Centrifugal pump matched with press filter, and impeller thereof

Abstract

The invention provides a centrifugal pump matched with a press filter, and an impeller thereof. The centrifugal pump comprises a pump case, a pump cover, a main shaft and the impeller on the main shaft; the impeller comprises an impeller center plate, blades on the center plate, and center holes fixedly installed with the main shaft of the centrifugal pump; and the blades on the surface of the center plate are a plurality of direct blades perpendicular to the surface of the center plate around the center of a circle radially, and the blade heights are gradually increased from the periphery ofthe center plate to inside. The centrifugal pump has the advantages of high flow rate at the feeding stage of a press filter, high pressure at the pressurizing stage, low matching power and high energy-saving efficiency.

Description

technical field [0001] The invention relates to a centrifugal pump for a filter press, in particular to an impeller for the centrifugal pump. Background technique [0002] Abrasion-resistant centrifugal slurry pump is a commonly used delivery pump for feeding and pressurizing plate and frame filter press. The basic process is as follows: the slurry to be filtered is transported and filled into the filter chamber of the plate and frame filter press through the centrifugal pump. Squeeze out the moisture. For materials that are difficult to filter, the plunger or cylinder can be further activated to pressurize the filter cake. [0003] Commonly used centrifugal pumps have the following deficiencies when used with a filter press to feed and pressurize: First, within about 20 minutes of the initial feeding, when the pressure in the plate and frame filter press is ≥0.1MPa, a large flow input is required Slurry, which can speed up the feeding speed of the plate and frame filter ...

AI Technical Summary

Problems solved by technology

[0003] Commonly used centrifugal pumps have the following disadvantages when used with a filter press to feed and pressurize: First, within about 20 minutes of the initial feeding, when the pressure in the plate and frame filter press is ≥0.1MPa, a large flow input is required Slurry, which can speed up the feeding speed of the plate and frame filter press and shorten the feeding time

However, this method also has the disadvantages of large equipment investment and complicated operation process; another method is to use a high-power, large-scale centrifugal slurry pump to achieve the purpose of large-flow filling, while the filter press with a small flow During the compression period, the centrifugal pump is in a stuffy pump state with small flow, low pressure, and low efficiency. The disadvantage of this method is that the equipment investment cost is high and the power consumption is wasteful.

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