Transcript Kemper County IGCC Project - Southern Section Air & Waste

Mississippi Power
Kemper County IGCC Plant
2008 Southern Section A&WMA
Annual Meeting and Technical Conference
Scott McMillan
Keith Benvenutti
Southern Company Services
Mississippi Power Company
IGCC
• IGCC stands for “Integrated Gasification
Combined Cycle”
• IGCC is a combined-cycle power plant and a
coal-gasification plant designed specifically to
work with each other.
• There are currently only two coal based IGCC
plants in the U.S.
IGCC
Gasification
• Fuel (i.e. coal, petcoke, biomass, etc.) is introduced
into a “Gasifier”
• The fuel is subjected to high temperature and
pressure with limited air (or oxygen)
• Chemical reaction resulting in the formation of a
synthesis gas or “syngas”
• Gasification is not combustion
• Commercially proven technology
IGCC
Syngas
• Combustible gas typically consisting of mostly CO
and H2
• Heating value generally between 125 and 275
BTU/ft3 (Natural Gas = 1,000 BTU/ft3)
• Capability to remove particulate, nitrogenous
compounds, sulfur, and mercury from syngas prior to
its end use
IGCC
Combined Cycle Power Generation
• Power is generated by combusting fuel (natural
gas, fuel oil, syngas, etc.) in a Combustion Turbine
• Very hot exhaust gas from the turbine discharges
to a Heat Recovery Steam Generator (HRSG)
• Steam raised in the HRSG is expanded through a
Steam Turbine which generates additional power
• Very efficient method of power generation
IGCC
Advantages of IGCC
• Fuel diversity – Potentially wide range of feed stocks
• More efficient than traditional pulverized coal
technology
• Improved NOX, SO2 and Mercury removal than
traditional pulverized coal technology
• Lower CO2 than traditional pulverized coal technology,
with greater potential for future CO2 capture
• Marketable byproducts
Power Systems Development Facility (Wilsonville, AL)
“America’s Advanced Coal
Research Center”
http://psdf.southernco.com
PSDF
• Established in 1996
• Supports DOE’s effort to develop costcompetitive and environmentally
acceptable coal-based power generation
technologies
• Designed at a size that can be reliably
scaled up to commercial applications
• Development of the Transport Gasifier
PSDF
Current Cost Share Partners
• US DOE- National Energy Technology
Laboratory (NETL)
• Southern Company
• Electric Power Research Institute (EPRI)
• KBR
• Peabody Energy
• Lignite Energy Council
Transport Gasifier Attributes / Features
Syngas to Cooling
and Cleanup
Disengager
Riser
Cyclone
• Simple Design:
Mixing
Zone
Coal
Air
• Performs well on low rank & high
ash/high moisture coals
– Operates air-blown for power
generation
Loopseal
J-leg
– No burners, Simple and limited
internal parts
• Low operating temperature
Startup
Burner
Standpipe
Air
Steam
• The Transport Gasifier at the
PSDF has operated for 16,500
hours with >13,200 hours on-coal
and >8,200 hours in gasification
mode
Kemper County IGCC
Location
• Kemper County, MS
• Near Liberty
• Approximately 20 miles
Liberty
Meridian
north of Meridian, MS
Kemper County IGCC
Project Facts
• First-of-a-kind plant based on the transport gasifier
developed at the Power Systems Development
Facility (PSDF)
• Approximately 550 MW integrated gasification
combined cycle (IGCC) power plant
• Owned and operated by Mississippi Power Company
• Startup proposed in 2013
Kemper County IGCC
Project Facts (Continued)
• Fueled by lignite from nearby mine (to be operated
by North American Coal)
• Also capable of using natural gas
• IRS awarded the project $133 million in Investment
Tax Credits (ITC)
• Other DOE funding is possible
Kemper County IGCC
Project Facts (Continued)
• 2 gasifiers (Transport)
• 2 gas cleanup systems (particulate,
nitrogenous compounds, sulfur, mercury)
• 2 combustion turbines (GE 7F) / heat
recovery steam generators
• 1 steam turbine
Kemper County IGCC
SULFUR
AMMONIA
ASH
Lignite / Air
Gasifier
SYNGAS
Gas
Clean Up
EXHAUST GAS
Combustion
Turbine
S
T
A
C
K
Heat Recovery
Steam Generator
STEAM
ELECTRICITY
Lignite / Air
Gasifier
SYNGAS
Gas
Clean Up
Combustion
Turbine
Heat Recovery
Steam Generator
EXHAUST GAS
ASH
Preliminary DRAFT 11/2007
SULFUR
AMMONIA
ELECTRICITY
S
T
A
C
K
Steam
Turbine
Kemper County IGCC
Why Coal?
U. S. Has More Coal Than Any Other Nation
Kemper County IGCC
What Is Lignite?
• Lignite is young coal
• Very high moisture
• Low energy value or “Btu” content
• Only economical to transport short
distances
Kemper County IGCC
Lignite
• Partnering with North
American Coal (NAC)
• NAC is largest lignite
miner in the U.S.
• Operates Red Hills mine
in Ackerman, MS.
Kemper County IGCC
Environmental Permitting/NEPA Activities
• PSD Application was submitted to MDEQ in
December, 2007
• DOE will be preparing an Environmental Impact
Statement (EIS)
• Construction is expected to begin in 2010
• Operation of the facility is expected in 2013
Questions?