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The structure and facilities of the pool's return water system
Published:
2021/01/23
Structure and facilities of the pool surface return water system -Swimming pool equipment-
Structure and facilities of the pool bottom return water system: bottom drain
1. Return water methods of skimmer plus bottom drain, and overflow channel plus bottom drain -Swimming pool equipment-
Skimmers are used for small and medium-sized swimming pools. Generally, when the water surface area of the swimming pool ≦ 350 ㎡, a skimmer is used. 25 ㎡— 50 ㎡ of water surface area uses one skimmer, and a swimming pool should not have less than 2 skimmers. Outdoor pools are installed on the leeward side (north wall pool) during the swimming season, 50% to 70% Water flow can be treated by the skimmer. Special treatment can be done for different pollution conditions, 0 — 100% Special situations after skimmer treatment do occur. Skimmers treat less than 1kg/l and equal to 1kg/l impurities, while bottom drains treat impurities greater than 1kg/l and equal to 1kg/l This circulation method is scientific because it treats pollutants of different densities. -Swimming pool equipment-
Overflow channels are used for physical treatment in medium and large swimming pools and must be equipped with a balancing water tank, 70% — 100% Water flow can be treated through the overflow channel. Water can overflow from all sides of the pool or from the two long sides of the pool. The bottom drain also participates in the circulation and filtration. The function of the overflow channel is the same as the skimmer, treating impurities with a density less than 1kg/l and equal to 1kg/l impurities, while bottom drains treat impurities greater than 1kg/l and equal to 1kg/l This circulation method treats pollutants of different densities, making it scientific.
Note: The balancing water tank is not built and installed in the equipment room, but is built of concrete next to the swimming pool, allowing for convenient sludge removal and chemical treatment. In a static state, the surface of the swimming pool water and the surface of the balancing water tank are at the same level below ground. After the system starts operating, the circulation pump draws water from the balancing water tank, and after passing through the circulation, filtration, heating, and disinfection system, it replenishes the swimming pool. The water level in the balancing water tank decreases, while the water level in the swimming pool rises, creating a water level difference, allowing water to return through the overflow channel, allowing impurities with a density less than 1kg/l and equal to 1kg/l to flow. At this time, the bottom drain can work simultaneously, allowing impurities with a density greater than 1kg/l and equal to 1kg/l to flow. It should be noted that if water is supplied from the bottom of the pool, the so-called "short-circuiting" phenomenon can be ignored, because the water entering the swimming pool from the water inlet immediately mixes with the untreated pool water, and the flow of mixed water containing dirty water back to the bottom drain cannot be called "short-circuiting". -Swimming pool equipment-
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