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从传化器*三层来的烟气在冷中间交换器a和b中冷却,然后流过一吸塔。在此三层转化的so3被次吸收到循环的98.5%硫酸中,然后烟气经过一个除雾器流出,在冷中间热交换器a和b及热中间热交换器被重新加热,然后返回转化器的*四层进行二次转化。烟气在进入二吸塔之前在冷热交换器和so3冷却器中被冷却。二吸塔中,*四层转化形成的so3被吸收到循环的98.5%硫酸中。烟气经过一个碰撞型除雾器后流出塔,进入烟囱排放,基本上没有so2和酸雾。通过一组在两系统中允许自动控制酸浓和泵槽液位的串酸管线,它与用于干燥塔的浓酸系统连通。
一吸塔上塔流量控制,通过调节在共用一吸/二吸塔酸冷器酸旁路管线上的阀门。上塔的酸温控制,通过调节从共用酸冷器到一吸塔的流出管线上阀门。
二吸塔上塔流量控制,通过调节在共用酸冷器酸旁路管线上的阀门。上塔的酸温控制,通过调节在从一吸/二吸塔酸冷器到埂吸塔的流出管线上的阀门。
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