Because titanium has excellent corrosion resistance, mechanical properties and process properties, it is widely used in many sectors of the National Economy. Especially in chemical production, the use of titanium instead of stainless steel, nickel-based alloys and other rare metals as corrosion-resistant materials can increase production, improve product quality, extend equipment life, reduce consumption, reduce energy consumption, reduce costs, and prevent Pollution, improvement of working conditions and productivity are all very important. In recent years, the scope of titanium used in the chemical industry in our country has been expanding, and the amount used has increased year by year. Titanium has become one of the main anti-corrosion materials in chemical equipment. Titanium, as a corrosion-resistant structural material used in chemical equipment, has established its position, and as an ideal material in chemical equipment, titanium has increasingly attracted the attention of engineers and technicians.
(1) Chlor-alkali industry
The Chlor-alkali industry is an important basic raw material industry, and its production and development have a great impact on the national economy. This is because the corrosion resistance of titanium to chloride ions is better than that of commonly used stainless steel and other non-ferrous metals. Currently, titanium is widely used in the Chlor-alkali industry to manufacture metal anode electrolyzers, ion-exchange membrane electrolyzers, wet chlorine coolers, refined brine preheaters, dechlorination towers, chlorine cooling scrubbers, etc. In the past, the main components of these equipment used non-metallic materials (such as graphite, polyvinyl chloride, etc.). The mechanical properties, thermal stability and processing performance of non-metallic materials were not ideal, resulting in bulky equipment, high energy consumption, and longevity. Short, and affect product quality and pollute the environment.
(2) Soda ash industry
Soda ash is one of the most basic chemical raw materials, and it is directly related to the development of the national economy. During the production of soda ash, the gaseous media are mostly NH3 and CO2, and the liquid media are mostly NaC1, NH4C1, NH4HCO3 and solutions with a higher concentration of C1-. Carbonization tower small tubes and hot mother liquor coolers are used for carbonation reaction with carbon drink and cast iron The main equipment such as coolers, crystal external coolers, etc., are not corrosion-resistant, with serious corrosion and leakage, and their service life is less than three years.
Titanium and its alloys have many excellent characteristics such as lightweight, high strength, strong heat resistance, and corrosion resistance. They are known as the "future metal" and are new structural materials with promising development. Titanium and its alloys not only have very important applications in the aviation and aerospace industries, but also have begun to be widely used in many industrial sectors such as chemical industry, petroleum, light industry, metallurgy, and power generation.
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