m. french - welcome to plant miller

7/28/2019 M. French - Welcome to Plant Miller

1/17

Morgan FrenchTechnology & Technology ManagementSouthern Company


2/17

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.


3/17

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


4/17

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.


5/17

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.


6/17


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.


7/17

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


8/17


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


9/17


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


10/17

Plant Miller Today


11/17

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


12/17

Future Environmental Controls/Tests

Mercury Control Calcium Bromide Injection Scrubbers

Coal additives Etc

CO2 ADA Solid Sorbent

Technology


13/17

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


14/17

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


15/17

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


16/17

Project Location

Unit 1 Scrubber

~ 50-60~ 80-90


17/17

Questions??

m. french - welcome to plant miller

Documents