I-NO_X^® Integrated NO_X Reduction System

Fuel Tech’s I-NO_X^® Integrated NO_X Reduction System combines proven technologies for cost-effective NO_X control from the point of combustion to the stack. These combined technologies, capable of NO_X reduction exceeding 80%, may be applied as both a retrofit solution for existing units or  new generating units.

The front end of an I-NO_X system utilizes Fuel Tech’s proven combustion technologies including: Low NO_XBurners (LNB), burner modifications, and over-fire air (OFA) systems. These combustion solutions are then built upon using our post combustion NO_X control products which include urea-based Selective Non-Catalytic Reduction (SNCR) along with urea- and ammonia-based Selective Catalytic Reduction (SCR) systems.

The distinguishing features that sets the I-NO_X technology apart is our commercial experience and state-of-the-art design capabilities that allow us to understand the working relationships of the combined NO_X reduction technologies. These capabilities also allow us to evaluate each application and tailor a solution that maximizes the contribution of each technology in our suite of offerings without pushing any one process to the point that it impacts boiler operation or negatively impacts another NO_X reduction process downstream.

High Performance NO_X Reduction at Low Capital Cost

• Lower capital cost vs. conventional SCR

• Minimizes SO₂ to SO₃ conversion

• Combines commercially proven technologies

• Proven Mercury oxidation of 90% +

The I-NO_X System offers significant lower capital costs than traditional SCRs and provides the option of a staged capital investment 

Components of an I-NO_X System

SCR process design is the most critical step to successful SCR performance. Maximizing SCR performance and minimizing its impact on plant operations requires a thorough understanding of each application. Fuel Tech has many tools to provide the most efficient design for our ASCR™ Advanced SCR systems. Our experimental model studies combined with Computational Fluid Dynamics (CFD) modeling provide insight into the flue gas parameters and flow conditions to develop the optimum duct configuration for the SCR. Fuel Tech works with industry leading catalyst suppliers to determine the appropriate catalyst type and formulation for any given application.

The ASCR technology component of an I-NO_X System incorporates a high performance SCR reactor where space permits. By utilizing an integrated technology approach, the catalyst quantity, weight, and space requirements can be minimized, potentially leading to the elimination of new foundations and the need to install new "steel to grade."

The scope of supply for Fuel Tech's I-NO_X Systems include design, engineering, procurement, delivery, and startup of the following:

• Combustion Modifications in the Form of LNB and OFA
• NO_xOUT^® and HERT™ SNCR Systems
• ASCR™ Advanced SCR Systems and Components
• Modeling and Process Design with Performance Guarantees
• Static Mixer
• Large Particle Ash Screen (LPA)
• GSG™ Graduated Straightening Grid
• Ammonia Injection Grid (AIG)
• Catalyst Specification and Supply
• SCR Reactor Design and Supply
• System Startup, Optimization, and Training Services

Fuel Tech’s extensive experience base and financial status allow us to offer single source responsibility. System installation and installation management services are also available to meet customer needs. Integrated I-NO_X systems may be applied to retrofit and new boiler applications, and our experience includes installation of systems on more than 800 units, SCR design and consulting support on more than 50,000 MWs, and over 20,000 MWs of AIG Tunings.

Fuel Tech’s I-NO_X system is a combination of technologies that provide cost effective NO_X reduction and flexibility in meeting rapidly changing regulatory and public policy drivers. I-NO_X systems can be implemented in stages over time, providing financial advantages of both lower total installed capital costs and the ability to stage capital expenditures.