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  • 脱硫设备防腐方案
  • 作者:更新时间:2020-03-03 11:06:08 浏览次数:

    湿法脱硫(FGD) 的工艺决定了该系统设备在固、液、气三态下运行,设备
    承受温度高低不一,甚至同一设备在不同工作状态温度也不一致;设备同时承受
    腐蚀、磨损的复合工况,不同设备的腐蚀和磨损也不一致;设备运行时一直处于
    小幅振动状态。当前脱硫系统的防护,浆液管道多选用衬胶工艺,吸收塔多选用
    内衬玻璃鳞片工艺。但在使用中也存在着不足,如衬胶会出现鼓包、脱落现象;
    鳞片涂层会出现开裂、脱落现象,为脱硫系统的运行带来了安全隐患。单纯的防
    腐或防磨并不能完全解决脱硫系统的防护问题。脱硫系统防护涂层的理想性能
    为:材料具有优异的耐腐蚀性、耐磨性、耐老化性、抵抗热水的渗透性、能耐高
    温并能承受高低温差的循环、足够的韧性能抵抗设备的振动和不同材料间膨胀系
    数不同造成的内应力、与基材间优异的粘接力、材料自身强度高不易开裂等。

    The process of wet FGD determines that the equipment of the system operates in the three states of solid, liquid and gas
    The bearing temperature is different, even the temperature of the same equipment under different working conditions is not the same; the equipment bears the temperature at the same time
    Under the compound working condition of corrosion and wear, the corrosion and wear of different equipment are not the same; the equipment is always in
    Small amplitude vibration state. At present, for the protection of desulfurization system, rubber lining technology is often used for slurry pipeline and absorption tower
    Glass lined flake process. However, there are some shortcomings in the use, such as bulge and falling off of rubber lining;
    The scale coating will crack and fall off, which brings potential safety hazards to the operation of desulfurization system. Simple prevention
    Corrosion or anti-wear can not completely solve the protection problem of desulfurization system. Ideal performance of protective coating for desulfurization system
    For: the material has excellent corrosion resistance, wear resistance, aging resistance, resistance to hot water permeability, high resistance
    It can withstand the cycle of high and low temperature difference, has enough toughness and can resist the vibration of equipment and the expansion system between different materials
    The internal stress caused by different numbers, excellent adhesion with the base material, high strength of the material itself, not easy to crack, etc.



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