The Automatic self-cleaning filter is a water treatment equipment mainly composed of the major electromotor, filter cap, water distributor, and pneumatic-hydraulic backwashing devices, which works in either of the two forms: filtration and backwashing.
The raw water runs through the purifying pump to the incoming pipehttp://www.uvcsterilizer.com/product/automatic-self-cleaning-filter-control-box-separate.html of the filter, then through the central pipe to the water-distributor atop the device. The water is evenly distributed and filtered though a layer. The filter layer is composed of two layers, the upper coarse smokeless coal bars the passage of large particles, while the small ones go to the next layer of tiny quartz sand through a smokeless coal filter. Owing to the small diameter of the quartz, small particles will remain attached to the surface of the second layer. The coarse sand supports the filter system and distributes water, giving full expression to the function of each layer and the capacity of filtration. Filtered water runs through the filter cap to the purifying area at the bottom, and runs through the outletting pipe as the end of the whole process of filtration.
If the pressure difference between the outletting and incoming pipe owing to the massive accumulation of sludge reaches 0.05Mpa or the time span of performance has exceeded 24 hours, there’s been too much accumulation of impurity and a drop in the quality of outletting water, thus necessitating backwashing.
During the process of backwashing, the incoming valve of the raw water and the outlet valve of the filtered water should be closed, and the drainage valve of the backwashing system should be kept open until no water comes out. Then , automatic self-cleaning filter release water to make the liquid level fall below the trumpet mouth when the system is supposed to be under a common pressure.
Open the incoming valve of the backwashing system, and the air runs through the incoming pipe to the under part of the device. Owing to the difference between the density of air and that of water, a pneumatic layer is thus placed below the under part of pore boards. Residual water in the device, impelled by the difference in pneumatic pressure, runs through the filter cap, which scatters water evenly, to the bottom of the filter layer upwards for automatic flushing. Owing to a lack of pore or groove in the filter bar, when the pneumatic layer reaches a certain height, air will be pumped through the upper pore to air-rinse the filtering substances. When the thickness of the pneumatic layer reaches a set limit, the filtering substance, given the intense impact of the air, mutually rubs against each other. When the time span of pneumatic flushing reaches a set value, the incoming valve should be closed and the incoming valve of the backwashing system be opened to start the flushing of filtered water. The flushing water should be drained from the drainage pipe. This should be followed by a positive-pressure flushing of the device through the incoming valve. The water should come out of the positive drainage pipe, until the outletting water becomes transparent. This concludes the process of backwashing and makes the device function normally.
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