Question 404Steam Plants - 1st Asst/Chief

The correct answer is B) The oil will be discharged through the heavy phase discharge port. When the flow of oil admitted to a disk-type centrifugal purifier exceeds its designed capacity, the centrifugal force generated within the purifier will not be sufficient to fully separate the oil and water. As a result, the heavier water phase will not be able to be completely removed, and it will be discharged along with the oil through the heavy phase discharge port. The other answer choices are incorrect because: A) the speed of the centrifuge will not increase, as the purifier is designed to maintain a constant speed; C) oil will not be present in the water sealing line, as the water phase is being discharged through the heavy phase port; and D) not all water will be retained by the purified oil, as the water phase is being discharged along with the oil.