Talking about the filter accuracy of self-cleaning filter:
Self-cleaning filter is mainly used for purifying water. It can be used in water filtration of industries, agriculture, power, electronics, medicine, food, printing and dyeing, construction, iron and steel, metallurgy, papermaking, coal mines, swimming pools, landscapes, greening, etc. Water treatment, water reformation Especially in the field of microfiltration with high water quality requirements, the self-cleaning filter has many functions to remove sediment, clay, rust, suspended solids, algae, biological slime, corrosion products, macromolecular bacteria, Organic matter and other fine particles and other impurities, to achieve the purpose of water purification.
Non-stop water supply during backflushing of the self-cleaning filter is achieved in such a way that the entire backwash is performed at every point of the suction nozzle net filter. During backwashing, only a small local pressure change between the suction nozzle and the fine filter screen occurs, and the collector and hydraulic cylinder actions do not affect the normal water supply. At the same time, the amount of water consumed during backflushing is very small, with a flow rate of 300m3/h. For example: the backwash flow is 35-40m3/h, the backwash time is 7-15 seconds, and the backwash volume is 80-160L.
Self-cleaning filter filtration:
The minimum filtration accuracy is 5 μm. Through the experiment, we can see the filtration performance of the self-cleaning filter with the filtration characteristic curve of the 50 μm fine mesh:
The removal efficiency is 100% for suspended solids greater than 50 microns and 50% for suspended solids less than 50 microns. The filter-based main filter ensures that 100% removes more than 50 microns of suspended solids, and the auxiliary filter based filter cake has the advantage of removing fine particles.
The backwashing of the self-cleaning filter is achieved by the opening of the hydraulic valve and the movement of the cylinder piston, and these are controlled by the backwash controller. The backwash controller can accurately control the hydraulic valve and the hydraulic cylinder according to the pressure difference transmitted from the inlet and the outlet of the filter, and the power of the controller comes from the pressure of the pipeline itself.
Three common failures of self-cleaning filters:
Self-cleaning filter As a new type of filter, the tap water precise filter has many advantages such as automatic cleaning, automatic blowdown, constant flow of cleaning, and high degree of automation, so it has quite a wide range of applications in many fields, such as self-cleaning filters. Faults need to be resolved in time to ensure their normal operation.
1. Leaking from self-cleaning filter Leaking from the self-cleaning filter will generally appear on the driveshaft portion of the filter (water leakage from the welded part of the barrel and flange is not within this range). There are basically two causes for this problem. First, the material or specifications of the shaft sealing ring do not meet the requirements, so replace the sealing ring that meets the requirements. The second reason is that the seal ring wears out after a long time operation, which causes the seal between the drive shaft and the filter body to be leaky. In this case, replacing the corresponding seal ring can solve the problem.
2. Self-cleaning filter automatic drain valve fault self-cleaning filter After a long period of time will appear automatic drain valve failure, the specific performance of the filter is automatically cleaned when the sewage valve does not act or the sewage valve will not open has been Can not be closed, the emergence of this problem of self-cleaning filter manufacturers generally use domestic solenoid valve as a drain valve, this solenoid valve is a pilot type, first by the solenoid to open the pilot hole, and then rely on the pressure of water in the system Open the diaphragm to open the valve. Since the sewage contains many impurities, it is very easy to plug the pilot hole, causing the solenoid valve to not act or to close after opening. Self-cleaning filter selection of electric ball valve or imported water solenoid valve as a sewage valve completely solves the problem of the common solenoid valve as the self-cleaning filter automatic drain valve is easy to fail.
3. Automatic cleaning control system failure In the process of using the self-cleaning filter, it may be found that the self-cleaning filter often causes the increase of the amount of cleaning water and the shortening of the filter life. This problem is caused by the failure of the automatic control system of the filter or Parameter settings caused. This is mainly due to differential pressure controller cleaning differential pressure and cleaning time settings. Frequent start-up of the filter cleaning system may generally be resolved by setting a larger differential pressure range or adjusting the cleaning time of the control system.
