05-06M
building intake air.
10 BOILER PLANT HEAT RECOVERY:
10.1 Provide heat recovery devices when they can be justified by a life cycle
cost analysis. Systems include (1) flue gas economizers for each boiler and
(2) continuous blowoff heat recovery and (3) co-generation.
11. BOILER PLANT MAKE-UP WATER TREATMENT:
alkalinity in the make-up water exceeds 50 ppm. The design engineer must
obtain a current analysis of the water supply and determine the type of
treatment which is necessary. The design engineer must determine if the
treated water will cause any substantial corrosion problems and recommend
preventative methods. Life cycle cost studies must be performed to evaluate
which type of water treatment equipment will be applied (ion-exchange
softener, dealkalizer, reverse osmosis, other systems which have proven
successful with local water conditions).
11.2 Water treatment systems are shown on "PL" drawings.
12. BOILER PLANT CHEMICAL FEED SYSTEMS:
12.1 Provide a separate continuous feed system (proportioning pump and tank)
for each boiler, for the deaerator, and for the main steam header.
13. BOILER PLANT LOADS ON EMERGENCY GENERATOR:
13.1 All equipment, controls, instruments, and plant lighting must be served
by an emergency generator.
Manual.
14. CONTROLS AND INSTRUMENTATION:
14.1 Multi-loop industrial process type programmable digital controllers are
required for all control functions except burner management where specialized
digital controllers are required.
14.2 Parallel-positioning combustion controls are required except on smaller
fire tube boilers where single-point positioning controls are practical.
14.3 Controls added to existing systems shall be the same manufacture and
type, if available.
14.4 Monitoring and data management shall be by means of a SCADA program on a
computer work station reserved for only boiler plant monitoring. There shall
also be annunciation of alarms, pressure gages, and other operating displays
on instrument panels within easy view of the firing aisle.
15. ARRANGEMENT OF EQUIPMENT AND PIPING:
control panels, instrumentation panel, motor control center, and control
room/Engineering Control Center along an aisle on the main floor. Boiler and
chiller spaces must be observable from the control room/Engineering Control
Center. Locate boiler feed pumps, water treatment area and main steam header
on the main floor.
15.2 All equipment and piping devices must be accessible from the floor or
from permanent platforms for operation, repair, maintenance and replacement.
Repair, maintenance and replacement must be possible without requiring the
removal of other major items of equipment, the removal of major portions of
piping, or the removal of portions of the building. Generally, there should
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