Reduction (SNCR) Systems
|DNT has successfully executed over 50
design/supply/guarantee SNCR contracts on a broad
range of process applications: MSW
Incinerators, Biomass Stoker Boilers, Biomass CFB's,
Biomass BFB's, Cement
Kilns, Pulverized Coal, Medical Waste
Incineration, etc. The method can use either urea or
ammonia, and we have provided a similar number of
SNCR can continuously achieve 40-60% NOx reduction in
Solid Fuel Stoker Applications and is the technology of
choice to avoid the painful capital and operating costs of
catalytic systems. I combination with improved
Overfire Air or Flue Gas Recirculation, 70-80% NOx
reduction is being demonstrated in practice.
knows where, how, and how much reagent to inject into your
With the correct type, number and location of
injectors, DNT's system
has superior chemical efficiency - which means
achieving your permit requirements at the lowest
ammonia slip and reagent consumption.
DNT can perform Computational Fluid Dynamic and
Chemical Kinetic Modelling if needed. However,
most Biomass and MSW boilers need not bother . . .
DNT's experience is better than pretty graphs.
|The liquid reagent is received,
stored, and processed in "Standard" design modules,
prefabricated to the maximum extent possible. Provided with or without the PLC
of your choice. Simple, Industrial Grade and Efficient.
||The key component is the injection
nozzle. DNT's Version
4 is now in operation
at several facilities - as part of DNT systems or
OEM replacement. The Version
4 injector doesn't clog internally, and no
maintenance for months in brutal environments.
Three basic sizes depending upon liquid flow and
pentration distance. Auto-Retract design
proven and available for applications with multiple
DNT has provided an equal number of
urea and ammonia units. In most cases,
Aqua Ammonia is preferred due to the lower annual cost
of chemical, simpler design related to chemical
temperature maintenance, better NOx reduction at a given
stoichiometry, and no/lower formation of N2O. Urea
can be a good choice for smaller units with reasonable
NOx reduction requirements. The Total Installed Cost for
the two options is approxiamtely the same.