Integrated method and apparatus for catalytic cracking of heavy oil and production of syngas

An integrated method for catalytic cracking of heavy oil and production of syngas, wherein a cracking-gasification coupled reactor having a cracking section and a gasification section that are internally connected with each other is used as a reactor, the integrated method comprises:

• feeding a heavy oil feedstock into the cracking section in an upper portion of the cracking-gasification coupled reactor to contact with a bed material in a fluidized state that contains a cracking catalyst, a catalytic cracking reaction is conducted under atmospheric pressure to obtain light oil-gas and coke;
• the coke is carried downward by the bed material into the gasification section in a lower portion of the cracking-gasification coupled reactor to conduct a gasification reaction to generate syngas;
• the syngas goes upward in the cracking-gasification 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 separation system;
• subjecting the light oil-gas and the syngas in the gas-solid separation system to at least a first-stage gas-solid separation, and bed material particles separated out are collected and divided into two parts, and returned to the cracking section and the gasification section, respectively, to form a first-stage circulation and a second-stage circulation of the bed material particles accordingly;
• and
• performing oil-gas fractionation to a purified oil-gas product output from the gas-solid separation system to collect light oil and syngas products;
• wherein, the integrated method, before the coke is carried by the bed material downward into the gasification section in a lower portion of the cracking-gasification coupled reactor, further comprises performing a steam stripping processing and a particle size refining processing sequentially to the downward bed material particles.