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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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低压省煤器升温缓蚀技术的经济性分析
, PP. 55-58
Keywords: 低压省煤器,低温腐蚀,壁温,缓蚀,低导热系数涂层,经济性
Abstract:
加装低压省煤器是降低电站锅炉排烟温度的有效途径,但会造成受热面腐蚀。对此,提出在低压省煤器低温管段内壁铺设低导热系数涂层以提高壁温，从而有效减缓低温腐蚀。以1000mw机组为例，计算分析了不同涂层厚度对受热面壁温和传热系数的影响。结果表明,与光管换热器相比,在维持换热器吸热量不变的条件下,采用在低压省煤器受热面低温段内表面铺设厚度为0.2mm的低导热系数涂层的方案,可使总换热系数下降9.1%,传热温差增加33.3%,减小受热面面积13.0%,降低烟气阻力70pa，经济效益显著。
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