As the name suggests, a double-membrane gas holder is a storage container with a dual-layer membrane structure. It is specifically designed for pressure stabilization and gas storage, providing significant protection to subsequent costly equipment and extending the duration of stable equipment operation, thereby prolonging its overall lifespan.
Double-membrane gas holders are primarily composed of two parts: an inner membrane and an outer membrane. The inner membrane isolates and stores the gas while maintaining pressure stability, while the outer membrane ensures constant pressure output of the stored gas and provides protection to the inner membrane. Compared to traditional steel gas holders, double-membrane gas holders are cost-effective, quick to install, and easy to transport. They exhibit strong pressure stabilization and corrosion resistance. Gas pressure stabilization is crucial for maintaining stable operation of subsequent costly equipment and slowing down its aging process. Double-membrane gas holders have become a popular solution for gas pressure stabilization and storage in applications such as biomass biogas projects, wastewater treatment projects, and biomass gasification projects.
Double membrane gas holders operate reliably at pressures up to 30 mbar, with a precise fill level measurement system that monitors gas volume in real time. A constant air supply system maintains stable pressure between the inner and outer membranes. The combination of high-quality membrane materials and structural design ensures excellent resistance to wind and snow loads. Integrated safety devices – including overpressure valves and blow-off pipes – prevent downtime and ensure high operational reliability.
Double membrane gas holders offer low investment and operating costs, minimal maintenance expenses, and short construction time. Even with modest investment, very large storage volumes can be realised – delivering high economic efficiency.
The membrane is high-frequency welded per DIN 18204-1, with heat applied directly at the seam to create a strong, uniform bond. The fabric is UV-stable, weatherproof, biogas-resistant, anti-mould treated, and flame-retardant (B1 class).
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