توضیحات :
NFPA 8505 – Standard for Stoker Operation
۱۹۹۸ Edition
Chapter 1 Introduction
۱-۱ Scope.
۱-۱-۱ This standard shall apply to boilers with a heat input rating of 12,500,000 Btu/hr (3663 kW) or greater. This standard shall apply only to boilers using a stoker to fire the following fuels:
(a) Coal, as defined in Chapter 3
(b) Wood
(c) Refuse-derived fuel (RDF), as defined in Chapter 3
(d) Municipal solid waste (MSW) as defined in Chapter 3
(e) Other solid fuels
When solid fuel is fired simultaneously with other fuels (e.g., solid fuel stoker fired in combination with gas, oil, or pulverized auxiliary fuel), additional controls and interlocks might be necessary; however, these are not covered in this standard. When firing gas, oil, or pulverized fuel alone, the NFPA standard that applies to that fuel shall be used.
۱-۱-۲ Requirements for auxiliary fuel-firing equipment and interlocks shall comply with NFPA 8501, Standard for Single Burner Boiler Operation, or NFPA 8502, Standard for the Prevention of Furnace Explosions/Implosions in Multiple Burner Boilers.
Exception No. 1: The purge requirements of NFPA 8501 or NFPA 8502 shall not be required when the stoker is firing and the boiler is online. In those cases, if no cooling air is being provided to the auxiliary burners, a purge of their associated air supply ducts shall be provided.
Exception No. 2: When firing oil or gas in a supervised manual system in accordance with NFPA 8501, the excessive steam pressure interlock shall not be required.
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