Many customers wonder: we choose a centrifuge with max. 30cbm capacity, why the real capacity is far more less? Is it the centrifuge un-certified? Similar to a car, the car manufacturer will give a max. speed of the car can reach, but actually, it can never reach it. It widely depends on the drivers skill, the road condition, the speed limitation, the requirement of people in the car, and so on. And centriguge is the same.
To answer this question, we should know the exact meaning of Centrifuge Capacity. On decanter centrifuge data sheet, there are different description for treating capacity: Max. capacity, typical capacity or a performance chart. Typical capacity is more widely used to specify the centrifuge performance. The Typical Capacity on centrifuge data sheet is gaven under a certain condition, it is not for general condition.The mafanucturer will give description of it.
Mostly, centrifuge manufacturer give typical max. capacity as hydraulic test. As different jobsite have different mud condition. For different mud density and viscosity, the centrifuge handling capacity is much different. It is difficult to compare parameters for customer if the max. capacity is under different condition.
Below are somes reasons may affect centrifuge performance:
1) Centrifuge size : the bowl diameter and bowl length
It is the main parameters to affect centrifuge capacity. Normally speaking, the bigger of the bowl size, the bigger of centrifuge max. capacity (hydraulic test). But it is not meant big bowl centrifuge is the best choice for bigger capacity. Customer should consider the material condition, the result they want to get after separation to choose the suitable model. For different mud condition, specially for drilling waste management, different centrifuge model suits.
2) The mud condition before centrifuge treatment
The mud condition have big effect on the centrifuge real capacity. For centrifuge with hydraulic test 30cbm, with mud, capacity may half reduced or even more. And the heavier of the mud, the smaller the capacity.
3) The parameter settings of the mud
The bowl speed, conveyer speed and the fluids outlet height setting will also affect the centrifuge capacity and the centrifuge performance. So when the centrifuge arrived jobsite, per customers detailed request, GN Solids control company recommend customer to test with their real mud to find out the best separation result, the max. capacity of the centrifuge under this condition. Or they find an equal of capacity and separation result.
4) The performance result customer choose will also affect the capacity. Just like a car, if you want very smooth driving, the speed should not be as high as normal.
For professional users, they can have an idear about the real capacity of centrifuge from data sheet manufactuere give with their rich experience. But for most customers, it is better to have more communciatios with the centrifuge manufacturer, let them know more of your project, to make sure a suitable centrifuge model.
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Published: 25 April 2015