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EMISSIONSEmissions mitigation:taking the DeNOx pathAuxiliary & ignition burners.In 2011, ERC delivered the first solid commercial SNCR plant for a pulverized hardcoal firedboiler of 650 t/h, once again confirming itself as one of the market and technology leaders inEurope for DeNOx plants for flue gas denitrification, reports WIP.ERC GmbH is one of the leadingdevelopers and manufacturers ofadditives, process additives andequipment technology for the combustionof fossil and biogenic fuels.The company has - with somejustification - earned a reputation as oneof the market and technology leaders inEurope for DeNOx plants for flue gasdenitrification.One of ERC’s specialist areas is in thefield of Low NOx Power Burners. Duringthe use of liquid or gaseous fuels forpower generation in combustion plants,pollutants are formed that are emittedwith the flue gas.Some of the main pollutants, whose formationcannot be completely avoideddespite optimised combustion methods,are nitrogen-oxides (NOx).Depending on the quality of combustionand the fuel used, carbon-monoxide (CO)can also form.For this reason all industrialisedcountries have adopted laws whichrestrict the formation of nitrogen oxideand carbon-monoxide emissions.With regard to combustion the followingapplies: the higher the NOx emissionlevels, the lower the CO emissions, andvice versa.Low NOx PowerBurner.Built in a low-NOxversion ERC performanceburners meet all currentemission requirements.A low-NOx burner isable to operate with lowNOx emissions and alsowith low CO emissions.The main features ofERC power burners arethe triple air-staging andthe internal flue gasrecirculation.Due to their specialconstruction, ERC powerburners have very low pressure losses inthe combustion air, says the company.In addition, it is also possible to adjustthe setting of all regulating devices duringoperation which significantly speeds upthe commissioning and set-up times.ERC manufactures power burners whichcan be operated either with fresh air orwith gas turbine exhaust.DENOx Plants: When burning coal,petroleum products, natural gas as well asdomestic and hazardous waste for energyproduction pollutants are created, thatare emitted with the flue gas.Thus, significant amounts of nitrogenoxides (NOx), one of the main pollutants,forms despite optimized combustion.Through the reaction of nitrogen-oxideswith other atmospheric constituents,ozone is created and leads to theso-called summer smog.Other reaction products such as nitricacid, reach the water and soil with theprecipitation in the form of acid rain. Theresulting nitrate accumulation has anegative impact on humans, plants andanimals. For these reasons almost allindustrialised countries have adopted lawsto restrict nitrogen-oxide emissions.Burner for special combustion.As aGas firing.company, ERCspecialises inthe development&manufactureof a number of Oil firing.highlyefficientdenitrificationsystems,individuallytailored fordifferentcombustion plants. These are:* SNCR: Selective non-catalytic reduction- at high temperatures between 850 and1,100 °C.* SCR: Selective catalytic reduction atlow temperatures between 200 and 450°C.* COMBINED: Combining the advantagesof the SNCR process with those of theSCR processWIPInternet linkwww.erc-online.deW ORLDWIDE I NDEPENDENT P OWER • MARCH 201221