When the flow of oil admitted to a disk-type centrifugal purifier is in excess of its designed capacity, which of the following conditions will usually occur?
• Operation of a disk-type centrifugal purifier (heavy phase vs light phase discharge) • Effect of overloading flow rate on separation efficiency • Role of the water seal and how oil/water boundaries shift when capacity is exceeded
• Think about what happens inside the bowl when the oil flow is too high for proper separation. Does separation get better, worse, or stay the same? • If the interface between oil and water is forced inward or outward by excess flow, which discharge (heavy or light phase) is more likely to be contaminated or to change its normal content? • Consider whether bowl speed is fixed or variable in normal purifier operation, and whether excess feed flow affects speed directly.
• Identify which outlet is for heavy phase (water/solids) and which is for light phase (oil) in a purifier. • Decide whether a higher-than-designed flow will cause loss of separation (mixing phases) or simply change mechanical speed. • Check how the water seal behaves if too much oil is fed—does it disappear, move, or cause one phase to come out the wrong discharge?
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