CS-Ⅲ型喷嘴在催化裂化装置的工业应用

Commercial application of CS-Ⅲ atomizing nozzle in FCC unit

介绍了CS-Ⅲ型喷嘴的雾化机理、性能特点以及在中化泉州石化有限公司3. 4 Mt/a催化裂化装置上的工业应用情况。CS-Ⅲ型喷嘴通过对内部结构和外部条件的优化,在改善原料雾化的同时,也强化了提升管内油剂两相的混合。工业应用结果表明:雾化效果较好,产品分布及氢分布更为合理,产品性质略有改善。与原使用BWJ-Ⅳ型喷嘴时相比,在原料性质、催化剂性质和操作参数相近条件下,干气和焦炭收率分别降低0. 15,0. 12百分点;轻油收率降低0. 06百分点;总液体收率增加0. 42百分点;干气中氢气/甲烷的比值降低0. 19单位;液化石油气中异丁烷/异丁烯的比值增加0. 44单位、丙烯体积分数增加0. 80百分点;汽油烯烃含量略有降低,辛烷值略有增加;催化剂单耗降低0. 034 kg/t;装置综合能耗降低1. 35 kg/t(以kg/t表示kg标油/t)。

The atomizing mechanisms and the performance characteristics of CS-Ⅲ type feed nozzle andits commercial application in a 3. 4 MM TPY FCC unit of Sinochem Quanzhou Petrochemical Co.,Ltd. are in-troduced. By optimizing the internal structure and external conditions,the CS-Ⅲ type nozzle not only improvesthe atomization of feed,but also strengthens the mixing of two phases of oil & catalyst in the riser. The com-mercial applications show that the atomization effect is better,the product distribution and hydrogen distribu-tion are more reasonable,and the product properties are slightly improved. As compared with the originalBWJ-Ⅳ type nozzle and under the conditions of similar feed properties,catalyst properties and operating pa-rameters,the dry gas and coke make are reduced by 0. 15 and 0. 12 percentages respectively;the light oilyield is reduced by 0. 06 percentages;the total liquid yields is increased by 0. 42 percent. The hydrogen tomethane ratio in dry gas is reduced by 0. 19 units,the ratio of isobutane to isobutene in the gas is increased by0. 44 units and propylene is increased by 0. 80 percentages. The olefin content is decreased and octane num-ber is elevated slightly for gasoline. Meanwhile,the catalyst consumption is lowered by 0. 034 kg/t and thecomprehensive energy consumption of the unit is reduced by 1. 35 kg/t.