Operating experience of Pyroflow boilers in a 250 MWe unit

Conference · Sun Dec 31 04:00:00 EST 1995

OSTI ID:287971

Chelian, P K; Hyvarinen, K ^[1]

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1. Pyropower Corp., San Diego, CA (United States)

The Cedar Bay Cogeneration project is a 250 MWe unit owned and operated by US Generating Company. This plant has one turbine rated at 250 MWe net which is supplied by three Pyroflow CFB boilers that operate in parallel while supplying a paper mill with steam on an uninterruptible basis. Compared to similar size CFB boilers the Cedar Bay boilers have certain unique features. First, these are reheat boilers which must continue to supply process steam even when the steam turbine is down. Second, the SO{sub 2} control operates at a very low Ca/S molar ratio by optimizing the process conditions and flyash reinjection. Third, the NO{sub x} reduction process utilizes aqueous ammonia injection. This paper presents the operating data at full load in terms of boiler efficiency, and the ability to limit gaseous emissions with minimum limestone and ammonia usage. Unique features relating to the multiple boiler installation are also discussed.

• OSTI ID: 287971
• Report Number(s): CONF-950522--; ISBN 0-7918-1305-3
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
20 FOSSIL-FUELED POWER PLANTS
AIR POLLUTION CONTROL
CARBON MONOXIDE
CIRCULATING SYSTEMS
COAL
DESIGN
DUAL-PURPOSE POWER PLANTS
FLUIDIZED BED BOILERS
FLUIDIZED-BED COMBUSTION
FLY ASH
MATERIALS HANDLING EQUIPMENT
NITROGEN OXIDES
OPACITY
PAPER INDUSTRY
PERFORMANCE
PROCESS HEAT
RECYCLING
SORBENT INJECTION PROCESSES
SULFUR DIOXIDE
THERMAL EFFICIENCY