Operation principle of double film gas holder

The double film gas holder is 3/4 spherical in shape and is fixed on the cement base by the steel rail. The main body is made of specially processed polyester material (the main component is PVDF- polyvinylidene fluoride and special anti-corrosion formula), the cabinet is composed of outer film, inner membrane, bottom film (on the ground cabinet) and auxiliary equipment, with the ability to resist ultraviolet light and various microorganisms, high fire prevention and in line with German standards. An airtight space with variable capacity is formed between the inner membrane and the bottom membrane (upper cabinet) for gas storage, and the outer membrane forms the spherical shape of the storage cabinet. When the inner membrane air intake is reduced, the outer membrane is injected into the inner and outer membrane by the blower to maintain the design pressure of the inner membrane gas. When the air volume is increased, the inner membrane is stretched normally, and the excess air of the outer membrane is discharged through the safety valve, so that the inner membrane gas pressure is always constant at a required design pressure. The insulation principle of the adjustable film gas holder: air is filled between the inner and outer film, which can effectively block the cold air from the outside world.