What is the Thermal Desorption of Oil Sludge?
Integrated with decanter centrifuge, thermal washing, and pyrolysis technologies, the Beston’s Thermal Desorption Unit (TDU) efficiently treats oil-contaminated soil and sludge with complex compositions, converting them into valuable fuel oil. This innovation directly and comprehensively resolves two pervasive industry pain points: low processing efficiency and reactor coking.
5 Advantages of Thermal Desorption + Catalytic
Annual capacity 12,000 tons
High-efficiency harmless treatment
Low operating costs
Resource recovery > 95%
Capable of handling various types of oil sludge
Traditional oil sludge treatment methods
Physical landfill & Incineration
Long treatment cycle
High investment cost
Crude oil is not recyclable
Large carbon emissions, secondary pollution
What Types of Oil Sludge for Thermal Desorption?
Oil sludge is a complex, oily mixture of mud, sand and water produced throughout oil extraction, gathering, transportation and refining, varying in oil, water and solids content by origin.
Tank Bottom Sludge
Refinery Oil Sludge
Landing/Ground Sludge
Drilling Sludge Oil
Oil Based Mud (OBM)
| Source | Type | Water Content % | Oil Content % | Solid Content % |
|---|---|---|---|---|
 Drilling and Oil Extraction (Global share: 40%) | Oil-based Cuttings | 8~15 | 15~25 | 60~80 |
| Waste Oil-based Mud | 40~50 | 10~20 | 30~40 | |
| Oil-contaminated Soil | 5~25 | 5~10 | 70~90 | |
 Oil Gathering&Transportation (Global share: 15%) | Tank Bottom Oil Sludge | 40-70 | 20-40 | 5-40 |
| Oil-contaminated Soil | 5~25 | 5~10 | 70~90 | |
 Oil Refining (Global share: 30%) | Oil-water Separator Sludge | 60~70 | 10~15 | 25~35 |
| Air Flotation Tank Sludge | 75~90 | 5~10 | 3~10 | |
| Activated Oil Sludge | 75~85 | ＜5 | 10~20 |
Turn hazardous oil sludge into recovered oil and compliant, reusable solids. Contact us for a tailored treatment solution.
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Used Motor/Engine Oil
With no solid carrier (such as soil) to bind it, the oil coats the reactor walls, blocking heat transfer and risking damage to the mechanical scrapers.
Water Waste (Pure Liquid Chemicals)
A TDU is designed for solid-liquid separation. Without an adequate solid-to-liquid ratio, processing pure chemicals is energy-inefficient and technically incompatible with the desorption process.
Popular Models of Thermal Desorption Unit
BLL-30 Continuous Thermal Desorption Unit
Runs continuously for 30 daysEasy to obtain environmental compliance and approval
- Input Capacity: 30-35 tons/day oil sludge
- High automation: only two operators required
- Land Space Required (L*W*H*m): 70*20*10
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BLJ-20 Batch Thermal Desorption Unit
Pyrolysis + Distillation Integration technologyExpand 50% Processing Capacity
- Input Capacity: 20-25 tons/day oil sludge
- One step get naphtha & non-standard diesel
- Land Space Required (L*W*H*m): 40*13*8
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BLJ-16 Batch Thermal Desorption Unit
Boost Production Efficiency by 200%
- Input Capacity: 16-18 tons/day oil sludge
- Standard 3 configuration options: BLJ-16 Standard, BLJ-16 TDU, BLJ-16 ULTRA
- Land Space Required (L*W*H*m): 33*13*8
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| Model | BLL-30 | BLJ-20 | BLJ-16 TDU | BLJ-16 Standard | BLJ-16 ULTRA |
|---|---|---|---|---|---|
| Manufacturer | BESTON | BESTON | BESTON | BESTON | BESTON |
| Time to Market | 2025 | 2025 | 2013 | 2013 | 2022 |
