Beer filtering device

Abstract

A beer filtering device of a filter press type for filtering a beer stock. The beer filter device includes a plurality of filter plates (4) and a plurality of filter frames (6) arranged side by side in alternate relationship to each other. A filter element (28) is supported to each filter plate (4). A stock line (66) for supplying a beer stock and a filtrate line (68) for discharging a filtrate of the beer stock are so formed as to penetrate through the filter plates and the filter frames in the thickness direction thereof. The stock line and the filtrate line are sealed by a plurality of stock line seals (48) and a plurality of filtrate line seals (74), respectively, each interposed between the filter plate and the filter frame adjacent to each other in a filtering step. A plurality of washer liquid seals (76) are provided outside the stock line seals and the filtrate line seals in such a manner that each washer liquid seal is interposed between the filter plate and the filter frame adjacent to each other. In a washing step, a space defined by the filter plates and the filter frames is sealed by the washer liquid seals under the condition where the sealed condition of the stock line and the filtrate line by the stock line seals and the filtrate line seals is released. In this condition, a washer liquid is circulated in the sealed space defined by the washer liquid seals to thereby extensively wash and sterilize the interior of the beer filtering device.