Best Available Retrof

Technologies

Overview of RetroTechnologies for Power Boiler & #2 Boiler

Domtar Industri

Ashdown M
2001 Pollutants
2002 Pollutants
2003 Pollutants
#1 Power Boiler NOx

“ADEQ agrees to allow Domtar to use the presumptive BART limits as sin the July 6, 2005 Federal Register (FR 39131 – 39136) as BART cont

– Mike Bates, Chief 

Di i i

#1 Power Boiler NOx

0.427

0.21

0.39

0

0.05

0.1

0.15

0.2

0.25

0.3

0.35

0.4

0.45

1

LB/MMBTU

#1 PB Current NCurrent Average EmissionsBART Presump
#2 Power Boiler NOx

# 2 Power Boiler NOx

0.7

0.454

0.39

0

0.10.20.30.40.50.60.70.8

1

LB/MMBTU

#2 PB Current NCurrent Average EmissionsBART Presump
NOx on #2 PB

-200

0

200400600800

1000120014001600

0 0.2 0.4 0.6 0.8 

LB/M M BTU

H o u rs

Histogram for NOx on #2PB
#2 Power Boiler SO2

#2 Power Boiler SO2

1.2

0.828703121

0.15

0

0.20.40.60.8

1

1.21.4

1

LB/MMBTUCurrent SO2 Li

Current Average BART Presump
Histogram for SO2 on #2PB

SO2 for #2 PB

-100

0

100200300400500600700

0 0.5 11.5 2

LB/MMBTU

Hours
PM concerning BART “ ADEQ agrees Domtar may use the M

control as their BART control measure

– Mike Bat

Chief of A
BART Engineering Analysis Guidelines Step 1 – Identify all available retrofit control 

technologies

 Step 2 – Eliminate technically infeasible opt Step 3 – Evaluate control effectiveness of re

control technologies

 Step 4 – Evaluate impacts and document re Step 5 – Evaluate visibility impacts
Step 1 - Available Control Op SNCR SCR Low NOx Burners Over-fire Air / Flue Gas Recycle Com Methane de-NOx  NOxOut (Hybrid of SNCR & SCR) Fuel Switching / Blending
Step 2 - Technically Feasible Control Options SNCR SCR Low NOx Burners Over-fire Air / Flue Gas Recycle Com Methane de-NOx NOxOut (Hybrid of SNCR & SCR) Fuel Switching / Blending
Steps 3, 4 & 5 - Trinity Model

Model 

Run % Controls

Ashdown 

PM 

speciation

ADEQ 

S

pec.

AP-42 

S

pec.

 Days 

over 

BART 

Limit

Delta 

Deciview

ADEQ 

run

#1 & 

#2 34 1.67

1 #

2

#1 3

2 1.6

3

2 90% PM, SO2 on #1, Normal on #2 #2 #1 29 1.51

3 90% PM on #1, Normal on #2 #1 & #2 33 1.63

4 90% PM. SO2 on #1, Normal on #2 #1 & #2 33 1.63

5 90% PM, 50% NOx on #1 50% Nox on #2 #1 & #2 21 1.096 90% PM on #1, Normal on #2 #1 & #2 28 1.497 90% PM, 50% NOX on #1, 50% on #2 #1 & #2 17 0.948

90% PM 50% NOx on 

#1, 70% NOx and 

BART SO2 

Presumptive 

#1 & 

#2 2 0.6

9a 90% PM on #1, Zero Emissions on #2 #1 0 0.41

9b Zero emissions on #1, Normal on #2 #2 20 1.13

10 90% PM 30% NOx on #1, 30% NOx on #2 #1 & #2 21 1.16
Trinity Modeling (SO2 for #1 Power Boiler)

Runs 3 & 4

33 33

05

101520253035

1 2

No Change in SO2 Contribution

Days over BART Limit 

Model 

Run

% 

Control

Ashdown 

PM 

speciation

 Days 

over 

BART 

Limit

Delta 

Deci 

view

3

90% 

PM on 

#1, 

Normal 

on #2

#1 & 

#2 33 1.63

4

90% 

PM & 

SO2 

on #1, 

Normal 

on #2

#1 & 

#2 33 1.63
Trinity Modeling(NOx for #1 Power Boiler)

Runs 6,10,7

28

21

1

05

1015202530

NOx at 0% 30% 50%

Days Over BART Limit 

Model 

Run

% 

Control

ADE

Q 

Spec.

