title: Analysis of mixing conditions and multistage irradiation impact on NOxremoval efficiency in the electron beam flue gas treatment process.
abstract: In the process of electron beam flue gas treatment (EBFGT), most energy is spent on NOxremoval. The dose distribution in the reactor is not uniform and the flue gas flow pattern plays an important role in the process efficiency. It was found that proper construction of the reactor may increase the energy efficiency of the process. The impact of the number of irradiation stages and mixing conditions on NOxremoval efficiency was investigated for an ideal case and a practical solution was presented and compared with previously known EBFGT reactor constructions. The research was performed by means of computational fluid dynamics methods in combination with empirical Wittig formula. Two versions of dose distribution were taken for calculations. The results of the research show that for an ideal case, application of multistage irradiation and interstage mixing may reduce the energy consumption in the process by up to 39%. On the other side, simulation of reactor construction modification for two-stage irradiation results in 25% energy consumption reduction. The results of presented case study may be applied for improving the existing reactors and proper design of future installations.
authors.affiliation: a Institute of Nuclear Chemistry and Technology , Warsaw , Poland.
authors.forename: Andrzej
authors.initials: A
authors.lastname: Pawelec
authors.affiliation: a Institute of Nuclear Chemistry and Technology , Warsaw , Poland.
authors.forename: Andrzej
authors.initials: A
authors.lastname: Dobrowolski
mesh_terms: D000393:Air Pollutants / Q000737:chemistry*; D000397:Air Pollution / Q000517:prevention & control*; D004583:Electrons; D009589:Nitrogen Oxides / Q000737:chemistry*
chemical_list: D000393:Air Pollutants; D009589:Nitrogen Oxides
keywords: Electron beam technology; NOx removal; energy efficiency; flue gas treatment; numerical modelling