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Recent content by NPKresults

  1. NPKresults

    Corrosion, Erosion or Both?

    The Chevrons and mesh are polypropylene, housing is FRP.
  2. NPKresults

    Corrosion, Erosion or Both?

    Thank you all for your excellent recommendations and expertise... Ed - Do you mind elaborating a bit on the epoxy? we had an epoxy on this guy to start with and as you can see it wasn't worth a nickel... I am not very experienced with epoxy options and I would like an outside opinion. Also, how...
  3. NPKresults

    Corrosion, Erosion or Both?

    Thank you all for your thoughts. Attached is a picture of the damage, I should have posted it earlier. Metengr- Is stellite a sprayed or welded coating? We wanted to try a paintable ceramic epoxy but the balancing issue continues to haunt us. I also spoke with our Sermatech rep about it and...
  4. NPKresults

    Corrosion, Erosion or Both?

    There is HF in low concentration, also H2SiF6. We have not decided the base at this point but figure NaOH for now. So the resultant would be NaF and Na2SiF6. I know the acids will eat the heck out of carbon steel, especially in low concentration, however the blades appear to be more eroded...
  5. NPKresults

    Corrosion, Erosion or Both?

    Hello All, Problem: My fan is being eaten alive. Fan Description: 5' Diameter Radial Blades, 465fps tip speed, carbon steel blades Process Description: The fan is downstream of a wet scrubbing system, complete with mist a multistage mist eliminator (chevrons and mesh). The mist eliminator...
  6. NPKresults

    Condensate from stack

    Ok so my Heat & Mass teacher would be embarrassed at my previous question, I found the necessary information using Nusselt Equations for Heat Transfer to Fluids with Phase Change. However if anyone has a more practical rule of thumb for stack condensation I would love to hear about it. Also...
  7. NPKresults

    Condensate from stack

    Hello all, I am looking for a way to calculate the amount of condensation formed in the air discharge stack. There will be two air streams exiting the stack: 1) 20,000 ACFM, 137F, Saturated, 3' Diameter Duct 2) 40,000 ACFM, 162F, 50% RH, 3.5' Diameter Duct For calculation purposes I want to...
  8. NPKresults

    spraying/ coating bulk solid while conveying

    Coating Drums are an option often followed for granular material, you described the material as 'powder'. Can you tell us a little more about the material? particularly size? In addition to rotary coating drums you may consider a mixing screw conveyor or high intensity mixer of some sort...
  9. NPKresults

    pelletizing waste

    What types of animal waste are you concerned with? Typically animal manures contain only small amounts of the 'big three' plant nutrients; N, P, and K. Composted chicken manure (dried slowly to retain the elements) typically contains the best analysis at about 2.8-2.8-1.5 (except guano of...
  10. NPKresults

    Fluoropolymer Lining, 300F

    Kenvlach, Thank you for your information. I have contacted whitford regarding the issue. At the moment I have decided to go with a specialty FRP shell as I have information that it has been used with success and it is much more economical. As for the mixer blades I plan to coat them with either...
  11. NPKresults

    Fluoropolymer Lining, 300F

    Thanks Demon3. The company I am thinking of using is called Sermatech. Do you have any thoughts on insulation? The lining will be going on a carbon steel shell, are there any guidlines you could give me concerning the steel temperature vs. adhesion? Are there any surface treatments I should be...
  12. NPKresults

    Fluoropolymer Lining, 300F

    Hello, For an upcoming process mixer we are looking to line the vessel with a fluoropoymer. The problem is that due to heat of reaction, the operating temperature will be about 300F. Most people have declined to quote, stating that although the material can take the heat, there is problems with...
  13. NPKresults

    Guided Wave Radar in Agitated Tank

    HEC, thank-you for elaborating. The fluid is to be scrubber effluent containing particulate. Although it will even out eventually, it will change from 1-1.25 during start-up and upset conditions. I spoke with the E+H rep and have decided to go with an un-guided wave radar. He said that the H/P...
  14. NPKresults

    Carcass Content

    Boole, Animal Tankage has been documented to contain 9%N and 6%P, as for micronutrients and other items of value I am not sure. But I do know that if you manufacture the bone and blood (steamed bonemeal, and dried blood meal) the items are much more profitable to organic fertilizer...
  15. NPKresults

    Guided Wave Radar in Agitated Tank

    Thanks to all for your info: ItDepends/pleckner: I will be in contact with the E+H rep. Unfortunately I am limited to using Siemens or E+H. HEC: Would all the sensors be on one 'probe stick' or would I have to introduce 2-3 entire instruments to the tank? Also what are your thoughts on how H/P...
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