Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations TugboatEng on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Search results for query: *

  • Users: imans
  • Order by date
  1. imans

    Buffer Gas Spec.

    Dear Eng-Tip'ers, I have a plan to change the buffer gas media for centrifugal compressor from pure H2 with 99.9% purity to H2 rich gas with purity between 92 % - 97 % but I dont have any clue whether the shifting will be OK or not. Does anyone has information on the specification or...
  2. imans

    Steam Turbine Fouling

    Dear Eng-Tips'er, We have problems with our turbine in RCC unit. The steam flow to the turbine is decreasing everyday eventhough the governor has been kept in manual at maximum opening. The turbine is driven by steam produced in RCC catalyst cooler and RCC CO Boiler. Base on the lab result, the...
  3. imans

    Tray Efficiency using Hysys

    Hi guys, I want to calculate tray efficiency using hysys from actual data. What I found was the tray efficiency was an input data not a calculated data. Can anyone give me suggestion to calculate the tray efficiency?
  4. imans

    loss of oil during transportation

    Can anyone help me to give information regarding the acceptable level of oil loss during transportation (by sea tanker)? Currently we use "magic number" of 0.5 % but I dont know where the number comes from. Is there any international standard or any reference on that matter? Thanks
  5. imans

    burner for hydrogen-rich fuel

    Dear Readers, We would like to introduce our excess hydrogen-rich offgas to our fuel gas system. The major concern is the hydrogen content on the fuel gas would be between 50-60 %. What should we do to ensure that our burner is suitable for high-hydrogen service? What is the limitation of...
  6. imans

    COD reduction

    Dear Readers, Does anyone know how to reduce COD from wastewater? What type of chemical compounds can influence COD value? Is caustic soda can influence the COD value? Thanks a lot. Regards
  7. imans

    Tray Damage Detection

    Dear Readers, We have a problems with our Sour Water Stripper operation. Its ability to remove H2S is reduce. We suspect that the tray might have damaged. The column is absorber. It has only pressure tappings on the top and the bottom. I dont have any data of bottom column pressure before the...
  8. imans

    Tank Blending for Crude Oil

    Our refinery was designed with 8o% heavy crude and 20% light crude. We have 4 heavy crude tank and 2 light-crude tank. After couple of years operation, we changed the ratio to 50:50. Due to limited amount of light-crude tank, we blend light crude with heavy crude in heavy-crude tank. Then the...
  9. imans

    Tank Blending for Crude Oil

    Dear Readers, Does anyone have experience with blending heavy crude oil and light crude oil in one tank? How effective is the blending? Is it true that the common practice is a blending light crude with light crude only and heavy crude with heavy crude only? Thank you,
  10. imans

    Sulphur Claus Plant Reliability

    Dear Readers, 1. Does anyone know, how long is a sulphur plant using superclaus claus process can operate continuously at best? We have sulphur plant but its reliability is terrible. Our best record was only 5 months continuous operation. There a lot of modification and material upgrading have...
  11. imans

    Design Life and Coating Selection and Application

    Dear Forum's members, Does any one know what is the influence of design life on coating selection and its application? For example if I want to make an offshore structure with 5 years design life, would the coating specification be different with the one has 20 years design life? What is the...
  12. imans

    LPG(propane plus) recovery from refinery off gas

    Thanks for all your replis. Actually, i want to calculate whether recovering LPG is beneficial or not. I've tried to search the processes using google. Many processes I found were not for refinery application but for Nat Gas.
  13. imans

    LPG(propane plus) recovery from refinery off gas

    Does anyone know technologies/processes for LPG recovery from refinery off gas stream? Is there any specific books or website discussing this topic?
  14. imans

    MDEA problem

    We've tried to reduce the circulation rate but H2S content on the treated off gas increased. All operating condition seemed normal. No foaming was detected.
  15. imans

    MDEA problem

    Our refinery has replaced DIPA with MDEA in the ground that MDEA has better performance in term of degradation due to CO2 and of H2S loading. After three mount what we found was far from what literaturs said and other refiner's experiences. With DIPA, we could achieve 10 ppm of H2S at treated...
  16. imans

    Claus tail gas process modelling

    I have a final year project on tail gas processes selection. Would it be possible to model the tail gas process using HYSYS just to get a rought estimate of energy requirement for each process? I cannot get an access to sulphur recovery software (e.g. SULSIM, CLAUSIM, TSWEET) and my school only...
  17. imans

    Claus Reaction

    I tried to calculate heat of reaction of Claus reaction. Using this reaction 2H2S + SO2 ===> 3S + 2H2O, the reaction is endothermic instead of what should be, which is exothermic. Does anyone know what's wrong with that?
  18. imans

    CE Index for 2004

    I am looking for CE Plant Cost Index for 2004. Does anyone know? Thank you.

Part and Inventory Search

Back
Top