The invention relates to a
liquid solid separating method for regenerating filtrate medium in filter, comprising the steps of: separating
liquid solid two phases, removing
filter cake, removing the filtrate medium and replacing the filtrate medium. Suspending liquid which is to be separated and includes fine
solid grain is pumped into a novel quick opening type pressure leaf filter; under the function of the pressure of the pump, the
solid phase grain is intercepted on the surface of the filtrate medium so as to form the
filter cake; and the filtrate liquid passes through the
filter cake and the filtrate medium and enters into the centre
pipe of a filtrate disc so as to be discharged after being gathered. After the step of separating, a rotate positioning device drives a
filter element to be rotated at an uniform speed, high-pressure water disassembles and cleans the filter cake which is covered on the filtrate medium by a nuzzle, and the filtrate medium is regenerated. The step of replacing the filtrate medium is carried out by
fast switching the filter by a pneumatic control quick opening device. Compared with the prior art, the invention has the advantages of reasonable structure,
safe operation, high work efficiency, high equipment
automation degree, less management and maintenance
workload, safe use, wide application range, etc.