PRODUCT UPDATE

www.a-s-h.com

The information contained herein is solely for informational purposes and is not offered, nor should be construed, as a warranty or contractual obligation. Diamond Power International, Inc. reserves the right to make design or material changes without notice.

©2009 Diamond Power International, Inc.

All rights reserved. ASH-9760-0209-00

Allen-Sherman-Hoff · 185 Great Valley Parkway · Malvern, PA 19355 · Phone: (888) ASH-PARTS · Fax: (610) 648-8679

Hydrobin® and Hydro Ejector® are trademarks of Diamond Power International, Inc. MAC® is a trademark of Magaldi Salerno S.p.A. used under license by Diamond Power International, Inc.

Allen-Sherman-Hoff is a Diamond Power International, Inc. division located in Malvern, Pennsylvania. ISO 9001:2000 Certifiied

Diamond Power International, Inc. is a globally acknowledged market leader in all aspects of boiler cleaning and ash handling. For more than 100 years, DPII has consistently provided innovative technologies for power generation, pulp & paper and industrial boiler designs, proven to solve the most difficult plant challenges while delivering promised benefits. Diamond Power is headquartered in Lancaster, Ohio, U.S. with more than 80 field sales, service support, distribution and manufacturing locations worldwide. For more information, visit www.diamondpower.com.

For over a century: Trusted for experience. Preferred for performance.SM

Allen-Sherman-Hoff (A-S-H), a world leader in ash handling technology, regularly works with customers to reduce or eliminate the risks associated with ash ponds. Specializing in both fly ash and bottom ash removal systems, we are in a unique position to analyze and work with each customer’s existing system, propos-ing solutions to cost-effectively address current and anticipated needs.

This product update is designed to provide a brief overview of the technological advancements in fly ash and bottom ash handling technology that offer alternatives to ash storage ponds:

• Fly Ash Conversion (From Wet to Dry System)• Bottom Ash Conversion

- Hydrobin® Dewatering Bin Configuration- Submerged Chain Conveyor (SCC)- MAC™ Dry Bottom Ash Removal

Recent Ash Pond Failures have Gained Attention from Public, Legislators and Environmental Groups

ALTERNATIVES TO ASH STORAGE PONDS

NO ASH PONDS

LEGISLATIVE ACTION

Legislators are currently pushing for the following regulations in our industry:

• WetAshShallBeTreatedas“HazardousWaste”• NewPondsMustMeetStringentRegulatoryStandards• ExistingPondsExaminationRequiredwithin1Year• AllPondstobePeriodicallyInspectedbyGovernmentOfficialsforStructuralStability

• AnnualCostofInsurancetoAddressPondSpillRisk

Major Southern Utility Site:

•5.4 M Cu. Yards of Ash•RoadwayandRailwayCleanupwith

River Dredging•LawsuitsTotaling$165M•CleanupCost$1M/Day•EstimatedTotalCost$250M

Major Northeastern US Site:

•850,000 Cu. Yards of Ash•SpilledIntoRiver•7MonthCleanupEffortCosting$37M

Major Southern Utility Site:

•10,000 Gallons•ToxicMaterialsSpill(Arsenic,Cadmium)•CostsStillBeingCalculated

Traditional Wet System with Dewatering Bin

Submerged Chain Conveyor (SCC)

