Managing oily sludge has long been a challenge for refineries, drilling sites, and industrial plants due to its complex composition and environmental risks. GN Separation offers a comprehensive Oily Sludge Treatment System designed to address these challenges with efficiency, environmental compliance, and resource recovery in mind.
A Complete Process for Oily Sludge Hot Washing
The GN Oily Sludge Treatment System is engineered to perform the entire oily sludge hot washing process. From sludge extraction to three-phase separation, the system integrates multiple technologies to ensure thorough treatment and maximum recovery. The core steps include:
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Sludge Extraction
The process starts with the extraction of oily sludge from pits or tanks using GN’s solid vacuum pump or mechanical excavators. -
Heating & Conditioning
The extracted sludge is transferred to a heating and pre-mixing tank, where it is stirred and conditioned. This step facilitates the breakdown of sludge structure, enhancing the effectiveness of the chemical treatment. -
Coarse Particle Screening
A high G-force vibrating screen is used to remove large solid particles from the conditioned sludge, preparing it for finer separation stages. -
Secondary Heating with Chemicals
The remaining fine sludge undergoes further heating and is treated with chemical agents. This helps to strip oil from solid particles, transferring it into the liquid phase for easier separation. -
Two-Phase Solid-Liquid Separation
Using GN’s decanter centrifuge, the sludge is separated into solid and liquid phases. The solids, with an oil content reduced to below 2%, can be further treated by biodegradation, pyrolysis, or incineration. -
Three-Phase Separation
The liquid phase is sent to a three-phase disc stack separator, which separates it into recoverable oil, reusable water, and residual solids. This step ensures maximum resource recovery and minimizes waste.
Flexible Models to Meet Diverse Needs
GN offers three standard models of the oily sludge treatment system:
| Model | Conditioning Capacity |
|---|---|
| GNOST-01 | 1–2 m³/h |
| GNOST-05 | 5 m³/h |
| GNOST-15 | 15 m³/h |
Each system can be customized based on the sludge characteristics and operational needs of the client. GN engineers will analyze sample material and offer tailored configurations to ensure optimal performance.
Core Equipment in the System
GN’s oily sludge treatment solution is built around several high-performance machines, including:
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Solid Vacuum Pump – Efficiently extracts and transfers sludge over long distances.
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High G Vibrating Screen – Separates coarse solids from heated sludge.
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Decanter Centrifuge – Performs high-speed solid-liquid separation with minimal residual oil.
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Three-Phase Disc Separator – Extracts oil, water, and solids with high precision and G-force.
Applications Across Industries
GN’s oily sludge treatment system is widely applied in:
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Oil refineries (e.g., tank bottom sludge)
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Drilling operations (drilling waste treatment)
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Oil tank cleaning
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Industrial oily wastewater treatment
Whether handling refinery waste or tank cleaning sludge, GN’s system delivers reliable results with a focus on environmental safety, operational efficiency, and oil recovery.
Resource Recovery & Environmental Benefits
After treatment:
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Oil is recovered and can be reused or sold.
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Water is recycled for hot washing or cleaning.
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Solid residue has significantly reduced oil content, making it suitable for environmentally safe disposal or further treatment.