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  • Users: Falcon03
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  1. Falcon03

    Heat Exchanger Design aspect

    Thank you all for your good comments.
  2. Falcon03

    Heat Exchanger Design aspect

    What are the differences between a counter-current and co-current exchanger for design aspect point of view? The main reason for my question is, we are thinking to change the Debutanizer exchanger hot stream side to avoid further corrosion. The current configuration is a counter current and...
  3. Falcon03

    Parallel Pump Calculation

    How can I calculate my pumps performance in parallel conditions? In our LPG system we have two pumps (motor/turbine), usually motor pump is running most of the time. The common discharge line will split into tow streams one to rundown (LPG to storage) and the other one back to the column as a...
  4. Falcon03

    Wet H2S

    Hello Everybody, How I can define if such service is a wet H2S service? Is it as a function of partial pressure of H2S at given temperature and pressure? What is the definition of Wet H2S service (wet sour gas)?
  5. Falcon03

    Minimum suction pressure

    In our FCC unit we have a variable speed centrifugal wet gas compressor, the suction pressure is in the range of (0.7 to 0.9) barg (1.7 to 1.9 barA). My question is what will be the effect if we try to run at lower suction pressure? Below 0.65 barg. In other word, is there is a minimum suction...
  6. Falcon03

    Head Calculation

    Our strategy is to minimize feed inventory, one example we are currently running with three FCC charge pumps in order to maintain the required feed throughput into the unit. The current Tank level is 9.8 meter and we would like to reduce the TK level to 6.7 meter, my question is what will be the...
  7. Falcon03

    Dew Point Calcualtion

    Hello ALL, I'm trying to calculate the dew point temperature on the FCC Fractionators tower in order to know where we stand; our top pressure is fluctuating between 0.7 to 1.1 barg. We also have noticed that the pressure drop across the overhead fin fan banks has increased from 0.20 to 0.5...
  8. Falcon03

    Steam Turbine Fouling

    Thank you all for your feed back, Ok let me give you some history, sorry if I wasn't so clear well. As I mentioned above that three years ago the Turbine post pressure (presure indication located on the third turbine stage) start increasing gradually which means that there is some deposit is...
  9. Falcon03

    Steam Turbine Fouling

    Td2k, Based on the nalysis we have it seems to me it is related to steam quality !!! We have consulted Nalco to do steam quality study and try to foucus in the WGCT.
  10. Falcon03

    Steam Turbine Fouling

    The frequency of our FCCU Wet Gas Compressor turbine fouling has increased sharply this year. We have conducted an online cleaning three times this year compared to two times last year. Please note that in Year 2001 we only cleaned it ONE time. Does any body has/ had experience such a problem...
  11. Falcon03

    Freeze Point

    Is possible to calculate Kerosene Freeze point? vs analyzer prediction.ý
  12. Falcon03

    Washing of the Amine Absorber OnLine

    Sure63, Sorry may be I wasn't clear. Forget the story about the Three Amine Absorbers. My question is Can we clean the Amine absorber on line?
  13. Falcon03

    Pressure Drop Across The Tower

    Hello All, What do you expect the pressure drop across the tower reading if you have damage Trays (sieve/valve trays) ? HIGH OR LOW ? Crude tower was opened for inspection and we found more than 10 valve trays are damaged !!!! we haven't seen any big changed on produtc quality (HGO).
  14. Falcon03

    Washing of the Amine Absorber OnLine

    Dear Friends, In our refinery we do have three big Amine Absorbers. Two of them have the ability to bypass them and do an online hot water wash and chemical wash, this is incase if we notice any increase in DP across the Absorber and or Amine carry over to K.O. drum. The other one has NO...
  15. Falcon03

    Positive Heater Draft

    Hello, The main reason for my question is, in our visbreaker heater the screen (FOX1A) shows that we have a good draft but when I checked the convection section on the heater side I noticed that we do have a positive draft (hot gas coming out ). We realized that we do have a damper problem and...
  16. Falcon03

    Pump Around Duty

    What is the most effective way to improve fractionation in Distillation tower (Crude tower), is to increase the PA return temperature or / and to drop the PA flow rate in order to lifting of material below the PA section to improve Freeze as an example?
  17. Falcon03

    Viscosity Correlation Calculation

    Let me add, I will use the correlation for the Fuel blend calculation. tks
  18. Falcon03

    Viscosity Correlation Calculation

    Hello, I would like to have some sorts of correlation to calculate the Viscosity at different Temperature, since we measure our Viscosity for Heavy Fuel Oil @ 50 °C. I would like to know the expected viscosity at 100 °C. Thank you.
  19. Falcon03

    Positive Heater Draft

    Hello there, What is the effect of having Positive Draft in the convection section?
  20. Falcon03

    Velocities across Heat Exchangers

    What is the minimum velocity across the heat exchangers? We are planning to utilize one our heat exchangers (mainly out of service) to cool MHFO (Marine Heavy Fuel Oil) products since the current MHFO coolers is under size due to increase in unit throughput. So to maximize cooling we are...

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