Power Industry Webinar Production & Promotion

Smart NOx Reduction - Optimizing Coal Mills, Coal/Air Balancing, Burners & SNCR/SCR Systems to Meet Tougher NOx Emission Standards

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In this informative webinar, Paul Kazalski, Combustion Engineer for Amec Foster Wheeler, will review key elements to NOx emission control alternatives for power plants.  Topics presented will include:

  • Focusing on preventing NOx formation in the first place through direct and indirect control methods

  • Reducing NOx by improving fuel fineness using aggressive lift liners for ball mills or using dynamic classifiers

  • Improving designs for tower distributors/riffle boxes and incorporating flow balancing valves for coal and air flow balancing

  • Optimizing staging of direct NOx reduction methods – Combustion Controls, Low NOx Burners, Overfire Air, Windbox Modifications, and Fuel Distribution

  • Addressing technology alternatives in terms of:

    • Combustion control technologies versus post combustion methods (SNCR and SCR)

    • High NOx Reduction vs. Cost

    • Capital Costs vs. Operating Costs

    • Phased Approach to NOx Removal

Below are some of the questions discussed during the webinar:

  • In a walk-down or inspection of the current equipment, what particular areas or equipment do you recommend focusing on?

  • Are there significant differences among the different types of coal (Colombian, South African, USA, Russian, etc.) regarding NOx emissions? Which parameters are critical to consider in the coal analysis?

  • Will our strategy be different when we try to control NOx emissions when dealing with natural gas, i.e., Gas Turbines?

  • How do you tell if you are feeding too much primary air versus overfire air or vice versa?

  • What is the importance of fuel nitrogen compared to air nitrogen when it comes to the formation of NOx in the combustion process?

  • In relation to changes in coal quality, do you see any problems inside the boiler when changing from a low volatile coal (<10%) to a high volatile coal (35%) in an FW arch boiler?