Method and device for preventing corrosion in hot water systems
A hot water system and equipment technology, applied in the field of preventing corrosion and equipment in the hot water system, can solve problems such as polarization, poor reliability, and dull ORP measurement equipment at room temperature, so as to increase efficiency and reduce The effect of small operating costs
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example 1
[0062] figure 1 A simplified 3-component hot water system is depicted. Make-up water flows through the "deaerator", the "FW pump" and into the "boiler". The boiler in turn generates "useful steam" that is used for various downstream processes. In this example, the figure 1 The outlet of the deaerator marked as "1" or figure 1 ORP is monitored / controlled at the outlet of the FW pump marked "2". Can react to REDOX Stress in real time as it happens independently in the deaerator and / or FW pump. Active chemicals can also be fed into the deaerator after the deaerator and / or after the FW pump for more specific corrosion control.
example 2
[0064] figure 2 A more complex boiler configuration is illustrated, including multiple feed water pumps, multiple heat exchangers, and a steam generator (ie, boiler). In such configurations, any number (ie, one, two, or more) of condensers, heat exchangers, pumps, boilers, process steam applications, etc. may be used. exist figure 2 , it is shown as solid arrowed lines as the flowing feedwater moves towards the "use of process steam" zones 1 and 2. The condensed steam is shown as a dashed arrowed line as it is fed to various plant equipment locations which may include the shell side of the heat exchanger or returned directly to the condensation area. Condensate that does not meet plant water specifications for boiler feed water can be taken out of the system as blowdown, if desired.
[0065] Examples of locations where ORP can be monitored / controlled and / or feed locations for active chemicals are identified as figure 2 "22" in . Such user-controlled positioning allows fo...
example 3
[0067] image 3 Depicts how ORP settings can vary for systems at different temperatures. image 3 The temperatures shown in may represent, for example, different plant installations or different operating protection / control zones within the same plant installation. In this example, the ORP setting is an ORP setting range selected from a series of ranges shown as vertical lines labeled "Preferred", "Broader", "Broadest". Depending on the sophistication (ie, operating constraints) of the equipment in the plant facility, the available ORP setting range or point may vary. That is, some plant units are capable of handling a narrow or preferred range of ORP settings, while other plant units are only capable of handling a wider range of ORP settings.
[0068] Reference electrode in equilibrium with external pressure with 0.1 normal potassium chloride fill solution (at image 3 Indicated as "EPBRE"), the TORP number will typically be recorded. This can be achieved through "Heat Ex...
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