Selection of absorber mixer materials

电源：

～380V 50HZ

功率：

37KW 变频电机

The working environment of the desulfurization absorption tower mixer in thermal power plants is very harsh. Absorber mixer materials must be carefully considered. Ensure it is resistant to corrosion and wear. There are many factors to consider when selecting absorber mixer materials. When the mixer is running in the limestone gypsum slurry to promote the oxidation reaction to fully proceed, it is affected by various corrosions (chemical corrosion, electrochemical corrosion and crystallization corrosion). Therefore, the chemical properties of the material, especially the corrosion resistance, affect the material selection. Important reasons: The higher the corrosion resistance, the more conducive to the improvement of service life. According to % chromium + . % molybdenum + % nitrogen, the higher the content of the three elements, the larger the value, the better the corrosion resistance. In addition, adding elements can enhance the resistance. The acid corrosion ability can reduce the tendency of elements to react with acid, but it is the most fundamental element for corrosion resistance. Therefore, the content cannot be too large, but when the acid and element are added too much, the material cost will increase. The mechanical properties of materials can also affect material selection. Compared with single austenitic alloys with the same alloy composition, dual-phase (ferrite + austenite) alloys have similar corrosion resistance, but have higher yield strength and are more resistant to corrosion. Wear, stronger resistance to stress corrosion cracking, and the blades are subject to cavitation and external loads during the mixing process, which also places higher requirements on the mechanical properties of the alloy. Therefore, the high strength of the material is beneficial, but both The plastic toughness of the phase alloy is not as good as that of the single austenitic alloy, and the formability is poor, making it difficult to process the blades. Judging from past development, the material content is stable between ~%, and the content is around % and .%, and the alloy structure gradually transitions from single austenitic stainless steel to duplex stainless steel.
In order to improve the corrosion and wear resistance of the alloy, extend the service life and save costs, the absorption tower stirrer produced by Guangzhou Essen Environmental Protection Technology Co., Ltd. performs surface treatment (ion implantation, laser heat treatment, etc.) on the impeller to form a coating. For example, the spray melt layer designed to resist gas corrosion has a service life that is % longer than that of a traditional agitator impeller.
If interested, please contact Mr. Liu