Guangxi Nuclear Power Project
Guangxi Nuclear Power Project

Guangxi Nuclear Power Project

The self-cleaning filter is selected for ultrafiltration pretreatment, with a precision range generally between 50-150um, tailored according to the specific actual working conditions required by various membrane manufacturers. Currently, self-cleaning filters used in ultrafiltration pretreatment systems are relatively mature products, but there may be differences in the selection of drainage valves in some practical cases. In this system, solenoid valves are still widely used, characterized by high cost-effectiveness; additionally, the drainage water volume of solenoid valves is smaller compared to ball valves and butterfly valves. However, it is recommended to use solenoid diaphragm valves, as their operation and usage are very stable.

 Dirty water enters from the filter inlet, first passing through the coarse filter screen to remove larger particles, then reaching the fine filter screen. During filtration, the fine filter screen gradually accumulates dirt and impurities from the water, forming a filter impurity layer. Because the impurity layer accumulates on the inside of the fine filter screen, a pressure difference forms on the inside and outside of the fine filter screen. When the pressure difference of the self-cleaning filter reaches the preset value, a switch signal is sent to the control box PLC system to start a cleaning cycle. Cleaning process: The cleaning mechanism of the fully automatic negative pressure suction filter is a stainless steel spiral up-and-down moving suction scanner. It is hollow in structure, with several suction nozzles vertically distributed at certain distances along its axis. The inside of the suction scanner communicates with the 3” drain valve. When the drain valve opens, the pressure difference between the internal water pressure of the filter and the external atmospheric pressure generates strong suction at each suction nozzle. At each suction nozzle, water flows rapidly from outside to inside in reverse, washing impurities attached to the inner wall of the filter screen into the suction nozzle, through the hollow shaft of the suction scanner, then discharged through the drain valve, completing the cleaning process which takes about 30-60 seconds. At this time, the pressure difference returns to normal, the cleaning process ends, and filtration resumes. During cleaning, the system continues to flow.

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Power generation

Jinan Fumide Environmental Protection Technology Co., Ltd.

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131 5317 1310

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The self-cleaning filter is selected for ultrafiltration pretreatment, with a precision range generally between 50-150um, tailored according to the specific actual working conditions required by various membrane manufacturers. Currently, self-cleaning filters used in ultrafiltration pretreatment systems are relatively mature products, but there may be differences in the selection of drainage valves in some practical cases. In this system, solenoid valves are still widely used, characterized by high cost-effectiveness; additionally, the drainage water volume of solenoid valves is smaller compared to ball valves and butterfly valves. However, it is recommended to use solenoid diaphragm valves, as their operation and usage are very stable.

 Dirty water enters from the filter inlet, first passing through the coarse filter screen to remove larger particles, then reaching the fine filter screen. During filtration, the fine filter screen gradually accumulates dirt and impurities from the water, forming a filter impurity layer. Because the impurity layer accumulates on the inside of the fine filter screen, a pressure difference forms on the inside and outside of the fine filter screen. When the pressure difference of the self-cleaning filter reaches the preset value, a switch signal is sent to the control box PLC system to start a cleaning cycle. Cleaning process: The cleaning mechanism of the fully automatic negative pressure suction filter is a stainless steel spiral up-and-down moving suction scanner. It is hollow in structure, with several suction nozzles vertically distributed at certain distances along its axis. The inside of the suction scanner communicates with the 3” drain valve. When the drain valve opens, the pressure difference between the internal water pressure of the filter and the external atmospheric pressure generates strong suction at each suction nozzle. At each suction nozzle, water flows rapidly from outside to inside in reverse, washing impurities attached to the inner wall of the filter screen into the suction nozzle, through the hollow shaft of the suction scanner, then discharged through the drain valve, completing the cleaning process which takes about 30-60 seconds. At this time, the pressure difference returns to normal, the cleaning process ends, and filtration resumes. During cleaning, the system continues to flow.

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