M. French - Welcome to Plant Miller
Transcript of M. French - Welcome to Plant Miller
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Morgan FrenchTechnology & Technology ManagementSouthern Company
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History of Miller
Plant Miller is named for James H. Miller Jr., who was asenior vice president and member of the board ofdirectors of Alabama Power Company. He was with
Alabama Power Company for almost 30 years. Plant Miller first provided electricity in 1978 when the first
of four generating units had been completed. Unit 1began commercial operation on 10/12/1978; Unit 2 on
05/01/1985; Unit 3 on 5/01/1989; and Unit 4 on 3/05/1991.Each of its four units can generate 720 million watts ofelectricity. That is enough electricity to serve the needsof about 825,000 homes.
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Plant Miller Facts
Plant Miller is the largest coal-fuel power plant in the state.At the present, Plant Miller isalso the largest operating
electric generating plant in thestate, surpassing all coal andoperating nuclear plants
Plant Miller burns around9,600 tons of Powder RiverBasin (PRB) coal/day on eachunit or around 12,000,000 tonsper year
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Plant Miller Facts Cont.
Plant Miller cost $1.9billion dollars toconstruct. During
construction 11.6 millioncubic yards of dirt androck were removed fromthe construction site, and485,000 cubic yards ofconcrete were used.
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Miller Environmental Upgrades
SCRs- Selective CatalyticReduction
The Problem
Whenever coal is burnedin air, the components ofair oxygen and nitrogencontent in the coal cancombine to form nitrogenoxides, or NOx.
NOx is a green house gasand is regulated under theClean Air Act.
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Miller Environmental Upgrades
SCRs Cont. The Solution
SCRs reduce NOX, by80-90%
Units 3 and 4 placed inservice in 2003
Units 1 and 2 placed inservice in 2005
Cost of $400,000,000 The SCRs operate at around 700F.
Ammonia is injected into the gasbefore it enters the SCR. Thecatalyst aids the NOx and theammonia mixing to produceharmless nitrogen gas and water.
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Miller Environmental Upgrades FGDs- Flue Gas
Desulfurization Scrubbers
The Problem The coal burned to produce electricity
contains sulfur, an element that when
burned in air produces sulfur dioxide(SO2). The amount of SO2 emitted isdirectly related to the amount of sulfur inthe coal
PRB coal contains approximately 0.4%sulfur while Eastern coal contains
approximately 1% sulfur. SO2 can cause acid rain and is regulated
under the Clean Air Act
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Miller Environmental Upgrades
FGDs Cont. The Solution
Scrubbers reduce SO2emissions by 95-99%
Reduces mercury and fineparticulate emissions
In service dates: Unit 3 (December
2009)
Unit 4 (February 2010) Unit 2 (April 2010) Unit 1 (April 2011)
Total Miller costapproximately $900million
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Miller Environmental Upgrades
The Process: CaCO3 + SO2 + 2 H2O +
1/2 O2CaSO4 Limestone + SO2 + Water
+ OxygenGypsum
On Average, for every tonof SO2 removed:
* 1.7 tons of limestonemust be used
* 3.5 tons of gypsumproduced
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Plant Miller Today
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Miller Environmental Controls
Scrubber
SO2Control New
Stack
Gypsum
Coal Fired Boiler
AirHeater
BottomAsh
CoalMill
Flyash
Low NOXBurners
Fan
OldStackSCR
NOXControl ESP
Since 2000 Plant Miller hasspent over $1billion on newEnvironmental controls
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Future Environmental Controls/Tests
Mercury Control Calcium Bromide Injection Scrubbers
Coal additives Etc
CO2 ADA Solid Sorbent
Technology
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Project Goals
The overall objective of thisfunding stage is to validate solidsorbent-based post combustionCO2 capture through slipstreampilot testing.
Project Goals: Achieve 90% CO2 Capture Make progress in limiting the
increase of Levelized Cost of
Electricity LCOE to 35% for acommercial unit
Generate a high purity CO2stream
Successfully scale sorbents
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CO2 Removal Technology
Process Flue gas passes through
Adsorber module where sorbentparticle adsorbs CO2
Regenerable solid sorbentcycles between Adsorber andRegenerator. Raising thetemperature of the of thesorbent releases CO2
Flue GasPreparation
CO2Adsorber
Baghouse
Regenerator
Baghous
e
Flue Gas
CO2
Solid Sorbent
HeatExchanger
Process Blower
1 MW Pilot
Flue
gas
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Potential Benefits of Solid Sorbents Energy Penalty
Sensible heat requirement is less although heat recovery should beconsidered
Latent heat of evaporation Corrosion
Less expensive materials of construction No corrosion inhibitors required
Air Reduced emissions of amines
Water Less cooling water required Minimal liquid waste
Process Flexibility and Operability Can be applied to cycling plant load
following
No risk of foaming or other solvent-related challenges
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Project Location
Unit 1 Scrubber
~ 50-60~ 80-90
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Questions??