FLUID COKING is a continuous process that thermally converts heavy hydrocarbons, such as oil sands bitumen, to lighter and higher‐value products by horizontal spray injection onto a fluidized bed of hot coke particles. The cyclone sections of commercial fluid coker reactors experience fouling during typical operation, which limits unit run lengths. The main objective of this work is to improve fluid coker reliability by proposing cyclone fouling mitigation strategies based on practical operation modifications. This study developed a process simulation in Aspen Plus to establish the combined impact of vapour‐liquid equilibrium, endothermic thermal cracking reactions, pressure changes, and overall fluid dynamics in the selected fluid coker control volumes. The hydrocarbon composition was defined by applying an assay characterization of distillation data for representative hydrocarbon streams. Case studies were performed to determine the sensitivity of the predicted temperatures and hydrocarbon condensate flow rates for: (a) the burner‐to‐fluid coker transfer line temperature; (b) the hot coke flow rate; (c) hot coke entrainment from the freeboard region; and (d) scouring coke flow rate in the horn chamber. The scouring coke flow rate was identified as the most promising process lever to mitigate fluid coker cyclone fouling.

中文翻译：

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烃缩合模型减轻流体焦化器旋风积垢

流体焦化是一个连续的过程，该过程通过在热焦炭颗粒的流化床上进行水平喷射注入，将重质碳氢化合物（例如油砂沥青）热转化为轻质和高价值产品。商用流体焦化反应器的旋风分离器部分在典型操作期间会结垢，这限制了单元运行时间。这项工作的主要目的是通过提出基于实际操作改进的旋风结垢缓解策略来提高流体焦化器的可靠性。这项研究在Aspen Plus中开发了一个过程模拟，以建立蒸气-液体平衡，吸热热裂解反应，压力变化以及所选焦化器控制体积中的整体流体动力学的综合影响。通过应用代表性烃物流的蒸馏数据的测定表征来定义烃组成。进行了案例研究，以确定以下各项的预测温度和烃冷凝液流速的敏感性：（a）燃烧器至流体焦化器输送线温度；（b）热焦炭流量；（c）来自干舷区域的热焦炭夹带；（d）搜寻在喇叭室内的焦炭流速。精炼焦炭流速被确定为减轻流体焦化器旋风分离器结垢的最有前途的工艺杠杆。（c）从干舷区夹带热焦炭；（d）搜寻在喇叭室内的焦炭流速。精炼焦炭流速被确定为减轻流体焦化器旋风分离器结垢的最有前途的工艺杠杆。（c）从干舷区夹带热焦炭；（d）搜寻在喇叭室内的焦炭流速。精炼焦炭流速被确定为减轻流体焦化器旋风分离器结垢的最有前途的工艺杠杆。