| 摘要 |
The invention relates to a biogas plant fermentation tank having a service device, provided with a service opening (8) on the ceiling side that can be locked, preferably in a gas-tight manner, using an covering device (15). The service opening (8) makes it possible to access an immersion apparatus (44), in particular a submersible stirrer or an immersion pump, which is guided on a height-adjustable guide mast (17) for maintenance and service work. According to the invention, the guide mast (17) is rotatably and/or pivotably mounted at a bearing location (18) of the service device by way of a bearing shaft (19), wherein the bearing shaft (19), in order to rotate or pivot the guide mast (17), is coupled by means of a guide mast pivoting device (21) arranged outside the fermentation tank (1). The immersion apparatus (44) is coupled to an immersion apparatus height adjustment device (24) arranged outside the fermentation tank (1), which is provided with a drive shaft (23), which, together with the bearing shaft (19) of the guide mast pivoting device, is guided in a hollow shaft arrangement (25) through the bearing surface (18) of the service device into the inner chamber (14) of the fermentation tank. The drive shaft (23) in the inner chamber (14) of the fermentation tank interacts, directly or indirectly, with an adjustment element (28), by means of which the height of the immersion apparatus (44) on the guide mast (17) can be adjusted. |
