oil free screw blower for pneumatic conveying in power plant

Oil-free screw blowers feature a sophisticated structure designed to deliver high efficiency, low energy consumption, and low noise performance. Widely utilized across environmental protection, sewage treatment, gas transmission, and precision manufacturing industries, these blowers provide reliable, oil-free compressed air for sensitive applications.

Technical Parameters

• Flow rate range: 2.6 to 92 m³/min
• Pressure range: 0.04 to 0.2 Mpa
• Power range: 7.5 to 220 kW
• Drive mode: Permanent magnet frequency conversion
• Cooling mode: Air-cooled
• Outer cover: Optional (with or without)

Main Features of Oil-Free Screw Blower

1. Oil-free design: 100% oil-free compression system ensures no oil contamination, making it ideal for industries with strict air quality requirements such as food processing and pharmaceuticals.
2. Low energy consumption: Absolute compression principle delivers over 75% efficiency—saving 20–30% more energy than traditional Roots fans, significantly reducing operational costs.
3. Low noise: Optimized screw rotor and airflow design keep noise below 75dB, ideal for environments where quiet operation is critical.
4. Flexible operation: Permanent magnet variable frequency drive adapts blower speed to load, ensuring efficient performance under varying conditions and providing higher exhaust pressure and lower pressure pulsation.
5. Low-cost operation: No oil changes or complex maintenance required; optimized design reduces energy usage and extends equipment life, lowering total operating expenses.
6. Air-cooled system: Reliable, low-maintenance air cooling keeps the blower stable during prolonged high-intensity operation and prevents overheating.
7. Optional cover: Customizable cover option enhances protection against dust and pollutants, suitable for diverse working environments.

Working Principle

The oil-free screw blower operates through the relative motion of a screw rotor. The motor drives the rotor to draw in air, which is compressed as it passes through the screw cavity. The gas volume decreases, pressure rises, and the clean, oil-free air is discharged. With no oil involved in compression, the system guarantees clean airflow, reduced maintenance, and high stability.

Application Fields

• Wastewater treatment: Provides oil-free, high-quality air for aeration systems, preventing water contamination.
• Gas transmission: Ensures efficient, stable gas flow in chemical, metallurgical, and petroleum sectors.
• Electronics & Semiconductors: Delivers pure air for sensitive manufacturing, maintaining stringent environmental standards.
• Precision machinery: Supports pneumatic tools and control systems in high-end manufacturing, ensuring accuracy and stability.
• Industrial air supply: Stable, clean air for steel, automotive, pulp, and paper industries, promoting efficient and safe production.
• Environmental protection: Essential for exhaust gas treatment systems, with low energy consumption and noise, and minimal maintenance.
• Agriculture & food industry: Supplies clean air for food processing and agro-meteorological equipment, ensuring safety and efficiency.