ABEL HP – Filter Cloth Cleaning
Chamber or membrane filter presses are still frequently the best possibility for dewatering slurries and suspensions. The disadvantages of intermittent operation are usually offset by a higher percentage of dry solids in the filter cake. Chamber and membrane filter presses consist of several filter plates covered with cloth. Depending on the slurry and the filter cloth being used, the cloths have to be cleaned at regular intervals to sustain the dewatering capability of the press.
For more than 30 years, Abel has been offering high-pressure plunger pumps for cleaning filter cloth from chamber and membrane filter presses. The pumps are primarily triplex pumps whose plungers run with a 120° crank offset which, together with a pre-charged membrane type pulsation damper, results in low residual pulsation. 3/2-way valves are used for the special application of filter cloth cleaning. When changing the washing system from one filter plate to another, the 3/2-way valve is changed over to bypass. This ensures that the washing water is not pumped back to the nozzles until the washing system spray reaches the next filter plate. A manually operated control valve is also used for fine adjustment of the required nozzle pressure.