Corporate Headquarters Fabric Filter Engineering Office 6690 West Nine Mile Road – Pensacola, Florida 32526 921 East Wind Dr. Ste. 115 – Westerville, OH 43081

Phone: 850/944-4475 – Facsimile 850/944-8270

E-mail Address: apcsales@sei-group.com – Web: WWW.sei-group.com March 11, 2013

VIA ELECTRONIC MAIL
Didier.Salvador@lhoist.com

Lhoist North America

Attention: Didier Salvador

Reference: Budget Inquiry for SO 2 Removal on Two Lime Kilns

Subject: Southern Environmental, Inc. Budget Proposal No. P13-117

Dear Mr. Salvador,

We are pleased to present the following pr oposal as you requested. The pricing and design details are prelim inary. When the project progresses, we will be happy to revise this to a firm proposal.



### SYSTEM OPERATION:

The flue gas makes a horizontal entrance into the spray dryer vessel through an inlet plenum that evenly distributes the flue gas to the cross section. Quick lime is prepared with a slaking system and mixed into slurry for injection into the spray dryer. Compressed air is used to atomize the water and slurry mixture. After the slurry is injected, the water evaporates and as it does so, the lime reacts with the acid gasses in a wet environment, providi ng efficient scrubbing of the acids. The system is designed so that all the water is totally evaporated, giving a dry discharge of cooled flue gas. A temperatur e control loop modulates the flow of water to maintain the outlet set point temper ature, regardless of fluctuations in the flue gas flow and temperature, while sl urry flow is independently modulated to

maintain the desired SO 2 emissions.

Quicklime is delivered to a storage silo by means of self-unloading bulk trucks. The truck blower conveying air is filter ed by the silo dust collector and vented to atmosphere. Discharge of lime fr om the silo is assisted by a vibrating bin activator (live bottom) mounted to the cone. The lime discharges to the conveyor/feeder

which feeds a detention slaker. Lime slurries are automatically prepared as required with the resultant slu rry discharging into a slurry tank contained within the silo slurry skirt. Lime slurry is conti nuously re-circulated in a recycle loop back to the mixed tank with slurry ta ken off the loop as required. Oversize grit particles 

# SOUTHERN 

# environmental

INC. Air Pollution Control SystemsLhoist North America SEI Proposal P13-117 March 11, 2013

2 are removed by a screen. There are r edundant slurry and fresh water pumps for independently supply.

The polluted flue gas flows into the existi ng fabric filter (baghous e). Virtually all solid particulate is filtered out. The accu mulation of particulate on the bags forms a "filter cake" that helps fill the voids between bag fibers and enhances the filtration efficiency. Also, the unreacted reagent becomes a part of the filter cake and provides a considerable amount of additional gas scrubbing. Contact between the flue gas and reagent is particu larly intimate because of the dense cake and very slow gas movement.

The build-up of particulate on the bags causes a restriction to flow (increase in pressure drop) and periodically the bags are cleaned by a jet of compressed air

that is blown down the insi de of the bags. The bag inflat es rapidly, snaps when it reaches its full diameter, and the particulate on the outside of the bag is thrown off and settles into the hopper where it is removed to disposal. .

Cleaned flue gas is ducted to the ID fan and discharged to atmosphere.



### SCOPE OF SUPPLY:

The following system components are pr ovided for each ACQS system unless

noted otherwise:

1. Two (2) Spray Dryers, each including:

1.1. Horizontal connection inlet plenum 1.2. Inlet plenum, cylinder, and disc harge hopper with inspection/access

door 1.3. Hopper heat on the lowe r one-third of the hopper. 1.4. Slurry nozzles with air and slurry supply lances, flexible hoses, and

shut off valves 1.5. Piping manifolds for single point utility connections 1.6. Hopper discharge airlock

2. Two (2) Reagent Storage and Supply Systems, each including:

2.1. Bolted steel storage silo (skirt supported)

2.2. Fill line 2.3. Vibrating bin bottom discharger 2.4. Aeration pads to aid material dischargeLhoist North America SEI Proposal P13-117 March 11, 2013

3 2.5. Isolation knife gate valve 2.6. Rotary feeder with zero speed switch 2.7. Bin vent filter (dust collector) 2.8. Volumetric feeder (screw type)

2.9. Lime slaker 2.10. Vibrating grit screen 2.11. Grit screw conveyor 2.12. Lime slurry tank 2.13. Lime slurry tank agitator

2.14. Slaker exhaust fan

2.15. Skirt heater 2.16. Silo fill panel 2.17. Local operator station (to inte rface with client supplied controls)

3. Slurry pump skid factory assembl ed, wired, and piped with the following: 3.1.1. Three (3) slurry supply pumps (one for each kiln and one is a common stand-by).

3.1.2. Flow control valves with actuators 3.1.3. Strainers, regulators, valving, and interconnecting piping. 3.1.4. Pipe headers and spray nozzles for lime slurry injection. 3.1.5. Pipe for supply of lime slurry and air to spray dryer.

4. Cooling water pump skid factor y assembled, wired, and piped with the following: 4.1.1. Three (3) water supply pumps (one for each kiln and one is a common stand-by).

4.1.2. Flow control valves with actuators 4.1.3. Regulators, valving, and interconnecting piping. 4.1.4. Pipe headers and spray nozzles for water injection. 4.1.5. Pipe for supply of water and air to spray dryer.

