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烟气消白方案,BXB板式换热器

Author:heat exchanger    Publish time:2022-02-19 21:40:02    View:217

钢铁.焦化.化工、铜炉的烟气在排放前大都进行喷淋或湿法脱疏,温度降至45~ 80C,此时的烟气是饱和湿烟气。烟气中含有大量水蒸汽。水蒸汽中含有消融性盐、SO,、凝胶粉尘.微尘等(都是雾霾的重要成分).

假定湿烟气在烟囱出口的状况点为A,环境空气的状况点为E。湿烟气由烟囱排出与环境空气混淆过程中,湿烟气到B点后变为饱和状态。之后状况点沿着饱和曲线BCD变化,随着湿烟气温度的降低,湿烟气中过饱和的水蒸气凝集成液态小水滴。小水滴对光线产生折射、散射。从而使烟囱出口的烟羽出现白色或者灰色,形成湿烟羽。

烟气消白方案

烟气消白就是在烟气排入大气前,将其中的部分水份去除,从而避免烟囱冒“白烟’。降低“白烟”对环境的影响。

通常情况下。烟气消白一般是先对烟气进行降温冷凝,再对烟气进行加热。

气宇烟气消白机组的主要部件是BXB板式换热器,在板式换热器内,利用环境空气对烟气进行冷却。从而析出烟气中的水份。之后对烟气进行再热,提升烟气温度,使烟气在排入大气环境时不会出现“白烟”-



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