E-mail: michael@shboqu.com   |   Expert in Water Quality Measurement and Water Treatment Project

Do you know what are the hazards of the residual chlorine analyzer?

by:BOQU     2023-03-21
The highly intelligent on-line continuous monitor for residual chlorine is composed of sensors and secondary instruments. It can measure residual chlorine, pH value and temperature at the same time. It can be widely used in the continuous monitoring of residual chlorine and pH value of various water quality in electric power, waterworks, hospitals and other industries. 1. Tap water is mostly disinfected with chlorine gas. After chlorine gas dissolves in water, it will become hypochlorous acid or hypochlorite ion, commonly known as effective residual chlorine, because hypochlorous acid has a very high oxidation ability, such as tap water contains effective residual chlorine, which can prevent bacteria from growing (pathogens) and stay In water distribution pipes, the available residual chlorine plays a very important role in the safety and sanitation of tap water. 2. Use chlorine-containing disinfectant to disinfect and sterilize tap water, which is cheap, effective, easy to operate, very popular and safe to use. But chlorine has a good killing effect on bacterial cells, and it also has serious effects on other biological cells and human cells. 3. In 1974, Rook in the Netherlands and Belier in the United States found that pre-chlorinated and chlorinated water contained disinfection by-products (DBPS) such as trihalomethanes (THMS) and chloroform, which were carcinogenic and mutagenic. In the mid-1980s, another haloacetic acid (HAAS) was found to be more carcinogenic, such as chloroform, dichloroacetic acid (DCH), and trichloroacetic acid (TCA), which were 50 and 100 times more carcinogenic than chloroform, respectively. Second-rate. So far, with the advancement of science and technology, 2,221 organic pollutants have been detected in water sources, and 65 of them have been found in tap water, including 20 carcinogens and 56 mutagens. 4. In order to ensure that the tap water meets the safety and hygiene requirements and avoid the occurrence of water-borne infectious diseases, disinfectants should be added to the tap water during the water purification process to inactivate pathogenic microorganisms in the water. Due to the high cost performance of chlorine, it is widely used in the domestic water treatment industry. 5. Residual chlorine means that after chlorine is put into water, in addition to consuming a part of the chlorine through the interaction with bacteria, microorganisms, organic matter, inorganic substances, etc. in the water, there is also a part of residual chlorine, which is called residual chlorine. . Residual chlorine can be divided into combined residual chlorine and free residual chlorine. The total residual chlorine is the sum of combined residual chlorine and free residual chlorine. If there is no chlorine or not enough chlorine in the factory water, it will be stored in the pipe network. It may cause a large number of microorganisms such as bacteria and Escherichia coli to multiply, and affect the water quality of the pipe network. Therefore, the water supply network must ensure a certain amount of residual chlorine. 7. my country's 'Drinking Water Hygienic Standards' stipulates that the chlorine content after 30 minutes of contact with water should not be lower than 0.3mg/L. In addition to plant water, centralized water supply should meet the above requirements, and the water at the end of the pipe network should not be less than 0.05mg. /L.
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