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. willem79

    Minimum flow over Carbonbed adsorber

    Oke, So let me het this streight. An average carbon bed will not show hotspots (under normal operation and good handling)if we keep average vapour velocity in the bed above 200mm/sec? Or is there a margin to this? Thanks anyway (to al you guys for giving me your thougts) becouse I'me starting...
  2. willem79

    Generic curve for a centrifugal blower

    Hi all, Could anyone get me a generic cappacity v.s. head curve for two centrifugal air blowers. An experimental correlation would be of great help to me. The first blower I need it for has a working point at 14500 m3/hr with diff. head 8.96 kPa, 60 kw motor. The type is MAEB 400-v according...
  3. willem79

    VOC absorption

    oops sorry for that... Oke I know a little about those two. We looked at the possibility to replace an old carbonbed adsorber by a scrubber (absorber). These thing normally get you a 90% removal rate. If designed realy good and at a turndown of less than 1:3 you could get to 95%. Not enough for...
  4. willem79

    Pressure drop through an adsorber

    what do V and V2 stand for?
  5. willem79

    VOC absorption

    Autch, Benzene... thats a tricky one (is perfectly solluble in water by the way, but a scrubber only solves one problem by creating another). here in Holland we have a lot of clients (I work for an engineering company) who have to addapt to new legislation bij 2010. venting at max 1 mg...
  6. willem79

    Centrifugal Pump Head

    What kind of impeller is it? for instance: retracted(vortex pump) or closed or open... And can you find out what the impeller speed or range of speed is, that might be of interest when constructing a correlation. @Bradshsi: do you also have experience with experimental correlations for...
  7. willem79

    Nitrogen blanketing of Canola Oil tanks

    I'd install a separate n2-header appart from the relief header for safety. Keep a bit of oversize on the relief header. Also it's easier to abate oxygene when n2 comes in through the tank instead of the same way oxygene might have come. Your choice of one pvrv on a header sounds propper for a...
  8. willem79

    Centrifugal Pump Head

    @ Artisi: measuring static water head in a tube is a valid way of calibration that is more reliable and precise than any common pressure guage or theoretical approach. By the way, when peeing up a wall factor in velocity head and crosswind:) @ bradshsi: Euler is fun, I'll give you that, but...
  9. willem79

    Minimum flow over Carbonbed adsorber

    We've got all sorts of goodies such as benzene, mek, phenol, toluene and many more. But i think thf and cresol are the worst for flamability. On the other hand Benzene has the highest mass flow and heat of adsorption.
  10. willem79

    API 2000 or 2557: Vapour treatment flow calculation

    Yes, it is a methanol vapour recovery system. Methanol is not "recovered" though in the sence of reusing it but disposed of. When i calculate thermal + pump-in outbreathing according to api2000 section 4.3, the flow is 3 times that we see on any tank elsehwere in the company or any vapour...
  11. willem79

    Multistage restriction orifice calculation

    So once implemented the series of RO's did not sort the pressure drop you wished? This might be the case if the RO's are placed to close together. trailing the RO the flow patern peaks in the center of the pipe (radial flow distribution is normally parrabolic but can show more of a...
  12. willem79

    Minimum flow over Carbonbed adsorber

    Thats true and already done. I'll try to further explain my prediciment. At the point where the VOC laiden air enters the bed, the VOC conc (not offered amount) and available facing bed surface dictates the amount of VOC's absorbed creating a more or less fixed amount of heat while the volume...
  13. willem79

    VOC absorption

    What kind of VOC's are we talking about and in what way do you want state of the art? maybe the most important: to what concentration do you want to reduce?
  14. willem79

    Minimum flow over Carbonbed adsorber

    Weve got an adsorber for VOC's in tank ofgas, nothing special. I want to raise the caloric value for a downstream RTO by (partially) bypassing the adsorber. During normal operation, the flow of air and vapour through the carbon helps to remove heat by convection. I was warned that very low air...
  15. willem79

    N VALUE QUESTION

    n could also just be the moles... Cp,m = (dC / dn)p or Cv,m = (dC / dn)v see: http://en.wikipedia.org/wiki/Specific_heat_capacity
  16. willem79

    Multistage restriction orifice calculation

    take into account that some free length befor and after the orrifice is needed to ensure propper operation. Why go for a multi stage device anyway?
  17. willem79

    Centrifugal Pump Head

    typo: pump graph should be pump curve. in a pump curve you set out flow against pump head. now I come to think of it my previous answer can be done simpler if you can connect two hoses to the discharge end. read of waterkolemn height of one that is held to high for outflow (discharge...
  18. willem79

    Centrifugal Pump Head

    dPh = rho * g * h for shutof head. this means your liquid is standing stil and no pressure is lost to pipe-(hose) friction. Once water comes out the other end you can find the pump discharge pressure by: P2 = P1 - dPf - dPh. P2 = the pressure at the other end (1.014bara) P1 = your pump...
  19. willem79

    Centrifugal Pump Head

    typo, sorry that should be 0.0979 bar/m water kolom
  20. willem79

    Centrifugal Pump Head

    A gardening problem... hmmmz try connecting a gardenhose and hold up (1st or 2nd floor) the other end. when no more water comes out, the difference in height from the pump to the top of liquid in the hose is your shutoff head (in meters water kolom (0.9881 bar/m). than by timing the outflow...

Part and Inventory Search

Back
Top