- 产品名称:
- 气水反冲洗长柄滤头
- 品牌:
- 前程
- 型号:
- QC-BAF
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During air-water backwashing, as long as the air pressure is greater than the backwash water pressure, the air will gather under the filter plate to form an air cushion layer And gradually thicken. When the water surface gradually drops to the air inlet hole on the long-handled tube, the air begins to flow into the long-handled tube through the small hole, and then enters the filter layer through the filter cap. If the amount of air flowing in is equal to the amount of air flowing away through the small hole When the air volumes are equal, the water surface will stop falling to form a stable air cushion; if the air intake volume is large, the small holes are not enough to discharge the incoming air volume, and the water surface will continue to fall to the slit at the bottom of the filter handle. At this time, the remaining The air flows into the filter handle through the slit. Since the slit is long, its air inlet area increases as the water level decreases, and the total area is much larger than the air inlet holes, so it is not only enough to drain away the unused air in the small holes. The amount of air exhausted can also control the thickness of the air cushion layer so that the air cushion layer cannot reach the bottom of the long-handled tube. The air and water pass through the filter handle and emerge from the slit on the filter cap, stirring the filter material and strengthening the filter. The collision effect of the material makes it difficult to form mud balls in the filter material, and the dirt is easily washed away, thereby achieving the purpose of flushing.
Backwashing long handle filter head_The main backwashing methods include: air-water backwash There are three types of flushing, air-water mixed backwashing and water backwashing with surface flushing at the same time. Due to the mixing of air and water, the collision of the filter material during the backwashing process is strengthened, which increases the shear force of the water flow and eliminates the formation of water in the filter layer. The mud ball greatly improves the backwashing effect and saves the amount of flushing water; especially the use of long-handled filter heads for water and gas distribution, the effect is more significant, so the gas-water backwashing technology is quickly applied in our country. But because of its impact on The construction and operation requirements are very strict, and some problems such as pulse, uneven air flushing, sand running, etc. have appeared.
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