34 12 Journal of Sou th C hina U n iversity of Technology V ol. 34 N o. 12. : SimSci/PRO.
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1 ( ) Journal of Sou th C hina U n iversity of Technology V ol. 34 N o (N atu ral Science Edition) D ecem ber 2006 : X (2006) (1., ; 2., ) : SimSci/PRO.,, Grayson2Streed..,,,,., 22%.,. : ; ; SimSci/PRO ; : TQ : A, [ 123 ]., [ 4 ].,.,,.,,. [ 527 ],. : : ; ; ( ) : ( 19792),,,. E2mail: anglar@126. com, t/a,.,,,,.,,,. SimSci/PRO.,, ;,..,,,,,. 22%,..
2 12 : ,.., 0, [ 5 ],., 0. 58%, 14 [ 10 ]. 3,,.,,,. 1 Fig. 1 Schematic of the main fractionation column of the de2 layed coking unit 3. 2 m, ,.,,,, [ 8 ]., 3,,.,, [ 9 ].,,.,,,,. 1. 2,,., Refinery.,, Grayson2Streed [ 11 ]. Peng2 Robinson [ 11 ]. AP I(American Petroleum Institute) [ 11 ] ( T 2 ), ( FL ), ( E), ( SPL), (MX). T 2 24, FL. 2 Fig. 2 Simulation flowsheet of the main fractionation column , 2.
3 112 ( ) 34 1 Table 1 Comparison of the simulation results and on2site opera2 tional data of the fractionation column / (Nm 3 h - 1 ) / ( kg h - 1 ) / ( kg h - 1 ) / ( kg h - 1 ) / ( kg h - 1 ) / ( kg h - 1 ) / / / / / / / / / / / / / ( kg h - 1 ) / ( kg h - 1 ) / ( kg h - 1 ) / ( kg h - 1 ) / ( kg h - 1 ) / ( kg h - 1 ) / ( kg cm - 2 ) / ( kg cm - 2 ) / (kg h - 2 ) / Table 2 Comparison of simulation results and on2site data of p roducts p recision 1) % % % % % ). 1,, kg/h, kg/h, 7. 9%; kg/h, kg/h, 4. 3%. 2,,.,. ( 3),. 3, ( 7, 9, 13 ).,.,. 3 Fig. 3 Changes of vapor and liquid load along the trays ,,. 3. 2m, 0. 6m, 50mm,. ( 3), 7,, PRO, , 9, 4. 9, 3. 4, 1, 2, 3, 4, 9,.,.
4 12 : Table 3 Hydraulics calculation of the main fractionation column / / / / (cm 3 s - 1 ( / / / / /mm (kg h - 1 ) (kg h - 1 ) / /% (m 3 s - 1 ) /mm /m mm - 1 ) ) /% Pa Pa / s (m s - 1 ) (m s - 1 ) ( ( ( ( 9 ) ( ( ( ) 4 9 Fig. 4 D iagram of tray2load performance of the theoretical tray 9th 1 ; 2 ; 3 ; 4 ; 5 ; p : 5 s, ; 80% ; 1 /2. [ 12 ],,., Pa. 3,.,,.,..,,.,., 20%,.,,. 300%, 3. 2m,, t/a.,,.,.,. 4 (1), PRO. (2),,,. ( 3),. (4),,,.,
5 114 ( ) t/a. : [ 1 ],. [ J ]. :, 2003, 31 (4) : Guo Chong2zhi, L iang Yuan2feng. A new energy2saving p rocessing & it s Influences on coking drum p roperties in delayed coking p rocessing [ J ]. Journal of South China University of Technology: Natural Science Edition, 2003, 31 (4) : [ 2 ],,. [ J ]. ( ), 2005, 21 (3) : Qu Guo2hua, Huang Da2zhi, L iang W en2jie. Role and p rospects of delayed coking in China s petroleum p ro2 cessing [ J ]. Acta Petrolei Sinica ( Petroleum Processing Section), 2005, 21 (3) : [ 3 ] Rodr guez2reinoso F, Santana P, Romero E Palazon, et al. Delayed coking: Industrial and Laboratory A spects [ J ]. Carbon, 36 ( 1) : [ 4 ] Chen Q L, Yin Q H. Energy2use analysis and imp rovement for delayed coking units [ J ]. Energy, 2004, 29 ( 12 /13 / 14 /15) : [ 5 ]. [ J ] , 22 (9) : Yang Ke. Process simulation and analysis of main frac2 tionation column in FCC unit [ J ]. Chem ical Industry and Engineering Process, 2003, 22 ( 9) : [ 6 ] Zheng L i2gang, Edward Furim sky. ASPEN simulation of cogeneration p lants [ J ]. Energy Conversion and Manage2 ment, 2003, 44 (11) : [ 7 ] Smejkal Q, Λo gm. Comparison of computer simulation of reactive distillation using ASPEN PLUS and HYSYS soft2 ware [ J ]. Chem ical Engineering and Processing, 2002, 41 (5) : [ 8 ]. [M ]. :, [ 9 ]. [M ]. :, [ 10 ]. [ J ]., 2003, 10 (1) : W ang Hong2jiang. The choice of column stage efficien2 cies in simulation [ J ]. Petrochem ical Industry Technolo2 gy, 2003, 10 (1) : [ 11 ] SIMSC I COMPANY. Simulation Science Inc PRO / 6. 0 [ CP /CD ]. California: SIMSC I Company, [ 12 ]. [M ]. :, Process Simulation and Enlarged Capacity Analysis of Ma in Fractionation Column in Delayed Coking Un it W ang Chun2hua 1 Chen Q ing2lin 1 Hua B en 1 Chen Z i2jian 2 (1. Key Laboratory of Enhanced Heat Transfer and Energy Conservation of the M inistry of Education, South China Univ. of Tech., Guangzhou , Guangdong, China; 2. Huizhou Refinery of China National Offshore O il Corporation, Huizhou , Guangdong, China) Abstract: This paper aim s at the strategies to sim ulate the distillation p rocess in a delayed coking unit (DCU ) by using the simulation software of SimSci/PRO. Since the components of the reaction vapor in the DCU fractiona2 tion column are unknown and there are imbalanced trays at the bottom of the column, the composition of the high2 temperature oil and gas feedstock in the fractionation column is inversely conjectured according to the composition of the p roducts, and the whole colum n is divided into two sections, namely the bottom heat2exchange section and the rectifying section. Then, the Grayson2Streed p roperty choice m ethod is adop ted to simulate the fractionation p rocess. The simulated results, which are consistent w ith the on2site operational data, indicate that there is an ob2 vious fluctuant flow rate of the gas and the liquid along the trays. Moreover, a hydraulics calculation is carried out for the main fractionation colum n, and a tray2load performance diagram is drawn. The results show that weep ing ex2 ists at most trays, which can be solved by p lugging up some holes in the weep ing trays. Finally, in accordance with the p roduction requirements in the refinery, a sim ulation and a hydraulics calculation are perform ed for the fraction2 ation column whose p rocessing capacity is increased by 22%. fractionation column can m eet the requirem ents of p roduction w ith enlarged capacity. It is thus concluded that a partial revamp ing of the Key words: delayed coking unit; p rocess simulation; SimSci/PRO ; hydraulics analysis
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