重油催化裂化主分馏塔改造与模拟优化

发布时间：2018-06-26 03:38

本文选题：催化裂化-主分馏塔 + 改造　；参考：《西北大学》2015年硕士论文

【摘要】：山东某炼厂60万吨/年催化裂化装置进行扩能改造,改造目标年产80万吨,催化裂化后产品分布从多产液化石油气与汽油改造为多产汽柴油。本文对80万吨/年催化裂化装置配套的主分馏塔进行改造,对分馏塔在整体装置不改变的前提下进行生产能力的提高,使之与80万吨/年催化裂化装置能力配套,同时满足产品比例的调整,达到炼厂的改造要求。通过对原有分馏塔的分析得出已存在的问题：①生产能力从与60万吨/年催化裂化装置配套改造成为与80万吨/年催化裂化装置配套；②调整分馏塔产品分割比例；③解决现有分馏塔塔顶结盐塔釜结焦问题。这些问题是此次改造过程中的主要目标。对于原油分馏塔出现的问题文中提出了相应的改造方案：①对分馏塔进行塔板改造,通过模拟软件得出塔板的结构参数,进行水力学分析,对塔板结构进行优化,选择适宜的塔板构件及结构参数；②进行分馏塔工艺操作条件优化,利用模拟软件优化分馏塔操作工艺参数。③对分离塔出现的结盐、结焦问题提出相应的解决方案,提出电脱盐罐串、并相结合来降低原料中的盐以及对阻垢剂的有效利用来降低结焦。在塔板改造过程中对所选的两种塔板分别进了模拟以及水力学分析,经分析两种塔板组合效果比单一塔板效果更佳因此,提出了混合塔板方案,依据分析以及模拟不同组合得出合适的方案,对最终方案进行详细模拟与核算,优化得出相对比较理想的改造方案。综合所进行的改造方案,经过软件模拟、核算以及优化,得到适宜的塔板结构参数以及工艺操作条件,最终的结果满足此次炼厂的改造要求。
[Abstract]:The capacity expansion of a 600000 t / a FCC unit was carried out in a refinery in Shandong Province, with an annual output of 800000 tons per year. After FCC, the product distribution was transformed from LPG and gasoline to gasoline. In this paper, the main fractionator of 800000 t / a FCC unit is reformed, and the production capacity of the fractionator is improved on the premise that the whole unit is not changed, so that the capacity of the FCC unit can be matched with that of the 800000 t / a FCC unit. At the same time to meet the product proportion adjustment, to meet the refinery transformation requirements. Based on the analysis of the original fractionator, the existing problem of production capacity of 1: 1 has been obtained, from revamping with 600000 t / a FCC unit to adjusting the proportion of fractionating tower product with 800000 t / a FCCU. (3) to solve the problem of coking in salt tower at the top of fractionator. These problems are the main goal of the transformation process. For the problems of crude oil fractionation tower, the corresponding revamping scheme: 1 is put forward in this paper. The tray structure parameters are obtained by simulation software, the hydraulic analysis is carried out, and the trays structure is optimized. The optimum operation conditions of fractionating column were optimized by selecting the appropriate trays and structural parameters, and the corresponding solution to the problem of coking was put forward by using simulation software to optimize the operation parameters of the fractionator by optimizing the process parameters of the fractionator by using the simulation software to optimize the salt deposition and coking of the separation tower. In order to reduce the coking, the salt in the raw material and the effective use of the scale inhibitor are reduced by the combination of the electric desalination tank string and the combination of the electric desalination tank string. In the process of tray reconstruction, the two trays selected were simulated and hydraulically analyzed respectively. After analyzing that the combined effect of the two trays was better than that of single tray, a hybrid tray scheme was put forward. According to the analysis and simulation of different combinations, the suitable scheme is obtained, the final scheme is simulated and calculated in detail, and the relatively ideal reconstruction scheme is obtained by optimization. Through software simulation, calculation and optimization, suitable tray structure parameters and process operation conditions are obtained, and the final results meet the requirements of the revamping of the refinery.
【学位授予单位】：西北大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE962

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