Electrocatalytic electrode material supplier
Generally speaking, the electrode scaling problem caused by concentration polarization can be eliminated and reduced by the following methods:
1. Rearrangement of electrode on a regular basis, and the ions migration direction change, so that the shade room also rearrangement of accordingly, according to the actual situation, generally 2-8 hours rearrangement of electrode, in recent years, frequent use automatic rearrangement of electrodes at home and abroad, about 15 to 30 minutes, so that even a slight precipitate can effectively remove, but frequent extreme requirements about the quality of the electrode is higher, The electrode loss is large, to choose high quality, strong corrosion resistance of electrocatalytic electrode materials.
2.Pickling method: there is always a small amount of precipitation scale produced in the operation of the electrodialysis device, especially in areas with poor water quality. After accumulating to a certain extent, even the method of replacing the electrode can not be completely removed. At this time, pickling treatment is required. According to the situation, regular pickling treatment is a simple and effective method to eliminate precipitation without dismantling the equipment. Cycle according to the actual situation and generally use 1%~2% hydrochloric acid cycle cleaning.
3.Limit current method: strictly control the working current of the electrodialysis device, and keep it always lower than the limit current when polarization is generated, so as to avoid the generation of polarization.
4.Washing method: after a long time of operation, the internal scaling situation is more serious, can not be eliminated by the above methods, the device will be disassembled, the partition and diaphragm cleaning.
5.In order to reduce precipitation and scaling, it is also important to strengthen the treatment of raw water. Suspend solids, some colloidal substances and organic impurities in raw water can prevent or reduce precipitation and scaling. Pretreatment can also be done to remove the hardness of raw water, which can effectively prevent the generation of scaling.
