Apparatus for reducing pressure fluctuation

A rotary pressure filter, comprising

• a filter housing, and
• a filter drum rotatable around a rotation axis and accommodated inside the filter housing,
• wherein the filter drum comprises a plurality of filter cells arranged in a succeeding manner in a peripheral direction of the filter drum,
• wherein the rotary pressure filter is divided into a plurality of treatment zones which are separated by sealing elements,
• wherein the plurality of treatment zones comprises at least a suspension insertion zone which is adapted to introduce a suspension to be filtered into the filter housing and onto the filter cells, and a discharge zone which is adapted to remove a filter cake being a solid result of filtration of the suspension from the filter cells, and
• wherein the rotary pressure filter is configured in its operating state such that a pressure being present in the suspension insertion zone is higher than a pressure being present in a discharge zone, and that, each time a respective filter cell, coming from the discharge zone and containing gas having a pressure of the discharge zone, enters the suspension insertion zone, the pressure in the suspension insertion zone drops,
• wherein the rotary pressure filter further comprises equipment that is configured to reduce or to slow the pressure drop of the pressure in the suspension insertion zone each time the respective filter cell coming from the discharge zone enters the suspension insertion zone.