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Thread: Buildup on duct walls

  1. #1
    Associate Engineer
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    Buildup on duct walls

    during a manufacturing process, hot air flows through a duct carrying fine particles of a glutinous substance. With time, those particles stick to the walls of the duct and create a thick layer on them. This layer reduces the cross-section area of the duct, changing the velocity of the flow. To remove this layer, the flow has to be stopped.

    Any ideas of how to remove the layer without having to stop the flow? Or to prevent the buildup of the layer?

    685dacd198.jpg
    Last edited by Kelly_Bramble; 01-17-2014 at 09:19 AM. Reason: Attach image directly

  2. #2
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    Can't it be filtered before it goes through the ducts? maybe even something like a wet collector?

  3. #3
    Technical Fellow Kelly_Bramble's Avatar
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    Quote Originally Posted by khalednasr View Post
    fine particles of a glutinous substance.
    glutinous = sticky?

    Are there any materials which the substance does not stick to? If so see if it is possible to coat the ducting with this material (e.g. PTFE).

  4. #4
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    Is this duct be utilized to transport a material or is it a vent?

  5. #5
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    Thank you all for your answers

    Quote Originally Posted by GlennD View Post
    Can't it be filtered before it goes through the ducts? maybe even something like a wet collector?
    We've tried filtering and it was unfortunately not very effective.

    Quote Originally Posted by Kelly Bramble View Post
    glutinous = sticky?

    Are there any materials which the substance does not stick to? If so see if it is possible to coat the ducting with this material (e.g. PTFE).
    That might works. thanks

    Quote Originally Posted by JAlberts View Post
    Is this duct be utilized to transport a material or is it a vent?
    The duct transports the material.

  6. #6
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    I think providing support under the heavy points is better option in this situation and above members had good thinking about the topic which is on the front of our eyes. According to my opinion it's duct transport material.
    Last edited by DavidO1; 01-20-2014 at 11:47 PM. Reason: Link was to load cells.... Nothing to do with question.

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