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...
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...
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?
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
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...
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
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...
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...
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,
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...
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...
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.
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.
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...
