Proposed EPA Regulations Changing the Coal Power Generation Industry
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1 CCR -- ELG Proposed EPA Regulations Changing the Coal Power Generation Industry How Dense Slurry Ash and Wastewater Management can Solve the Challenges of Proposed Regulations 1
2 CCR: Coal Combustion Residuals 40 CFR 257 Subpart D Proposed EPA Rules for Regulating : Fly Ash, Bottom Ash and Gypsum in Surface Impoundments Including Impoundment Design/Operations, Fugitive Dust, Ground Water Protection ELG: Effluent Limitations Guidelines 40 CFR Part 423 Proposed EPA Rules for Regulating: FGD Wastewater, Fly Ash Transport Water, Flue Gas Mercury Control (FGMC) Water Bottom Ash Transport Water, Gasification Wastewater, Coal Pile Runoff Leachate, Metal Cleaning Wastewater 2
3 Impact of CCR and ELG Rules CCR Unlined Wet Surface Impoundments for Ash no Longer be Allowed Strict Controls on Fugitive Dust from Ash Impoundments Strict Requirements for Impoundment Location, Design and Inspection Strict Closure and Post-Closure Requirements Storm Water Run-On and Run-Off Controls Strict Rules for Ground Water Monitoring and Corrective Action ELG Discharge of FA Transport & FGMC no Longer Allowed Strict Numerical Standards for Other Wastewater Discharge Proposed Rules Primarily Target Coal-Fired Power Plants Ash Management Options for an Operating Coal-Fired Power Plant?? 3
4 Pending Rule Changes Driving Transition Away from Traditional Wet Slurry Plants Closing Impoundments or Converting Away from Traditional Wet Slurry Systems Traditional Wet & Dry Systems Have Disadvantages Need For Better Ash Management & Storage Circumix Dense Slurry Technology Offers Advantages over Wet and Dry Systems Lean Slurry Ash Impoundment 4
5 ELG & CCR Comments were due on September 20, 2013 Among Other Things, EPA Addressed the Following: Use and reference of foreign technology Use of Best Available Technology Economically Achievable (BAT) Use of Best Available Demonstrated Control Technology (BADCT) Anti-Circumvention provisions Zero discharge of leachate Best Management Practices (BMP) for Surface Impoundments Voluntary Incentive Program Comments were Submitted by GEA EGI & NAES on these Topics 5
6 What is Circumix Dense Slurry Technology? Intense Mixing that Maximizes Availability of Reactive Ions Mixes Wastewater with Fly Ash, & Other Combustion Residuals Additives Not Required Water to Solids Ratio ~1:1 Slurry Pumpable 10 km + Slurry Sets in Hours Product Exhibits: Low Hydraulic Conductivity High Compressional Strength Zero Discharge of Transport Water Enhanced Metals Sequestration Dense Slurry Discharge 6
7 Who Developed and Who Offers the Technology? GEA EGI Co.Ltd. Largest Third-Party O&M Company O&M Track Record of 231 Facilities and 67 GW 2,700 Employees, $400+ Million in Revenues Currently Operating 35 GW of Power Facilities (114 plants) GEA EGI Developed Dense Slurry Provides Heller Type Dry Cooling & BoP Systems for the Power Industry GEA Group: $7.4 Billion Revenues GEA EGI $130 Million Revenues GEA EGI is a Member of HX segment Within the GEA Group NAES and GEA have Teamed to Deploy Circumix Dense Slurry Technology and for NAES to be the Exclusive Provider of this Technology in North America 7
8 Past, Current and Future Dense Slurry Technology Use Plant Country Year MW BA -PH FA -PH Slurry m 3 Pannon Hőerőmű Hungary ,480,000 Tatabányai Erőmű Hungary ,000 AES Borsodi Hungary ,400,000 Matra Hungary * ,040,000 SC Collterm SA Romania ,050,000 Jacksonville JEA USA * 63 6,720,000 SC Collterm SA Romania ,000 Rovinari Romania * 508 1,140,000 Craiova II. Romania * ,000 Isalnita Romania * ,600 Spectrum India Const Turceni Romania Commis * * Highlighted Figures Indicate Ash Stabilized with FGD Water 8
9 Dense Slurry System Installations Rovinari In Operation Since 2009 Scale: 4 X 270 m 3 / Hour (E. Europe) Jacksonville Unit, X 62.5 Ton/Hour Units 9
