The filter bag cleaning and reuse technology is applied rapid sand filters to the operation of the water treatment system of the Jisan Coal Mine of Yankuang Group, and a special person is designated to be responsible for the cleaning and reuse of the filter bag, and tracks and investigates the use of the reuse filter bag. Four groups of samples were randomly sampled, and the initial pressure difference of the security filter, the working end pressure difference before opening the tank and replacing the filter bag, and the use time of the filter bag were statistically analyzed, and the average use time of the filter bag was 46 hours, and the pressure growth rate was 0.03 MPa/h. Under the same hydraulic conditions, the new filter bag has a service time of 53 hours, a pressure growth rate of 0.029 MPa/h, the service life of the reuse filter bag is relatively close to that of the new filter bag, and its filtration performance on mine water is basically the same, and the field application is good.
The fiber ball filter media is made of fiber balls, which are resistant to corrosion, high elasticity, wear resistance and variable voids. In the process of work, due to the working pressure of the filter, the impact of the water flow lamella clarifer and the weight factor of the filter material itself, the void rate of the filter layer gradually becomes smaller from top to bottom along the direction of the water flow, forming an ideal filter layer distribution law of loose upper part and dense lower part. In addition, the fiber ball has a large specific surface area, and at the same time, its void rate is measured to be about 96%, which enables it to give full play to the ability of the filter material to intercept dirt and adsorb and intercept solid suspended particles in raw water. Fiber balls have the characteristics of not being easy to dip oil due to their material characteristics, so it is easier to backwash, which also reduces the amount of backwashing water; It also has high chemical stability, when the raw water contains organic matter to pollute the fiber ball filter material, it can be regenerated by chemical cleaning, which has strong practicality.
Security filter polypropylene filter bag cleaning Lamella Plate Settler and reuse technology application effect is better, can effectively remove the impurities attached to the filter bag, restore and improve its filtration performance, filter bag after cleaning and renewing, impurity retention capacity and service life is relatively close to the new filter bag, can completely replace the new filter bag for recycling. At the same time, the input cost of this technology is not high, the on-site operation is simple, there is no need to purchase expensive instruments and agents, the technical cost is much lower than the cost of purchasing a new filter bag, which solves the problem of large filter bag lamella tube consumption and low service life, and on the basis of ensuring the quality of the effluent, it saves the operating cost of water treatment and realizes a new breakthrough in cost-saving and consumption-saving technology.