MIP技术在提高液体产品收率上的先进性分析

对具有代表性的工业MIP装置与FDFCC装置、FCC装置和TSRFCC装置的液体产品收率进行对比分析。结果表明:无论是以加氢重油还是以加氢蜡油或者常压渣油为原料,采用MIP工艺时,汽油与液化气产率均较高,而干气与油浆产率较低,液体产品收率较高;与其它同类技术相比,其液体产品收率最少提高2百分点;且MIP技术的汽柴比高,所生产汽油硫含量低、烯烃含量较低而辛烷值与其它技术相当或较高。这主要是由于MIP技术采用具有独特的双反应区的提升管反应器,并在不同反应区内设计了与烃类反应相适应的工艺条件,可强化重油转化能力,减少干气和焦炭产率,从而提高总液体产品收率。

ADVANTAGE OF MIP SERIES TECHNOLOGIES IN IMPROVING TOTAL LIQUID YIELD

Data of liquid yield from representative running MIP unit was analyzed and compared with FDFCC, FCC and TSRFCC processes. The statistical data show that MIP technologies have higher total liquid yields with higher gasoline and liquefied petroleum gas (LPG) yields, lower dry gas and slurry yields in processing hydrotreated heavy oil, hydrotreated gas oil and atmospheric residue. Relative to other technologies, the liquid yield of MIP is 2 percent higher at least with higher ratio of gasoline to diesel oil of MIP process. The MIP gasoline is lower in olefin and sulfur content and higher or equivalent octane number to other process. That can mainly attribute to the unique two reaction zones in one riser reactor, each having suitable reaction condition for the different reaction of hydrocarbons. The suitable reaction condition in each zone intensifies the heavy oil conversion and decreases dry gas and coke yields so that total liquid yield is increased.