Application method of ozone in swimming pool


1. The traditional method of ozone sterilization and disinfection of swimming pool water The traditional theory of ozone disinfection of swimming pools believes that: ozone is a very strong oxidant and is toxic, so ozone is absolutely not allowed to enter the swimming pool. Because the specific gravity of ozone is greater than that of air, if it is separated from the water, it will float on the water surface to form a higher concentration of ozone layer, which is easy to be inhaled by people and cause poisoning. Therefore, before the water reacts with ozone and returns to the swimming pool, it must pass through the deozone device to prevent the remaining ozone from entering the swimming pool.

The traditional ozone disinfection method for swimming pool water treatment has the following characteristics: ◆The dosage of ozone is 0.8-1.0mg/1; ; ◆Ensure that after the reaction between ozone and water, the remaining ozone concentration in the water is not less than 0.4mg/1; ◆Use activated carbon to remove all remaining ozone before entering the pool; 0.6mg/l. In practical application, the above method has the following problems: ◆Ozone utilization rate: The traditional swimming pool ozone disinfection process needs to remove the remaining ozone. The specification requires that the concentration of ozone dosing is around 1.0mg/l, and the concentration of residual ozone is greater than 0.4mg/l. The remaining 0.4mg/l of ozone is removed without being used, which means that the used ozone is only about 0.5mg/l. The rest of the ozone is wasted.

Moreover, after the ozone is removed, chlorine needs to be added as a long-term disinfectant. ◆Infrastructure investment issues: According to the traditional swimming pool circulating water ozone disinfection method, the contact time between ozone and water is preferably more than 3 minutes. If the shortest contact time is 2 minutes, for a standard pool (about 2400m3), the water treatment cycle The flow rate is 400m3/h, and the flow rate in 2 minutes is 13.3m3. According to the requirements, the filtration rate of the activated carbon filter tank is 30m/h, which requires a filtration area of ​​13.3 m3 activated carbon filter tank, which will greatly increase the area of ​​the machine room, and at the same time, the cost of the ozone system will increase by more than 30%. In fact, if the ozone is not removed, these problems may be solved.

Therefore, many units at home and abroad have carried out research and application of this method. 2. Theoretical analysis of the ozone disinfection method Domestic and foreign analysis and research show that: The ozone concentration in the air greater than 0.1mg/1 hour can stimulate the human respiratory organs, and at this concentration, it has little effect on the human body; pool water When the ozone concentration in the air is below 0.15mg/1, it is harmless to the human body. ◆Because ozone will attenuate in both water and air, and the half-life is short, so there will be no accumulation of ozone concentration; Play a disinfection role; ◆Use an ozone concentration monitor to measure the ozone content in the pool water and output signals to control the amount of ozone generated to ensure that the ozone concentration in the pool water does not exceed the set value for protection; Water can reach every point of the pool within 5 minutes, and the half-life of ozone is 20 minutes. When the concentration of ozone in water is 0.05mg/1, the bactericidal effect can be guaranteed; There is no report of death from ozone poisoning, but as many as 100,000 people died from chlorine poisoning.

Toxicology experiments show that at the same dose, the toxicity of ozone is lower than that of chlorine. It is difficult to understand that ozone with low toxicity and good bactericidal effect is removed and chlorine with high toxicity and poor bactericidal effect is added. 3. The swimming pool adopts the characteristics of ozone disinfection ◆The swimming pool should adopt the countercurrent circulation water distribution method. In this case, the incoming water containing ozone can be quickly mixed with the pool water, and it is possible not to add other chemicals, such as chlorine, flocculants, In actual operation, only the swimming pool manager can really appreciate the other benefits brought by the countercurrent water distribution method, such as easy removal of floating objects on the water surface, water saving and energy saving, and less workload for pool cleaning. ◆When swimming pool water is disinfected with ozone, it is not necessary and should not remove residual ozone. The residual ozone in the water will not reach a concentration that will cause harm to people.

◆When countercurrent circulation is used without ozone removal, if the pool water can be circulated according to the specification, under normal passenger flow, when the ozone dosage is 0.5mg/l, it can meet the disinfection needs, but a margin should be considered in the design . ◆The ORP controller can be used to monitor the ozone concentration in the water. When the ozone concentration in the pool water backwater is high (greater than 0.10ppm), the ozone generator will be turned off to prevent the ozone concentration in the air from exceeding the standard (0.1ppm). ◆ Filtration plays a decisive role in water quality. When the particle size of the filter material is 0.45-0.8mm, if the thickness of the filter layer (excluding the thickness of the supporting layer) can reach 900mm, the dosage of ozone can be reduced. Too much ozone cannot guarantee water quality.

◆If you want to add chlorine preparations, when the residual chlorine reaches 0.1ppm, it can meet the disinfection needs. 4. Ozone is better than chlorine preparations in swimming pool water sterilization and disinfection ◆After adding chlorine preparations, it will inevitably lead to changes in the pH value of the water, making people feel uncomfortable, so it is necessary to add alkaline or acidic substances to neutralize them. Ozone is a neutral substance and will not cause such problems.

◆Ozone can ensure the stability of water quality during high passenger flow and high temperature seasons. When high temperature and high passenger flow occur, the water quality is often poor. At this time, if chlorine preparations are used, a large amount must be added, which will bring a series of side effects. Such as changes in pH value, irritation to the respiratory tract and human body, etc.; and a large amount of ozone has no such side effects. ◆The use of an ozone generator can greatly reduce the difficulty of management and operation of the water treatment process. At the same time, the ozone generator has a high level of safety, while chlorine preparations are dangerous during transportation, storage and use. ◆Ozone can decompose organic matter in water and has a micro-flocculation effect, so under normal passenger flow, no flocculant is required.

◆Under certain conditions of use, such as countercurrent circulation and no activated carbon filter tank, ozone can be used as the only agent for water treatment, without adding chlorine preparations, flocculants, and pH regulators. Guangdong Boying Environmental Protection Equipment Co., Ltd. is a professional company specializing in R&D, production and sales of environmental protection water treatment equipment. The company's products are mainly used in swimming pool filtration systems, reclaimed water reuse systems, rainwater collection systems, ultrafiltration systems, building water supply and drainage and HVAC system, the main products are: stainless steel sand cylinder, hair collector, ultraviolet sterilizer, carbon steel and stainless steel multi-media filter, reverse osmosis pure water unit, vacuum degasser, automatic water supply and exhaust constant pressure device , Pressure expansion tanks, various water supply equipment, various water treatment equipment, etc. National hotline: 4008-335-020 Poolking is the best swimming pool equipment manufacturer and supplier in China. Poolking exists to provide the highest quality swimming pool equipment while offering competitive pricing..

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