减压渣油固定床加氢与缓和催化裂化组合工艺研究

Study on integrated process of vacuum residue fixed-bed hydrotreating and highly selective catalytic cracking

利用减压渣油和未转化催化裂化蜡油(FGO)的混合原料,在液时体积空速0.20 h-1、反应器入口氢分压16.5 MPa、氢油比700的工艺条件下,开展了固定床渣油加氢试验。加氢常压渣油主要性质满足缓和催化裂化原料要求,利用加氢常压渣油开展了缓和催化裂化试验。通过渣油加氢与缓和催化裂化工艺组合,使固定床渣油加氢可以加工100%减压渣油。以减压渣油进料计,多产FGO、兼顾FGO和汽油、多产汽油3种方案的汽油+柴油质量收率分别为67.77%,66.38%,61.99%,高附加值的液化石油气质量收率分别为15.69%,16.76%,19.22%,可以实现利用减压渣油最大量生产轻质产品的目的。

Using the mixed feedstock of vacuum residue and FGO, a fixed-bed residue hydrotreating test was carried out under the process conditions of liquid hourly space velocity of 0.20 h-1, hydrogen partial pressure at reactor inlet of 16.5 MPa, and hydrogen-to-oil ratio of 700. The main properties of the hydrogenated atmospheric residue met the requirements of highly selective catalytic cracking(HSCC) feedstock. The HSCC test was carried out with the hydrogenated atmospheric residue. Through the combination of residue hydrotreating and HSCC process, the fixed-bed residue hydrotreating could process 100% vacuum residue. Calculated by vacuum residue feedstock, in three experimental schemes, which were maximum FGO, balanced FGO and gasoline, and maximum gasoline, the yield of gasoline and diesel was 67.77%, 66.38% and 61.99% respectively, and the yield of LPG was 15.69%, 16.76% and 19.22% respectively. The purpose of producing maximum light products with vacuum residue could be realized.