OP-II-3

PP-II-40Hydrodynamic regime in the apparatus for large values of Re are very similar tothe grid-generated turbulence. Such structures are well described by Kolmogorov’shypothesis of local isotropy [1], on the basis of which we had obtained the followingdependence⎛ ⎛ ⎞⎞⎛ ⎞⎜ ⎜ ⎟⎟⎜ ⎟⎜ Re* Re2 Re* Re31 ⎜ −tr ⎟⎟Re* ⎜ −trε⋅ ⋅ +Φ ⎟V= − ΦA ⋅γ⋅ Re*⎜ ⎜ 2 ⎟⎟⎜ 2 ⎟ ,⎜ ⎜ Re ⎟⎟tr⎜ Retr⎟⎝ ⎝ 3 ⎠⎠⎝ 3 ⎠where Re* – modified Reynolds number; Re tr – transition Reynolds number;Φ – cumulative distribution function; A, γ – constants.Centrifugal Reynolds number contain a geometric complex, corresponding to thesquared characteristic linear dimension, this complex can be convenientlyrepresented as the product of stage height h in power α and diameter D in power β.The sum of α and β must equal 2, orβ = 2 − α . Since that hydrodynamic andgeometrical similarity could be determinate with following numbersRe * =Re ГRe =nDν2α⎛ h ⎞Г = ⎜ ⎟⎝ D ⎠Based on our models we designed an apparatus for urea reduction of NOxprocess unit in Angarsk Catalysts and Organic Synthesis Plant [2].3 CO(NH 2 ) 2 + 3 NO + 3 NO 2 —> 3 CO 2 + 6 N 2 + 6 H 2 OThe process unit successfully cleaned the gas up to the sanitary norms. Theexperiments have confirmed the adequacy of the developed models and theapparatus high efficiency.The apparatus can be used in many processes: it can work as absorber,rectifying column or reactor.References[1]. Verigin A.N., Ignatyev M.A. (2003) 'Stirring fluids at high energy dissipation rate'. Int. EcologyEnergy Economics VII, pp. 166-176 (in Russian).[2]. Reznichenko S.O., Ignatyev M.A. (2008) “Urea reduction of NOx”, Int. Young Scientists to North-West Region Industry, p.92 (in Russian).The authors wish to express their gratitude to Mrs. Tselyutina M.I., the deputy chief of theResearch and Control Center – the chief of the scientific research development of theAngarsk Catalysts and Organic Synthesis Plant, without whose knowledge and assistancethis study would not have been successful.407