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S! Actually I've found out that Texas demands a 3 days capacity sour water tank in order to stabilize the Sour Water Unit feed stream.

Folks, is there any regulation over the residence time for a stabilization tank for a Sour Water Stripping Unit? EPA has guidelines for it? Regards

Please, can someone indicates a CO analyzer for a high purity hydrogen stream (product of a PSA unit)? The resolution needed is in the ppm level. Thanks

S! Hi, Maddocks. You did get the idea. Dräger tubes can be used for estimates, however I don't know how it reacts in H2S stripper top gases. In the catalog is not clear how the concentration of the species interfere (H2S and NH3) in the result. It's said that the indication is not affected by...

S! Hi, Maddocks. You did get the idea. Dräger tubes can be used for estimates, however I don't know how it reacts in H2S stripper top gases. In the catalog is not clear how the concentration of the species interfere (H2S and NH3) in the result. It's said that the indication is not affected by...

S! Hi, is there any method for determining H2S and NH3 in the gas stream of a sour water unit, specially a 2 towers plant? I wish to evaluate the amount of NH3 that is being carried over from the H2S stripper to the SRU's. Best regards [cheers]

S! Folks, is there any standard, calculation or rule of thumb that specifies the minimum purge gas flow for instrumentation and flame detectors in furnaces? In some applications, like sulphur recovery units, this can be crucial, because if the flow is low, sulphur/ash may deposit in the sensor's...

S! In a sulphur recovery unit was found greenish sulphur in one of the seal legs. The SRU process acid gas from a Sour Water Stripper and a Amine Unit. There are suspicion of ammonia contamination from SWS or even DEA from Amine unit. Anyone faced similar problem?

S! I have to estimate the flow rate of purging gas, air in this case, to keep some sighting glasses and instrumentation wells in a furnace. An older engineer told that is necessary to keep a superficial velocity (flow rate/internal area of the pipe) equals to 1 m/s, but he is not sure about this...

S! BigInch, my issue is with volume to mass conversion of a liquid sulfur tank.:-) Flow properties, in this case, are not my concern. Regards

S! Thanks!:-)

S! Anyone knows/has the variation of liquid/molten sulfur as a function of temperature? Cheers

S! The drum is leveled with reboilers. Thank you. Cheers.

S! Hum, I see. Here we have a composition of the alternatives. The heat duty control loop uses a cascade control. The steam inlet (t/h) sets the set point of the level in the condensate drum. The level control manipulates the condensate's outlet valve. What would be the main mechanism behind? Thanks

S! I'm kind lost about the principles behind a thermosiphon steam reboiler. I'm mean: when it's necessaty to increase the heat duty, normally, in a steam flow/reboiler level cascade control strategy, the set point of the reboiler level is decreased. The resulting increase of heat duty is...

S! I'd like to know if there is on line analyzers for detection of silicon compounds in hydrocarbons stream, such as naphtha and Diesel cuts. What is the analytical method used for such analysis? Best regards

S! We are facing problems due to the presence of ammonia in the top stream of the DEA Stripper on the DEA system of a FCC unit, the one rich in H2S. I wonder the origin of the ammonia? Could thermal degradion leads to ammonia formation? Best regards

S! Thanks a lot, guys.

S! I'd like to know how can I calculate/estimate the air flow through a butterfly valve as a function of the rotation angle/opening. The catalog comes with the Cv as a function of rotation angle. Can I use the sizing equation in terms of flow, not in Cv?