centrifugal pumps have a wide range of performance
Centrifugal pump is widely used in chemical industry system general-purpose fluid machinery. It has a wide range of performance (including flow, pressure head and the conveyed medium nature adaptability), small volume, simple structure, easy operation, low operating cost and other merits. Usually, the selected centrifugal pump flow rate, pressure head may be different from pipeline requirement, or because the production tasks, technological requirements changes, requiring the pump flow adjusting, essence is changing centrifugal pump operating point. Centrifugal pump operating point is jointly determined by pump characteristic curve and pipeline system characteristic curve, therefore, change any of the characteristic curve can achieve the flow adjusting purpose. At present, the centrifugal pump flow regulating ways mainly have the regulator control, variable speed control and pump parallel, serial adjustment, etc. Because different principles of all sorts of regulating modes, except its own advantages and disadvantages, causing the loss of energy is also different, in order to find the best, minimum energy consumption, most energy-saving flow regulating mode, we must fully understand the relationship between centrifugal pump flow regulating mode and energy consumption.
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2012-07-09