| Motor Brand | Chinese brand | Chinese brand | Chinese brand | Chinese brand | ABB Explosion-proof |
| Suitable Raw Materials | Waste plastics; Tires; Oil sludge; | Waste plastics; Tires; Oil sludge; | Oil sludge; Landing oil sludge; Drilling waste; Tank bottom oil sludge; | Whole tire<120cm; Tire blocks<15cm; Oil soil with liquid content<30%; | Waste plastics; Tires; Oil sludge |
| Input Capacity (Max.) | Oil sludge:1.8-2.3t/h | Oil sludge: 20-25t/d | 16-18t/batch | Oil soil: 16-18t/batch | Oil sludge: 16-18t/batch |
| Working Method | Fully Continuous | Batch | Batch | Batch | Batch |
| Final Oil Quality | Pyrolysis oil; Pyrolysis oil with wax or naphtha | Pyrolysis oil; Non-standard diesel and naphtha | Pyrolysis oil | Pyrolysis oil | Pyrolysis oil; Pyrolysis oil with wax or naphtha |
| Reactor Material | 304/310S Stainless steel | Q345R Boiler steel; 304/316L/310S Stainless steel | 304 Stainless steel | Q345R Boiler steel | 304 Stainless steel |
| Reactor Life Span (Years) | 5-8 | Q345R Boiler steel: 2-3; 304/316L Stainless steel: 5-8; 310S Stainless steel: 8-10; | 5-8 | 2-3 | 5-8 |
| Guarantee (Months) | 12 | 12 | 12 | 12 | 12 |
| Delivery Time (Calendar Days) | 60-90 | 60 | 60 | 45 | 90 |
| Land Space Required (L*W*H*m) | 70*20*10 | 40*13*8 | 33*13*8 | 33*13*8 | 33*26*8 |
| Packing | 20*6*3m in bulk+13*40HQ | 1*40FR+4*40HQ | 1*40FR+8*40HQ | 1*40FR+3*40HQ | 1*40FR+8*40HQ |
| Installation Period (Calendar Days) | 60-90 | 45 | 45 | 45 | 60 |
Profitable Value of Final Products
The oil sludge system effectively transforms hazardous oil sludge waste into three high-value, marketable products.
Pyrolysis Fuel Oil
Property: Low sulfur, high calorific value, good fluidity
Applications:
Used in boiler plants, cement factories, and brick kilns.
It is essential in the production of plastics, fibers, and chemicals.
Combustible gas
Property: Non-condensable syngas, high calorific value, clean-burning.
Applications:
Recycled to heat the pyrolysis reactor itself, reducing fuel costs and energy consumption.
Can be used to power burners, boilers, or for drying processes within the plant.
Solid Residue
Property: Carbon-rich solid (similar to carbon black), low oil content, stable and easy to handle.
Applications:
Used as fuel for boilers, cement kilns, and brick factories.
Used as a raw material or additive in construction materials such as bricks and road base.
Additional Commercial Value of Oil Sludge Treatment Solution
Oil sludge treatment is more than just selling recovered oil. Beyond the end products above, the process opens up multiple profit channels — including treatment service fees, by-product utilization, and the value of meeting strict environmental compliance.
High Oil Recovery Rate
Pyrolysis recovers nearly all oil locked in sludge — calculated directly from the raw material’s oil content.
Profitable Pyrolysis Oil Returns
Produced pyrolysis oil is directly sellable as industrial fuel, with market prices varying by region and oil quality.
Oil Sludge Treatment Service Fee
Apart from selling pyrolysis oil, oil sludge treatment projects may also offer another commercial value — oil sludge harmless treatment fees.
BLJ-20 TDU: Engineered for Higher Yield, Bigger Scale, Safer Operation
The BLJ-20 TDU represents Beston’s latest engineering breakthrough in oil sludge pyrolysis. Through three major upgrades — one-step oil refining, 50% greater capacity, and safer sealed operation — it delivers higher product value, stronger project returns, and a safer working environment.
