As the challenge of recycling oily hazardous waste grows, thermal desorption unit (TDU) offers a sustainable solution. Through a controlled heating process, this unit effectively breaks down oily waste to valuable resources such as fuel oil and syngas. Overall, thermal desorption system meets the urgent need for effective waste management while supporting the sustainable development of oily waste management industry.
In-Depth Analysis of Thermal Desorption Technology
The working logic of thermal desorption unit is similar to pyrolysis unit. It uses high temperature to increase volatility and thermal decomposition properties of pollutants, thereby removing them from solid matrices. Oily wastes contain petroleum components and volatile organic compounds (VOCs), which cause many hazards when treated irrationally. These hydrocarbon mixtures are more easily thermally decomposed from solid matrices under high temperature conditions. Therefore, this technology is an excellent choice for recycling oily wastes.
Comprehensive Overview of Thermal Desorption Unit
TDU unit is an integrated equipment for the treatment of oily waste. The unit includes several key components: reactor, condensation system, solid discharge system and dust removal system. Similar to the oil sludge pyrolysis plant, it is designed to separate volatile hydrocarbons from oily waste in a high temperature and micro-oxygen environment. As a result, efficient thermal desorption process converts the waste into fuel oil, syngas and solid residue. In addition, specialized waste gas treatment facilities enable it to meet emission standards.
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Thermal Desorption Unit for Sale in Different Operating Designs
Batch TDU
- Model: BLJ-16;
- Capacity: 16T/d;
- One furnace per day;
| Model | BLJ-16 | BLL-30 | |
| Capacity | 12-16t/d | 30-35t/d | |
| Working Process | Batch | Fully continuous | |
| Reactor Size | φ2800*7100mm | φ1800*18500mm | |
| Reactor Material | Q345R | 310S stainless steel | |
| Drive System | 500 reducer+7.5kw drive motor | ZQH650-50 reducer+15kw frequency conversion motor | |
| Land (L*W*H) | 33m*13m*8m | 70m*20m*10m | |
| Power | 55.6kw | 256kw | |
| Burner | 2*400,000 kcal | 2.5 million kcal per set | |
| Total Weight of Shipped Materials | About 34.5t | About 150t | |
| Number of Containers | 1*40FR+2*40HQ | 25m*8m bulk cargo+8*40HQ | |
| Noise (dB) | ≤60 | ≤60 | |
| Heating Materials | Fuel oil (including tyre/plastic pyrolysis oil), natural gas, LPG, diesel, etc. | ||
| Condensing System | Vertical Condenser | φ820*3600 Single piece condensing area 35.6m2 | φ920*3200 2 sets of vertical condenser |
| 3-in-1 Condenser | 8000*2260*2500 Condensing area 49.5m2 |
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Working Process of Thermal Desorption Unit: Step-by-Step Guide
The following takes thermal desorption equipment in continuous operation mode as an example to show the operation process. You can also visit our YouTube to browse more video resources.
Oily Waste Feeding
First, the oily hazardous waste is transported to the main furnace. Different liquid contents have different transportation methods:
- Liquid content below 40%: belt conveyor;
- Liquid content 40%-60%: shaftless screw;
- Liquid content above 75%: sludge pump.
01
Thermal Desorption Process
- As the temperature of pyrolysis reactor gradually increases, the long-chain petroleum hydrocarbon compounds in the oily waste begin to thermally decompose.
- In a high-temperature, micro-oxygen environment, the small-molecule hydrocarbon compounds formed by the reaction are gasified.
- Thermal desorption unit removes volatile components that pose a threat to the environment. The oily sludge forms harmless solid residues.
02
Fuel Oil & Syngas Separation
- Oil gas enters the header to separate heavy oil impurities.
- The condensable components in the oil gas enter the condenser to form fuel oil, which is stored in the oil tank.
- Water seal purifies the non-condensable components in the high-temperature oil and gas to form syngas, which contains CO, H₂.
- Syngas enters the combustion system. It replaces fossil fuels to provide heat for the reaction.
03
Solid Residue Discharge
- After the oily hazardous waste in the reactor is fully reacted, the screw conveyor discharges the solid residue.
- Solid residue enters the water-cooled screw discharger from the screw conveyor.
- Cooling water in the discharger exchanges heat with the high-temperature solid residue to cool it down.
- Solid residue treated by the three water-cooled screw discharger is cooled to 50-80℃.
04
Waste Gas Treatment
Since oily waste is mostly hazardous waste, its emission standards are relatively strict. Customers who choose TDU unit often choose to adopt a high-end exhaust gas treatment system.
- First, heat exchangers cool down the high-temperature waste gas.
- Then, cooled waste gas enters the chemical tower for desulfurization and denitrification.
- Treated waste gas enters the electrostatic precipitator and activated carbon dust collector for dust removal.
- Finally, chimney discharges the purified exhaust gas.
05
Thermal Desorption System Achieves Three-Phase Resource Recovery
Thermal desorption unit has the ability to convert waste into liquid phase (fuel oil), solid phase (harmless residue) and gas phase (sygas). They all have a systematic formation process and excellent utilization value.
