PURPOSE: To utilize effectively heat energy which unvaporized cracked oil retains, by cooling a mixture of a hydrocarbon solvent and unvaporized cracked oil obtd. by thermally cracking heavy oil and separating solids.
CONSTITUTION: Heavy oil heated in a heating oven 2 is introduced into a reactor 4 equipped with a stirrer, thermally cracked at 350W550°C under a pressure of 0W10kg/cm2G for 0.5W5hr and separated into a vaporized component and an unvaporized cracked oil. The cracked oil is fed through a pipe 17 and a pump 18 to a pipe 19A and mixed with a hydrocarbon solvent having a b.p. of 50W 250°C fed from a pipe 16, at 180W300°C under a pressure of 5W35kg/cm2G. The pressure is intermittently reduced by means of a reducing valve 51A and the mixture is introduced into a gas-liquid separator 52A where the mixture is separated into solvent vapor and unvaporized oil mixture. The oil mixture is introduced through a reducing valve 51B into a gas-liquid separator 52B where gas and liquid are separated from each other. The resulting unvaporized oil mixture is fed through a reducing valve 51C to a cooler 20 to cool it and then fed to a centrifugal separator 22 to separate solids.
YANAGISAWA YUZURU
FUKUYAMA HIDEJI
OOTSUKA KOUJI
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