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2013 Emissions Inventory Workshop: Essential Calculations and Control Methods

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This workshop outlines the fundamental calculations and methodologies used for emissions inventory, emphasizing the general equation E = A * EF, where E is emissions, A is the activity, and EF is the emission factor. Participants will explore practical examples, including calculations for industrial boilers, emergency generators, and surface coating processes, as well as control equipment efficiency. The session aims to enhance understanding and application of these calculations to achieve regulatory compliance and improve emissions management.

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2013 Emissions Inventory Workshop: Essential Calculations and Control Methods

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  1. EXAMPLE CALCULATIONS 2013 Emissions Inventory Workshop

  2. General Equation • For most emission sources the following equation is used: • E = A * EF • Where • E = Calculated emissions • A = Activity or annual process rate • EF = Emission factor - determined by the method of calculation • Examples sources: • AP-42 • WebFire • Permit 2013 Emissions Inventory Workshop

  3. Industrial Boiler – CO & Benzene Calculation Process: 10-100 mmbtu/hr boiler SCC: 10200602 Fuel: Natural Gas Capacity: 84 mmbtu/hr Control: Uncontrolled 2013 Emissions Inventory Workshop

  4. US EPA CHIEF Website: http://www.epa.gov/ttn/chief/index.html 2013 Emissions Inventory Workshop

  5. 2013 Emissions Inventory Workshop

  6. 2013 Emissions Inventory Workshop

  7. 2013 Emissions Inventory Workshop

  8. 2013 Emissions Inventory Workshop

  9. Industrial Boiler – CO Calculation 2013 Emissions Inventory Workshop

  10. EF A E • E = A * EF = ??? tons Convert to tons: 2013 Emissions Inventory Workshop

  11. Industrial Boiler – CO Calculation 2013 Emissions Inventory Workshop

  12. US EPA CHIEF Website: http://www.epa.gov/ttn/chief/index.html 2013 Emissions Inventory Workshop

  13. 2013 Emissions Inventory Workshop

  14. 2013 Emissions Inventory Workshop

  15. 2013 Emissions Inventory Workshop

  16. 2013 Emissions Inventory Workshop

  17. EF A E • E = A * EF = ??? tons Convert to tons: 2013 Emissions Inventory Workshop

  18. Industrial Boiler – CO Calculation 2013 Emissions Inventory Workshop

  19. Emergency Generator – NOx Calculation Process: Reciprocating emergency generator SCC: 20200102 Fuel: Diesel Capacity: 400 hp Pollutant: NOx Factor: 604 lbs/1000 gal Control: Uncontrolled Operation: 50 hours Activity: 500 gal Heat Content: 137 mmbtu/1000 gal 2013 Emissions Inventory Workshop

  20. EF A • E = A * EF = ??? tons E Convert to tons: 2013 Emissions Inventory Workshop

  21. Surface Coating – Xylene & VOC Calculation Process: Surface coating – spray painting SCC: 40200101 Pollutant: Xylene, VOC (non-HAP) Paint: Acrylic Red 2013 Emissions Inventory Workshop

  22. 2013 Emissions Inventory Workshop

  23. E = A * VOC Content * (Xylene:VOC Ratio) = ??? tons Now, for non-HAP VOC: VOC (non-HAP) = Total VOC ̶ Xylene VOC (non-HAP) = 2013 Emissions Inventory Workshop

  24. Control Equipment Calculations 2013 Emissions Inventory Workshop

  25. Control Efficiency Calculations • Capture Efficiency: • The percentage of air emission that is collected and routed to the control equipment. Most control devices have a 100% capture efficiency. • Control Efficiency: • The percentage of air pollutant that is removed from the air stream by the control device. 2013 Emissions Inventory Workshop

  26. Stone Quarry – Primary Crushing Calculation Process: Primary Crushing SCC: 30532001 Pollutant: PM10 Control: Water Spraying 2013 Emissions Inventory Workshop

  27. Stone Quarry – Primary Crushing Calculation 2013 Emissions Inventory Workshop

  28. EF A E • E = A * EF * (1 – Control Efficiency) = ??? tons Account for control: Convert to tons: 2013 Emissions Inventory Workshop

  29. Stone Quarry – Primary Crushing Calculation 2013 Emissions Inventory Workshop

  30. Two Controls – Grain Handling Calculation Process: Grain handling for feed manufacture SCC: 30200801 Activity: 10,000 tons Pollutant: PM 10 Factor: 3 lbs/ton Primary Control: Cyclone Secondary Control: Baghouse 2013 Emissions Inventory Workshop

  31. A Complex Situation: Capture Efficiency, Primary Efficiency & Secondary Efficiency 2013 Emissions Inventory Workshop

  32. Two Controls – Grain Handling Calculation • Capture Device: Hood • Therefore, the other 10% is emitted directly to the atmosphere • Primary control device: Cyclone • The control equipment removes 80% of PM 10 from the emission stream. • Secondary control device: Baghouse • The control equipment removes 98% of PM 10 from the emission stream. 2013 Emissions Inventory Workshop

  33. Total E = Captured E + Uncaptured E = ??? tons Captured E = A * EF * CE * (1 – PE) * (1 – SE) Uncaptured E = A * EF * (1 – CE) 2013 Emissions Inventory Workshop

  34. A EF • Captured E = A * EF * CE * (1 – PE) * (1 – SE) Account for capture and controls: CE SE PE 2013 Emissions Inventory Workshop

  35. Uncaptured E = E * (1 – CE) Account for all PM 10 emissions: Convert to tons: 2013 Emissions Inventory Workshop

  36. 1 Amount to Hopper 5,400 lbs * 0.98 = 5,292 lbs 4 30,000 lbs of PM generated Amount to Hopper 27,000 lbs* 0.80 = 21,600 lbs 6 2 3,000 lbs of PM emitted “not captured” 27,000 lbs– 21,600 lbs = 5,400 lbs to the Baghouse Amount emitted to the atmosphere 5,400 lbs – 5,292 lbs = 108 lbs 108 lbs stack emissions + 3,000 lbs “not captured, emitted as a fugitive = 3,108 lbs = 1.554 tons 5 7 27,000 lbs of PM “captured” , sent to cyclone 3 2013 Emissions Inventory Workshop

  37. Other Examples If you would like to see an example calculation for another industry, process, or control equipment not presented today: Please email aei@deq.ok.gov and we will create an example for you. 2013 Emissions Inventory Workshop

  38. ODEQ Emissions Inventory Section Program Manager: Mark Gibbs Mark.Gibbs@deq.ok.gov Emissions Inventory Staff: Michelle Horn Michelle.Horn@deq.ok.gov Justin Milton Justin.Milton@deq.ok.gov Carrie Schroeder Carrie.Schroeder@deq.ok.gov http://www.deq.state.ok.us/aqdnew/emissions/index.htm 2013 Emissions Inventory Workshop

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