초록 ▼

The flow of waste water sludge flocculant to a dewatering system is regulated by a surface proximity sensor located downstream of the flocculant addition point. Depth, variability and continuity of a partially drained sludge mat are evaluated by a depth sensor signal processor/analyzer. Signal chara

The flow of waste water sludge flocculant to a dewatering system is regulated by a surface proximity sensor located downstream of the flocculant addition point. Depth, variability and continuity of a partially drained sludge mat are evaluated by a depth sensor signal processor/analyzer. Signal characteristics representative of an optimally flocculated sludge mat are referenced by the processor/analyzer to establish high and low control set-point values. A variable speed flocculant supply pump or flow control valve is adjusted in response to an operational signal from the depth sensor which exceeds the set-point range.

대표청구항 ▼

A method of controlling the flow rate of flocculant chemical into the aqueous sludge influent of a sludge dewatering means, said method comprising the steps of: remotely sensing the depth and variability of surface characteristics of a sludge residual mat carried on a continuous dewatering screen su

A method of controlling the flow rate of flocculant chemical into the aqueous sludge influent of a sludge dewatering means, said method comprising the steps of: remotely sensing the depth and variability of surface characteristics of a sludge residual mat carried on a continuous dewatering screen surface within said dewatering means while in transition from a gravity drainage zone of said dewatering means and in transit to a high pressure expression means; generating first electrical signals corresponding to said residual mat depth and variability of surface characteristics; analyzing said first signal for deviation from a value range corresponding to depth and consistency characteristics of said sludge indicative of an acceptable flocculant flow rate of mixture with said sludge influent; and, generating a second signal responsive to said analysis for operating flocculant flow control means in a deviation corrective direction.