氯吸附技术在1.0Mt/a连续重整装置上的应用及其改造

中国石化天津分公司新建1.0Mt/a连续重整装置采用国外第三代超低压连续重整工艺成套专利技术,配置了ChlorsorbTM氯吸附系统,催化剂采用中国石化石油化工科学研究院(石科院)开发的PS-Ⅵ,PS-Ⅵ催化剂具有良好的氯吸附能力,可以使再生放空尾气脱氯率大于98%,满足氯吸附技术的要求。然而由于氯吸附技术使再生循环气中水含量大幅度增加,加快了催化剂比表面积的下降速率,使催化剂寿命缩短,设备腐蚀严重。采用石科院开发的固体脱氯技术和GL-1再生烟气脱氯剂进行技术改造后,再生放空尾气中氯质量分数降低到2μg/g以下,PS-Ⅵ催化剂的比表面积下降趋势明显减缓,大大延长了PS-Ⅵ催化剂的使用寿命。

APPLICATION AND TRANSFORMATION OF CHLORSORB TECHNOLOGY IN 1.0MT/A CCR UNIT

The 3rd generation ultra-low pressure continous catalytic reforming technology introduced from abroad with a ChlorsorbTM system is adopted in the newly built unit in Tianjin branch, SINOPEC using the PS-VI catalyst developed by RIPP. The PS-VI catalyst has a good chlorine adsorptive capacity, by which the dechlorination rate of the regeneration flue gas is up to 98%, meeting the request of the chlorine adsorption technology. However, the chlorine adsorption technology makes the water content increases largely in the regeneration circulating gas. This speeds up the reduction of catalyst specific surface, and causes the catalyst lifetime shortened and corrosion of the equipment seriously. After the technical transformation by using the solid dechlorination technology and GL-1 regeneration flue gas dechlorination agent, both developed by RIPP, the chlorine mass fraction of regeneration flue gas is reduced to less than 2μg/g. The decline trend of the specific surface area of PS-VI is returned to normal. The PS-VI catalyst lifetime is extended greatly.