| 摘要 |
<p>Cone or dome-shaped inflatable roof (2) for biogas tank (1), comprises gas-tight and liquid-tight outer film (4) comprising a container mantle with circular or angular basic form on open top of outer wall of tank and heat protection film underneath the outer film, where cone is gastight and comprises in edge area a variety of fermentation gas passage apertures. Independent claims are also included for: (1) biogas passage openings reinforced by chain together with yarn, or by introducing passage rivets from plastic or light metal, or by welding on a reinforcement ring made from the same plastic material as the insulation film; (2) the biogas tank with cone or dome shaped carrying air roof; and (3) thermic protection film for biogas tank comprising gas-tight with variety of fermentation gas passage apertures in the edge area.</p> |
