Application of titanium anode and active coated titanium anode in electrochemical industry

Titanium anode, as the anode of titanium oxide coating, compared with the general electrode materials, has good catalytic performance, small change in pole distance, strong corrosion resistance, mechanical strength and processing performance, is favored by many fields. There are also several reasons to explore such a hot market:

First, titanium anode working life is long, diaphragm production of chlor-alkali industry, metal anode resistance to chlorine and alkali corrosion. Compared with graphite anode only 8 months of use time, titanium anode life has been more than 6 years. It can overcome the dissolution of graphite anode and lead anode, avoid the pollution of electrolyte and cathode products, and improve the purity of metal products. Due to the use of metal anode, high temperature and high current density operation of chlorate electrolyzer is possible. The use of metal anode can improve the structure of electrolytic cell, reduce the power consumption, accelerate the chemical reaction of hypochlorite to chlorate, and thus improve the production performance.

Two, titanium anode can greatly improve the current density, diaphragm production of chlor-alkali, the working current density of graphite anode is 8A/dm2, titanium anode can be multiplied, up to 17A/dm2, so in the electrolytic plant, electrolytic cell under the same conditions, the output can be increased by 1 times, improve the single cell production capacity, effectively improve the labor production efficiency. Titanium anode is suitable for electrolysis under high current density. In addition, the size of the titanium anode is stable and the distance between electrodes does not change during the electrolytic process, which can ensure the electrolytic operation under the condition of stable tank voltage.

Three, the working power is low, so the power consumption is small, can save the power consumption, DC power consumption can be reduced by 10% ~ 20%. The main reasons for the low working voltage of titanium anode are as follows:

1) The overpotential of active coated titanium anode to chlorine and oxygen is relatively low. When chlor-alkali was produced by brine electrolysis, the overpotential of titanium anode to chlorine was lower than that of graphite anode at 1A/cm2 by 140mV.

2) It can reduce the "bubble shielding effect". The bubbles generated on the metal anode surface are relatively small and fast, so that the inflation between the electrodes is greatly reduced, the ohmic drop between the poles is about 700mV, and the bubble diameter is about 3mm;

3) The resistance of the anode structure is reduced;

4) The distance between the poles is shortened.

4. The design concept and operating conditions of salt electrolyzer using DSA, mercury method and diaphragm method are improved, and the energy consumption is reduced. Low DSA over potential and easy elimination of bubbles on the surface between electrodes are important reasons for the voltage reduction of metal anode electrolytic cell. It is reported that in the 1960s, the annual electricity consumption of the world's salt electrolysis industry is about 150 billion degrees, the use of metal anode, can save about 300 million degrees of electricity every year. At the same time, titanium anode light weight, can reduce labor intensity.

In the future, with the improvement of titanium anode production technology and production equipment, titanium anode will be widely used in aviation, automobile, medical, ocean engineering and other fields in addition to electrolytic salt. It is reported that in recent years, the application of titanium anode in human daily life is constantly expanding, and the development speed is fast, and the application technology is more mature and perfect.

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