US 12,391,591 B2
Process cooling water system control systems and methods for iron and steelmaking applications
Faycal Finnouche, Algiers (AG); and David Oswald, Hartwell, GA (US)
Assigned to CHEMTREAT, INC., Glen Allen, VA (US)
Filed by CHEMTREAT, INC., Glen Allen, VA (US)
Filed on Aug. 25, 2020, as Appl. No. 17/001,720.
Prior Publication US 2022/0064037 A1, Mar. 3, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. C02F 5/08 (2023.01); C02F 1/00 (2023.01); C02F 103/02 (2006.01); C02F 103/16 (2006.01)
CPC C02F 5/08 (2013.01) [C02F 1/008 (2013.01); C02F 2001/007 (2013.01); C02F 2103/023 (2013.01); C02F 2103/16 (2013.01); C02F 2209/005 (2013.01); C02F 2209/02 (2013.01); C02F 2209/055 (2013.01); C02F 2209/06 (2013.01); C02F 2209/07 (2013.01); C02F 2209/10 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A process cooling water (PCW) system for an iron or steelmaking application, the PCW system comprising:
a plurality of sensors configured to sample a plurality of characteristics of the PCW system;
a Langelier Saturation Index (LSI)/Ryznar Stability Index (RSI) measurement unit coupled to the plurality of sensors, the LSI/RSI measurement unit configured to calculate one or more of LSI and RSI based on the plurality of characteristics of the PCW system; and
a scale inhibitor injection system having a scale inhibitor dosing pump, the scale inhibitor injection system configured to inject one or more scale inhibitors into the PCW system, the scale inhibitor injection system including a distributed control system (DCS) in communication with the LSI/RSI measurement unit and the scale inhibitor dosing pump, the DCS configured to adjust a dosing algorithm for dosing the one or more scale inhibitors in real time responsive to the calculated one or more of the LSI and the RSI to thereby control scale formation in the PCW system,
wherein the one or more scale inhibitors is at least one inhibitor selected from the group consisting of phosphonobutane-1,2,4-tricarboxylic acid (PBTC), amino-trimethylene phosphonic acid (ATMP), 1-hydroxyethylidene-1,1-diphosphonic acid (HEDP), phosphino carboxylic acid (PCA), phosphinopolyacrylates (PPCA), sulfonic acid copolymers-sulfonated phosphonocarboxylic acid, diethylenetriamine-penta (methylene phosphonic acid) (DTPMP), phosphor succinic oligomer (PSO), polyamino polyether methylene phosphonate (PAPEMP), 2-hydroxy phosphonoacetic acid (HPAA), hexamethylenediamine tetra-methylene phosphonic acid (HDTMP), bis(hexamethylene) triamine penta (methylene-phosphonic acid) (BHMTPMPA), polyacrylic acid sodium salt (PAAS), hydrolyzed polymaleic anhydride (HPMA), copolymer of acrylic acid and 2-acrylamide-2-methylpropane sulfonic acid (AA/AMPS), acrylic acid-hydroxypropyl acrylate copolymer-acrylic acid/acrylate/sulfosalt terpolymer (AA/HPA), polymaleic acids (PMA), maleic acid terpolymers (MAT), polyvinyl sulfonates, and acrylic acid maleic acid copolymer (MA/AA).