Recent content by rgrokkam

Dear All, The casting of molten steel into blooms and the rolling process fascinated me as a child but now I am into refining. Can someone enlighten me on the role/job profile of a chemical engineer at a steel plant. Thanks

Dear RogerH How does dosing condensate remove fouling layer? What's the funda behind it?

djack, dcasto- Thanks for your inputs Rgds, rgrokkam

Thanks for your replies. Emmanuel Top-"If one of the exchangers is fouled, reducing flowrate of hot fluid cannot be of much help - simply the turbulence will be reduced, and therefore the overall heat transfer coefficient/rate. Extra amount of duty you get from cleaner exchanger will hardly...

Thanks for your replies. Hi dcasto, I have a series of unknowns- thermal conductivity, viscosity, outlet temperature, fouling factor. "Your exchangers are being coated with coke or salt causing pressure drop and lower heat transfer rates, U." Is there any way of quantifying the decrease in...

Thanks, I seek your comments on the thread below: http://www.eng-tips.com/viewthread.cfm?qid=218659&page=1

Dear All, I've a two heat exchgrs A, B in series. Desalted crude is being heated on tube side with gas oil on shell side. Over a 3month time I observed that 1. outlet temp of crude from exchgr B has dropped 2. pressure drop across B is also high both when compared to A. (Directionally, B is...

Can anyone explain the difference between mCpdT and UAdT..

Dear All, Of late two steam drums in boilers of our power plant have shown cracks during RLI. Can the forum throw some light on the possible reasons for cracks in steam drum and how to go about a preliminary investigation. Thanks

Dear All, I am trying to model a steam-naphtha reformer. I hit a block in searching the rate equations for methane reforming and shift reaction. Googl'ng did help in getting equations but some constants were missing. Any help would be appreciated.

Dear All, I've noticed catalytic fixed bed reactors being heated to specified temperature(start up) by either hydrogen or nitrogen. How can I estimate the time and quantity of hydrogen/nitrogen required to heat the bed to a specified temperature? Also ,what factors go into choosing between...

Dear all, What does transalkylation disproportionation of toluene (stream from Benzene-toluene fractionator) result in? What is the reaction? Thanks

Hello The pictures remind me of the same damage in one of our effluent lines. It was traced to Microbiologically induced corrosion. Any scope for that?

I am interested in studying the effect of mixing. My experiment would be like compare * the reaction in a narrow channel and the reaction in a rotating tube.(no catalyst) In both cases, I will maintain the same temperature, pressure, residence time. Am I overlooking any other important...

Hi, I am new process engineer in refining. Can anyone suggest me link for tools/ softwares to generate process flow diagrams .