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  • Users: MatthewL
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  1. M

    Dew point for RNG

    Hi all, It's been a while since I've checked in, but I have a question about water dew point in a RNG (renewable natural gas) stream. I did read the related posts, but none of them seemed to deal with the kinds of pressures and low water content I have. We are capturing landfill gas and...
  2. M

    Plate and frame HX modification

    I am looking for some confirmation of a few calculations I am working on. Right now, we use a plate and frame heat exchanger with water on both sides to cool process water using either cooling tower water or chilled water. I took some readings on a recent run using tower water, and here were...
  3. M

    Vacuum system issues

    All, Looking for some insight into a problem at the plant I work at. We use a three ejector + vacuum pump on our reactor during polyesterification of block polyether/polyamide. Typical vacuum is around 1.5 to 3 mmHG absolute at the vessel. Recently (in the last month or so), the vacuum is no...
  4. M

    Small vessel pressure transfer help

    Hi all, looking for some design help with a proposed change. We currently have a small (~3 gallon) additives tank on an upper level used for small charges to ~1000 gallon premelt vessels. The tank is pressurized with 60 PSI N2 to transfer the contents (RO water and additive) to the premelt...

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