CN113705020A - 一种催化裂化汽油过程中的辛烷值损失的计算方法 - Google Patents
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Abstract
本发明涉及一种催化裂化汽油过程中的辛烷值损失的计算方法,其步骤是:收集催化裂化汽油装置的历史运行参数;将催化裂化装置的历史运行数据代入计算公式,计算得到催化裂化汽油过程中的辛烷值损失。本发明能够对,催化裂化汽油装置运行过程中的辛烷值进行有效的分析,并且克服现有辛烷值监测装置的不稳定性和无法应对实际需求的问题,计算出的辛烷值损失更准确,计算的方法更高效,为催化裂化汽油过程中的辛烷值损失实时监测提供了指导依据。
Description
技术领域
本发明涉及石油炼制与化工技术领域,尤其涉及一种催化裂化汽油过程中的辛烷值损失的计算方法。
背景技术
目前,在商品汽油中,高达70%的汽油由精制工艺生产。我国现有技术在汽油精制过程中普遍降低了辛烷值,每降低一个单位辛烷值相当于损失150CNY/t。汽油辛烷值损失计算的传统方法有马达法和辛烷法,但采用这些方法污染大,时间长,花费高,均不适用化工生产中的在线监测。而由于催化裂化汽油精制过程是连续的,虽然操作变量每3分钟就采样一次,但辛烷值(因变量)的测量比较麻烦,一周仅2次无法对应实际。
辛烷值损失的传统预测方法主要包括红外光谱分析方法和化工过程建模的方法。但由于不同的炼油工艺、不同产地的原油将会导致油品结构存在差异,而这类差异对红外光谱分析分析非常敏感,从而导致红外光谱分析预测方法在实际生产中应用效果不佳;而通过化工过程建模来预测辛烷值损失,由于炼化设备多,操作变量间具有强耦合性,机理建模对原料要求高,对优化相应不及时,所以效果并不理想。
对于汽油精制过程中的辛烷值损失,目前尚未有快速、高效的监测方法。针对于此,建立一种催化裂化汽油过程中的辛烷值损失的计算方法,可完善汽油精制过程中的辛烷值损失在线监测方法,对汽油精制过程中的辛烷值损失在线监测具有一定指导意义。
发明内容
本发明是为了解决汽油精制过程中的难以快速、准确的获得汽油的辛烷值损失,无法满足实际应用需求等问题。
为了解决上述问题,本发明的技术方案是:一种催化裂化汽油过程中的辛烷值损失的计算方法,包括以下步骤:
步骤一,根据催化裂化汽油装置历史运行参数,收集所述催化裂化汽油装置内的泵入口过滤器差压、出口总管温度、还原器温度、换热器壳程出口管温度、精制汽油出装置温度及原料油的辛烷值数据等计算参数;
步骤二,将收集到的计算参数代入公式中,计算得到催化裂化汽油装置过程中的辛烷值损失,其计算公式为:
式中:F为催化裂化汽油过程中的辛烷值损失;下标i为第i个变量;下标 ij为第i个变量的第j个值,X1为泵入口过滤器差压,KPa;X2为出口总管温度,℃;X3为还原器温度,℃;X4为换热器壳程出口管温度,℃;X5为精制汽油出装置温度,℃;X6为原料油辛烷值;max(Xi)为第i个变量的最大值;min(Xi) 为第i个变量的最小值;X′ij为第i项变量的第j个值处理后的值。
与现有的技术相比,本发明根据催化裂化汽油装置的特殊性提供了一种辛烷值损失计算方法,能够避免辛烷值测量装置的无法应对实际需求的问题,能够为催化裂化汽油装置提供在线辛烷值损失监测,计算的结果更准确,计算的方法更高效。
附图说明
图1为催化裂化汽油过程中的辛烷值损失的计算方法流程图;
具体实施方式
下面结合实施例对本发明作进一步的说明,但并不作为对本发明限制的依据。
本发明提供一种催化裂化汽油过程中的辛烷值损失的计算方法,该方法包含以下步骤:
步骤一,根据催化裂化汽油装置的历史运行数据,收集所述的催化裂化汽油装置运行的泵入口过滤器差压、出口总管温度、还原器温度、换热器壳程出口管温度,精制汽油出装置温度及原料油的辛烷值数据等计算参数;
步骤二,将处理后的数据代入公式中,计算得到催化裂化汽油过程中的辛烷值损失,具体的计算公式为:
式中:F为催化裂化汽油过程中的辛烷值损失;下标i为第i个变量;下标 ij为第i个变量的第j个值,X1为泵入口过滤器差压,KPa;X2为出口总管温度,℃;X3为还原器温度,℃;X4为换热器壳程出口管温度,℃;X5为精制汽油出装置温度,℃;X6为原料油辛烷值;max(Xi)为第i个变量的最大值;min(Xi) 为第i个变量的最小值;X′ij为第i项变量的第j个值处理后的值。
下面结合具体实例对本发明的应用原理作进一步描述。
一、催化裂化汽油装置设备信息
某石化企业的催化裂化汽油装置中,其泵入口过滤器差压、出口总管温度、还原器温度、换热器壳程出口管温度、精制汽油出装置温度及原料油的辛烷值历史数据如下表1所示。
表1催化裂化汽油装置基本信息情况
二、催化裂化汽油装置的辛烷值损失计算
对收集的数据进行处理计算得到X′ij的值如下表2所示。
表2变量处理后的值
以2020/4/14日数据为例,将通过变量处理后的数据代入公式中进行计算如下式所示:
其所有计算结果如下表3所示:
表2辛烷值损失计算结果
根据以上结果可以看出,本方法计算的辛烷值损失与实际的辛烷值损失的误差最大为9.37%,催化裂化过程中的辛烷值损失计算可靠,能够更有针对性地开展辛烷值损失在线监测工作,为催化裂化汽油装置的辛烷值损失实时监测及提升经济效益提供指导。
以上所述仅为本发明的较佳实施例而已,并不用以限制本发明,凡在本发明的精神和原则之内所做的任何修改、等同替换和改进等,均应包含在本发明的保护范围之内。
Claims (2)
1.一种催化裂化汽油过程中的辛烷值损失的计算方法,其特征在于包括以下步骤:
步骤一,根据催化裂化汽油装置历史运行参数,收集所述催化裂化汽油装置内的泵入口过滤器差压、出口总管温度、还原器温度、换热器壳程出口管温度、精制汽油出装置温度及原料油的辛烷值的历史数据作为计算参数;
步骤二,将收集到的计算参数代入公式中,计算得到催化裂化汽油装置过程中的辛烷值损失。
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