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  1. steveen

    absorber column

    What is it you desire? Your note is hard to understand. Do you want a hydrocarbon equilibrium curve to predict liquid formation? Steveen.
  2. steveen

    Crude Tower Flash Zone

    see lieberman's book or give him a call. If you have any pride however, try a literature search first. Norm tends to be a little short.
  3. steveen

    PRO- II beginners help

    This is found in the Thermo section selection.... Stick with it -- Pro II has a steep learning curve -- almost a cliff, but after about 2 weeks you will come to appreciate how powerful a program it is. AND DO NOT HESITATE TO CALL THE HELP DESK!!!! TYPICALLY THEY ARE EXCELLENT>>>>
  4. steveen

    The Calculation for Piping Pressure Drop

    If this is a single loop, calculation can be estimated well by hand. See Crane Handbook "Flow of Fluids" for calculation of pressure losses via nomograph. Assume x flow through loop and Y direct. Calculate losses and adjust flow until you get a match.... Same as CDG above. Actually setting...
  5. steveen

    geo thermal well filtration problem

    Solubility of salts is based on temperature and PH. Salts will fall out at a lower temperature and dissolve at a higher temperature. How will the equipment change the temperature? Will the removal of CO2 change the PH? Bench tests will help....Also check with some people who run geothermal...
  6. steveen

    Choose a process simulation model.

    Annie, ProII is one of the easiest to learn!!! The graphical user interface and the ability to put exchanger data into a spreadsheet makes this program a lot easier to put refining and most chemical processes through a lot of "what-if" situations... I have used HCOMP, HYSIS, ASPEN and PRO-II...
  7. steveen

    Hysis

    Tickle, So True, problem is most users do not recognize garbage out..... Always sit back and ask -- Does this make sense? General rules... Bottom of towers are almost always hotter than the top. What comes out had to go in. Neopentane does not occur naturally in concentrations larger than...
  8. steveen

    Increasing condenser water pump head

    chasbean1, Your comment of vortex not being a problem is not entirely correct. The presence of a column of air in water (the vortex) will quickly drop the average weight of the column of water (over the piping inlet.) Hence, NPSHa will drop quickly when the vortex extends down into the basin...
  9. steveen

    Problem with pickling of pipes

    Chris, For the possible salvation of your career, get something in writting from your specialists before the test run. Smoking ruins cause everyone to clam up.... VOE (Voice of experience -- and how I came to be an expert) HAVE A PLAN FOR THE SCREEN... Either it is a permanent fixture with...
  10. steveen

    ejector design

    faranaz77, Reconsider using a siphon system and submersible pump. At least run through a power consumption calculation.... Include your heating loss for the steam piping to get to your location... Give me a call on Tuesday 713-204-3615 if you need some help with either the steam eductor or...
  11. steveen

    Hysis

    ali2u, I had a bad copy of HYSIS and couldn't get it to perform with any stability on my operating system. Two months later we finally got it running. So if you have having problems with it running consistantly complain loud and often... My problem was in March 2002, so hopefully the...
  12. steveen

    Tower Design Vacuum

    sshep, Relief devices are rated by upstream pressure, and DERATED by built up back pressure. A lower MAWP for a vessel can require large diameter piping downstream of the relief device. You should consider the cost of the system, not each piece. Stonecold's observation of 50 psig and full...
  13. steveen

    Preparing new pipes for service

    Stonecold, Check with Praxair's sandjet technology. Uses nitrogen and sand. Leaves a bright metal surface which can be followed by a epoxy liner....
  14. steveen

    Increasing condenser water pump head

    What is the temperature of the water to the pump? The water is saturated with air and the frictional loss to the pump is so high that at the pump suction is 16" of mercury vacuum. You are most likely cavitating the pump due to lack of NPSH available and the evolution of air from the water...
  15. steveen

    ejector design

    I have used small steam eductors just for this purpose. To drain water out of a sulfuric acid tankfarm sump. They worked well, were available from vendors such as Granger. However, consider the cost of the steam to move the liquid. If you are moving a large volume of water, I suggest you...
  16. steveen

    Radiation & Convection Heat losses

    J alvarez, The coating applied is a ceramic based type. There are two important benefits. 1. Heat flux increases and tube wall temperatures are cooler. Important on certain units. 2. The ceramic coating keeps the surfaces pristine. There is very little loss of heat flux due to fouling of...
  17. steveen

    Natural Gas Metering Options

    Fizzle, Check out V-cones. Very accurate and repeatable. http://www.mccrometer.com/products/pdvcone.htm They are less expensive, but do require corrections for pressure and temperature. They also do not require extensive upstream and downstream piping runs. On my installation, they...
  18. steveen

    reducing turbulent flow around an elbow

    Did you check with tray manufacturers? there may be some internals to properly distribute the gas across the cylinder. And consider the use of a long radius ell, if space permits.
  19. steveen

    Incinerator operation

    Low quality water? Is it deaerated? Pitting is indicative of o2 attack. See jalvarez reply above. Sounds like you are quenching a hot gas stream with a copious amount of water. Calculate your O2 balance
  20. steveen

    Problem with pickling of pipes

    Don't know the system, but get your specialists to comment on the pressure loss across the screen. Is it a permanent installation or just a "start up" screen?. Recommend a procedure be written and reviewed with the specialists. Inquire as to what experience other locations have had with...

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