How to maintain water quality without circulating filtration system?

Generally, drugs filtered by sand pools are used for swimming pool water treatment, which only plays an auxiliary role. Drugs can solidify some impurities such as dirty things in the swimming pool and then filter them out through the sand trough. Through the processes of sedimentation, filtration, disinfection and heating, the water quality is guaranteed to meet the standard. It is difficult for viruses and bacteria to survive in qualified pool water. Sand box filtration principle: Quartz sand of a certain scale is generally placed in the sand box, and the size and specifications of quartz sand are different within a certain range. In the sand tank, quartz sand is arranged from top to bottom and from small to large. During normal filtration, water enters from the upper sand and comes out from the lower sand. When the water flows through the filter layer from above, some solid suspended substances in the water enter the tiny pores formed by the upper filter material, and are intercepted by the surface of the filter material through adsorption and mechanical retention. At the same time, these intercepted suspended substances overlap and bridge, just like forming a film on the surface of the filter layer, and continue to filter suspended substances in water. This is called membrane filtration of the surface layer of filter material. This kind of filtration exists not only on the surface of the filter layer, but also when water enters the intermediate filter layer. In order to distinguish it from surface filtration, this kind of filtration is called osmotic filtration. In addition, because the sand grains are closely arranged with each other, when the suspended particles in the water flow through the winding channel in the sand layer, they will have more opportunities and time to collide and contact with the surface of the filter material, so the suspended particles in the water attach to the flocs on the surface of the sand layer and contact coagulation occurs. To sum up, sand box filtration is to further purify water through membrane filtration, osmotic filtration and contact filtration. Principle of buried circulating filtration: The buried circulating filtration system is an intelligent circulating filtration system integrating pump room, filtration, dosing and disinfection, which has changed the traditional sand pool filtration mode. It is suitable for public swimming pools in China, Australia and other countries. It is a filtration system specially used for large public swimming pools and competition swimming pools with a size of over 500 cubic meters. The principle of wall-mounted and embedded type is the same as that of buried type, but the installation method is different. Integrated swimming pool equipment is a common, hot-selling and controversial small equipment in the market at present. There is no clear definition agreed by all parties. Generally, it refers to swimming pool equipment with the functions of circulating filtration, underwater lighting, disinfection and drug administration. According to different brands and manufacturers, it often includes entertainment functions such as massage and counter-current swimming. [Edit this paragraph] Classification At present, there are two main types of integrated swimming pool equipment, one is called wall-mounted and the other is called underground. Among them, wall hanging is more common, mainly used in small swimming pools. Most brands of products are of this type, such as De Gaulle, Aegean Sea and Water Whale. Buried products combine the advantages of traditional methods and wall-mounted methods, and have a wide range of applications, which are suitable for the renovation of old swimming pools and the construction of new competition swimming pools and public swimming pools. At present, * * * is the representative. [1][ Edit this paragraph] Featured products are all made of selected materials and injected with disposable molds. It has the functions of anti-corrosion, anti-scratch, anti-leakage and anti-tearing. 1) high filtration accuracy: the accuracy is as high as 5 microns. 2) Save space: no operation room is needed. Replace the operating room with PP shell, because the land price is too high today, and our equipment will be your best choice. 3) No pipeline: Our equipment does not need any pipeline, which can solve the trouble caused by pipeline rupture. 4) Automatic dosing device: Our equipment is specially equipped with automatic dosing device. All you have to do is put the medicine into the medicine feeder, and the medicine will automatically dissolve in the swimming pool. If you feel that there is too much medicine, you can close the dosing valve yourself. 5) Sewage suction device: Our equipment has the function of one machine and two rows. The sewage at the bottom of the pool can be sucked into the filter bag through the motor in the equipment, or directly discharged through the sewage pipe fittings through another set of sewage discharge devices. 6) Massage device: Our equipment is equipped with a torrent massage nozzle, which has the effect of a jacuzzi. The auxiliary water outlet can also cooperate with the torrent nozzle to adjust the intensity of water flow. At the same time, the bubble adjustment switch adds more fun to the swimming pool. 7) Multifunctional: Our equipment has been equipped with underwater lights, stainless steel escalators and other equipment, and similar products are no longer needed. 8) Environmental protection and good quality: We have been engaged in the research, development and production of this equipment for more than 65,438+00 years, and have successfully exported it to India, Singapore, China, Taiwan Province Province, France, etc. We have more than 800 sets of engineering samples at home and abroad for customers' reference. At the same time, our products have passed the international CE certification and the inspection of Guangzhou Technical Supervision Bureau. 9) Quality guarantee: We provide the whole machine with a 2-year warranty. 