烧石灰,生石灰;
Three softening methods had been tested, and the result showed that the efficiency of calcined soda-caustic soda softening method was better than calcined soda softening method and calcined soda-lime softening method to treat the system effluent with higher permanent hardness.
对三种软化方法的考察结果表明,对于永硬较高的循环水系统排污水,纯碱烧碱法的软化效果优于纯碱法和纯碱石灰法。
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