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    • 10. 发明公开
    • FOULING TYPE DETECTION
    • EP3685908A1
    • 2020-07-29
    • EP19153157.3
    • 2019-01-22
    • NOV Process & Flow Technologies AS
    • LIAN, Pei, LingYOON, Jae, Myung
    • B01D61/02B01D61/12B01D65/02C02F1/44
    • Filtering system comprising
      - at least a first and a second stage membrane filter,
      - wherein the first stage membrane filter has a first stage feed inlet, a first stage permeate outlet and a first stage retentate outlet,
      - wherein the second stage membrane filter has a second stage inlet, a second stage permeate outlet and a second stage reject retentate outlet,
      - wherein the first stage retentate outlet is in fluid communication with the second stage inlet,
      - wherein the system comprises pressure sensors (P1, P2, P3) for determining the differential pressure between the first stage feed inlet and the first stage retentate outlet (dP A/B ) and for determining the differential pressure between the second stage inlet and the second stage reject retentate outlet(dPc),
      - wherein the pressure sensors are in data communication with a data processor,
      - wherein the data processor is configured to estimate a first slope of the differential pressure between the feed inlet and the retentate outlet from the first stage (slope dP A/B ), and a second slope of the differential pressure between the second stage inlet and the second stage reject retentate outlet (slope dPc); and
      - wherein the data processor is configured to identify fouling and to compare the estimated first and second slopes and thereby determine the type of fouling; and
      - wherein the data processor is adapted to recommend or actuate a preselected cleaning action for the type of identified fouling.