10) professional technical support: Our senior R&D personnel and technicians have at least 22 years of rich experience in related fields, so we are confident enough to assure you that when you encounter related problems, we can give you the most sincere help and advice! [Edit this paragraph] Related problems and solutions are normal 0 7.8 lb 0 2 fake Microsoft Internet Explorer 4 I. Selection of circulation mode There are two kinds of circulation modes commonly used in swimming pools, one is downstream and the other is countercurrent. Because of the different technical characteristics of the two modes, in practical engineering, the correct choice must be made in combination with the use of swimming pools, and mechanical copying should be avoided. The downstream adopts the circulation mode of water inlet on both sides of the pond wall and backwater at the deep end of the pond bottom. Specifically, a water inlet is arranged in the center of the pool wall directly below each lane line on both sides, and a plurality of water inlets are arranged at the deepest end of the pool bottom, and the number of water inlets is twice that of the lane lines, and the number of water inlets is equal to that of the lane lines. In fact, downstream is to simulate the movement of natural rivers, and the treated water pushes the used water (that is, new water pushes old water) into the water treatment equipment, thus avoiding the mixing of new water and old water. The advantages of adopting parallel flow are as follows: ① the pipeline layout is simple, there is no need to set up redundant equipment such as balance water tank, which is difficult to manage and maintain and saves investment cost; (2) No additional circulating water is needed, and the water treatment system has high efficiency and low operating cost; ③ The overflow of the overflow ditch is not reused, and the floating objects on the surface of the pool water can be discharged out of the pool through the overflow ditch at the edge of the pool, thus fundamentally eliminating the secondary pollution source. The main disadvantage of adopting parallel flow is that the overall water quality (water temperature, residual chlorine and turbidity) of swimming pool is not as uniform as that of countercurrent because of the small number of inlets and outlets; The counter-current type adopts the circulation mode of water inflow at the bottom of the pool and overflow and backwater at the bank of the pool. The specific method is to set a water distribution outlet every 3 meters on the projection line of each lane line at the bottom of the pool, and at the same time set overflow ditches on both sides of the pool bottom. In fact, it adopts the way of upward water distribution, that is, from the bottom of the pool to the surface, and finally back to the water treatment room through the overflow tank on the bank of the pool. The advantages of adopting downstream flow are: ① the overall water quality (water temperature, residual chlorine and turbidity) of swimming pool is more uniform than that of downstream flow; (2) Floating objects near the pool can be collected by the overflow pool on the bank of the pool and returned to the water treatment system. Disadvantages of adopting parallel flow: ① the pipeline layout is very complicated, and it needs to set up supporting equipment such as balance water tank, which has a large workload of management and maintenance and the investment cost is much higher than that of parallel flow; (2) The water on the edge of the pool returns to the water treatment machine room through the overflow pool on the bank of the pool (forming a short flow), while the water in the center of the pool must be circulated several times before returning to the water treatment machine room. When the number of swimmers increases sharply and the pollution of pool water increases, the water treatment efficiency is much lower than the downstream flow; ③ Swimmers often use the overflow tank as a sputum tank, which is very difficult to clean and causes serious secondary pollution to the pool water; Combining the advantages and disadvantages of parallel flow and countercurrent flow, we can draw the following conclusions: ① Star hotels, high-grade clubs and Olympic venues with few users have fewer pollution sources in the pool water, and users have higher requirements for the overall water quality uniformity of the swimming pool, so countercurrent circulation should be adopted; ② Social swimming pools with a large number of swimmers and open to the outside world have a large pollution content, and the goal of the water treatment system is to quickly reduce the overall swimming pool within a period. Second, how to solve the problem of excessive urea in swimming pools. The main pollution of public swimming pools open to the outside world is organic pollution such as urea, lysozyme and lysozyme, especially in primary and secondary swimming pools. However, the conventional pressure sand box and sand box filtration equipment can't remove these pollutions at all, so it is necessary to replenish 3%-5% fresh water to the swimming pool every day to dilute the concentration of organic pollution. Today, with the increasing shortage of water resources, this method must be banned. In the design of water treatment system, there are two ways to solve the problem of urea exceeding the standard: one is to configure ozone equipment in the water treatment system to generate strong O3 oxidant to fully oxidize and decompose the organic pollution in the pool water; Second, while maintaining the concentration of residual chlorine in the pond water, increase the concentration of dissolved oxygen in the pond water, so that hypochlorous acid in the pond water can excite new ecological oxygen [O] at any time, and utilize the strong oxidizing power of the new ecological oxygen [O] to oxidize the organic pollution in the pond water. Equipped with ozone equipment, it can not only remove urea, but also sterilize the pool water. The fly in the ointment is that the equipment investment and operation cost are high, and additional equipment such