Dry Bottom Ash Conveyor

Water Use High Medium Zero

Environmental Risk Mitigation Low Medium High

Boiler Derating/Outage Risk Medium High Low

Maintenance High High Low

Operations High High Low

Typical Lead Time 10months 12months 12months

Outage to Install None Major Outage Major Outage

Initial Capital Cost $ $$ $$$

Life Cycle Cost $$$ $$$ PositiveROI

BOTTOM ASH TECHNOLOGY COMPARISON: Benefits and Cost Savings

Hydrobin® Dewatering Bins

Plant Makeup Water

Bottom Ash Hopper

HydroEjector®

Jet PumpClinker Grinder

Ash Hopper Drain Sump

HP Pumps LP Pumps

Seal Water Supply

Surge Tank

Sludge Pumps

Back to Hydrobin® Dewatering Bins

Settling Tank

Sludge Pumps Back to Hydrobin® Dewatering Bins

Slurry Pump

C. Chain & Flight Bars

B. Spray Cleaning Nozzles

A. Drive Unit

I. Overflow Trough

H. Lower Trough

D. Upper Trough

G. Idler Assemblies

F. Access Panels

E. Take-up Assembly

Technologies to Eliminate Ash Storage PondsFLY ASH CONVERSION

M

MM

F

M

MF

MF

M

M

FM

Hydrovactor®

Vacuum Producer

Vent

Water

Ash Disposal Pond

Fly Ash Vacuum Pumps

Ash Storage Silo

Airlock Valve

Collector & Filter

Equalizer Valve

Vent Filter

Pugmill Unloader

Hopper Aeration Blowers

SiloAerationBlowers

Dry DustUnloader

Air GravityConveyors

MaterialHandlingValve

Syle 2Cut-offGate

Precipitataor or Baghouse Hoppers

Precipitataor or Baghouse Hoppers

1-1 1-2 1-3 1-4

1-5 1-6 1-7 1-8

Wet System Overview

• Outdated Technology• ExtensiveWaterUsageandTreatment

Required for Operation• EnvironmentalRisks

o Slurry Piping Leakso Ash Pond Leakso Contamination of Fresh Water

Supplies

Benefits of Dry Conversion

• CompletelyEliminatesWaterUsageandFly Ash Storage Ponds

• MostSitescanRe-UseaLargePortionoftheExistingFlyAshEquipment

• VariousTypesofDryFlyAshSystemsareAvailable to Match Your Application

• PotentialforSALEofFlyAsh

Convert From Wet to Dry Fly Ash Handling Technology

BOTTOM ASH CONVERSION TO HYDROBIN® SYSTEM

BOTTOM ASH HANDLING USING SCC

Submerged Chain Conveyor (SCC) System

STATE-OF-THE-ART DRY BOTTOM ASH HANDLING

Advantages

• ZEROWaterUsage• LowestLifecycleCosts• HighestEnvironmentalRiskMitigation–

Completely Dry!• HighestReliability• LowestMaintenance/OperationCosts• ReducedUnburnedCarbonContentinAsh–ReturnedasHeattoBoiler

• Proven,AdvancedTechnologywithMoreThan120SystemsSoldWorldwide

• PotentialforSaleofBottomAsh(CrushedandMixedwithFlyAsh–OffsetsCapitalExpenditure)

• EliminatesNeedforBottomAshStoragePonds

Disadvantages

• Requires Major Outage for Conversion• HighestInitialCost

Today

MAC® Systems Sold 121

InstalledMW> 42,000

Crusher

MAC®Extractor

Hopper

Advantages

• Lower Water Consumption than Traditional Hydraulic System

• ModerateInitialCost• EliminatesNeedforBottomAshStorage

Ponds

Disadvantages

• Reliability is a Risk• RequiresFrontEndLoaderstoMoveAsh• WaterUsage

o EvaporationandCarryovero Ash Pile Runoff

• MaintenanceCostsRiseOverTimeasSystemAges(RebuildsRequired~3-5Yrs)

• RequiresMajorOutageforInstallation/Conversion

Advantages

• Conversion Does Not Require an Outage• LowestInitialCost• LocationFlexibility• ShortestLeadTime• CanUtilizeMuchofExistingSystem• EliminatesNeedforBottomAshStorage