One-Step Oil Refining — Naphtha + Non-standard Diesel
Built-in fractional distillation lets the BLJ-20 pyrolyze and separate oil in a single step — automatically splitting output into naphtha (below 200°C) and non-standard diesel (above 200°C) by temperature.
50% Larger Capacity — ø2800×10000 Reactor
An upgraded ø2800×10000 reactor lifts throughput by 50%, handling up to 7,500 tonnes of oil sludge a year (20-25 t/day).
Safer by Design — Sealed, Flame-Free Operation
Thermal dynamic sealing and flexible high-temperature insulation deliver far tighter sealing than conventional reactors — no oil-gas leaks, no open flames.
Beston Oil Sludge TDU for Advanced Harmless Treatment Solutions
Beston Group’s oil sludge pyrolysis plant has been exported to over 100 countries worldwide. Our extensive export experience has enabled us to fully understand the needs of our global customers. As a result, Beston Group is able to customize oil sludge recycling solutions to meet the specific needs of customers in different regions.
BLJ-16 Oil Sludge harmless project in Oman
Client Background
Major Omani oil company establishing a high-standard Oil Sludge Recycling Center for sustainable resource recovery.
Problems Faced
Compliance pressure to replace traditional, non-compliant disposal methods.
Required high-recovery system; needed expert on-site installation and operation training.
Solutions
Provides two 16 t/D BLJ-16 oil sludge TDU; Beston engineers provided expert on-site installation and operation training.
Results
TDU unit successfully installed and commissioned, achieving high-standard compliant operation.
Hazardous oil sludge successfully converted into marketable fuel oil and energy.
Beston 3 set TDU successfully Installed in Malaysia
Source: Drilling Mud and Cuttings Sludge
Usage of final product: Blended with crude oil for refining & used as fuel in our future T.D.U.
Configuration: Three Batch BLJ-16 TDUs
Why did the customer choose BESTON?
Beston resolved the client’s triple threat of high pollution, high costs, and high compliance risk. The continuous pyrolysis system was chosen for its end-to-end compliance, validated by EU emission standards and Malaysian certification. By achieving 90% volume reduction and 50% lower compliance costs, the project successfully turned toxic sludge into valuable fuel while ensuring 30% energy self-sufficiency.
Beston TDU project operated successfully in Nigeria
Source: Crude Oil Tank Bottom Sludge
Usage of final product: Reused as drilling fluid or base oil in oilfield operations.
Configuration: Two BLJ-16 TDUs
Why did the customer choose BESTON?
The client was under immense pressure to eliminate non-compliant methods and urgently needed high recovery rates and expert training. Beston provided a highly efficient BLJ-16 dual system coupled with comprehensive training to successfully convert hazardous waste into fuel, achieving both compliance and profitability.
In Oman
8-10 TPD of oil sludge waste reliably converted into sellable pyrolysis oil.
In Libya
Successfully operational — oil sludge harmless treatment.
In Nigeria
Safely processing hazardous oil sludge waste into commercial pyrolysis oil.
In Hubei, China
Up to 16 tons of waste oil sludge turned into fuel oil daily,on-site operations.
In South Sudan
Running at 8-10 TPD — local obm reliably converted into usable fuel oil
In Guatemala
Turning 8-10 tons/day oil drilling mud into high-valued pyrolysis oil for sale in Guatemala.
Oil Sludge Harmless Treatment Exchange Conference 2026 in Oman, Middle East
Building on the success of the 2025 Oil Sludge Technology Exchange Conference, the 2nd Middle East Oil Sludge Harmless Treatment Technology Exchange Conference was held on February 11-12, 2026, in Muscat, Oman. The event brought together industry leaders, experts, and partners for technical exchanges, case sharing, and in-depth discussions on the latest trends and solutions. Thank you to all attendees — we look forward to the next gathering!
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Technological Workflow of Thermal Desorption Unit
The Beston Thermal Desorption Process is an highly efficient, harmless and environmentally friendly closed-loop system for oil sludge pyrolysis.
