توضیحات :
NFPA 8504 – Standard on Atmospheric Fluidized-Bed Boiler Operation
۱۹۹۶ Edition
Chapter 1 Introduction
۱-۱ Scope.
۱-۱-۱ This standard shall apply to boilers with a fuel input rating of 12,500,000 Btu/hr (3663 kW) or greater. This standard applies only to boilers using atmospheric fluidized-bed combustion.
۱-۱-۲ This standard covers firing of individual or blended fuels. Where multiple main fuels are fired, additional interlocks and other provisions shall be required but are not covered by this standard.
۱-۱-۳ This standard covers burners and lances associated with fluidized-bed boilers.
۱-۱-۴* This standard is not retroactive. This standard shall apply to new installations and to major alterations or extensions that are contracted subsequent to the effective date of this standard.
۱-۱-۵ Furnaces such as those of process heaters used in metallurgical, chemical, and petroleum manufacture, wherein steam generation is incidental to the operation of a processing system, are not covered by this standard.
۱-۱-۶ Since this standard is based upon the current state of the art, its application to existing installations is not mandatory. Nevertheless, operating companies are encouraged to adopt those features of this standard that are considered applicable and reasonable for existing installations.
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