Page 41 - Wastewater Solids Incineration Systems

10 Wastewater Solids Incineration Systems

• NFPA 54, National Fuel Gas Code: Applies as a safety code for the installation of
fuel gas systems, equipment, and related accessories (2006b). It governs the
design, sizing, and installation of gaseous fuel systems for incinerators that
use natural gas, propane, or other similar fuel. Items covered include piping
materials, operating pressures, over- and under-pressure protection, need for
shutoff valves, and air for combustion.
• NFPA 82, Standard on Incinerators and Waste and Linen Handling Systems and
Equipment: Applies to installation and use of waste storage rooms, containers,
handling systems, incinerators, compactors, and linen and laundry handling
systems (2004). Much of this standard appears directed at incinerators burning
solid waste. The explanatory material recognizes that there are many different
incineration technologies and designs for burning a wide range of wastes,
from solids to liquids, sludge, and fumes. The standard is not intended to
cover or include all design details for each incineration technology. However,
it includes many requirements that appear applicable to wastewater sludge
incinerators, such as the requirements for auxiliary fuel, air for combustion
and ventilation, incinerator design, placement, and clearances.
• NFPA 86, Standard for Ovens and Furnaces: Applies to ovens, dryers, or furnaces
used for industrial processing of materials and operating at approximately
atmospheric pressure (2007). Of particular interest are the provisions for safety
equipment and application for fuel-firing burners. Although it contains no
direct reference to combustion of wastewater solids, this standard is typically
applied to municipal incinerators. It is used to specify safety equipment and
practices associated with the use of burners, particularly purging requirements.
• NFPA 820, Fire Protection in Wastewater Treatment and Collection Facilities: Estab-
lishes minimum requirements for prevention and protection against fire and
explosions in wastewater treatment facilities (2008b). Addresses hazard classi-
fications for specific areas and processes, including incinerators. This standard
applies to incineration, but generally addresses the requirements for buildings
where incinerators are located as follows:
No requirement for ventilation in the incinerator area. Ventilation is typi-
cally provided for other purposes such as heat removal.
Unclassified area for electrical equipment.
Requires limited-combustion, low-flame spread, or noncombustible
building materials.
Requires a fire suppression system such as sprinklers.