The application of residual chlorine analyzer in drinking water is crucial. It is mainly used to detect and monitor the residual amount of disinfectant chlorine in the water treatment process – that is, residual chlorine. The following are the main application points of residual chlorine analyzers in the drinking water field:

1.The standard value of residual chlorine in drinking water: In accordance with the latest “Hygienic Standards for Drinking Water” (GB5749-2022), the specific regulations are as follows:
When the contact time between factory water and water is ≥30 minutes, the limit value of free chlorine is ≤2mg/L, and the remaining free chlorine in factory water is ≥0.3mg/L. The content of free chlorine in the water at the end of the pipe network should not be less than 0.05mg/L.

2.Disinfection effect verification: In the water treatment process, chlorine is one of the most commonly used disinfectants. Adding chlorine can kill bacteria, viruses and other harmful microorganisms in the water and ensure water quality safety. The residual chlorine analyzer can accurately measure the concentration of free chlorine (including Cl₂, HOCl, OCl⁻) and/or combined chlorine (such as NHCl₂, etc.) remaining in the water after disinfection to ensure the effectiveness of the disinfection process.

3.Water quality supervision: According to national or regional drinking water hygiene standards, factory water and pipe network terminal water must maintain a certain level of residual chlorine, which can not only ensure continuous disinfection capabilities and prevent secondary pollution, but also prevent excessive chlorine from harming human health. pose a potential threat. The residual chlorine analyzer monitors the residual chlorine content in real time to ensure that the water quality meets the standards.

4.Automated control: In modern water treatment plants and water supply systems, residual chlorine analyzers can be integrated with the control system to realize automated chlorine addition and closed-loop adjustment of residual chlorine concentration to ensure precise control of the disinfection process.

5.Emergency response: When water sources are affected by sudden pollution incidents, residual chlorine analyzers can quickly reflect changes in water quality and help decision-makers take timely response measures.

6.Residential drinking water safety assurance: For residential households and small water supply facilities, there are also portable or household residual chlorine detection equipment, which facilitates users to detect the residual chlorine level in their own drinking water and enhances trust in the safety of drinking water.

7.Environmental protection and health assessment: Long-term monitoring and recording of residual chlorine can help environmental protection departments and public health agencies evaluate water quality stability, prevent the occurrence of water-borne diseases, and provide data support for the development of more scientific and reasonable disinfection strategies.

In short, the application of residual chlorine analyzer in the drinking water industry ensures the safety and reliability of water quality and is an indispensable technical tool for ensuring public drinking water hygiene.

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