加氢装置运行全周期高压换热器垢阻计算与应用效果

采用MATLAB软件，跟踪计算某炼油厂蜡油加氢装置高压换热器运行3年来的垢阻。计算结果表明, 运行期间高压换热器结垢速率可控，运行末期总垢阻为1.2×10-3（m2.K)/W。生产中根据结垢速率逐渐将阻垢剂加注浓度由100 μg/g下调至25～35 μg/g，单周期节约阻垢剂成本约1 159万元。此外，基于ASPEN软件的换热器模块计算理论，构造采用ASPEN软件计算换热器垢阻的方法。

CALCULATION OF FOULING IN HIGH-PRESSURE HEAT EXCHANGER OF A HYDROGENATION UNIT FOR THE WHOLE OPERATION CYCLE AND APPLICATION EFFECT

With MATLAB software, the fouling of high-pressure heat exchanger in a gas oil hydrogenation unit was calculated throughout 3-year operation. The calculation results showed that the fouling rate of heat exchanger during operation was controllable; at the final stage of operation, the total resistance of scale was 1.2×10-3 (m2?K)/W. Based on the calculation results of fouling rate, the injection of scale inhibitor during operation was gradually reduced from 100 μg/g to 25-35μg/g, so that in this single operation cycle, the cost saving of scale inhibitor reached 11.59 MRMB. Besides, a fouling calculation method of heat exchanger based on ASPEN PLUS software and film coefficient theory was set up and the accuracy of this method was discussed as well.