Method and system for preparing calcined petroleum coke by kettle type coking process

The invention belongs to the fields of metallurgy, materials and chemical engineering, and relates to a method and a system for preparing calcined petroleum coke by a kettle type coking process. The method for preparing the calcined petroleum coke by the kettle type coking process comprises the following steps: rapidly heating residual oil to 600-800 DEG C, introducing reducing gas to carry out desulfurization reaction, continuously heating to carry out high-temperature reaction after the desulfurization reaction is finished, cooling, and taking out to obtain the calcined petroleum coke and an oil-gas mixture; and fractionating the oil-gas mixture to obtain gasoline, diesel oil and wax oil. The desulfurization reaction and the high-temperature reaction are carried out in the coking reaction kettle by adopting a variable-temperature system, the process flow is simple, and the high-quality calcined petroleum coke with low sulfur content, high particle stability, small coke breeze amount, high true density and h