问题导向法研究提升连续重整催化剂质量

Study on Improving the Quality of Continuous Reforming Catalysts through Problem-oriented Method

为适应越来越苛刻的用户需求,必须提高连续重整催化剂的产品质量,解决连续重整催化剂生产技术“瓶颈”。连续重整催化剂在生产过程中由于设备结构、工艺参数控制、操作方式等原因,总会有约0.3%的连续重整催化剂成品性能评价相对较低,其直观表现就是经实验室水热老化处理后出现“灰球”。通过问题导向法从多种影响因素中排除干扰,确定影响重整催化剂质量的主要因素并探究“灰球”产生机理,发现水氯活化是产生“灰球”的主要工序。通过对立式活化炉进行改造,完善投出料工艺条件,消除出料过程中短暂的“焖炉”贫氧状况,解决了催化剂在水氯活化工序中因Pt聚集产生“灰球”的问题,催化剂性能也得以提升。经过技术改进,催化剂“灰球”产生量由0.3%降至0,催化剂产品微反活性提高了0.5%,起到提升催化剂质量的作用。

In order to meet the increasingly demanding user requirements, it is necessary to improve the product quality of continuous reforming catalysts and solve the bottleneck in production technologies for con-tinuous reforming catalysts.During the production of continuous reforming catalyst,about 0.3% of the finished continuous reforming catalysts have relatively low performance due to equipment structure,process parameter control and operating mode,as evidenced by the appearance of grey sphere after hydrothermal aging treatment in the laboratory.The main factors affecting the quality of reforming catalysts were determined by eliminating the interference from various influencing factors through problem-oriented method,and the generation mechanism of grey sphere was explored.It was found that water chlorine activation was the main process for grey sphere generation.By revamping the vertical activation furnace,perfecting the process conditions for feeding and discharging and eliminating the transient oxygen deficiency during discharging,the grey sphere problem of catalysts caused by Pt aggregation in water chlorine activation process was solved and the performance of catalysts was improved.After technical improvement,the output of grey sphere decreased from 0.3% to 0,and the micro activity of catalyst products increased by 0.5%,thus improving the quality of catalysts.