Method and system for producing at least one oil product from waste oil

A waste oil converting system for converting waste oil into one or more oil products, said waste oil converting system comprising:

• at least one receiving tank into which the waste oil is received;
• an oil treatment part comprising an inlet fluidly connected to an outlet of the at least one receiving tank such that the waste oil can be transferred from the at least one receiving tank to the oil treatment part, said oil treatment part comprising at least one subsystem selected from the group consisting of:
• a decanter, a high speed centrifuge, a chemical addition subsystem, a mixer, a filter, a settling tank, a water injection nozzle and a heater, the at least one subsystem being configured to decrease a water content, a sludge content and/or a particle content of the waste oil;
• at least one sensing position in the waste oil converting system configured to measure at least one property of the waste oil before and/or during and/or after a treatment by the oil treatment part, wherein said at least one sensing position comprises at least one local sensor or is connected to an external analysis equipment comprising at least one external sensor connected to external analysis equipment to which a sample of the waste oil can be forwarded for analysis from the at least one sensing position, wherein said at least one property is density, viscosity, amount of water, amount of ash, amount of particles, and flash-point;
• at least two storages fluidly connected to an outlet of the oil treatment part via a respective storage valve such that an outlet flow of the waste oil from the oil treatment part can be directed to any one of the at least two storages by control of the storage valves;
• a control system operably connected to the at least one sensor, the oil treatment part and the at least two storage valves,
• wherein said control system is configured to adjust one or more settings of the at least one oil treatment subsystem based on at least one measured value of said at least one property, and
• wherein said control system is configured to control the at least two storage valves to control which one of the at least two storages receives the oil from the oil treatment part based on the at least one measured value of the at least one property, and
• wherein each of the storages is assigned a predefined value range for at least one of the at least one property.