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影响锅炉脱硫塔脱硫效果的操作因素有哪些

发布时间:2019/2/22 15:51:36 点击量: 作者:盛宝

影响锅炉脱硫塔脱硫效果的操作因素有:温度、压力、溶剂的循环量等。温度:温度升高时,MDEA的碱性减弱,对吸附不利,但温度过低又会导致原料气中较重组分冷凝,促使溶剂发泡;所以在正常的生产中通常保持溶剂的温度比气体进料温度高5—6℃。
压力:压力升高有利于吸附过程的进行,但过高的压力会导致原料气中的较重组分液化。
溶剂的循环量:溶剂的循环量不足会导致吸收效果差,循环量过大会导致动力消耗大,所以循环量应控制在刚好能满足化学吸附所需量为好。

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国际烟囱协会在其发布的《钢烟囱标准规程》:
1)烟气冷凝物中氯化物或氟化物的存在将很大提高腐蚀程度
2)处于烟气脱硫系统下游的浓缩或饱和烟气条件通常被视为高腐蚀等级(化学载荷)。
3)确定含有硫磺氧化物的烟气腐蚀等级是按SO3的含量值为依据 4)烟气中的氯离子遇水蒸气形成氯酸,它的化合温度约为60℃,低于氯酸温度时,就会形成严重的腐蚀,即使是化合物中很少量的氯化物也会造成严重腐蚀。

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