| 摘要 |
The invention relates to a recess plate for a membrane filter device, the filter device having a stack of essentially identical recess plates, the recess plates having recesses, and the recesses forming filter chambers (3) between adjacent recess plates of the stack, into which filter chambers (3) a suspension can be supplied on a cake side of a filter cloth, and the suspension can permeate the filter cloth to a filtrate side thereof, such that a solid content of the suspension deposits on the filter cloth as a filter cake, each filter chamber (3) having a movable membrane, the membrane and the recess plate enclosing a squeezing chamber, the recess plate having an inlet duct (6) for inserting a pressurizing medium into the squeezing chamber, for mechanical pressing out of the respective filter cake. The invention further relates to a method for detecting membrane leakage in such membrane filter device. According to the invention it is suggested that, for each of the filter chambers (3) a shut-off valve (7) is provided for shutting the duct and a measuring device (8) for measuring pressure inside the squeezing chamber, and that the pressurizing medium is supplied into the respective squeezing chamber, after supplying the pressurizing medium the respective inlet duct (6) is tight closed, a pressure inside the squeezing chamber is monitored and detecting a decrease in the pressure is considered as evidence for a leakage of the respective membrane. |
