manzoor-elahi

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  • in reply to: Over speed test (OST) steam turbine #99673
    manzoor-elahi
    Participant
      • Participant

      Dear
      Over speed test is of two types one is by the governer and other is from over speed module.You have to perform both test for safety of machine.Normly First tripping is by gover and second is by over speed trip module 20 rpm higher than gover tripping
      Increase speed to gms by governer automaticaly than control speed manualy as speed reach governer trippoing speed machine wil triped by governer
      Restart machaine and check overspeed module for this activity you have to cross governer triping speed to reach over speed module setting for this purpoose you to enable over speed tip from governer by pressing it at governer panel to reach over speed module setting .
      Precaution
      If machine is not triped by over speed module relise trip button to trip machine by governer for safety of machine

      manzoor-elahi
      Participant
        • Participant

        Dear,
        plz check n/c for LPCC(recovery section) if n/c is ok than check h/c.If you are adding water in recovery section as per material balance and still concentration is higher it may be due to low co2 converstion or higher vent valve opening for synthesis sectin.

        in reply to: CO2 Compressor Urea Plant #97409
        manzoor-elahi
        Participant
          • Participant

          Dear Mr Naseem,

          I think it is very simple if you have any cooling media that can decrease co2 temperature you can decrease except third suction.you already know that for a longer period we operate co2 compressor with 10c 1st suction temperature.
          thanks

          in reply to: CO2 compressor speed #97156
          manzoor-elahi
          Participant
            • Participant

            I think that ur hp governer is pasing its maximum steam plz check governer valve capacity .Try to reduce speed to keep hp governer valve in controlling range.If hp governer is fully open speed will vary with co2 pressure variation from ammonia palnt.If hp governer capacity is within range than check hp gorner valve lift if any variation adjust the left in runing condition by adjusting link between hp actuater and hp governer valve.

            in reply to: Stopping of Ammonia Boost up Pump #96251
            manzoor-elahi
            Participant
              • Participant

              dear akbar i think we can apply this without any problem if we modify the logic as sometimes the ammonia pump from storage may cavitate so we have to use low pressure switch at the suction of ammonia feed pump for the auto start of ammonia booster pump to avoid any damage to pump

            Viewing 5 posts - 1 through 5 (of 5 total)
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