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Wang Weixing introduced that the problems caused by the corrosion of flue gas, such as many problems, low efficiency, high cost, and high risks, directly affect the effect of environmental governance. At present, there are three kinds of anti-corrosion materials used in China's desulfurization equipment, and there are certain problems. Carbon steel is generally used to line glass steel, glass flake or rubber lining materials. Due to poor wear resistance and different coefficients of expansion of various materials, such materials often appear to be lining-off and damaged, leading to failure of preservation. Followed by ceramic materials, and this material can not resist the fluorine in the flue gas corrosion. The third is stainless steel material with good corrosion resistance, but this material cannot withstand the high temperature and long-term corrosion of sulfur dioxide, fluorine, and chlorine in the flue gas.
Wang Weixing said: "There are many examples of improper desulphurization measures in the flue gas desulphurization project and the desulfurization equipment is corroded and cannot operate properly." He told reporters that at present, Liuzhou Iron and Steel, Shigang, Pangang and other steel companies have installed desulphurization equipment. The corrosion of equipment has affected the normal operation of the company. Some enterprises' desulfurization equipment will be seriously corroded in less than half a year. If it is not repaired or replaced in time, it will lead to major production accidents, resulting in the occurrence of harmful substances such as run, run, drip, and leakage, and new pollution to the environment.
According to the expert, at home and abroad, a composite plastic with high temperature resistance, corrosion resistance and long service life has been successfully developed. Now it has been applied to flue gas desulfurization equipment in China's power and non-ferrous metal industries. Even at high temperatures of 150°C to 2000°C and sulfuric acid mist corrosion, equipment operation rates and safety hazards due to equipment corrosion did not occur. He therefore called for materials like this to be actively promoted. Flue gas desulfurization equipment manufacturers must optimize the selection of materials to eliminate hidden corrosion hazards.
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