Practical Technology for Combustion Improvement and Emissions Reduction

As a global leader in combustion optimization and multi-pollutant reduction, Nalco Mobotec brings innovative solutions to the world’s air pollution control challenges. We offer practical approaches to the control and reduction of emissions such as NO_x, SO_x, CO, PM (Particulate Matter), and mercury, while maximizing plant efficiency. In addition, Nalco Mobotec’s solutions can accommodate fuel flexibility, biomass conversions, or cofiring. Rather than requiring major investment in capital equipment, Nalco Mobotec’s finessed approach optimizes the efficiency of your current assets.

ROFA^® (Rotating Opposed Fire Air) technology is Nalco Mobotec’s patented design for setting the volume of the furnace in rotation via an asymmetric boosted over-fire air system. The induced rotation and turbulence prevent laminar flow and result in superior mixing and temperature distribution for more effective combustion. Staging the combustion allows for optimal emissions control—inducing reduction of NO_x, SO_x, CO, and particulate matter while minimizing excess air and unburned carbon in the fly ash. This system has demonstrated significant NO_x reductions, with lower reagent use or no need for a reagent whatsoever. ROFA technology also allows for the flexibility to fire various fuels or cofire biomass.

ROTAMIX^® technology is a patented technique for the rotary mixing of chemicals and/or additional fuel. This system combines air injection nozzles with automatically regulated lances for injection of chemicals into the furnace where the temperature is most favorable. Combined with ROFA technology, the ROTAMIX system can dramatically reduce NO_x emissions, promoting meaningful air pollution control. Additionally, demand for chemicals is drastically reduced, when compared to other SNCR systems. The ROTAMIX system is also used to inject fireside chemical treatments, thus minimizing slag deposition and/or corrosion in the system.

ROFA FSI (Furnace Sorbent Injection) technology reduces capital and operating costs through optimal in-furnace mixing of chemicals such as lime, limestone, soda ash, and other sorbents. This air pollution control technology is effective for capturing SO₂, SO₃ and mercury.

Mercury control technologies from Nalco Mobotec provide solutions to address site-specific operating and mercury emission control needs. The MERCONTROL™ family of solutions includes halogen injection, non-carbon sorbents that do not compromise fly ash quality, and FGD (flue gas desulfurization) re-emission control approaches that bind mercury in the waste system of a FGD unit. Nalco Mobotec also offers on-site activated carbon production technology for additional emissions control.

The MagMill™ System is a dry magnetic separation technology that combines the existing pulverizer with a magnetic separator. This method removes mineral contaminants from coal more efficiently and economically than Level IV wet cleaning at the prep plant. The MagMill system reduces levels of the following pollutants and particles: mercury, sulfur, arsenic, selenium, pyrite, ash.

Fireside Chemical Treatment (FCT) programs are applicable to any combustion system whose availability and efficiency are diminished by slag or fouling deposits, whether boilers, kilns, incinerators, or others. These deposits result from the combustion of ash-producing fuels such as coal, heavy oil, wood products, and waste materials. Nalco Mobotec FCT employs a variety of proprietary slag-inhibiting or combustion-enhancing chemistries. These, combined with Nalco Mobotec’s unique application technologies, are designed to maximize program effectiveness and minimize customer cost.