“微爆”理论在重油催化裂化进料雾化中的应用

APPLICATION OF "DEMOLITION ATOMIZATION" THEORY IN ATOMIZATION OF FEEDSTOCK FOR RFCCU

应用重油乳化燃烧中的“微爆”理论 ,采用复合非离子表面活性剂将重油催化裂化原料进行乳化 ,水以 1～ 5 μm的液滴均匀地分散在油中 ,形成稳定的油包水型乳化液 ;乳化原料同高温再生催化剂接触发生爆破雾化 ,改变了雾化方式 ,使原料液滴粒径减小至 5 μm左右 ,提高催化裂化反应效果 ,可改善焦炭选择性 ,提高轻质油收率。催化裂化中试工艺实验结果表明 :在相同的操作条件下 ,与未乳化原料比较 ,轻质油收率提高 3.6～ 8.2个百分点 ,干气产率降低 0 .3～ 0 .8个百分点 ,焦炭产率降低 0 .6～ 1.3个百分点 ;汽油和柴油的产品质量基本不变。

Based on the 'demolition atomization' theory for emulsified heavy oil combustion,the feedstock for heavy oil catalytic cracking was emulsified and formed into a stable water in oil emulsion by compound non ion surfactant.The water was dispersed uniformly in oil with drops about 5 μm.After being in contact with high temperature regenerated catalyst,the emulsified feedstock was atomized demolishedly,which changed atomization mode and reduced the diameters of the liquid drops to about 5 μm. Pilot test showed that,compared to unemulsified feedstocks,the yield of light oil enhanced by 3.6%～8.2% and the yields of dry gas and coke decreased by 0.3%～0.8% and 0.6%～1.3%,respectively.The product qualities of diesel and gasoline remained unchanged.