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  1. CFSE001

    Water-tube boiler economizer contains water on flue gas side

    davefitz: Please see my new posting so that the discussion is directly relevant to the applicable thread.
  2. CFSE001

    NFPA 85 - Is there a Low Air Flow Trip at < 25% full-load air flow

    As late as 2001, the boiler code trip diagram clearly indicates a low air flow trip at < 25% full-load air flow in Figure 4.9.3(b) Boiler Trip Logic. However, the 2004 and current 2007 code is much less clear about this issue stating “low combustion air flow below the permitted limits shall...
  3. CFSE001

    Water-tube boiler economizer contains water on flue gas side

    With the exception of 7.6.2.2.6.1 in NFPA 85-2007 for fluidized-bed boilers can you cite the requirement for 25% MCR min startup air flow?
  4. CFSE001

    Water-tube boiler economizer contains water on flue gas side

    To: davefitz Thanks for the 25% MCR posting. Can you provide more information concerning this 1961 incident? Are you suggesting that this incident was the basis for the addition of 25% MCR minimum air flow to NFPA 85? If so, why wouldn't maximum air flow during the purge cycle clear the...
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