as reaction tank and adsorption tank are needed, which increases the difficulty of daily maintenance. Selection of filtration equipment There are many kinds of filtration equipment on the market at present, but there are mainly two forms, one is pressure equipment and the other is negative pressure equipment. The technical characteristics of the two are: the pressure-bearing equipment is usually the traditional sand tank and tank. The main problems of this equipment are: ① The machine room occupies a large area and the civil construction cost is high. The water treatment machine room of a standard pool usually needs 120m2-65433. (2) Large power consumption and high operating cost. The power consumption of the main circulating pump (Q=400 m3/h) of the standard pond water treatment system is usually 30 kW-40 kW; ③ The filter material is too simple, so in order to ensure the effluent effect, it must be equipped with dosing coagulation equipment, which will cause serious chemical pollution to the water body; ④ There are many valves, low degree of automation and complicated operation; ⑤ The metal material is lined with anti-corrosion lining, which has a short service life; The representative of negative pressure equipment is integrated equipment, and its market share has increased rapidly in recent years, and it has been adopted by dozens of swimming pools in Guangdong and Guangxi. Its main features are: ① No computer room; (2) Low power consumption and extremely low operating cost. The power consumption of a single main circulating water pump (Q=70 m3/h) in the standard pond water treatment system is usually only 2.2KW ~ 3kw(3). The filter material is graded with a filter layer composed of multiple layers of filter materials, which ensures the effluent effect without the need of dosing coagulation equipment and has no chemical pollution to the pond water. ④ The equipment has no valve and operation, and the degree of automation is extremely high; ⑤ All plastic material, no replacement parts, and its service life is several times that of pressure-bearing equipment. Compared with pressure equipment, negative pressure equipment has many advantages in technology, so if possible, negative pressure equipment should be adopted. Four. Selection of disinfection methods The principle of chlorine disinfection is that chlorine or chlorine preparations are hydrolyzed to generate hypochlorous acid, which is further decomposed to generate new ecological oxygen [O]. The strong oxidation of new ecological oxygen denatures protein and other substances on bacteria and viruses, thus killing pathogenic microorganisms. In the process of sterilization and virus killing, hypochlorous acid can not only act on the cell wall and virus shell, but also penetrate into bacteria (viruses) because of its small molecules and no charge, and react with organic polymers such as protein, nucleic acids and enzymes of bacteria (viruses) to kill pathogenic microorganisms. At the same time, chlorine ions produced by hypochlorous acid can also significantly change the osmotic pressure of bacteria and viruses, so that their cells lose their activity and die. Disinfectants for swimming pools must have the following characteristics: first, they do not cause harm to people; Second, the disinfection effect should be produced quickly; Third, the disinfection effect should be lasting; Fourth, the oxidation is greater; Fifth, there is no chroma and sludge residue in the water; Sixth, the dosing equipment is safe, convenient, durable and low in cost; Seventh, the price is low. Considering comprehensively, chlorine dioxide and sodium hypochlorite are the best choices. Sodium hypochlorite dosing equipment is low in price and operation cost, but it is easy to react with organic matter in pond water to generate a small amount of carcinogenic halide during disinfection. Comparatively speaking, chlorine dioxide does not produce carcinogens in the disinfection process, and the disinfection effect is better, but the investment cost of swimming pool equipment is slightly higher. Therefore, it is recommended to use chlorine dioxide for disinfection when conditions permit. Swimming pool water quality standard 2008-11-1217: 26: 28 1. The swimming pool water quality standard promulgated by China Ministry of Health and Sports Committee in July is as follows:1.5m3. Oxygen consumption shall not exceed 1.2mg/L 4, swimming residual chlorine shall be 0.4-0.6mg/l, combined residual chlorine shall be above 1.0mg/L 5. The total number of bacteria shall not exceed 18/L 6, urea shall not exceed 3.5mg/L 7, and the pool water temperature shall be 20. Second, the domestic public bathroom hygiene standard project, The temperature of sauna room, the illumination of carbon dioxide and carbon monoxide, the water temperature and the turbidity of bath water in dressing room should be 25℃ 0.15% ≤10mg/m3 ≥ 50lx-30-50℃ 0./kloc-0%-30lx30-50℃ ≤ 30℃. Class C odor unit must contain no odor, no obvious odor, no floating film, no accumulation of oil and other substances, transparency, m ≥1.2 0.5 water temperature,℃ not higher than the average monthly water temperature in the last ten years 2℃ 2) not higher than the average monthly water temperature in the last ten years 4℃, pH 6.5~8.5 dissolved oxygen, and permanganate index mg/L ≥ 5 4 3. (BOD 5 )mg/L ≤ 4 4 8 ammonia nitrogen 1), mg/l ≤ 0.50.5 nonionic oxygen, mg/L ≤ 0.02 0.02 0.2 nitrite nitrogen, and mg/l ≤ 0.150.15/. Mg/L ≤ 0.3 0.5 1.0 Total copper, mg/L ≤ 0.0 1 (bathing beach 0. 1) 0.0 1 (seawater 0.1) 0. 4. The chromaticity of the standard value in Hygienic Standard for Drinking Water (GB 5749-85) shall not exceed 15 degrees, and the turbidity of other colors shall not exceed 3 degrees. Under special circumstances, the smell shall not exceed 5 degrees, and the smell shall not be abnormal. Visible objects must not contain PH 6.5-8.5. The total number of bacteria is 100 /mL, the total coliform group is 3 /L, and the free residual chlorine in the water at the end of the pipe network should not be less than 0.05 mg/L, which meets the water quality standard of V. FINA.