Quartz sand filter is a commonly used equipment in the water treatment industry at present, with low price of filter material and good filtering effect. The users who know it know that if the equipment maintains a good filtering effect, it is necessary to perform backwashing on a regular basis. What is the reason? Let's take a brief look at it with me.
To understand why the quartz sand filter needs to be backwashed, then we must start from the function of the equipment. The quartz sand mainly removes the suspended solids, sediment, organic matter and other impurities in the water, mainly through the retention of the quartz sand. Therefore, after the filter works for a period of time, there are many fine particles in the gaps of the sand, such as mud, organic matter and other impurities. If backwashing is not performed, the sediment will block the passage of water and reduce the pressure of the filtered water, so that the The flow rate is also reduced, which not only wastes valuable energy (electricity, the pump provides power), but also reduces the flow rate of the filtration, which cannot achieve the effect of water effluent. Therefore, backwashing should be performed after a period of use.
Quartz sand filter has two backwashing methods, one is gas-water backwashing, and the other is water backwashing. Air-water backwashing is to use the air bubbles and the quartz sand filter material to rub against each other, and then to use the friction between the particles of the quartz sand filter material and the particles, that is, to use the quartz sand filter material and the water to wash. The friction force and the interaction of the four increase the effect of backwashing to a large extent, so that the quartz sand filter material after backwashing can be used.
Water backwashing mainly uses the friction between the quartz sand filter material and the water and the friction between the sand and the sand to wash away the impurities in the water. It is generally used in small filters, and the amount of backwashing water is generally 2 times the operation. The characteristics of flow rate are: no need to provide air source, large water consumption and simple operation.
It turns out that the quartz sand filter needs to be backwashed regularly because after long-term use, some impurities will remain in the filter material, which will not only affect the quality of the effluent filtered by the equipment, but also reduce the output of the equipment and greatly reduce the work efficiency.
The above is all the content about the quartz sand filter that Xiaobian introduced to you, I hope it can be helpful to you.
