Durable, energy-efficient slurry pump for phosphoric acid plant operations

08 February, 2024

Increased productivity

Due to the modular construction of the new AHLSTAR WPP, only worn parts of the pump must be replaced. In the earlier pumps, the lifetime of the parts subject to the highest erosion and corrosion was very short, between 3 and 6 months. Along with the pump replacement, the average lifetime of the parts was increased to 12 to 24 months, reducing the maintenance frequency by up to 75% from what it used to be.

Given the harsh operating conditions and the vast improvements compared to the former installation, the replacement is considered to be very successful. After a few years in operation, the pump has proven to be such a major upgrade that more pumps at the site are replaced with AHLSTAR pumps.

For further information please visit https://www.sulzer.com

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Technical details

The pump is installed in the attack reaction unit where it is connected to the digestor. It feeds the slurry filter with phosphoric acid slurry produced in the reactor.

Application - HH slurry filter feed pump

Liquid - Reaction slurry with HH solids

Flow / head - < 170 m³/h/< 35 m

Pump type - AHLSTAR WPP53-100

Material of construction - Cast wetted parts in 654 SMO®

Nominal speed - < 850 (rpm) (VSD)

Lubrication - Oil

Installation - Horizontal (common baseplate)

Motor - 75 kW – 440 V – 60 Hz

Transmission - Flexible coupling

Mechanical seals - Dual mechanical seal SE2

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