Chemical production, chemical equipment corrosion is a major problem. The amount of steel wasted every year is huge due to corrosion. In our country, the chemical industry equipment damage is also the main reason for corrosion. Therefore, a lot of equipment life is only 1-2 years, the shortest only 1-2 months. Titanium in the corrosion-resistant, wear-resistant, erosion-resistant, with extremely excellent performance. Although a one-time high investment in titanium equipment, but life is carbon steel, stainless steel and cast iron equipment several times, several times. Due to its advantages such as low density, high strength and good corrosion resistance, Titanium has been favored by the successful solution to the serious corrosion problem of equipment in chemical production, which has brought a great leap forward to chemical industrial anti-corrosion technology.
Chemical system is the earliest use of titanium in China's civilian industry, and the largest amount of industrial sector. In the past 10 years, the amount of titanium used in China's chemical industry is equivalent to the sum of titanium production in 2009 and 2010. The table lists the proportion of titanium in all fields in China's chemical industry
Titanium in the chemical industry
At present, titanium in the chemical industry as long as the application areas:
The earliest titanium in the chemical industry, the largest user is chlor-alkali industry. Including chlorine, chlorine oxides, pesticides, boil powder production, in the production of chlorine, titanium equipment and pipelines account for almost one quarter of its total mass'. Such as for the metal anode electrolyzer, ion-exchange membrane electrolyzer and anolyte pump, tube wet chlorine cooler, chlorine wastewater dechlorination tower, chlorine cooling scrubber, refined brine preheater, pumps and valves for vacuum dechlorination .
Soda ash industry
In the production of soda ash, titanium is mainly used in crystallization cooler, distillation tower top ammonia condenser, ammonium chloride mother liquor heater, plate heat exchanger, umbrella plate heat exchanger, carbonation tower cooling tube, carbon dioxide turbine compressor Rotor impeller, lye pump and so on.
3. Vacuum salt industry
Titanium ammonia evaporator, titanium preheater, titanium precooler, titanium flange, titanium tube plate, titanium pump shell and titanium elbow.
4. Petrochemical fiber
At present, whether imported from abroad, or domestic design and manufacture of polyester, nylon, vinylon and other petrochemical enterprises have used some titanium equipment. The application of titanium equipment plays an active role in the development of chemical fiber production in our country. Especially for safe and stable continuous production, improving product quality, preventing premature corrosion failure of stainless steel, increasing equipment service life, reducing parking and overhauling, and improving comprehensive economic benefits, A significant contribution.
5. Fine chemical industry
Propylene oxide plant industrial raw materials is a strong corrosive medium. The two main feedstocks used in PO production are liquid chlorine and propylene. These highly corrosive media provide the basis for the corrosion of equipment piping in PO plants and are manufactured under such process conditions as carbon steel, Al, Cu, Ni, stainless steel And other metals are unable to resist corrosion, only titanium is the ideal anti-corrosion metal materials.
Inorganic salt industry
Inorganic salts mainly include chlorates and potassium salts. Domestic sodium chlorate production in the past two years the rapid development of total production capacity exceeded 1 million t, and another about 500000 t in the expansion or preliminary work.Chlorate titanium equipment are electrolyzer, titanium anode, reaction generator , Evaporator and so on, each 10,000 t sodium chlorate probably need to use titanium 15t.
Potash products include potassium chloride, potassium sulfate, potassium nitrate, potassium carbonate, etc. At present, the total capacity of potassium nitrate and potassium carbonate in China is about 600,000 tons. Evaporators, preheaters and coolers in the production of potassium nitrate and potassium carbonate require the use of titanium equipment.
7. other industries
Titanium Dioxide Titanium for film concentrators, calciner kiln feed pipe, centrifuge distribution plate.
Urea titanium material for the urea synthesis tower lining, ammonia stripper, the general decomposition tower heater, methylamine pump inlet and outlet valves and springs, high pressure mixers.
Dye Titanium for heat exchangers, absorption towers, tower cleaning towers, fans, water ring vacuum pumps, filters and so on.
Nitric acid titanium material for nitric acid evaporator, nitrogen oxide exhaust preheater, nitric acid steam preheater, gas scrubber, rapid cooler, condenser, turbo blower, pumps, valves, pipes and so on.