公开(公告)号：US06110356A

公开(公告)日：2000-08-29

申请号：US73482

申请日：1998-05-06

申请人： Brian W. Hedrick ,  Mark Schnaith ,  Lawrence A Lacijan

发明人： Brian W. Hedrick ,  Mark Schnaith ,  Lawrence A Lacijan

IPC分类号： C10G11/18 ,  C10G11/00

CPC分类号： C10G11/18

摘要： The invention improves a system and apparatus for the recovery of fine solid particles entering the slurry system of a fluidized catalytic contacting process by returning a portion of the recovered solids from the main separator directly back to the reactor stripper. The invention recovers fine particulate material from an FCC main column and returns the particulate material to an FCC stripper to reduce the amount of fine material that continues to recycle through the FCC reactor and product separator. By returning fine particulate material from the FCC product separation zone directly to a low velocity area of the stripping section, the invention breaks the reactor--main column recycle loop that concentrates the fines. Fines entering the reactor stripper will not be carried back into the cyclones for unwanted return to the main column. By the recycling of fines to the stripper via this invention, the fines concentration in the slurry system can decrease by up to 300%.

摘要翻译： 本发明通过将一部分回收的固体从主分离器返回到反应器汽提器来改进用于回收进入流化催化剂接触方法的浆料体系的细固体颗粒的系统和装置。 本发明从FCC主色谱柱回收细颗粒物质，并将颗粒物质返回到FCC汽提器中，以减少继续通过FCC反应器和产物分离器再循环的细料的量。 通过将FCC产物分离区的细颗粒物质直接返回到汽提段的低速区域，本发明打破了浓缩细粒的反应器 - 主塔循环回路。 进入反应器汽提器的细粉不会被带回到旋风分离器中，以便不必要地返回到主色谱柱。 通过本发明将细粒再循环到汽提塔中，浆料系统中的细粉浓度可以降低高达300％。