Self-cleaning filter is mainly used for purifying water. It can be used in water filtration of industries, agriculture, power, electronics, medicine, food, printing and dyeing, construction, iron and steel, metallurgy, papermaking, coal mines, swimming pools, landscapes, greening, etc. Water treatment, water reformation Especially in the field of microfiltration with high water quality requirements, the self-cleaning filter has many functions to remove sediment, clay, rust, suspended solids, algae, biological slime, corrosion products, macromolecular bacteria, Organic matter and other fine particles and other impurities, to achieve the purpose of water purification.
Non-stop water supply during backflushing of the self-cleaning filter is achieved in such a way that the entire backwash is performed at every point of the suction nozzle net filter. During backwashing, only a small local pressure change between the suction nozzle and the fine filter screen occurs, and the collector and hydraulic cylinder actions do not affect the normal water supply. At the same time, the amount of water consumed during backflushing is very small, with a flow rate of 300m3/h. For example: the backwash flow is 35-40m3/h, the backwash time is 7-15 seconds, and the backwash volume is 80-160L.
Self-cleaning filter filtration:
The minimum filtration accuracy is 5 μm. Through the experiment, we can see the filtration performance of the self-cleaning filter with the filtration characteristic curve of the 50 μm fine mesh:
The removal efficiency is 100% for suspended solids greater than 50 microns and 50% for suspended solids less than 50 microns. The filter-based main filter ensures that 100% removes more than 50 microns of suspended solids, and the auxiliary filter based filter cake has the advantage of removing fine particles.
The backwashing of the self-cleaning filter is achieved by the opening of the hydraulic valve and the movement of the cylinder piston, and these are controlled by the backwash controller. The backwash controller can accurately control the hydraulic valve and the hydraulic cylinder according to the pressure difference transmitted from the inlet and the outlet of the filter, and the power of the controller comes from the pressure of the pipeline itself.
Three common failures of self-cleaning filters:
Self-cleaning filter As a new type of filter, the tap water precise filter has many advantages such as automatic cleaning, automatic blowdown, constant flow of cleaning, and high degree of automation, so it has quite a wide range of applications in many fields, such as self-cleaning filters. Faults need to be resolved in time to ensure their normal operation.
1. Leaking from self-cleaning filter Leaking from the self-cleaning filter will generally appear on the driveshaft portion of the filter (water leakage from the welded part of the barrel and flange is not within this range). There are basically two causes for this problem. First, the material or specifications of the shaft sealing ring do not meet the requirements, so replace the sealing ring that meets the requirements. The second reason is that the seal ring wears out after a long time operation, which causes the seal between the drive shaft and the filter body to be leaky. In this case, replacing the corresponding seal ring can solve the problem.
2. Self-cleaning filter automatic drain valve fault self-cleaning filter After a long period of time will appear automatic drain valve failure, the specific performance of the filter is automatically cleaned when the sewage valve does not act or the sewage valve will not open has been Can not be closed, the emergence of this problem of self-cleaning filter manufacturers generally use domestic solenoid valve as a drain valve, this solenoid valve is a pilot type, first by the solenoid to open the pilot hole, and then rely on the pressure of water in the system Open the diaphragm to open the valve. Since the sewage contains many impurities, it is very easy to plug the pilot hole, causing the solenoid valve to not act or to close after opening. Self-cleaning filter selection of electric ball valve or imported water solenoid valve as a sewage valve completely solves the problem of the common solenoid valve as the self-cleaning filter automatic drain valve is easy to fail.
3. Automatic cleaning control system failure In the process of using the self-cleaning filter, it may be found that the self-cleaning filter often causes the increase of the amount of cleaning water and the shortening of the filter life. This problem is caused by the failure of the automatic control system of the filter or Parameter settings caused. This is mainly due to differential pressure controller cleaning differential pressure and cleaning time settings. Frequent start-up of the filter cleaning system may generally be resolved by setting a larger differential pressure range or adjusting the cleaning time of the control system.
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