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Thread: Dust Suppression Problem

  1. #1
    Join Date
    Sep 03

    Chemical jet dust suppression vs Fog jet system vs pain water dust suppression system

    For dust suppression in transfer houses and crusher house of coal handling plant inside power house handling (-) 25 mm coal and fines which type of dust suppression system would be preferable for controlling respirable dust(less than 10 micron)?

    Is fog jet type system (using compressed air) recommended for controlling respirable dust ?
    Would not a plain water type adequately sized suffice for the application? Chem jet type consumes costly surface actants resulting in long term recurring cost.

    Any suggestions on reference matter in this connection.

    G. Ravindra

  2. Dear Ravindra,
    Most issues with dust control can be resolved during the design phase as part of the systems integration.
    In some instances one wants to remove the dust (fines) and separate it from the general bulk flow. If one takes this in consideration, than the layout will be sealed until the separation occurs and the dust will be easy to control with atomizers even spraying water.
    In other instances the dust needs to be contained with the general bulk flow. In this case, often the addition of a liquid creates other problems. It is always best to design integration that minimize leakage, are robust and easy to maintain.
    I'm a supporter of containment, but I realize that in some instances it is expensive or just far from the culture to embrace such effort.

    Antonio Reis
    Vitrom Mfg Consultants
    Your Process and Manufacturing Solutions
    Phone: 209.834.1900
    Fax: 209.834.1039

  3. Dear Mr. Ravindra,

    As Mr. Reis has stated, containment is preferable to suppression -- especially with a combustable material, such as coal.

    If you have the space to install proper containment measures, you can obtain assistance from companies that are involved with that side of the business (Benetech, Martin, etc. - Vitrom may also be an answer).

    If you are committed to using suppression methods like spray, fog, or foam, the most cost effective is to use high surface area methods (i.e. fogging) with a fluid that does not decrease the BTU value of the conveyed material. Because of this, water is not the preferred liquid. You may obtain suitable materials and systems from those companies involved with that side of the business -- an internet search and e-mail enquiries will provide you with suitable sources.

    Before deciding on a suppression system, bear in mind that the one-time cost of chute work is likley to be less-s-s than the chemical approach. The cost of skirting and back seals will be the same with both methods, as you will still need these with a suppression system.

    Dave Miller
    ADM Consulting
    10668 Newbury Ave., N.W.,
    Uniontown, Ohio 44685 USA
    Tel: 001 330 265 5881
    FAX: 001 330 494 1704

  4. #4
    Join Date
    Apr 03
    Benetech GmbH in Germany has extensive experience with dust management . Among others, Benetech GmbH has been a partner of MIBRAG, the largest brown coal producer of Germany for many years now, providing dust suppression for their brown coal mine.
    To find more information on Benetech in general, you may consult the website
    The Benetech Engineering departments will be pleased to help you in finding a solution for your dust management problem.

    Best regards,

    Benetech GmbH
    Karl Liebknecht Str. 27
    D-06682 Deuben near Leipzig
    Tel: +49-34441-445-0
    Fax: +49-34441-445-20

  5. #5
    Join Date
    Jun 03
    Dear Mr. Ravindra,

    As suggested above by Mr. Miller, if you want to use a dust suppression method using spraying and/or fogging then we are the company for you. B+W GmbH in Germany provides Dust Suppression not only using spray nozzles but also through its NALTEC Ventilator Spraying System.

    Information on our NALTEC Systems and other products can be found in the Forum called POWTECH 2004: B+W GmbH or you can go to our website: for more information.

    We look forward to hearing from you and assisting you in solving your dust problems.


    Meta Schweitzer
    Export Manager
    B+W GmbH
    Musfeldstr. 120-122
    D-47053 Duisburg
    Tel: +49-203-55 21 500
    Fax:+49-203-55 21 502

  6. #6
    Hi Mr Ravindra, Fogging sprays or air atomizing sprays can be a cost effective solution at specific transfer points, foam spray systems can cover the entire process. If you wish to keep ongoing costs down then the fogging systems are probably the best bet. We manufacture environmentally friendly additives for use in fogging and misting situations which reduce the surface tension of the water being used and allow the formation of much finer sprays, hence increasing the ability to capture respirable dust. The product I would recommend for use with foggers/ misters is Polo Dust-con, which is used extensively in underground coal mines , typically removing 50 % more respirable dust than water alone. Typical dilution rate is 1 in 3000 litres, so cost is not a huge burden. Check out our site at . or contact me directly at Cheers.

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