题目：
计算题：某厂需供除盐水量Q为70m3/h，原水阳离子总量I=7mmol/L，如果使用工作交换容量Ei=800mol/m3的阳树脂，树脂层高H=2m，选取交换器运行周期26h（24h运行，2h小时再生），计算交换器的直径d。
答案：
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参考答案：D
计算题：某厂需供除盐水量Q为70m3/h，原水阳离子总量I=7mmol/L，如果使用
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