• Pyrolysis Equipment for Oil Sludge
  • Pyrolysis Equipment for Oil Sludge
  • Pyrolysis Equipment for Oil Sludge
  • Pyrolysis Equipment for Oil Sludge

Pyrolysis Equipment for Oil Sludge

The equipment is applicable to the harmless and reduced recycling of various oil sludge (hw08), such as oily contaminated waste, ground sludge, refinery sludge, tank bottom sludge, drilling debris, ground oil spill, etc. The oxygen-free pyrolysis technology is used to indirectly heat the oil sludge. In the anaerobic state, the carbon chain in the oil sludge breaks and decomposes into small molecules of hydrocarbons, carbon, hydrogen and oxygen, and finally generates pyrolytic gas and pyrolytic carbon. The non-condensable gas in the pyrolytic gas flows into the combustion chamber for combustion and heating after purification, pressure stabilization and other processes, and the condensable gas forms pyrolytic tar. On the premise of safety, environmental protection and stable operation, the oil sludge is finally transformed into pyrolytic tar, pyrolytic carbon and other main products through anaerobic pyrolysis technology and equipment, so as to realize the harmless and reduced recycling of oil sludge.

  • Pyrolysis Equipment for Oil Sludge
  • Pyrolysis Equipment for Oil Sludge
  Source Category Water% Oil% 
Drilling Oil base drillings  8-15  15-25 
Working sludge 40-50  10-20
Landing sludge  5-25 5-10 
Crude oil gathering and transporting  Landing sludge  5-25 5-10 
Tank bottom sludge 40-70 20-40 
Refining Three Mud Sediment 60-70  10-15
Scum  75-90  5-10
Activated sludge 75-85  <5 

At present, there are more than ten kinds of treatment technologies of sewage sludge in the world, such as landfill, profile control and stratum injection, solidification treatment, thermal desorption, solvent extraction, incineration and coking, biological treatment, and comprehensive utilization.
  • Take up large area
  • High operating cost 
  • Limited capacity
  • Low operating efficiency 
  • Large comsumption of fuel 
  • Serious secondary pollution 

Technology Advantage  Disadvantage  Process Characteristics
Chemical Conditioning- Mechanical Seperation  Suitable for various types of sludge, most of the oil can be recovered  In order to meet the standards, deep processing is required.  Simple and mature 
Biological Treatment  Low energy consumption and processing cost  It is difficult to screen, culture and acclimate microorganisms, which requires high oil content of sludge and long treatment period  Complex but mature 
Solidification  It is convenient for stacking, storage, and subsequent processing.  Can not completely eliminate the pollution, may leak and pollute groundwater  Simple and mature 
Incineration  The treatment is thorough, the capacity reduction effect is obvious, and the heat energy is recovered  High energy consumption and difficulty in long-term stable operation.  Complex but mature
Pyrolysis More thorough reduction in volume, able to recover part of the crude oil.  High energy consumption and difficulty in long-term stable operation.  Basically mature 
Solvent Extraction  High oil recovery rate.  The extraction agent is lost and the processing cost is high  Immature
Chemical Cleaning  The process is simple and easy to implement  The cost is high and the consumption of chemical reagents is large  Mature 
Sludge conditioning  Achieve zero emissions, no secondary pollution The potential hazards are unknown and the compatibility requirements are high  Mature
Electrochemical Treatment  High energy consumption, less investment, no secondary pollution  The processing cycle is long, the crude oil is completely lost, and the area is large  Complex but immature 
Supercritical Water Oxidation  The heat energy can be recycled and the pollutants can be completely degraded.  The cost is high and the harm of heavy metals cannot be eliminated  Complex but immature 

Technology Advantage 
  1. By adopting a combined process, a wide range of oily sludge can be treated, including liquid, semi-solid, and solid oil-containing sludge, as well as oilfield packaging and oil-absorbing felt. This method is more comprehensive compared to other technological processes. 
  2.  By adopting a combined process, it is possible to selectively choose the appropriate method based on the properties of oily sludge from different sources. This approach reduces the overall operating costs and ensures more reliable operation of the equipment. 
  3.  By adopting a combined process, the energy consumption is reduced by 40% compared with other pyrolysis technologies for treating semi-solid oily sludge, resulting in a significant improvement in overall treatment efficiency. 
  4.  The core equipment (drying equipment and pyrolysis carbonization equipment) adopts a skid-mounted design, allowing for flexible on-site treatment of oil-containing drill cuttings and contaminated soil. 
  5.   After treatment by the pyrolysis carbonization equipment, the oil content in the solid phase can be reduced to as low as 1%, truly achieving harmless treatment. 

