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Thread: Managing radiation

  1. #1
    Posted on June 09, 2000 at 00:56:06:

    There is a project in which a jetty is proposed to accommodate coal, LNG and other liquid cargo. LNG lines because of their cryogenic condition will always have LNG circulating thru them to maintain the cold temperatures. The trestle is 4 kms long and as such it would not be economical to put up another jetty. It is matter of concern that in the event of a coal fire on the trestle this could damage the other liquid cargo lines. The gap between the conveyor line and the liquid cargo line (near end to near end) is 7 meters.
    Considering wind always blowing from conveyor to pipelines what would be the effect in the following cases.

    Case 1 2 3 4 5 6
    Temp(C) 10 10 10 40 40 40
    Wind speed 0.5 7.5 0.5 0.5 7.5 0.5
    Stability F D A F D A

    In the event a barrier is provided between the conveyor and the pipelines can the thermal radiations be significantly reduced. If yes, by how much and also provide the minimum specs for the barrier.

    Kindly let me know if you could help me out with this problem.

    Thank you

    Dharmavir Jha

  2. Re: Managing radiation

    Posted on July 10, 2000 at 20:54:32:

    In Reply to: Managing radiation posted by Dharmavir Jha on June 09, 2000 at 00:56:06:

    Dear Sir
    We noticed your project involves the loading?unloading
    of coal. We have seveal surplus bulk unloaders
    and stacker-reclaimers for sale. A few are
    very low hours, (one) is unused.
    Capacities range from 4200 TPH to 6200TPH on the
    stacker-reclaimer. Cap. of the bulk unloaders
    is 1500 Tph.
    If we can be of assistance, please feel free to
    contact us, anytime.
    Best Regards,
    Al Goodmundson

  3. #3
    Dave Miller Guest

    Re: Managing radiation

    Posted on June 14, 2000 at 22:26:23:

    In Reply to: Managing radiation posted by Dharmavir Jha on June 09, 2000 at 00:56:06:

    Dear Dharmavir Jha,

    Although I cannot offer you any great experience in fire protection, your enquiry has gone unanswered too long.

    Two likely approaches to the problem are as follows:

    [1] Install half-covers (for the carry side of the belt) and lower wind-break panels on the LNG side of the conveyor. This does not give you any thermal protection, but it would prevent sparks from being blown to the gas lines. It would also give you protection from the wind for the belt and, thereby, improved training.

    [2] Install a block fire wall close to the gas lines and possibly cover the gas lines with screening.

    If you require so0me research done on this, please feel free to contact me.


    Dave Miller

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