Is there anyone out there with any input on sprinkl.ering trommels? The only thing I can find is NFPA 850 (2005) section 9.4.4.2 which states, "Classifiers/trommels, such as rotating screens, should be provided with water spray protection to prevent fire from propagating downstream through the screen. Systems should be designed for a minimum of .25 gpm/sq ft of the entire screen area with nozzles no more than 10 ft on center. Consideration should be given to avoiding physical damage from mobile equipment operation in the area and from material being processed."
Having never done one before, it seems that there is nowhere inside the trommel container to put heads where they are not exposed to flying debris. This particular trommel is elevated off the floor >10' and there is sprinkler protection below designed at .25 density with the overhead system designed at .25/3000 per NFPA 850 section 9.4.4.4. Also, is there any significance to the phrase 'water spray protection' and 'nozzles' as this seems to allude to a deluge system. A wet system designed per above will already be in place protecting everything outside the trommel. Is a design as indicated adequate, or should I go to the booth for a review as should have been done last night? Thank you in advance for any input, Ryan L. Hinson, EIT, CET, Nicet III FP Design Manager Fire Construction Design Services, LLC #C124 A Division of Fire Construction Services, Inc. 6950-43rd Avenue SE St. Cloud, MN 56304 Direct: 320-250-5404 Fax: 320-358-3495 email: <mailto:[email protected]> [email protected] CONFIDENTIALITY NOTICE: The information contained in this message, including any files transmitted within, is confidential, may be legally privileged, and is intended only for the use of the individual(s) named above. The use of any confidential or personal information may be restricted by state and federal privacy laws. If this message was received in error, please notify the sender and then delete this message. _______________________________________________ Sprinklerforum mailing list http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field)
