Sample Conditioning in CEM applications

SIZE DOES MATTER!!!!!!!!!

Don’t let anyone tell you that size is not important, especially when it comes to impinger tubes. That’s right, impinger tubes, the things in the TE chillers that the sample flows through. Lots of new systems are using “the works in a drawer” approach to sample conditioning. Now it may work or it may almost work, chances are it’s the latter. One of the big problems with works in a drawer is precisely that, the chiller has to fit in a drawer. You can accomplish this several ways, you can lay the chiller down (not a great idea) or you can use shorter impingers (also not a great idea). If you lay it down liquid will most certainly form inside the tube and scrubbing will occur. The tube was designed to be standing up not laying down. That brings us to the next option, shorter tubes. Shorter tubes can be positioned so that moisture actually does form and drain at the bottom but to fit a 10 inch impinger (pretty much industry standard) that’s got to be one big draw! So the second best thing is to use 5 inch tubes, and I do mean second best. Shorter impingers mean the sample has less time to be purged of moisture. So to increase the amount of time the sample has to be dried we have to slow the flowrate down. When we do this the first thing that happens is it takes longer for the sample to make it through the systems which kills our response time. Another thing that happens is we increase the pressure that the gas has to be dried at, systems with undersized  chillers usually operate at five to ten psi. Now I am not a rocket scientist but I think when I squeeze something I can usually fit more of it in the same space. So if this hypothesis is correct then when I pressurize a sample I think it will contain more moisture than if the pressure was lower. This boggles me, I can see that increasing resonance time will help to remove moisture but on that same note, when I increase pressure don’t I also increase moisture content? It seems the more I know, the less I understand! Our new systems rack have full size chillers that are panel mounted but slide out for access as if they were draw mounted. You don’t have to undo one line or connection to access every sample conditioning component. Our 19 inch rack can replace complete system enclosures without sacrificing user friendliness. The rack holds analyzers, I/O panel, sample conditioning panel, all temp controls, all I/O interfaces and alarms, basically everything except the computer and printer. These racks can be configured basically with the same logic that exist in your current system. This means the change out from old to new does not have to be dramatic, and best yet, your current software for the most part will not have to be changed or reconfigured. We will build our I/O interface with your current software in mind, of course you can always upgrade if you like. Contact us for more information, use whatever or whoever’s analyzers you prefer or  leave the choice to us, flexibility is built into these racks!