| 摘要 |
In a biogas-producing digester, a lifting unit raises and lowers an immersed, motor-driven stirrer. A carrier is vertically orientated in the vessel, mounted in upper and lower bearings. The unit is moved up and down on a rope winch. This includes a rope drum fixed to the carrier, and having a horizontal shaft. The rope is connected to the unit at one end, to the drum at the other. The control panel is located outside the vessel. In new design, the rope drum (24) is located in the upper part of the vessel (3). This avoid the need for a gas-tight lifting cable gland in the vessel wall. The operational unit (32) is located outside the vessel, connected to the drive (30) of the rope drum, using a sealed lead-through in the vessel wall. |