 Days 

over 

BART 

Limit

Delta 

Deci 

view

6

90% 

PM on 

#1, 

Normal 

on #2

#1 & 

#2 28 1.49

7

90% 

PM, 

50% 

NOX 

on #1, 

50% on 

#2

#1 & 

#2 17 0.94

10

90% 

PM 

30% 

NOx on 

#1, 

30% 

NOx on 

#2

#1 & 

#2 21 1.16
Trinity Modeling (NOx for #2 Power Boiler)

NOx on #2 PB run 11 & 12

05

1015202530

90% PM on #1, 30%NOx on #2 90% PM on #1, 50% NOx on #2

Run #

Days over BART limit 
#1 PB Variables For PM, WESP = MACT = BART

Runs 3 & 4

33 33

05

101520253035

90% PM on #1, Normal on #2 90% PM. SO2 on #1, Normal

on #2

No Change in SO2 Contribution

Days over BART Limit

Runs 6,10,

2 8

2 

05

1 01 52 02 53 0

C omposite NO x

at 0%

 30% 

Days Over BART Limit
#2 PB Variables For PM, MACT = BART For SO2, Wet Scrubber = BACT = BA

NOx on #2 PB run 11 & 12

24

21

05

1015202530

90% PM on #1, 30%NOx on

#2

90% PM on #1, 50% NOx on

#2

Run Conditions

Days over BART limit
Trinity Modeling(Highest Control Scenario)

Runs 6,7,8

28

17

05

1015202530

NOx at normal 50% NOx control on each boiler Hea

Days over BART Limit 

Model 

Run % Control

ADE

Q 

Spec.

 Days 

over 

BART 

Limit

Delta 

Deci 

view

6

90% PM 

on #1, 

Normal 

on #2

#1 & 

#2 28 1.49

7

90% PM, 

50% NOX 

on #1, 

50% on 

#2

#1 & 

#2 17 0.94

8

90% PM 

50% NOx 

on #1, 

70% NOx 

and 

BART 

SO2 

Presumptive 

#1 & 

#2 2 0.6
BART Determination Activitie(Presented to ADEQ on Oct 12th

)

 Focus is on NOx for both Power Boile No. 1 PB SO2 emissions are low - no 

are cost effective

 No. 2 PB SO2 controls (i.e., wet scrub

currently BACT 

 For both Power Boilers PM, MACT = 
BART Modeling Protocol  ADEQ Modeling Protocol Availability Validation of Model Assumptions (i.e. 

Speciation)

 Defined Target for Visibility Improvem
Data Quality Concerns Validity of vendor estimated % reduct

various control options

 Asking $50 – 80K per boiler and time to perfo

study of our process

 Emission data – variability of some da

unknown (stack test, AP-42 factor...)

 This then becomes a permitted limit we must 
BART Reduction Credit Fuel Mix Optimization Energy Conservation Efforts
Cost estimates for #1 PB

Direct 

Equipment 

Cost

Indirect 

Cost *

Total 

Installed 

Cost

Operating Cost 

(at max load for 

one hour)** Reduction

Current 

NOx 

Min M

NOx TechnologiesLow Nox Burners $1,900,000 $2,850,000 $4,750,000 Same 30-50% 0.147 0

OFA/FGR Combination $850,000 $1,275,000 $2,125,000 335kWh 40-50% 0.126 0

Flue Gas RecycleNOxOUT SNCR/SCR Hybrid $1,250,000 $1,875,000 $3,125,000 50-70% 0.105 0

$800,000 $1,200,000 $2,000,000 19%NH3 $11.50 $800,000 $1,200,000 $2,000,000 50% Urea $14.25

Methane DeNOx (8-10% heatinput from Natural Gas) $1,050,000 $1,575,000 $2,625,000 $375+335kWh 50-60% 0.105 0

Post 

Technolo

Implementa

(LB/MMBT

.21 

LB/ 

MMBTU

No.1 Power Boiler

SNCR 40-50% 0.126 0
Cost Estimates for #2 PB

Direct 

Equipment 

Cost

Indirect 

Cost *

Total 

Installed 

Cost

Operating Cost 

(at max load for 

one hour)** Reduction

Current 

NOx 

Min M

NOx TechnologiesLow Nox Burners $1,800,000 $2,700,000 $4,500,000 Same 30-50% 0.3178 0

OFA/FGR Combination $975,000 $1,462,500 $2,437,500 420kWh 40-50% 0.2724 0

Flue Gas Recycle N/A N/A N/A N

NOxOUT SNCR/SCR Hybrid $1,250,000 $1,875,000 $3,125,000 50-70% 0.227 0

$900,000 $1,350,000 $2,250,000 19%NH3 $11.50 $900,000 $1,350,000 $2,250,000 50% Urea $14.25

Methane DeNOx (8-10% heatinput from Natural Gas) $1,200,000 $1,800,000 $3,000,000 $524+420kWh 50-60% 0.227 0

SNCR

No.2 Power Boiler

Post 

Technolog

Implementa

(LB/MMBT

.454 

LB/ 

MMBTU

40-50% 0.2724 0
BART Determination Summa No. 1 PB PM = WESP (including 

reductions of Class I aoutside Arkansas)SO2 = N/ANOx = 

 No. 2 PB PM = Wet Scrubber

SO2 = Wet ScrubberNOx =