Ponds

Disadvantages

• Utilizes Same Hydraulic Systemo High Maintenanceo High Power Consumption

• UsesLargeAmountsofWater• HighestLifecycleCosts/Maintenance

Cost• LowestEnvironmentalRiskMitigation

MAC® Dry Bottom Ash System

Traditional Bottom Ash Storage with Slurry Pumping

=ELIMINATESASHPONDS $=POSITIVERETURNS =CONSERVESWATER =LOWMAINTENTANCE

Hydrobin® Dewatering Bins

Plant Makeup Water

Bottom Ash Hopper

HydroEjector®

Jet PumpClinker Grinder

Ash Hopper Drain Sump

HP Pumps LP Pumps

Seal Water Supply

Surge Tank

Sludge Pumps

Back to Hydrobin® Dewatering Bins

Settling Tank

Sludge Pumps Back to Hydrobin® Dewatering Bins

Slurry Pump

C. Chain & Flight Bars

B. Spray Cleaning Nozzles

A. Drive Unit

I. Overflow Trough

H. Lower Trough

D. Upper Trough

G. Idler Assemblies

F. Access Panels

E. Take-up Assembly

Technologies to Eliminate Ash Storage PondsFLY ASH CONVERSION

M

MM

F

M

MF

MF

M

M

FM

Hydrovactor®

Vacuum Producer

Vent

Water

Ash Disposal Pond

Fly Ash Vacuum Pumps

Ash Storage Silo

Airlock Valve

Collector & Filter

Equalizer Valve

Vent Filter

Pugmill Unloader

Hopper Aeration Blowers

SiloAerationBlowers

Dry DustUnloader

Air GravityConveyors

MaterialHandlingValve

Syle 2Cut-offGate

Precipitataor or Baghouse Hoppers

Precipitataor or Baghouse Hoppers

1-1 1-2 1-3 1-4

1-5 1-6 1-7 1-8

Wet System Overview

• Outdated Technology• ExtensiveWaterUsageandTreatment

Required for Operation• EnvironmentalRisks

o Slurry Piping Leakso Ash Pond Leakso Contamination of Fresh Water

Supplies

Benefits of Dry Conversion

• CompletelyEliminatesWaterUsageandFly Ash Storage Ponds

• MostSitescanRe-UseaLargePortionoftheExistingFlyAshEquipment

• VariousTypesofDryFlyAshSystemsareAvailable to Match Your Application

• PotentialforSALEofFlyAsh

Convert From Wet to Dry Fly Ash Handling Technology

BOTTOM ASH CONVERSION TO HYDROBIN® SYSTEM

BOTTOM ASH HANDLING USING SCC

Submerged Chain Conveyor (SCC) System

STATE-OF-THE-ART DRY BOTTOM ASH HANDLING

Advantages

• ZEROWaterUsage• LowestLifecycleCosts• HighestEnvironmentalRiskMitigation–

Completely Dry!• HighestReliability• LowestMaintenance/OperationCosts• ReducedUnburnedCarbonContentinAsh–ReturnedasHeattoBoiler

• Proven,AdvancedTechnologywithMoreThan120SystemsSoldWorldwide

• PotentialforSaleofBottomAsh(CrushedandMixedwithFlyAsh–OffsetsCapitalExpenditure)

• EliminatesNeedforBottomAshStoragePonds

Disadvantages

• Requires Major Outage for Conversion• HighestInitialCost

Today

MAC® Systems Sold 121

InstalledMW> 42,000

Crusher

MAC®Extractor

Hopper

Advantages

• Lower Water Consumption than Traditional Hydraulic System

• ModerateInitialCost• EliminatesNeedforBottomAshStorage

Ponds

Disadvantages

• Reliability is a Risk• RequiresFrontEndLoaderstoMoveAsh• WaterUsage

o EvaporationandCarryovero Ash Pile Runoff

• MaintenanceCostsRiseOverTimeasSystemAges(RebuildsRequired~3-5Yrs)

• RequiresMajorOutageforInstallation/Conversion

Advantages

• Conversion Does Not Require an Outage• LowestInitialCost• LocationFlexibility• ShortestLeadTime• CanUtilizeMuchofExistingSystem• EliminatesNeedforBottomAshStorage

Ponds

Disadvantages

• Utilizes Same Hydraulic Systemo High Maintenanceo High Power Consumption

• UsesLargeAmountsofWater• HighestLifecycleCosts/Maintenance

Cost• LowestEnvironmentalRiskMitigation

MAC® Dry Bottom Ash System

Traditional Bottom Ash Storage with Slurry Pumping

=ELIMINATESASHPONDS $=POSITIVERETURNS =CONSERVESWATER =LOWMAINTENTANCE

PRODUCT UPDATE

www.a-s-h.com

The information contained herein is solely for informational purposes and is not offered, nor should be construed, as a warranty or contractual obligation. Diamond Power International, Inc. reserves the right to make design or material changes without notice.

