3.2 Mt/a加氢处理装置长周期运行评价与潜能分析

PERFORMANCE EVALUATION AND POTENTIAL ANALYSIS OF A 3.2 Mt/a HYDROTREATING UNIT AFTER LONG TERM RUNNING

为进一步提高装置运行水平,对国内某炼油厂3.2 Mt/a蜡油加氢处理装置的长周期运行情况进行评价与分析。简要阐述该装置第一运行周期出现的问题,并提出相应对策。该装置在第一周期运行中催化剂平均失活速率为0.026 C/d,第一床层压降平均上升速率为9.9×10^(-5)MPa/d,第一周期结束时高压换热器垢阻为1.2×10^(-3)m^2·K/W。综合考虑失活模型预测的催化剂寿命、反应器压降上升速率以及高压换热器结垢状况,预测出下一周期该装置的运行时间将可达到1417天。

A 3.2 Mt/a hydrotreating unit after a long running cycle was evaluated. The operation performance of this running cycle was summarized and some suggestions were proposed. During this Ist running cycle, the average deactivation rate of catalyst was 0. 026℃/d, the average rising rate of pres- sure drop in the 1st stage of reactor was 9.9 X 10^-5 MPa/d and the scale resistance in the high pressure heat exchanger reached 1.2〉〈 10^-3 m^2·K/W by the end of this operation cycle. Based on the above data and the predicted values of catalyst service life, the rising rate of pressure drop in reactor, as well as the fouling in high pressure heat exchanger calculated by the modified deactivation model, it can say compre- hensively that the next running cycle could be 1 417 days.