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 MintJulep 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: *

  1. thorium1

    Aspen heat exchanger design for diesel vacuum Drier Overhead System

    Diesel, naptha and kerosene are mixtures not pure components. You add the pure components in hysys.
  2. thorium1

    Specifying Feed Limits

    bimr is right on this point. BOD, COD is an important parameter in wastewater treatment, but as the OP is unwilling to share the purpose of the treatment plant, the required effluent parameters as well as the selected treatment types, there is not much to help in that aspect. Damping the...
  3. thorium1

    Need help with PDE

    Perhaps some %comments explaining what you have done will be necessary.
  4. thorium1

    Specifying Feed Limits

    Bee, its common to have limited data. In fact, there can be situations where no data are available, forcing engineers to resort to predictions, common sense, simulations etc. What one does is to give all the info, as much as possible and either make do with it or gather more. That is how it is...
  5. thorium1

    Specifying Feed Limits

    What is the purpose of the treatment? To reduce conductivity only? You only have 10 data points for conductivity?
  6. thorium1

    Heat exchanger control scheme

    To be frank, I cant make heads or tails what you are drawing. I would suggest something more legible for a start.
  7. thorium1

    Remove wax from hot water or mineral oil. 3D Printer support material removal.

    Im pretty sure when people talk about chemical engineering, they are talking about a large scale production plant with reactors, pumps, compressors, columns, towers etc. Not really about more effective ways to remove wax from 3D printer models. (FYI, I like your 3D printer!!! Its so cool!!!)...
  8. thorium1

    How to Remove Foam from Cooling Water Surface

    I think the following website might be a nice read http://www.lenntech.com/processes/disinfection/chemical/disinfectants-hydrogen-peroxide.htm
  9. thorium1

    Flow element in Vertical ?

    It could be that there is not enough space to draw the FE FI FL FT 1333B as well as the top and bottom vents because TG1333C is blocking the way...
  10. thorium1

    Flow element in Vertical ?

    Normally during construction, isometric diagrams will also be used, not just P&ID's. As Latexman explains, P&ID may not show elevation and orientation (unless it is specified in it). It is also not the job of a P&ID to show that. P&ID is mainly to show piping of the process flow together with...
  11. thorium1

    How to Remove Foam from Cooling Water Surface

    I think that thread is in error. If there is no free chlorine residue, that means the biocide dosage is not enough and the treatment was ineffective. Therefore the OP there had no problem with foam before (insufficent microbes were killed to create any noticeable foam) . Due to the prolonged...
  12. thorium1

    Why is the suction pressure to be zero for the submerge pit pump?

    This might be a nice read for you http://85.185.231.196/mekanik/CD_3/pump%20handbook/intaks.pdf
  13. thorium1

    How to Remove Foam from Cooling Water Surface

    The dead organisms can contribute to the foam. When they die, their cell material appears as foam. Could also be pH, how high do you control your pH? What chemicals do you use in the cooling water? Any consultation with the vendors for your CW chemicals? Im sure they will be eager to recommend...
  14. thorium1

    removal of hydrogen from an organic vapor stream?

    perhaps if you detail the composition I might be able to help.
  15. thorium1

    Deaerator level control

    one simple way to solve would be to nerf the steam PCV tuning parameters. The reason is that deaerator levels would have trips associated with them while deaerator pressure is not as critical. The other way is to just place the controllers on manual until the fluctuations die out.
  16. thorium1

    Deaerator level control

    yes kkala, I believe you are right, this problem is unlikely to happen if the water is preheated or the deaerator is large enough or there is enough process noise that it sort off gets masked out. Also, I note that this problem wouldnt be observed if the upsets are small enough. The instability...
  17. thorium1

    Deaerator level control

    This phenomenon is principally created by the cooling effect of the cold water and exacerbated by the lag times for the temperature to rise and for the water to flow through the packings in the deaerator to reach the bottom and be registered as level. Typically preheated water will almost not...
  18. thorium1

    Deaerator level control

    If you dont mind, is it possible to post a trend? It would be useful to see the following trends: Deaerator pressure and level Flow rate of water to the deaerator; the control valve, SP, PV, OP Flow rate of steam to the deaerator; the control valve, SP, PV, OP (I assume the steam is directly...
  19. thorium1

    CO2 removal optimisation

    perhaps you can post a sketch with the relevant numbers like flows etc

Part and Inventory Search

Back
Top