Problems with chlorine dioxide disinfection in the circulating water system of ammonia synthesis plants
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Dear seniors: Is there anyone familiar with the operation of chlorine dioxide disinfection in the circulating water system of ammonia synthesis plants, as well as the control methods and potential problems that may arise?
Chlorine dioxide has a strong oxidizing capacity; pay attention to the compatibility issues between it and chemicals such as corrosion inhibitors, scale inhibitors, and descaling agents used in the system. To prevent its active ingredients from being oxidized. The method for analyzing residual chlorine is different from before:handshake
Our factory uses CL2 for sterilization, adding chlorine at regular intervals every day, and supplementing it further based on the analysis results. Strictly control the residual chlorine level in water to prevent intergranular corrosion of chloride ions in the equipment. Using manual chlorination with chlorine cylinders to supply chlorine carries certain risks. There was one leak; no one was injured, but it killed all the grass and trees in the surrounding area
The ammonia synthesis plant is not a particularly special system either; standard procedures should be followed, with chlorine dioxide being added continuously to maintain a residual chlorine level of 0.2–0.5 mg/l. It is important to monitor for ammonia leaks, as ammonia serves as an excellent nutrient source for bacteria.
I. Properties: Chlorine dioxide is a strong oxidizing agent; it is not carcinogenic, does not cause birth defects, and has no mutagenic effects. Compared to chlorine, chlorine dioxide has the following advantages: it can not only kill common microorganisms but also eliminate fungal spores and viruses ； Does not react with ammonia, phenols, and unsaturated compounds ； pH changes have little impact on the bactericidal effect, making it particularly suitable as a biocide in the circulating water of fertilizer plants ； It can completely replace chlorine and non-oxidizing biocides, making it very economical. II. Applications: Due to its high efficiency, broad spectrum of action, non-toxicity, and lack of irritancy, chlorine dioxide is a new generation of safe and multi-functional disinfectant. It can be widely used in drinking water, circulating cooling water, environmental disinfection, food preservation, deodorization, and medical device disinfection. It can also be used for the bleaching of pulp and fabrics. Decolorization of sugar, food processing, sterilization and disinfection of processing equipment, etc. III. Usage Method: When used as a biocide and algicide in circulating cooling water, chlorine dioxide can replace chlorine, with a dosage of 30–50 mg/L every 2–3 days. Before use, it is activated with acid for 10–15 minutes, and then placed into the suction inlet of the circulation water pump. 100~200 mg/L can be added for sludge stripping. Chlorine dioxide should be used immediately after activation. IV. Safety Protection: Chlorine dioxide is packaged in plastic drums, with a weight of 25 kg per drum, or as specified by the customer ； Store in a well-ventilated, cool indoor area