湿法脱硫钢筋混凝土单筒烟囱防腐结构优化

Anti-corrosion optimization of reinforced concrete single tube chimney in wet desulfurization condition

燃煤电厂采用湿法脱硫后,新建工程几乎不采用单筒钢筋混凝土烟囱。为使经济简洁的单筒式钢筋混凝土烟囱继续在电力行业使用成为可能,在对国内燃煤电厂混凝土烟囱的实际现状进行调研并对烟气凝结酸液进行化学分析的基础上,提出了烟囱结构防腐优化措施:采用抗渗混凝土筒身,筒身内壁做二布五涂抗渗防腐隔离层,内衬采用带企口憎水耐酸砖,紧贴隔离层砌筑。山西国锦煤电有限责任公司210 m烟囱采用了该设计方案,烟囱耐酸耐腐,经济适用,运行3年无渗漏。

Since the coal-fired power plant adopts wet desulphurization,reinforced concrete single tube chimney has to be used in new projects. To keep this simple and economic chimney available in electric industry, some anti-corrosion optimizing measures for chimney structure are proposed after numerous researches were taken on domestic coal-fired power plant in current condition and chemical analysis of the flue gas condensation acid was made: using the impermeable concrete cylinder body,sticking two layers of cloth and five glue painting in the lining tube body as seepage prevention and anti-corrosion insulation,lining with belt tongue-and-groove hydrophobic acid-proof brick,closing to the building form of isolation layer. The 210 m chimney of Shanxi Guojin Coal Power Company Limited took this measure which is acid resistant and corrosion resistant,and economically applicable. There is no seepage after 3-years operation.