10 Disadvantages of Wet (lean) Slurry and Dry Ash Management Traditional Lean Slurry Cons High Water Use Waste Water Management Risk of Flow if Released Dike Inspection & Maintenance Risk of Ground Water Contamination Will Become Airborne if Dry Process Water Leachate Variable Hydraulic Conductivity Complex Closure Requirements Traditional Dry Management Cons Relatively High Capital/Operating Cost High Risk of Fugitive Dust Multiple Handling for Transport Increased Safety Risk from Trucks Impoundment Heavy Equipment Required Relatively High Hydraulic Conductivity High Storm Water Leachate Volumes Ground Water Risks High Labor Costs (dust supp. fuel mgt., security, lighting, etc.) 10
11 Dense Slurry Advantages Pursuant to CCR Proposed Rule Features & Advantages Superior Environmental Properties Solid, Non-Dusting Product Significantly Reduced Fugitive Emissions Cured Strength Typically psi Eliminates Risk of Liquefaction & Spills Simplifies Impoundment Design Reduced Inspection Requirements Increased Ash Storage in Existing Space Low Hydraulic Conductivity ( ) Enhanced Metals Sequestration Reduced Leachate Generation Reduced Risk of Groundwater Contamination Lower Post-Closure Risks 11
12 Advantages Pursuant to ELG Proposed Rule Effective Combined Stabilization of Ash & Wastewater 80%-90% Reduction of Water Use for Ash Management Zero Discharge of Transport Water Leachate can be Reprocessed = Zero Discharge Impoundment Active Dense Slurry Impoundment Reduction of Plant-Wide Wastewater Generation Enhanced Protection of Ground Water from Low Hydraulic Conductivity Low Hydraulic Conductivity = Low Leachate Volumes Proven Technology, Low Complexity, Low Life-Cycle Cost, Ability to Utilize Existing Infrastructure,Energy Efficient, Can Achieve Effluent Standards 12
13 Dense Slurry System Final Ash Disposal Solidified Product Elevated Landfill New Dike Borrow Material No Incidents of Slope Failure, Seepage or Liquefaction 13
14 Stabilized Ash Performance Example of Slurry Composition, Total Metals and Leach Performance Slurry Make-Up Total Metals and Leach Performance (mg/l) Components Wt % Metal Total SPLP TCLP Fly Ash 35.1 As Coarse FA 10.5 Ba Economizer Ash 2.5 Ca Bottom Ash 4.3 Cd Water 37.1 Cr < FGD Water 2.1 Cu < Lime Pre-Treat (ion exchange) Water 8.4 Hg <0.001 <0.001 Mn 336 < Slurry Density 1.33 g/cm 3 Pb 6.06 <0.005 <0.005 V 48.8 <0.008 <
15 Examples of Physical Properties of Cured Dense Slurry Product Sample Water Cure Time Days Water-Ash Ratio Hydraulic Cond. cm/sec Wet Density Comp. Strength lb/ft 3 1 Indust. Water :1 6.8E , % FGD 90 1:1 1.0E ,014 3 Indust. Water :1 2.1E , % FGD :1 1.0E , % FGD :1 1.0E , % FGD :1 1.3E , % FGD :1 4.2E , % FGD :1 6.0E % FGD :1 4.8E Indust. Water :1 1.2E , Indust. Water :1 1.1E % FGD :1 3.5E , % FGD :1 1.9E , % FGD :1 1.2E % FGD :1 1.1E
16 Crystal Growth During Curing Improves Hydraulic Conductivity Ca Hydroxide Al -Si Sphere w/ Ca-Rich Phase Ettringite Needles Interstitial Crystal Growth Reduces Pore Size, Inhibits Fluid Flow, Increases Capillary Forces, Increases Tortuosity and Minimizes Hydraulic Conductivity 16
17 Treatability Testing Performed Particle Size Distribution Porosity - Hydraulic Conductivity Chemical Composition Rheology Flow Dynamics Compressional Strength Leach Resistance Water Stochiometry Dense Slurry System Ash Testing Minimal Free Water 72-hr Load Test 17
18 Ash/Wastewater Testing Programs can be Performed On Site Ash & Wastewater can be Shipped and Tested Remotely Testing is Performed on Several Recipes to Establish Optimum Mix Test Scale of 1.5 tons/hr Facilitates Accurate Scale-Up Cost Analysis Dense Slurry System Ash Testing Testing Facility is Skid-Mounted and Contained in One 20-ft. Shipping Container Test System is Autonomous of Plant Support and Stand-Alone Modular Test Unit 18
19 Summary Circumix Dense Slurry Technology Effectively Addresses all of the Challenges Presented by the Proposed CCR and ELG Rules for a Cost that is Less than Traditional Dry Ash Management 19
20 Thank You for Your Time For More Information, Please Contact NAES 20
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