01Pre-treatment and Feeding
Three feeding methods for different oil sludge liquid contents:
Below liquid content 40%: belt conveyor; 40%-60% liquid content: shaftless spiral; More than 75% liquid content: sludge pump.
02Oil Sludge Thermal Desorption
Thermal desorption reaction occurs in a high-temperature micro-aerobic reaction environment. During the reaction, oil sludge undergoes the following changes in thermal desorption equipment:
Under high-temperature conditions, long-chain hydrocarbons in oil sludge are broken into small molecular hydrocarbons. Condensable components in the oil gas can be cooled through the condenser to form fuel oil. Non-condensable oil gas is purified by water sealing to form syngas, which provide energy for the reactor.
03Exhaust Gas Treatment
The high-temperature exhaust gas passes through the flue condenser and spray tower for cooling and dust removal. In addition, we provide high-end exhaust gas treatment systems, including electrostatic dust removal, activated carbon dust removal, and desulfurization and denitrification treatment. The flue gas emitted by high-end exhaust gas treatment can meet EU standards.
04Oil Distillation (Optional)
Fuel oil is converted into higher quality non-standard diesel through oil distillation equipment. With this equipment, fuel oil goes through the following stages:
Distillation: heating the fuel oil and separating components with different boiling points.
Condensation: cooling and liquefying the evaporated components.
Acid & alkali washing: removing acidic and alkaline impurities and improving oil quality.
05Solid Residue Discharge
Some solid substances in oil sludge cannot participate in thermal desorption and eventually form solid residues. The solid residue is discharged through the water-cooled screw conveyor.
Global Oil Sludge Faced Problems & Challenges
Oil sludge (containing poly-cyclic aromatic hydrocarbons and heavy metals) has been recognized as hazardous waste and will pollute soil, air and water sources if improperly disposed of.
Dripping Oil Sludge
Refinery Sludge
Oil-contaminated Soil
Oily Cuttings
Tank Bottom Oil Sludge
Pollution Control is Urgent
As of 2025, the global annual production of oily sludge has exceeded 10 million tons, increasing at an annual growth rate of 7.2%.
Policy Drive
The EU requires that the harmless treatment rate of oil sludge should reach above 95%.
Transformation Opportunities
TDU/Pyrolysis technology is listed as a core process, which has both harmlessness and resource value.
The actual global disposal rate for oil
sludge is merely17.45%
Value of Oil Sludge Harmless Pyrolysis Solution
Improper oil sludge disposal can pollute soil, water, and air. The Beston Oil Sludge pyrolysis system provides a fundamental solution: 100% harmless treatment and maximum resource recovery.
Eliminates soil toxicity
Oil Sludge pyrolysis technology ensures extremely low residual hydrocarbons in the solid product, reversing soil degradation and ecological damage.
Protecting water resources
Advanced closed-loop systems and pretreatment technologies prevent the penetration of oil and heavy metals, protecting aquatic ecosystems.
Ensuring clean air
Oil sludge is treated in a closed environment, and multi-stage exhaust gas purification removes VOCs and sulfur compounds, ensuring fresh air.
Improve economic efficiency
It can be converted into reusable resources, which can be used to replace traditional energy sources, reduce energy procurement costs, and improve economic efficiency.
EPC Turnkey Service for Pyrolysis Projects
From Blueprint to Operation: Your EPC Partner for Industrial Parks BESTON delivers end-to-end Engineering, Procurement, and Construction(EPC) solutions for oil sludge harmless disposal, plastics and tyres environmental treatment.
Co-Development & Partnerships
Establishing strategic alliances and co-development partnerships with world-leading industry giants, such as Huawei and LONGi Green Energy, to accelerate innovation in sustainable solutions.
Integrated Solution
Based on feedstock characteristics and local conditions, we design a complete pyrolysis solution — from process flow, layout planning, to emission control.
Integrated Supply Chain
BESTON applies BIM technology in comprehensive one-stop service, from rigorous manufacturing to ongoing after-sales support, ensuring stable equipment operation and smooth project delivery.
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