AUTOMATIC CONTROL OF A BELT FILTER PRESS FOR USE IN SLUDGE PROCESSING

摘要

The invention allows automatic control of a belt filter press (310) that is used in sludge processing. A first monitoring signal is received at a control apparatus (200) from a first optoelectronic measurement device (351). The first monitoring signal indicates a level of packing of an upper filter cloth (302) in front of a first pair (303) of nip rolls of the belt filter press (310). The control apparatus (200) determines whether the indicated level of packing is below a first packing threshold or exceeds a second packing threshold. In response to the indicated level of packing being below the first packing threshold or exceeding the second packing threshold, the control apparatus (200) causes a first control signal to be sent to the belt filter press (310), the first control signal instructing the belt filter press (310) to increase or decrease a nip pressure of the first pair (303) of nip rolls, respectively.