Reliability of parallel and serial centrifugal pumps for dewatering in mining process

摘要

In the mining process, besides the semiliquid mixture, mud, slurry, and rocks, there are large volumes of water to remove in order to keep production moving. The present paper will determine the application of centrifugal pumps connection in series and parallel form for dewatering in mining industry process. Initially studied the reliability of a centrifugal pumps connection in parallel and serial at a different frequency of rotation (DFR) and flow rates, to measure the behaviour of the head and flow of fluid transported. The process of calculation completed for a different rotational set of frequency for parallel and series connection, the head, hydraulic power, mechanical power, pump efficiency, and net position suction head required calculated in (2200, 2600. 2800 and 3000 [r.p.m]) respectively. The determination of energy efficiency and reliability based limits for the recommendable operating region of a variable speed driven (VSD) are discussed. As well focused to analyse the performance of individual characteristic curves of the serial and parallel centrifugal pumps. The application part considers the suitable operating conditions for VSD controlled pumping system and the basic options for monitoring the flow rate of each parallel and serial pumps. In addition for dewatering mining industry process to transport higher flow rates parallel pumps connection, and for higher discharge heads serial pumps connection are discussed, the head capacity can be increased by connecting more pumps in series, or the flow rate capacity can be increased by connecting more pumps in parallel. As well specific energy consumption of the serial with parallel pumping system could be optimised with individual pump. More results of realising (DFR) and (VSD) in real life of series and parallel systems could be gathered with simulated and experimental system situations. The advantage of pumps connection in parallel and serial configuration guarantee quality, reliability and transport maximum performance at minimum cost.