The chlor alkali industry is a chemical industry that produces chlorine gas and caustic soda by electrolysis of salt water solution, with a history of over a century. The chlor alkali industry is also one of the earliest industries in the chemical industry to apply titanium. The titanium equipment used in chlor alkali production mainly includes: metal anode electrolysis tank, ion membrane electrolysis tank, tubular wet chlorine cooler, refined brine preheater, dechlorination tower, chlor alkali cooling washing tower, vacuum dechlorination pump and valve, and other titanium equipment.

Metal anode

The production processes of chlor alkali include mercury electrolysis, membrane electrolysis, and ion membrane electrolysis. In the past, graphite anodes were always used as chlor alkali anodes.

In an ion exchange membrane electrolysis cell, the temperature of the cathode and anode chambers is around 90 ℃. The anode chamber contains chlorine gas and salt solution, while the cathode chamber contains caustic soda solution with a concentration of 30% to 35%. The ion exchange membrane electrolysis cell generally operates with a current density of 30-40A/dm. Under such harsh operating conditions, it is necessary to fully consider the material usage and anti-corrosion structure of the electrolytic cell when designing it. The anode part (referring to the anode and the part in contact with the anode solution) of ion exchange membrane electrolyzers has been selected by countries around the world without exception, as titanium metal (or corrosion-resistant titanium alloy) with good corrosion resistance in the anode solution.

In addition to the main equipment of the ion exchange membrane caustic soda device, the titanium equipment is mainly used in the following areas: brine system - liquid level gauge; Anode liquid system - anode liquid tank and chlorine washing tower; Fresh water system - dechlorination tower, fresh water distributor, instrument cooler; Sodium hypochlorite system - cooling, absorption tower, distributor; Chlorine system - wet chlorine cooler; Pest removal system - heat exchanger, pest removal fan.