How can chlorination be made more effective?
Thread Content
This post was last edited by cdpulin on 2010-9-14 10:35. When dealing with circulating water, how can we achieve good results from chlorination?
With a pipeline mixer and an online residual chlorine detector, there will be no problems
In fact, having equipment for uniform mixing and devices for detecting residual chlorine can certainly help increase the amount of chlorine added and achieve better results. However, adding chlorine based on water quality conditions is a prerequisite for achieving optimal results; therefore, the monitoring of water quality indicators and microbial indicators is particularly important.
During chlorination, the pH value of water should not be too high; a certain level of residual chlorine must be maintained in the water, with this residual chlorine level generally needing to stay between 0.5 and 1.0 ppm over a certain period of time. Chlorination is usually carried out in a shock manner, achieving the required levels in a short time and maintaining them for a period. The chlorination point is also important; it is generally best to locate it near the bottom of the cooling tower basin, so that the bactericidal effect of chlorine can be effectively utilized. All of the above factors contribute to improving the efficiency of chlorination
Chlorine disinfection relies mainly on hypochlorous acid, while the disinfecting effect of hypochlorite is 1/20 that of hypochlorous acid; therefore, it is necessary to control the pH, which should generally be maintained between 4 and 7. If the pH exceeds 8, the concentration of hypochlorous acid drops to around 20%. Minimize the consumption of chlorine, and reduce the levels of ammonia, hydrogen sulfide, etc. as much as possible. The best location for adding chemicals is at the inlet of the circulation pump in the cooling tower basin, at a depth of 2/3 of the normal water level. Try to stagger the timing of adding corrosion inhibitors, scale inhibitors, and chlorine.