We have developed unique continuous advanced control schemes to control FGR (Flue Gas Recirculation Boilers) to reduce NOx amounts.

GREEN MANTIS, LLC Boiler Controls and Optimizations services include:

  • Implementation of highly efficient Cross-Limiting control strategies.

  • Subcritical, supercritical, and ultra-supercritical fossil-fired units (coal, gas, oil)

  • Circulating Fluidized Bed (CFB) units

  • Combined cycle balance-of-plant (BOP) applications

  • Cogeneration (cogen) plants

  • Alternative fuel plants (wood/wood waste, biomass, etc.)

  • Blended fuel type plants with varying fuel BTU content

Typical considerations include tuning, characterization, and/or control strategy improvements for:

  • Primary and secondary air flow(s)

  • Air/fuel ratio control

  • Air demand/flow curves

  • ID/FD fans

  • Fuel demand, fuel flow

  • Furnace pressure control

  • Excess O2 / O2 Trim

  • Boiler demand

  • Flue gas recirculation

  • Pulverizer air

  • Throttle pressure

  • Boiler-follow and turbine-follow modes

  • Unit coordinated control

  • Supporting loops, such as:

    • Superheat and reheat steam temperatures

    • Desuperheater sprays and attemperation

    • Feedwater control

    • Drum level control (1-element and 3-element)