Study On The Factors Of Heavy Oil Thermal Reaction Product Distribution

The thermal reaction product distribution of heavy oil is mainly affected by raw material's properties, reaction temperature and reaction time. A method that mid-reflux oil replaces bottom heavy-cycle oil as coking cycle oil is introducted which can enhance refinery benefit. During the paper typical vacuum residue, the mid-reflux oil and bottom heavy-cycle oil were collected. Analog radiation feed of different recycle ratio were made, and the different raw material's boiling range were measured. The constant temperature experiment, the constant heat experiment, the same reaction process experiment different recycle ratio experiment were developed with the heavy oil thermal process unit. It is the research foundation of the thermal reaction product distribution. At the condition of recycle ratio 0.1, 0.2, 0.3, the product distribution experiment of vacuum residue oil blending with mid-reflux oil and bottom heavy-cycle oil were completed, and the variation law of product distribution was obtained. In addition, a design procedure was get which can transform the product yield.The results show that: At the different experimental conditions, compared to the vacuum residue oil blending with bottom heavy-cycle oil, the mid-reflux oil can get a better product distribution. At the recycle ratio of 0.1,0.2,0.3, the average yield of coke were declined by 2.1%, 5.2%, 7.8%; average yield of liquid were increased by 4.3%, 7.3%, 10.3%; the average yield of gas were decreased by 1%, 2.1%, 2.5%.Experiment studied using the same oil, how was the product distribution affected by the reaction temperature and reaction time simultaneously. The results show that: in the high-temperature section followed by low-temperature section reactions, the high-temperature section has larger effect on product distribution than low-temperature section; the reaction temperature has greater impact than the reaction time. The higher of high-temperature section and longer reaction time, is the best condition for a better product distribution.