cutter pins, one set of arm pins, one set of keeper pins, one brush with a
set of refills, one tool box, and two 15 meters 50 foot lengths of heavy
duty hose with 20 mm 3/4 inch diameter pipe connections.
2.2.4.11
Wrenches
Provide special wrenches required for proper maintenance of equipment.
2.2.5
Boiler Limit Interlocks
Provide applicable boiler limit interlocks required by MIL-B-18796 and
connect to effect safety shutdown of the stoker [and oil burners].
Interlocks shall be compatible with and integrated into the control and
instrumentation system.
2.2.6
Sootblowers
Provide boiler [and economizer] with a sootblowing system using [steam]
[compressed air] for removing deposits of soot and fly ash from heat
transfer surfaces. Sootblower elements shall be of a sufficient number and
in a proper location to clean every heat transfer surface susceptable to
soot or fly ash deposition. Fixed position, multi-nozzle rotating elements
may be used in applications where flue gas temperatures do not exceed 982
degrees C 1800 degrees F. Retractable soot blowers shall be provided where
flue gas temperatures exceed 982 degrees C 1800 degrees F.
[2.2.6.1
Fixed Position Soot Blowers (Steam)
**************************************************************************
NOTE: Choose this paragraph or the paragraph below,
entitled "Fixed Position Sootblowers (Air Puff)."
**************************************************************************
Steam, fixed position, multi-nozzled, rotating, valve-in-head type with
electric motor operation to permit proper cleaning of heat transfer
surfaces with cam operated valves arranged to automatically open steam
valve through proper arc of rotation. Cams shall be adjustable to give
proper operating arc or shall be specially designed for each location.
Furnish and install soot blowers complete, including valve-in-head blower
heads, wall sleeve bushings, high temperature elements, low temperature
elements, [_____] volt, [_____] Hz, [_____] kW hp motor operators, hand
operated drain valve, with drilled orifice and disc to prevent tight
shutoff, element supports, clamps, bolts, and other required hardware.
Furnish necessary piping and valves including drain lines, shutoff valves,
piping supports and insulation. Weld sootblower piping and fittings. No
screwed piping or fittings will be permitted. Install sootblower elements
with care so that they do not rub on tubes and cause eventual tube failure.
Provide scavenging air connections from forced draft fan where required to
protect blower in non-blowing position. Provide a single control station
containing start and stop pushbuttons and necessary relays to control motor
operators.
][2.2.6.2
Fixed Position Sootblowers (Air Puff)
**************************************************************************
NOTE: Choose this subparagraph or the subparagraph
above entitled "Fixed Position Sootblowers (Steam)."
**************************************************************************
SECTION 15501N
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