Method and Device for Preventing Corrosion in Hot Water Systems

摘要

Disclosed is a method of controlling a real-time oxidation-reduction potential in a hot water system to inhibit corrosion in the hot water system. The method includes defining one or more operational protective zones in the hot water system. One or more of the operational protective zones includes an oxidation-reduction potential probe that is operable to measure a real-time oxidation-reduction potential in the hot water system at operating temperature and pressure. The probe transmits the measured real-time potential to the controller, which assesses and interprets the transmitted potential to determine whether it conforms to an oxidation-reduction potential setting. If the measured potential does not conform the oxidation-reduction potential setting, the controller is operable to feed or remove one or more active chemical species into or from the hot water system and further operable to change at least one system parameter.

主权项

1. A method of controlling a real-time oxidation-reduction potential (“ORP”) in a hot water system to reduce corrosion in the hot water system, the method comprising:
(a) defining one or more operational protective zones (“zone” or “zones”) in the hot water system; (b) selecting at least two of the defined zones, wherein at least two of the selected zones includes at least one ORP probe operable to measure the real-time ORP and communicate with a controller; (c) either intermittently or continuously measuring the real-time ORP at one or more of the selected zones while the hot water system is at operating temperature and pressure; (d) transmitting the measured real-time ORP to the controller; (e) assessing whether the measured real-time ORP or a calculated ORP based upon the measured real-time ORP conforms to an ORP setting, wherein the ORP setting is either a same ORP setting for each of the selected zones or a different ORP setting for at least two of the selected zones; (f) performing at least one of the following actions if the measured real-time ORP or the calculated ORP does not conform to the ORP setting: (i) feeding an effective amount of one or more active chemical species into the hot water system, (ii) removing an effective amount of one or more active chemical species from the hot water system, and (iii) changing a system parameter; and (g) optionally ramping from one of the selected zones to another one of the selected zones after a triggering event.