Seeking help regarding the use of sodium hypochlorite in power plant circulating water
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At RTRT, we used to employ synthetic hypochlorite as an oxidizing disinfectant, but now we have switched to an automatic dosing system that uses sodium hypochlorite. There are two issues regarding this, and we hope professionals can offer their guidance: 1. When using a metering pump to add sodium hypochlorite to the circulating water, is it better to do so continuously throughout 24 hours or in intermittent bursts? For example, the pump runs for 3 or 4 hours per day. The water quality in the circulating water system of my power plant remains good throughout the year; there is just some green algae on the columns. If the dosing point for sodium hypochlorite is located too close to the dosing point for corrosion and scale inhibitors, could these two types of chemicals affect each other? We are using a low-phosphorus corrosion and scale inhibition agent. The two dosing ports are used to inject the agent into two separate water pipelines, but the water from these two pipelines meets together at a point 50 meters away. We are concerned that the agents might affect each other; we would appreciate any advice you can offer!
Continuous addition tends to lead to the formation of antibodies, while intermittent addition prevents green algae from growing. Failing to remove waste water in a timely manner can result in the formation of sludge and similar issues. Therefore, it’s not possible to simply determine which method is more effective; it’s best to use a non-oxidizing fungicide once or twice a month to achieve better results. Second question: If your scale-inhibiting agent contains the copper corrosion inhibitor BTA, then it cannot be added together, as this will destroy the structure of BTA, and such damage is irreversible; it’s best to keep them separate
Okay, thank you for your reply. It’s very helpful, thank you
Pharmaceutical manufacturers generally provide guidance on dosage based on water quality analysis. Generally, oxidative and non-oxidative bactericides need to be used alternately in cycles to prevent microorganisms and algae from developing resistance. Fungicides do not need to be added every day; oxidizing fungicides should be used once a week, while non-oxidizing fungicides should be used once every three weeks. The interval can be shortened slightly during seasons with high temperatures.