Determine the appropriate performance parameters based on the overall system requirements.
For transporting high-concentration and highly abrasive slurry, avoid using the maximum pump speed; choose a speed around 3/4 of the maximum for optimal performance.
If the selected pump provides suitable flow but insufficient head, consider using multiple pumps in series.
Limit the flow rate based on the nature of the slurry; for high-concentration abrasive slurry, choose a flow rate within 40–80% of the pump’s maximum efficiency flow.
Fine-tuning Pump Components for Specific Conditions:
Select materials for the wetted parts of the pump based on the characteristics of the transported slurry (particle composition, size, shape, hardness, concentration) and chemical properties (acidic, alkaline, oily).
Choose the appropriate shaft seal type, considering factors such as stuffing box seal, expeller seal, or mechanical seal, depending on the application requirements.
Consider adding a head margin of 10% to the rated head to ensure the pump operates near its rated conditions for an extended period.
Consider various drive systems such as V-belt, elastic coupling, gear reducer, hydraulic coupling, variable frequency drive, and thyristor speed control.
Prioritize cost-effective and easy-to-install options, such as elastic couplings and V-belts.
The pump selection process should be guided by the specific characteristics of the slurry and the operational requirements. Following these steps ensures not only optimal pump performance but also longevity, reducing maintenance and replacement costs.
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