POWER August 2011 - 28

PLANT OF THE YEAR
pilot programs to meet this goal.) Mobilization
of the construction site began shortly after
this agreement was signed.
The Sierra Club described the result of the
negotiation " a groundbreaking agreement
that can serve as a model for environmental
groups and utilities working together. "
You may recall City Water, Light & Power,
the municipal utilities agency of the City of
Springfield, Ill., negotiated a similar agreement
to allow its Dallman 4 project to move
forward. Dallman 4 was POWER's 2009
Plant of the Year (see the August 2009 issue
in our online archives at www.powermag
.com).
The price tag for all the projects included
in the CEP was about $3 billion and covered
a variety of strategic investments:
■ In 2007, $81 million was invested in an
SCR system that reduced NOx
the utility's La Cygne plant.
by 87% at
■ About $265 million was invested in wind
and energy efficiency/demand reduction
projects.
■ The balance went toward the $2.4 billion
price tag of the construction costs for Iatan
1 environmental retrofits, the construction
of Iatan 2, and Iatan common facilities.
Output from the 850-MW Iatan 2 is owned
by a consortium of utilities and power distributors.
KCP&L and its affiliate KCP&L
GMO own roughly 73% of the new plant;
Empire District Electric owns 12%; Missouri
Joint Municipal Electric Utility Commission
owns 11.76% (equivalent to 100 MW); and
Kansas Electric Power Cooperative owns
3.5%. KCP&L and GMO own 88% of Iatan
1. KCP&L is the plant operator and responsible
for routine maintenance.
Work the Plan
Approval of the CEP by both the Missouri
Public Service and Kansas Corporation
Commissions cleared the regulatory road for
construction of Iatan 2, although KCP&L
had begun construction of the environmental
upgrades for Iatan 1 the previous August.
Construction started on Iatan 2 in SepTable
2. Major contractors and equipment suppliers to the Iatan 2 project.
Source: KCP&L
What
Plant engineering and design
Plant construction
Steam generator and erection services
Balance-of-plant construction and steam
turbine erection
Steam turbine generators
Selective catalytic reduction systems
Cooling tower
Fabric filter
Material handling
Wet flue gas desulfurization
Distributed control system
Who
Burns & McDonnell, owner's engineer and designed the balance of plant
Multiprime/Hybrid EPC
Alstom Power
Kiewit Power
Toshiba
Alstom Power
SPX
Alstom Power
Automatic Systems Inc.
Alstom Power
Emerson
Sootblowers and furnace wall cleaning Diamond Power
Condensers
Feedwater heaters
Circulating water pumps
Condensate pumps
Boiler feedwater pumps
Flowserve
Flowserve
Flowserve
Boiler feedwater pumps, Unit 2 pump turbines Flowserve
Fuel handling
Auxiliary transformers
Large power transformers
Dry ash handling
Limestone preparation
Auxiliary boiler
Water systems
28
Automatic Systems Inc.
Hyundai
Hyundai
United Conveyor Corp.
Automatic Systems Inc.
Vapor Power
Ecotech/Aquatech/WesTech
www.powermag.com
POWER | August 2011
Thermal Engineering International
Thermal Engineering International
tember 2007. Earlier that year, KCP&L had
awarded a fixed-price contract to Alstom Power
to engineer, design, and construct the boiler
island, including the air quality control system
(AQCS) for both units. The steam turbine was
purchased from Toshiba. Burns & McDonnell
was retained to provide engineering design
services for both projects (Table 2).
The supercritical Iatan 2 boiler, Alstom's
largest sliding pressure boiler in the U.S.,
was designed to burn low-sulfur Powder
River Basin coal with low-NOx
tangential
burners. " Iatan 2 will be approximately 10%
to 12% more efficient than a typical plant
built in the 1970s, " says Burns & McDonnell
project manager Bob Reymond. " The stateof-the-art
emissions control systems will remove
about 98% of sulfur dioxide from the
exhaust. " The post-combustion AQCS begins
with an SCR, fabric filter, and wet flue gas
desulfurization (wet FGD). Activated carbon
injection (ACI) was also added to the AQCS
suite of equipment for mercury emissions
reductions. The permitted levels of mercury
emissions are based on site emissions, thereby
giving operators some discretion in how
much activated carbon is injected into each
unit (Figure 2).
For simplicity of common operating practices
and cost-effective purchasing, the entire
post-combustion AQCS for Iatan 1 is virtually
identical to that of the new Iatan 2. Today,
the NOx
lower, and SO2
emissions of both units are 53%
emissions are 74% lower,
than those of only Iatan 1 prior to the AQCS
upgrades. Using high-efficiency supercritical
combustion technology also contributed
greatly to the utility's CO2
reduction goals,
as higher combustion efficiency means less
CO2
2. Duplicated design. The design of the
air quality control systems for the two units
was very similar. On Iatan 1, the selective
catalytic reduction (SCR) system was placed
away from the unit because of retrofit space
constraints; for Iatan 2, the SCR system was
part of the integral design. Otherwise, the
same catalyst type and size was used, and
both boxes are able to hold four layers, although
only two layers are currently used on
each unit. Courtesy: KCP&L
is produced per ton of coal consumed.
KCP&L continues to make focused invest
http://www.powermag http://www.powermag.com
POWER August 2011

Table of Contents for the Digital Edition of POWER August 2011
