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Guidelines for Tuning for PF/CDU/VDU in forward prediction with crude assays 用原油评价数据预测初馏塔/常压塔/减压塔模型的调整操作指导 1. Enter Operating Data –Drum, Ovhd, FZ, Btms Temperatures and Pressures in the Prof

iles Tab 在 Distop 基本页面上输入回流罐、塔顶馏出物、进料闪蒸、塔底温度和压力等数据。 2. enter PA Data 输入中段回流数据 3. Mass balance: 质量平衡 a. adjust ICPs to Actual Flow Rates 调整初始切割点温度以满足装置实际的产品流量

b. make sure flash zone/overflash matches actuals 确认闪蒸区和过汽化段符合实际装置 数据 4. Heat balance 热平衡 a. enter Striper/Reboiler rates-adjust stripper efficiency/reboiling rate to match delta T across Stripper/Reboiler(especially btms section)输入汽提塔/再沸器流量-调整汽提效 率/再沸流量来满足汽提和再沸所需的温变(尤其是塔底段) 5. Tuning 调整 a. adjust ICPs to match the 50% points 调整初始切割点来满足 50%点

b. adjust section efficiencies/shape factors either with auto-calibrator 调整塔段效率/前后 端因子也可以自动调节 1) option1: use auto-calibrator for all section efficiencies and stripper efficiencies(use this typically for VDUs with few side cuts)选项 1:用自动校核来调整所有塔段效 率和汽提效率(典型应用是减压塔等具有较少侧线产品的塔) 2) option2: use auto-calibrator only on section efficiencies and btms product shape factors and then adjust side-cut shape factors manually 选项 2:用用自动校核来调 整所有塔段效率和塔底产品影子因子然后手动调节侧线影子因子 3) analyze results to make sure section efficiencies and shape factors do not contradict each other( only exception is to match flash points)分析结果以确认塔段效率和影 子因子不发生矛盾(闪点除外) c. Use BIPs as last result to match 最后用基本交换参数来调整

d. Start from bottom and move up 从塔底开始调整,逐步往上进行调整 Auto-calibrator set up 自动校核设置 1. Go to Petro-SIM Calibration in the Calibration tab from Distop 在 Distop 页面进入 Petro-SIM

Calibration 校核 2. Set-up Tab 设置表 a. 设置 Dist D86,选定进料产品流股,选择 synth type 。set Dist D86,enable feed product streams, synth type for product streams 3. Input Data Tab 输入数据表 a. click Add set to display streams 点击添加设置,显示流股

b. enter mass flow(use adjusted mass flow rates), Density and Distillations for product streams 输入质量流量(用调整的质量流量) ,和产品的密度和馏份。 c. store Petro-SIM cut points in excel for future use 将 Petro-SIM 切割点储存在 excel 中以 备后用 d. hit Synthesize Button 点击合成按钮 4. Run Tab 运行表 a. select independent Variables and Objective 选择自变量和目标 1) recommend selecting section efficiencies and btms shape factors 推进选择塔段效 率和塔底影子因子 2) unclick feed from set-up tab and hit accept 在设置表中将进料点掉并点击接受 3) copy cutpoints back to the Petro-SIM model from the excel spreadsheet 在 excel 表 中将切割点复制到 Petro-SIM 模型中 b. hit Calibrate button(Step size 1,to1. 0.001,iterations 50,per size 0.08)点击校核按钮(步 长 1,迭代次数 50,每步 0.08) c. after satisfactory results. Hit Accept button 得到满意的结果后点击接受按钮

5. Use front shape factor adjustments on manual to match flash point and then use back shape factor preferably if they do not contradict the efficiencies. 手动用前端因子调整闪点,如果与效率不发生冲突,用后端因子再调整,使数据更接近 实际生产数据。


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