5. Access Provisions to all normally se rviced, elevated areas, as described in the Specifications

6. Field Instrumentation and control description to allow interface with customer supplied control system.Lhoist North America SEI Proposal P13-117 March 11, 2013

4 

### APPLICATION, SIZING, & OPERATING DATA:

(NOTE: All values given are for no rmal operating conditions, unless identified otherwise)

1. PROCESS INFORMATION: The system design is based on the following design parameters.

Kiln 1 Kiln 2 Volume (dscfm) 67,000 82,000 Volume (acfm) 126,792 158.491 Temperature (°F) 500 540 Gas Composition (% vol)

CO 2 20 20

H 2 O 4 2

N 2 66 68

O 2 10 10

SO 2 (lb/hr) 92 436

2. SYSTEM PERFORMANCE: The following is the system design performance. In a firm proposal t here will be conditions and limitations on any performance guarantee.

2.1. SO 2 90% reduction

3. SPRAY DRYER Kiln 1 Kiln 2

3.1. Inlet volume (acfm): 126,792 158.491 3.2. Inlet temperature ( ° F): 500 540 3.3. Outlet volume (acfm): 92,269 112,237 3.4. Outlet temperature ( ° F): 160 160 3.5. Water supply (gpm): 50 67 3.6. Quicklime supply (lb/hr): 150 500 3.7. Atomizing air required (scfm @ 100 psig): 800 1100

3.8. Slurry nozzles: 6 6 3.9. Size (overall): 20’ OD x 95’H 24’ OD x 95’H

3.10. Retention time 11.5 sec 12 sec 3.11. Slaker capacity (lb/hr): 2500 2500Lhoist North America SEI Proposal P13-117 March 11, 2013

5 4. WATER PUMPS (3 each as follows)

4.1. Type: Multi-stage centrifugal 4.2. Capacity: 75 gpm 4.3. Pressure: 150 psig 4.4. Motor size: 15 hp

5. SLURRY PUMPS (3 each as follows – common for both systems)

5.1. Type: Centrifugal 5.2. Capacity: 75 gpm

5.3. Pressure: 300 TDH 5.4. Motor size: 20 hp



### BUDGET PRICING:

Kiln 1 Kiln 2

EQUIPMENT SUPPLY $ 1,863,000 $1,947,000 FREIGHT ESTIMATE: $ 100,000 $100,000



### PURCHASER TO FURNISH: The following items are not included in the above pricing. They may be required on this project.

1. Permits, licenses, and all applicable taxes and duties 2. ID fan system 3. Compressed air system 4. All ash removal equipment

5. Motor starters and motor controls 6. System controls

7. All ductwork 8. Discharge stack and stack testing access provisions 9. Foundations and system erection 10. Area lighting and convenience outlets 11. All emission monitoring equipment and testing 12. Supply of all reagentsLhoist North America SEI Proposal P13-117 March 11, 2013

6 

### FIELD SERVICE:

A field service representative will be provided at the rates in effect at the time the service is performed. A current field service rate sheet is attached.



### SCHEDULE:

The project schedule is subject to review at the time of order. Following is a typical

schedule. An accelerated schedule c an normally be provided if required.

General arrangement (approval) drawings: 4-6 weeks General arrangement (certified) dra wings: 3-4 weeks after approval Equipment shipment: 24-26 weeks after approval. Normally this is a total of 36-42 weeks after receipt of

the order

We appreciate your consideration of an air pollution control system by Southern Environmental Inc. We will be glad to provide any additional information, additional pricing, or support your project in any way that we can. Please do not

hesitate to call on us.

Very truly yours,

SOUTHERN ENVIRONM ENTAL, INC. 

# Charles T. Hayes

Charles T. Hayes Regional Sales Director

Prepared by: Wes McKenzie – Director of Fabric Filter Technology

Cc: Michael Johnson – SEICorporate Headquarters Fabric Filter Engineering Office

6690 West Nine Mile Road • Pensacola, FL 32526 921 Eastwind Drive, Suite 115 • Westerville, OH 43081

P 850.944.4475 • F 850.944.8270 P 614.259.6505 • F 614.259.6510

Email: apcsales@sei-group.com • Web: www.sei-gr oup.com 

## PER DIEM RATES FOR FIELD TECHNICAL SERVICE

Effective 01 January 2012

Southern Environmental, Inc. (SEI) can provide you with one (1) or more of our Field Technical Service Engineers to perform a variety of staff augmentation tasks; for example, unit inspections, equipment eval uations, performance assessments, control system tune ups, conducting staff training cla sses, technical assistance on new unit construction or major rebuilds, and commissioni ng of new units. These services can be provided on a per diem basis per the following rate schedule.

EXPENSES

All living and travel expenses will be charged per calendar day, on a seven (7) day per week basis including expense incurred while tr aveling. Travel expense will be based on travel to and from the job site . Local travel expenses are those incurred while on the job site. All travel and living expenses will be billed at actual cost, plus a ten percent (10%)

administrative fee.

TRAVEL TIME

Travel time will be billed at One-Hundred-Five Dollars ($105.00) per hour for actual

time traveled for initial travel to and return travel from the job site. The maximum travel

time billed for travel in either direction will be eight (8) hours, irrespective of actual time

the travel takes for domestic travel. Actual travel hours will be charged for

international travel.

BILLING RATES

The per diem billing rate for SEI Field Technical Service Engineers is Nine Hundred

Dollars ($900) per eight (8) hour day. Hours in ex cess of eight (8) hours will be billed at one and one-half (1 1/2) times the straight ti me rate. Hours worked on a Saturday or Sunday will be billed at one and one-half (1 1/2) times the straight time rate. Hours worked on nationally recognized holidays will be b illed at two (2) times the straight time

rate. Work hours are limited to no more t han sixteen (16) hours per twenty-four (24) hour period. The writing of the inspection report will be billed at $112.50 per hour. All billing rates are quoted in U.S. Currency.

Southern Environmental, Inc. makes no warranty claim for Field Technical Services performed; WARRANTIES OF MERCHANTABILITY OR FITNESS FOR PURPOSES

ARE SPECIFICALLY DISCLAIMED.