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    • 4. 发明申请
    • Process for cracking asphaltene-containing feedstock employing dilution steam and water injection
    • 使用稀释蒸汽和水注入裂解含沥青质的原料的方法
    • US20080149532A1
    • 2008-06-26
    • US11821603
    • 2007-06-25
    • Richard C. StellJames N. McCoy
    • Richard C. StellJames N. McCoy
    • C10G9/14
    • C10G9/16C10G9/20C10G9/36
    • A process for reducing the rate of increase in pressure drop across a furnace convection section, the furnace convection section having a temperature profile. The process includes the steps of establishing a ratio of total dilution H2O to feedstock for the system, injecting a first portion of the total dilution H2O in the form of water into the convection section of the furnace, injecting a second portion of the dilution H2O in the form of steam into the convection section of the furnace, wherein a ratio of dilution H2O in the form of water to dilution H2O in the form of steam is established and varying the temperature profile across the convection section of the furnace by adjusting periodically the ratio of dilution H2O in the form of water to dilution H2O in the form of steam. A similar technique is conducted during decoking to remove asphaltene coke starting from the lower convection section upward. This upward decoking is accomplished by initially using more H2O in the form of water, then as the decoke proceeds reducing H2O in the form of water while increasing H2O in the form of steam.
    • 一种用于降低炉对流部分上的压降增加速率的方法,炉对流部分具有温度分布。 该方法包括建立总稀释H 2 O 2与系统原料的比例的步骤,将总稀释H 2 O 2的第一部分以 水进入炉的对流段,将蒸汽形式的稀释H 2 O 2的第二部分注入炉的对流段,其中稀释H 2的比例< 建立水蒸汽形式的稀释H 2 O 2 / O 2 O,并且通过周期性地调节稀释H 2 O以水的形式稀释成蒸气形式的H 2 O 2。 在脱焦过程中进行类似的技术以从下部对流部分向上开始除去沥青质焦炭。 该向上除焦是通过最初以水的形式使用更多的H 2 O 2来完成的,然后当该转化进行时以水的形式还原H 2 O 2同时增加H 2 O 2, SUB> 2 O以蒸汽的形式。