Improvements and cost reduction of chamber filter press feed


Coal continues to be an important raw material. Speci­fically in Poland, the majority of energy is generated by converting coal into electricity. Mining operations have to use the most modern technology in order for this process to run as efficiently as possible. The Pniówek Processing Plant operates 9 chamber filter presses with 570 m3 of filtration area each.

Before modernization, 2 centrifugal pumps were used for press feeding which were consuming 560,000 kWh/year of energy. Added to this were repair costs of approxi­mately 27,000 Euros annually. In 2012, the investor decided to change the existing sys­tem and reassess the requirements and objectives of the filter press feeding modernization project, most important of which was to reduce energy consumption and extend intervals between repairs.

In December, 2012 Pro-Industry Sp. z o.o. Sp.k commenced the task and created a modernization pro­ject, which was implemented and at the beginning of 2013. The new filter press feed system added an Abel positive displacement pump in parallel with the existing centrifugal pump. This arrangement sought to improve overall efficiency by allowing the centrifugal pump to work within its optimal flow and pressure curve while shifting the higher pressure duty to the Abel PD pump. The pump model HMD-G-50-0500 was selected for its abrasion resistant piston-diaphragm design and its ener­gy efficiency. This pump performs at the capacity of 50 m3/h and a pressure of 15 bar.

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