181 ~ 184 TMP. 5 ε s CORH. 90 μm kg / Vol. 31 No. 3 May Petrochemical Technology & Application TE CB

Transcription

1 Petrochemical Technology & Application Vol. 31 No. 3 May ~ 184 * S TE B TMP m 0. 8 m 3-4 ε s 5 ε s 6-7 TMP * CORH 90 μm kg / 1 m kg / m * CB *

2 m 1. 8 m 0. 1 m 8. 0 m ε s U g 8. 0 ~ ~ 1. 8 m /s ε s G s 200 ~ 300 kg / m 2 s 3. 5 m 1. 3 U g G s 20 s PV - 6 ε s 50 khz 15 s m 2 ~ 7 11 r /R r R ε s ε s S U g ε s 0. 3 U g ε s 0. 3 ~ 0. 4 ε s 0. 2 ~ 0. 3 ε s 9 ε s ε s ε s ε s 2 ε s G s = 300 kg / m 2 s U g = 12 m /s m G s 300 kg / m 2 s U g 2. 1 ε s 12 m /s ε s ε s m G s = 300 kg / m 2 s U g = 12 m /s

3 ε s ε s ε s 0. 4 ~ ε s ε s TMP ε s 4 U g G s ε s 2. 3 ε s U g G s ε s U g G s 300 kg / m 2 s U g 12 m /s G s U g ε s U g = 8 m /s G s = 200 kg / m 2 s U g = 8 m /s G s = 300 kg / m 2 s U g = 12 m /s G s = 200 kg / m 2 s 4 U g = 12 m /s G s = 300 kg / m 2 s ε s m ε s 30 s 6 ε s ε s 3 1 r /R 0 2 ε s 2 r /R r /R U g G s ε s G s U g ε s U g = 8 m /s G s = 200 kg / m 2 s U g = 8 m /s G s = 300 kg / m 2 s U g = 12 m /s G s = 200 kg / m 2 s U g = 12 m /s G s = 300 kg / m 2 s 5 ε s

4 m ε s 3 a. ε s S U g ε s ε s ε s G s U g b. ε s ε s G s U g ε s CFB risers J U g c. ε s Li C Yang C Shan H. Maximizing propylene yield by two - stage riser catalytic cracking of heavy oil J. Industrial & Engineering Chemistry Research fluidization regime J. AIChE Journal J J Berruti F Pugsley T Godfroy L et al. Hydrodynamics of circulating fluidized bed risers A review J. The Canadian Journal of Chemical Engineering Gan J Zhao H Berrouk A S et al. Numerical simulation of hydrodynamics and cracking reactions in the feed mixing zone of a multiregime gas - solid riser reactor J. Industrial & Engineering Chemistry Research J Zhu H Zhu J. Characterization of fluidization behavior in the bottom region of CFB risers J. Chemical Engineering Journal Dry R Christensen I White C. Gas - solids contact efficiency in a high - velocity fluidised bed J. Powder Technology Zhu J X Manyele S V. Radial nonuniformity index RNI in fluidized beds and other multiphase flow systems J. The Canadian Journal of Chemical Engineering Issangya A S Grace J R Bai D et al. Radial voidage variation in. The Canadian Journal of Chemical Engineering 12 Marzocchella A Zijerveld R C Schouten J C et al. Chaotic behavior of gas - solids flow in the riser of a laboratory - scale circulating fluidized bed J. AIChE Journal Cui H Mostoufi N Chaouki J. Characterization of dynamic gas - solid distribution in fluidized beds J. Chemical Engineering Journal Zhu H Zhu J. Comparative study of flow structures in a circulating - turbulent fluidized bed J. Chemical Engineering Science Qi X Zhu H Zhu J. Demarcation of a new circulating turbulent J FCC 2 Peng B Zhang C Zhu J. Numerical study of the effect of the gas J and solids distributors on the uniformity of the radial solids concentration distribution in CFB risers J. Powder Technology Xu J Zhu J. Effects of particle properties on flow structure in a 2 - D circulating fluidized bed Solids concentration distribution and flow development J. Chemical Engineering Science

5 Complexation denitrification technology for coker gas oil LIU Jie LI Wen - shen LI Xiao - ou LI Dong - sheng Department of Petrochemical Engineering Liaoning University of Petroleum and Chemical Technology Fushun China Abstract Nitride in coker gas oil was removed with the mixture of the polar complexing agent hereinafter referred to as complexing agent of Lewis acid and organic solvent hereinafter referred to as adjuvant as denitrogenation agent. The optimum conditions determined by orthogonal experiment were reaction temperature 65 denitrogenation agent dosage volume ratio of complexing agent to coker gas oil adjuvant dosage volume ratio of adjuvant to complexing agent The results showed that under these conditions the yield of refined oil could reach % content of total nitrogen was μg /g. Key words coker gas oil complexation denitrogenation basic nitride catalytic cracking 184 Study on solids concentration distribution in the diameter - enlarged section of a novel riser reactor ZHU Xiao - lin LI Chun - yi YANG Chao - he LIU Yi - bin State Key Laboratory of Heavy Oil Processing China University of Petroleum East China Qingdao China Abstract In a circulating fluidized bed system axial and radial solids concentration distributions inside a novel riser and the effect of operating conditions were investigated moreover probability density analysis of transient solids concentration signals was also conducted. The results showed that the cross - sectional averaged solids concentration along this novel riser presented as S - type with much higher solids concentration in the diameter - enlarged section than that of the bottom region of conventional riser. Compared with the bottom region of conventional riser more uniform radial flow structure with higher solids concentration in the central region and almost saturated solids concentration near the wall was observed in the diameter - enlarged section. In addition cross - sectional averaged solids concentration and local solids concentration at all radial positions increased with increasing solids circulation rate and decreasing superficial gas velocity. Analysis of transient concentration signals in diameter - enlarged section demonstrated that both fluctuation amplitude and frequency were very high and the corresponding probability density distributions were uniform which would further enhance the gas - solids mixing and intensify the interaction between gas and solids phases. Key words novel riser diameter - enlarged section solids concentration distribution transient concentration signal probability density analysis