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Do you know about electrolyzers? The real core technology of electrolytic air flotation machine



Source: sewage disposal Author: wushuichuli Date: 2019-11-07 15:38 Browse:

Electrolyzer

1. Device for electrolytic reaction. The electrolyzer is composed of cell body, anode and cathode, and most of them are separated by diaphragm.

2. According to the different electrolytes, it can be divided into three types: aqueous solution electrolyzer, molten salt electrolyzer and non-aqueous solution electrolyzer.

3. When the direct current passes through the electrolytic cell, oxidation reaction occurs at the interface between anode and solution, and reduction reaction occurs at the interface between cathode and solution, so as to produce the required products.

4. Optimizing the structure of electrolytic cell and selecting the electrode and diaphragm materials reasonably are the key to improve current efficiency, reduce cell voltage and save energy consumption.

 Electrolyzer

Unipolar and bipolar electrolyzers

1. Single pole electrolyzer adopts single electrode, and each cell is in parallel, with low voltage and high current

2. The two ends of bipolar electrolyzer are single electrode, which is connected with power supply, and induction double electrode is used in the middle; each cell is connected in series with low current and high voltage

3. Single electrode is easy to corrode and cause short circuit; even if double electrode is corroded, it will not be short circuited.

 Cell type monopole

Type of electrolyzer

The electrolyzers are mostly rectangular, and the water flow in the electrolyzer is of the baffled type, and there are two types of arrangement, namely, the reflux type and the tumbling type

1. Reflux type: the water flows in the horizontal direction. The reflux flow is long, the ions are easy to diffuse into the water, and the volume utilization rate is high; however, the construction and maintenance are difficult

2. Tumbling type: the water flows in the up and down direction and is fixed by hanging. The electrode plate does not contact with the pool wall to reduce the possibility of electric leakage. It is also convenient to replace the electrode plate

The plate spacing should be appropriate, generally about 0-40mm. If it is too large, the voltage requirement will be high and the power consumption will be large; if it is too small, it will not only be inconvenient to install, but also the plate material consumption will be high. Therefore, the plate spacing should be determined by considering various factors

Since the amount of electroplating wastewater is generally small, the treatment equipment can often be made of PVC, which can be operated continuously or indirectly according to the water quantity.

The purpose of the air pipe in the electrolytic cell is to supply air for stirring, and also to prevent the precipitation of hydroxide in the electrolytic cell. Generally, the air consumption is 0.2-0.3m3, (M3. Min), and the air pressure is 96-98kpa.

In order to increase the conductivity of wastewater, reduce the power consumption and remove the passive film on the electrode plate with chloride ion, it is necessary to add NaCl into the electrolytic cell with the dosage of 1-2g / L.

 Reflux electrolyzer


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