The frequency of filter membrane cleaning is related to the perfection of pretreatment measures. The more complete the pretreatment measures, the longer the cleaning interval; conversely, the higher the cleaning frequency.
1. The chemical cleaning cycle depends on the degree of membrane fouling.
2. The common cleaning liquid formula is as follows:
Alkali washing solution: 0.1 ~ 0.5% NaOH solution. Acid pickling solution: 0.2% HCI or 1% citric acid solution (selected according to the actual situation). Oxidant solution: 500 ~ 1000mg / L (effective chlorine concentration) NaClO solution.
3. According to the instructions of the cleaning solution above, prepare the cleaning solution according to the proportion in the chemical cleaning box, and mix thoroughly to control the pH and temperature.
4. Reduce the liquid level in the membrane tank to the lowest level, or drain the water in the membrane tank.
5. In the way of backwash, the chemical cleaning solution penetrates the membrane from the inside of the hollow fiber under the pressure of the cleaning liquid pump and accumulates in the membrane tank until the membrane module is flooded.
6. Let the cleaning solution soak the membrane filaments in the membrane tank for 2 ~ 4 hours, while soaking, it can be aerated to enhance the cleaning effect.
2. The common cleaning liquid formula is as follows:
Alkali washing solution: 0.1 ~ 0.5% NaOH solution. Acid pickling solution: 0.2% HCI or 1% citric acid solution (selected according to the actual situation). Oxidant solution: 500 ~ 1000mg / L (effective chlorine concentration) NaClO solution.
3. According to the instructions of the cleaning solution above, prepare the cleaning solution according to the proportion in the chemical cleaning box, and mix thoroughly to control the pH and temperature.
4. Reduce the liquid level in the membrane tank to the lowest level, or drain the water in the membrane tank.
5. In the way of backwash, the chemical cleaning solution penetrates the membrane from the inside of the hollow fiber under the pressure of the cleaning liquid pump and accumulates in the membrane tank until the membrane module is flooded.
6. Let the cleaning solution soak the membrane filaments in the membrane tank for 2 ~ 4 hours, while soaking, it can be aerated to enhance the cleaning effect.
#10 Steps To Clean Membrane Filter#
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