US 11,780,742 B2
Methods for online control of a chemical treatment solution using scale saturation indices
Kevin Boudreaux, Sioux Falls, SD (US); Bill Gonzalez, Glenwood, NJ (US); and Kerry Killough, Cypress, TX (US)
Assigned to CHEMTREAT, INC., Glen Allen, VA (US)
Filed by CHEMTREAT, INC., Glen Allen, VA (US)
Filed on Nov. 24, 2020, as Appl. No. 17/103,018.
Claims priority of provisional application 63/015,042, filed on Apr. 24, 2020.
Prior Publication US 2021/0331942 A1, Oct. 28, 2021
Int. Cl. C02F 1/00 (2023.01); C02F 5/12 (2023.01); C02F 5/14 (2023.01); C02F 103/10 (2006.01)
CPC C02F 1/008 (2013.01) [C02F 5/12 (2013.01); C02F 5/14 (2013.01); C02F 2103/10 (2013.01); C02F 2209/02 (2013.01); C02F 2209/055 (2013.01); C02F 2209/06 (2013.01); C02F 2209/07 (2013.01); C02F 2301/046 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for applying a chemical treatment solution to a process stream in an industrial processing system comprising a heat exchanger, the method comprising, while the system is online:
measuring a mineral hardness and alkalinity of the process stream;
measuring an inlet-side temperature and an outlet-side temperature of the heat exchanger and determining a skin temperature of the heat exchanger based on the inlet-side temperature and the outlet-side temperature;
determining a dosage of the chemical treatment solution based on a relationship between the dosage and a scale saturation parameter that is calculated based on the mineral hardness and the alkalinity of the process stream, and the skin temperature of the heat exchanger; and
controlling application of the chemical treatment solution to the process stream based on the determined dosage.