DEALING WITH THE NEW BOILER EMISSION REGULATIONS · 2019. 2. 6. · Ammonia Injection Grid (AIG)...
Transcript of DEALING WITH THE NEW BOILER EMISSION REGULATIONS · 2019. 2. 6. · Ammonia Injection Grid (AIG)...
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DEALING WITH THE NEW BOILER EMISSION REGULATIONS
DOUG VICKERY & BRIAN DOLANJANUARY 15, 2014
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Goals for Today
Review SJVUAPCD rule 4320 Compliance Options for NEW equipmentCompliance Options for EXISTING equipment Introduction to ‐Selective Catalytic Reduction
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San Joaquin Valley APCD Rule 4320Units 5 MM Btu/hr to 20 MMBtu/hr
Standard Schedule – 9 ppm or 0.011 lb/MMBtu
ATC filed by July 1, 2011Compliance by July 1, 2012
Enhanced Schedule – 6 ppm or 0.007 lb/MMBtuATC filed by January 1, 2013Compliance by January 1, 2014
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San Joaquin Valley APCD Rule 4320Units 20 MMBtu/hr & Above
Standard Schedule – 7 ppm or 0.008 lb/MMBtu
ATC filed by July 1, 2009Compliance by July 1, 2010
Enhanced Schedule – 5 ppm or 0.0062 lb/MMBtuATC filed by January 1, 2013Compliance by January 1, 2014
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THE TARGET IS 5PPM NOx
What are your options?File for Low Use Pay Annual FeeNew Equipment Retrofit Equipment
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San Joaquin Valley APCD Rule 4320
File for Low Use
ATC filed by January 1, 2013Compliance by January 1, 2014
1.8 Billion Btu per year (72 hours @ 25 MMBtu/hr) Demonstrate 3% O2 or tune twice per year
New requirements will apply to current “Low Use” permits
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San Joaquin Valley APCD Rule 4320
Pay Annual Fee
Based on total emissions generated
$9,350 per Ton of NOx (District Rule 9510)
4% administration fee
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COMPLIANCE FOR NEW BOILERS
NEW GENERATION OF TECHNOLOGY
Ultra Low NOx Burner/Boiler (700HP or <28MMBtu/hr)
SCR (>28 MMBtu/hr)
Best Performance Standards (BPS)Stand by –SJVUAPCD has currently suspended its policyGOOD NEWS! Incentive funding is available
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Firetube Example
• 700 hp Firetube • 24.15 MM Btu/hr Input• 5ppm NOx (New Technology in Boilers)• Fully Condensing Economizer 247 deg F EGT • FD Fan VFD & O2 Trim• Auto‐Blowdown Control & Heat Recovery• Passed source test
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Firetube
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Firetube
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COMPLIANCE FOR EXISTING EQUIPMENT
• INTRODUCTION TO (SCR)In the Selective Catalytic Reduction process, a
catalyst facilitates a chemical reaction between NOx and Ammonia (NH3) in the
presence of Oxygen (O2) to produce Nitrogen gas (N2) and water vapor (H2O)
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San Joaquin Valley APCD Rule 4320
Retrofit Equipment to 5 ppm NOx with SCR
BENEFITS ‐Convert to High Efficiency 30 ppm burnerReduced FGRReduce excess air Increased Capacity/OutputSimplification of control strategy
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De‐NOx Principle
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Chemical Reaction
• 4NO + 4NH3 + O2 = 4N2 + 6H2O (>90%)
• 2NO2 + 4NH3 + O2 = 3N2 + 6H2O
• NO + NO2 + 2NH3 = 2N2 + 3H2O
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SCR System
Ammonia Flow Control Unit (AFCU)
Ammonia Injection Grid (AIG)
Reactor Housing
Catalyst
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SCR System
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SCR System
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Catalyst
DNX Type� Corrugated style� Buy in modules� Engineered catalyst sizing� Boiler Exhaust Temp� Inlet Nox/Outlet NOx
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Ammonia Systems
• Anhydrous Ammonia
• Aqueous Ammonia
• Urea to Ammonia
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Anhydrous Ammonia
• Least expensive installation• Three 150# cylinders• Classified as ‘toxic’ – careful storage and handling
• Dilution air blower transports NH3 to AIG• Flow metering is Critical
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Aqueous Ammonia
• Ammonia stored in water (19%)• 2,000 gallon tank w/foundation containment• Vaporizer Required (Electric is most common) • Classified as ‘toxic’ – careful storage and handling
• Dilution air blower transports NH3 to AIG
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Urea
• Most expensive• Large tank system required• AFCU to convert Urea to ammonia • Temperature dependent to keep in solution• Classified as ‘non‐hazardous’ • Dilution air blower transports NH3 to AIG• Industry is trending more toward urea
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Frequently Asked Questions
• Cost of SCR vs. New Boiler/Burner
• Complexity of SCR vs. New Boiler/Burner
• Space Requirements
• Operational cost impacts
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Questions?