Bulk Tankers & Aeration

Discussion in 'Tanker, Bulk and Dump Trucking Forum' started by Oso, Oct 12, 2015.

  1. Oso

    Oso Light Load Member

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    I've noticed that some bulk tankers have aeration lines going to the bottom of the hopper. My company doesn't use those - we haul plastic. What kinds of products require bottom aeration?
     
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  3. old skool_boyz

    old skool_boyz Bobtail Member

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    Any ash, lime dust the more powdery material it will stick to the sides and rat hole if you only use top pressure
     
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  4. realdesertkickin

    realdesertkickin Heavy Load Member

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    Id say everything can use aeration...Id bet your trailers uses fluffer or vibrator? somehow air has to infiltrate the product right? you not just sending a log of plastic out the back right?Your sending aerated plastic out the back/bottom..


    Id say were all doing the same thing, just different configs

    Could be wrong tho
     
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  5. Cheap Weenie

    Cheap Weenie Light Load Member

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    It's very common for vac trailers dedicated to plastics to not have vibrators/aerators. Plastic is extremely sensitive to contamination and aerators are an easy place for product to get trapped and contaminate the next load. All it takes is a tiny crack in the rubber and you've got a huge-money problem on your hands. It can also cause melting around the aerator if your intercooler isn't totally keeping up. Besides, plastic pellets and powder unload great with top air only, so it's not worth the risks.
     
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  6. Oso

    Oso Light Load Member

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    Is plastic less sticky than lime dust or other powdery materials?

    And yes, we do move a lot of powdered plastic using top aerators only.
     
  7. RockinChair

    RockinChair Road Train Member

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    Yep. The heavier the product, the more important aerators are. Pads are for granular product, and top air is for light, fluffy product like hydrated lime.
     
  8. Oso

    Oso Light Load Member

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    What are pads?

    We use top air for plastic pellets as well. (ie granular product.)
     
  9. wis bang

    wis bang Road Train Member

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    Some trailers use an air pad instead of a flo-cone. Cement hoppers used pads. J model Fruehauf had a flat bottom and a side outlet. the hopper bottom [lid] made an air chamber under the pad and shook the cement out the side... PD bulk railcars can work the same way...

    Google 'airslide' and see some of the first hoppers that looked like double conical tankers, same system was used in railcars.
     
  10. realdesertkickin

    realdesertkickin Heavy Load Member

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    Wow, neat to know...be lookin to see what you say next
    I dont know enough to bring a question!! LOL

    My place has so many configs on thier blower trailers, so many (it seems) valve configurations etc etc..A bit intimidating as I put myself out there as an 'everything guy' LOL
    Really need to know, well....everything if possible

    I got my place covered though...cement, flyash, lime, sand etc etc, all the standard hauls...Never using top air (trained not too!)..But now im out there, I see guys giving it a little...Assuming to cut back on unload time

    Gosh, all the food crap too? Flour? Chocalate? Jello!!!!
    Man , im gonna need more training..lol
     
  11. Oso

    Oso Light Load Member

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    Wait - you use bottom air only? How common is that?

    We split the line air and top air about 50/50. Some guys will cut back on the line valve - but no more than half - usually less. For powder we don't pre-pressurize the tank.
     
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