TCDTO-1脱烯烃精制剂在0.6Mt/a对二甲苯装置的应用

Application of TCDTO-1 olefins removal refining agent in 0.6 Mt/a para-xylene unit

中国石化海南炼油化工有限公司0.6 Mt/a对二甲苯联合装置开车初期,重整生成油脱烯烃采用白土,1 t白土处理原料油仅为234 t,预计年消耗白土高达3 077 t,白土更换频繁、产生的固体废物数量大、工人劳动强度高。与白土相比,TCDTO-1精制剂具有单程寿命长、脱烯率高及可反复再生且环保的特点,因此采用该精制剂替代活性白土。首次单塔试用,单程寿命为103 d,1 t精制剂单程累计处理原料3 420 t,约为白土的14.6倍。针对运行中后期精制剂失活速率快的问题分析认为,原因在于重整生成油胶质和非芳含量高。结合精制剂和装置本身特点,提出采用"失活精制剂+新鲜精制剂"的两塔串联操作模式,进行整改后运行效果良好。

During the initial period of the startup of 0.6 Mt/a para-xylene combination unit in SINOPEC Hainan Refining ＆ Chemical Co., Ltd, reforming devices adopted clay to remove olefins in reforming generation oil.The treatment of raw oil was only 234 t per 1 t clay.The estimate of annual clay consumption was up to 3 077 t.Frequent renewal of clay produced a solid waste in large quantities and high labor intensity of workers. TCDTO-1 refining agent, compared with clay, had the character- istics of long single cycle life ,high rate of olefins removal ,repeated regeneration, and environmental protection.Therefore, the refining agent was used to replace activated clay.On the first trial in a single-tower,the single cycle life was 103 d.The treatment of raw of single cycle added up to 3 420 t per 1 t refining agent, about 14.6 times more than clay.Based on the prob- lem that the deactivated rate of refining agent was fast in the middle and later periods of running, the research analyzed that colloid and non aromatic content were high in reforming generation oil.Combined with the features of refining agent and de- vice itself, it was pointed out the operational mode of twin towers in series, using＇ deactivated refining agent＋fresh refining agent＇ mode.The devices operated well after improved.