Nalco Chemical Company

Other

James J Hickey

William L Adamson

John E Hoots

Donald A Johnson

Barbara E Moriarty

Wayne H Hoy

An apparatus to continuously measure the level of a water treatment product added to boiler feedwater for prevention of scale formation in boiler tubes, which includes a pump turbidimeter analyzer receiving a sample of the treated boiler feedwater and mixing it with a reagent to produce turbidity in the sample that is photometrically measured to determine product level.

Apparatus for continually and automatically measuring the level of a

A method to continuously measure the level of a water treatment product in boiler feedwater. The product, which includes a copolymer of acrylamide and acrylate and a copolymer of acrylic acid and sodium vinyl sulphonate, is added to the feedwater to prevent the formation of scale in the boiler tubes. The method comprises reacting a sample of the feedwater with a reagent to produce turbidity in the sample and further mixing the newly reacted sample with a portion of previously measured reacted sample. The mixture of previously measured reacted sample and newly reacted sample are then photometrically measured in a pump turbidimeter analyzer to determine the level of product in the feedwater.

Method for continually and automatically measuring the level of a water

The performance of a treating agent added to a body of water employed in a cooling tower is continuously monitored by real-time analysis of a spectral or chemical characteristic of an inert tracer proportioned to the treating agent, said characteristic being indicative of tracer concentration, and converted to a voltage analog. The voltage analog is compared to a monitor value representing par performance and if performance is nonstandard (nonpar) a signal is generated which alters the output of a pump which feeds the dosage of treating agent containing proportioned tracer.

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Palos Heights, IL, United States of America

James J Hickey