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  1. smile1

    Treatment of hard water with polyphosphates

    BIMR makes the best case, and if you followed his advice, I would see few problems. Check that deposit for Aluminum though. Fine thread!!
  2. smile1

    high conc fluoride removal

    with a pH of 2, lime will be expensive, although that is the typical method. Levels below 1 ppm are typical with lime at a pH of 7. I can only assume that the waste stream is to be recycled in the plant, with a pH of 2.
  3. smile1

    neutralizing amine for high pressure steam

    WTP03, Betz calls their program REGENAMINE. The technology is very good. You would be best served by surveying your condensate system prior to experimenting. You may get unexpected results. Amines are used in distinct ratios, based on their DR and neutralizing capability and their recycle...
  4. smile1

    Fatality in Water Valve Manhole

    It seems clear that KRSServices has provided the correct, if not concise, cause of the incident. Certainly we all agree that a manhole meets the requirement of a confined space entry. Certainly we all agree that oxidation occuring within the manhole consumed oxygen such that the space was...
  5. smile1

    neutralizing amine for high pressure steam

    WTP03: Neutralizing amine costs are a function of condensate return and amine recycle. Your polisher removes all amine from the condensate, so there is no recycle. A viable alternative is to regenerate your polisher with an amine, and thereby reduce your amine costs significantly, perhaps by...
  6. smile1

    Demineralized Water Piping

    Demin piping is stainless steel because of the corrosiveness of demin water. Pressure rating is another requirement that will determine system design.
  7. smile1

    neutralizing amine for high pressure steam

    How high pressure? Neutralizing amines have very few process side effects, if you use the right distribution ratio and feed locations.
  8. smile1

    Ozone/bromine vs. chlorine dioxide

    A couple of thoughts....using reject water from the RO system by itself means high chemical costs for corrosion and scale control. If you are trying to squeeze more use out of your water, there are better approaches. Gas Chlorine is the best biocide for high alkalinity and high volume water...
  9. smile1

    Belt Conveyor Pulley Question

    The head roll requires more belt contact for friction to pull the belt. Sometimes a re roll is installed to give more than 180 degrees of contact. The tail is freewheeling. Keith
  10. smile1

    pH of 4.0 in deionized water ?

    I cannot comment on the RO membrane contribution, but before you invest in new resin, make absolutely sure that there is no leakage around the anion bed. A pH of 4 is trivial in low conductivity water, and may be a miniscule amount of untreated water bypassing the anion bed. Physically break...
  11. smile1

    Water quality for greenhouse

    The ions removed are only calcium, magnesium, and alkalinity. When the water is sprayed, the CO2 of course enters the air, where it is available. Thanks for the reply,
  12. smile1

    Product buildup in Surge Hopper

    Material handling is my company's focus, so I'll take another stab at this. Product flow problems can be static, where the particular product, the transfer line, or the holding bin are allowing static to accumulate in the product. This is generally the problem with light (30 pcf) plastic resin...
  13. smile1

    Product buildup in Surge Hopper

    Sounds like static. The coating acts as an antistat. Solutions are changing the convey lines, humidifying the convey air, and adding an antistat.
  14. smile1

    Anyone heard of PowerPure from Chardon Labs?

    Learned friends, A water doctor friend of mine tells me that his plant is about to install a PowerPure system from Chardon Labs, and I was hoping one of you fine folk would have some information on this device. The idea is that either makeup or cooling tower water is circulated through this...
  15. smile1

    Water quality for greenhouse

    My company makes a water pretreatment system that produces water with very low calcium and high levels of dissolved CO2 from high conductivity water. Is this something that would be useful in the large commercial greenhouse market? Is there anything good or bad about this quality water for plants?
  16. smile1

    variable speed pumps

    VFD's are cheap now, as the others said, and reliable. I like Toshiba. Keep in mind that they can't go as low with the same torque as a DC drive though.
  17. smile1

    How to recover carrier gas after reducing catalyst?

    Quickstepper, consider using multistage radial blowers. They can handle dust well, and can give up to 12 psig delta on each one. Temperature rise may be an issue in the final pressure/temperature, although the blowers can generally handle up to 300C. Use an intercooler between stages, keep...
  18. smile1

    Baffled Tank - Residence Time

    Well, if you design the baffled tank to plug flow velocity, the residence time will be very close to that of a plug flow reactor. so, flowrate / baffled tank volume = 15 min. Typical designs would be a racetrack assembly, similar to that in a lagoon. Depending on the size, you may just want...
  19. smile1

    Baffled Tank - Residence Time

    You might want a second opinion on sterilizing the hot water. I've had bio grow where there was no way it could survive. 85C might kill the bugs your trying to grow, but not all of them. If there is an available surface, something will grow.
  20. smile1

    baghouse fines recycling

    The first step is an analysis of the fines. Typically, the baghouse fines are a selective set of compounds, usually ones that will interfere with the overall performance of the final product, and not just smaller particles of the starting material. Usually you will see high levels of sulfur...

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