Liquid: Fuel Oil
- Sold directly as commodity oil.
- Used as an alternative energy source to power various industrial production activities.
- Obtain non-standard diesel with higher value after distillation.
Gas: Syngas
- Used as fuel to power the thermal desorption plant.
- Used as clean fuel or sold after collection.
Solid: Harmless Residue
- Used as building materials such as permeable bricks.
- Used as filler such as oil well anti-collapse filling.
- Used as construction aggregate for road paving.
Versatile Applications of Thermal Desorption Unit Across Industries
Petroleum Derived Oil Sludge Recycling
Waste Sources:
- Mining & Storage: During the mining and storage of oil, oil-based drilling cuttings, oil-based mud, tank bottom oil sludge, etc. are formed.
- Refining: Refineries are also the main source of oil sludge. It mainly comes from the wastewater treatment stage.
- Shipyards: During the maintenance and operation of ships, some heavy oil hydrocarbon pollutants accumulate as oil sludge.
Problems Solved:
- Effective Recovery of Oil: Thermal desorption unit for drill cuttings can recover high-value oil from these high-oil content oil sludge. Thus, this reduces the burden of waste accumulation while obtaining reusable oil products.
- Reduce Ecological Burden: The solids in the oil sludge are treated into harmless residues. In addition, both waste gas and wastewater are effectively disposed of, thereby ensuring the safety of the ecological environment.
Oil-contaminated Soil Remediation
Waste Sources:
- Crude Oil Spills: Leaks occur during crude oil gathering and transportation. Leakage incidents can cause soil and pollution.
- Oily Pollutant Emissions: Oily pollutants from industrial activities such as steel smelting can seep into the soil.
- Oily Waste Storage Facilities: Oily waste storage facilities such as lagoons release large amounts of oily pollutants into the soil during dismantling and use.
Problems Solved:
- Soil Improvement: TDU can remove oily harmful substances from the soil and restore the soil to a state suitable for vegetation growth.
- Protecting Groundwater: Treating oil-contaminated soil can prevent oily pollutants from seeping into groundwater. This protects the quality of the water source.
Industrial Oily Hazardous Waste Treatment
Waste Sources:
- Coal Tar: This pollutant containing a large amount of harmful polycyclic aromatic hydrocarbons (PAH) is produced during coal gasification or coking. Its byproducts also include waste coal tar residue.
- Mineral Oil: Mineral oil is widely used in mechanical equipment in industrial manufacturing. It will become waste mineral oil due to aging or pollution.
- Emulsion: Emulsion is used for metal and mechanical processing. Waste emulsion that has reached the end of its service life contains oil, chemical additives and heavy metals.
Problems Solved:
- Harmless Treatment: Thermal pyrolysis system removes harmful components from these hazardous wastes. The treated waste meets environmental standards and achieves standard emissions.
- Reduce Operating Costs: By establishing a thermal desorption system, related companies can not only recover usable resources from oily waste. In addition, this can reduce high third-party treatment costs.
Advantages of Beston Thermal Desorption Equipment
Energy-saving Design
Beston TDU machine adopts a rapid heating system. And continuous and efficient heating can save some fuel costs and operating costs for investors.
Using special thermal insulation material. So, the thermal insulation effect is good. Investors can save some fuel costs.
It is more economical and environmentally friendly to use the syn-gas for heating the pyrolysis reactor.
Easy to Manage
The rotary reactor is easy to operate and easy to use. There is a discharging port and many inspection holes. The discharging and maintenance are easy.
This machine has been strictly designed, tested and run. Installation, disassembly and transportation are very convenient for investors.
The center console can control the entire production line. And workers won’t need high technical skills.
Safety and Green System
Thermal desorption reactor is not exposed to open flames. The safety performance and service life of the tyre to fuel recycling equipment have been greatly improved.
Exhaust emissions meet EU emission standards. And there is no external discharge of waste water and waste oil residue during the whole process.
This machine has many devices to ensure the safety, for example, temperature gauges, pressure gauges, etc.
What is Thermal Desorption Unit Price?
Beston thermal desorption unit prices start at $45000. Depending on the configuration selected by customers, the price will fluctuate. Our prices are not the lowest. But, it’s a great option. We not only provide reliable quality thermal desorption unit, but also provide a series of one-to-one services from pre-sales to after-sales by senior project consultants. Welcome to contact us for details.
When it comes to the costs associated with TDU, it includes more than just equipment expenses. It also encompasses expenses such as transportation, installation, operational, maintenance, etc.
Projects of Beston Thermal Desorption Plant Over the World
Beston thermal desorption unit has matured in operation in many pyrolysis plant projects around the world, including Nigeria, Oman, Chile, China, etc. The shipment and installation process of Beston machines went smoothly. And, these projects are running well. Beston equipment and services have been widely praised by customers. See the following cases.
What Are You Waiting For?
Beston thermal desorption units could help customers to process solid materials that contain oil. When operating this machine, the work environment is safe and clean. And there is no pollution to the local environment. Moreover, Beston provides a series of services to support customers. If you need this machine, contact Beston right now.