Carbon Emission Reduction 

The amount of flue gas emitted by oxygen-free pyrolysis is only about 1/10 of that of incineration. The pyrolytic gas used for heating the pyrolysis furnace is purified, the harmful factors (smoke, SO2, NO, heavy metals, etc.) emitted of which is almost negligible. Energy Conservation 

The pyrolysis temperature is much lower than the incineration temperature. The heat loss of the flue gas from the hot air furnace after multi-gradient utilization is extremely low. The energy consumption of pyrolysis is about 15% of that of incineration. 
Carbon Fixation 
Biomass is carbonized and stored in soil by oxygen-free pyrolysis, which can solve the problem of straw burning and greatly increase the ability of soil carbon retention and fertilizer preservation. 
Inhibit Dioxins and Heavy Metals 
Solid waste pyrolysis inhibits the synthesis of dioxins due to the oxygen-free environment. heavy metals in the reducing environment transform from exchangeable state to stable forms such as residues, and are almost entirely solidified in the carbon residue. 
Flexible Multi-use with High Yield 
The pyrolysis furnace is more suitable for small and medium-scale applications, making project site selection and implementation easier. It also facilitates the non-destructive recovery of metal materials such as copper, aluminum, and iron.  

Vary Pyrolysis Process
The oil sludge is heated indirectly in an air-isolated pyrolysis furnace and the decomposition reaction takes place at a controlled temperature of 450-500℃ and organic pyrolytic gas and pyrolytic carbon will be generated.      
After the organic pyrolytic gas is discharged from the pyrolysis furnace, the pyrolytic liquid is obtained by two-stage condensation and then processed into fuel oil. The non-condensing gas enters the combustion chamber for heating, and the tail gas is treated to the standard and then discharged.      
After the above process, the oily sludge is converted into two products that can be reused: fuel oil and carbon black. 

Item  Details 
Input Raw Material  Landing sludge, refinery sludge, tank bottom sludge, surface oil spill, drilling cuttings, waste oil-based mud, tank cleaning sludge, oil pit sludge and other oily sludge (HW08) 
Final Product  Pyrolytic tar: 1. Used as raw material oil for refinery; 2, directly as fuel oil. Pyrolytic carbon: carbon processing raw material Non-condensing combustible gas (reused in the system) Due to the complex types of raw materials and variable composition, it is recommended that customers provide industrial analysis of raw materials to determine the final product yield. 
Capacity  40~140T/D 
Operating Model  Continuous Model (feed, discharge, operation); Batch Model 
Heating Mathod  Indirect heating, adjustable constant temperature heating 
Energy  Non-condensing gas, natural gas 
Main furnace material  Stainless steel inner cylinder  
Operating Pressure  ±500Pa 
Pyrolysis Temperature  300~600℃ 
Automation  PLC/DCS Control, fully automatic intelligent control, low labor intensity 
Oil Content in Carbon  <0.3%, the process can be optimized according to local standards to reach specified limits 
Environmental Protection  All emissions are in line with the most stringent local emission index requirements 
In various stages of petroleum Industry such as exploration, exploitation, production, transportation, storage, and refining, a large amount of oil sludge is generated every year. The oil content in the oily sludge can reach 5% to 50%, containing pollutants such as polycyclic aromatic hydrocarbons and heavy metals which make the oil sludge be toxic, flammable, and easy to cause air, soil, and water pollution. It causes serious harm to ecological environment and human health. However, oily sludge comes from diverse souces with complex composition, which brings great difficulties to disposal.