Method and apparatus for integrating pressurized hydrocracking of heavy oil and coke gasification

A method for integrating pressurized hydrocracking of heavy oil and coke gasification, wherein a coupled reactor having a cracking section and a gasification section that are internally connected with each other is used as a reactor, the method comprises the following steps:

• feeding a heavy oil feedstock and a hydrogenation catalyst into the cracking section in an upper portion of the coupled reactor, and in the presence of hydrogen, the heavy oil feedstock is contacted with a coke powder in a fluidized state to carry out a pressurized catalytic cracking reaction under catalysis of the hydrogenation catalyst to generate light oil-gas and coke;
• carrying the coke downward by the coke powder into the gasification section in a lower portion of the coupled reactor, and carrying out a gasification reaction with a gasification agent to generate syngas and regenerate the coke powder;
• wherein obtained regenerated coke powder is returned to the cracking section;
• the syngas goes upward in the coupled reactor into the cracking section to merge with the light oil-gas, and is guided out from the coupled reactor to a gas-solid separator;
• subjecting the light oil-gas and the syngas in the gas-solid separator to a first-stage gas-solid separation and a second-stage gas-solid separation sequentially, first-stage solid particles and second-stage particles are separated out in sequence, and a purified oil-gas product is collected, and the first-stage solid particles are returned to the cracking section to form a first-stage circulation;
• and the second-stage solid particles are returned to the gasification section to carry out a gasification reaction and form a second-stage circulation;
• and
• performing oil-gas fractionation to the purified oil-gas product, and a light oil product and a syngas product are collected.