The article discloses fundamental causes of widespread acidic water leaking problems and structural threats on stacks operating with FGD in China, that impactflue gas emission and environmental conservation in general. Summarizing stack anti-corrosion practices in western countries and China, a practical solution on refurbished and newly constructed FGD stacks is presented:large diameter modular FRPflues.%大量的脱硫烟囱的酸水泄漏问题，危害高空结构的安全，制约了中国的烟气排放和环保的发展。本文揭示了其泄漏的根本原因。总结西方国家和中国脱硫烟囱防腐蚀的经验，本文提出了针对技改和新建脱硫烟囱有效的技术方案：组装式大直径玻璃钢烟囱。
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