©2009 Diamond Power International, Inc.

All rights reserved. ASH-9760-0209-00

Allen-Sherman-Hoff · 185 Great Valley Parkway · Malvern, PA 19355 · Phone: (888) ASH-PARTS · Fax: (610) 648-8679

Hydrobin® and Hydro Ejector® are trademarks of Diamond Power International, Inc. MAC® is a trademark of Magaldi Salerno S.p.A. used under license by Diamond Power International, Inc.

Allen-Sherman-Hoff is a Diamond Power International, Inc. division located in Malvern, Pennsylvania. ISO 9001:2000 Certifiied

Diamond Power International, Inc. is a globally acknowledged market leader in all aspects of boiler cleaning and ash handling. For more than 100 years, DPII has consistently provided innovative technologies for power generation, pulp & paper and industrial boiler designs, proven to solve the most difficult plant challenges while delivering promised benefits. Diamond Power is headquartered in Lancaster, Ohio, U.S. with more than 80 field sales, service support, distribution and manufacturing locations worldwide. For more information, visit www.diamondpower.com.

For over a century: Trusted for experience. Preferred for performance.SM

Allen-Sherman-Hoff (A-S-H), a world leader in ash handling technology, regularly works with customers to reduce or eliminate the risks associated with ash ponds. Specializing in both fly ash and bottom ash removal systems, we are in a unique position to analyze and work with each customer’s existing system, propos-ing solutions to cost-effectively address current and anticipated needs.

This product update is designed to provide a brief overview of the technological advancements in fly ash and bottom ash handling technology that offer alternatives to ash storage ponds:

• Fly Ash Conversion (From Wet to Dry System)• Bottom Ash Conversion

- Hydrobin® Dewatering Bin Configuration- Submerged Chain Conveyor (SCC)- MAC™ Dry Bottom Ash Removal

Recent Ash Pond Failures have Gained Attention from Public, Legislators and Environmental Groups

ALTERNATIVES TO ASH STORAGE PONDS

NO ASH PONDS

LEGISLATIVE ACTION

Legislators are currently pushing for the following regulations in our industry:

• WetAshShallBeTreatedas“HazardousWaste”• NewPondsMustMeetStringentRegulatoryStandards• ExistingPondsExaminationRequiredwithin1Year• AllPondstobePeriodicallyInspectedbyGovernmentOfficialsforStructuralStability

• AnnualCostofInsurancetoAddressPondSpillRisk

Major Southern Utility Site:

•5.4 M Cu. Yards of Ash•RoadwayandRailwayCleanupwith

River Dredging•LawsuitsTotaling$165M•CleanupCost$1M/Day•EstimatedTotalCost$250M

Major Northeastern US Site:

•850,000 Cu. Yards of Ash•SpilledIntoRiver•7MonthCleanupEffortCosting$37M

Major Southern Utility Site:

•10,000 Gallons•ToxicMaterialsSpill(Arsenic,Cadmium)•CostsStillBeingCalculated

Traditional Wet System with Dewatering Bin

Submerged Chain Conveyor (SCC)

Dry Bottom Ash Conveyor

Water Use High Medium Zero

Environmental Risk Mitigation Low Medium High

Boiler Derating/Outage Risk Medium High Low

Maintenance High High Low

Operations High High Low

Typical Lead Time 10months 12months 12months

Outage to Install None Major Outage Major Outage

Initial Capital Cost $ $$ $$$

Life Cycle Cost $$$ $$$ PositiveROI

BOTTOM ASH TECHNOLOGY COMPARISON: Benefits and Cost Savings