Oily sludge (HW08 hazardous waste) is a typical pollutant generated in oil and gas exploitation and petrochemical refining industries.

Traditional disposal methods feature high operational costs, severe resource waste and increasing environmental supervision pressure.

The oily sludge pyrolysis for resource utilization technology adopts the principle of oxygen-free and medium-temperature pyrolysis. Organic hydrocarbons in oily sludge are cracked under fully closed and anaerobic conditions:

1) Liquid components are condensed and recovered as recycled fuel oil, realizing the recycling of petroleum resources;

2) Non-condensable combustible pyrolysis gas is recycled to the system as heat source, achieving self-sustaining energy circulation;

3) Solid residues are stabilized with heavy metal immobilization, fully complying with environmental standards and available for further comprehensive utilization.

The complete process is equipped with multi-stage flue gas purification, which significantly reduces dioxin formation risks compared with incineration technology. The system is adaptable to multiple feedstocks, including pit oily sludge, tank cleaning sludge and oil-based drill cuttings.

Balancing environmental compliance, hazardous waste volume reduction and resource economic benefits, the technology provides oil and gas enterprises with a sustainable solid waste recycling solution and supports the construction of zero-waste factories and green oilfields.