摘要
冶炼污酸废水经石灰中和处理后产生高钙废水,分别考察了在不同pH条件下采用二氧化碳和碳酸钠进行脱钙的效果,结果表明pH值对二氧化碳脱钙效果影响较大,在pH大于12.6时采用二氧化碳进行脱钙,钙离子脱除率高,具有较大的成本优势,当废水中的pH降低至11以下时,二氧化碳脱钙效率显著下降,需通过额外投加碳酸钠或者氢氧化钠进行脱除,综合成本与采用碳酸钠进行脱钙基本一致,无明显成本优势。
Smelting sewage acid wastewater after lime neutralization treatment wastewater,and high calcium were investigated under different pH conditions using carbon dioxide and sodium carbonate to the effect of decalcified,the results showed that pH had a greater influence on the effect of the carbon dioxide decalcified,when pH greater than 12.6 decalcified with carbon dioxide,and some calcium removal rate is high,have larger cost advantages,when in the wastewater pH reduced to less than 11,a significant reduction in the carbon dioxide demineralization efficiency,should be carried out by adding the sodium carbonate or sodium hydroxide additional removal,comprehensive cost and demineralization are basically identical with sodium carbonate,and no obvious cost advantage.
作者
高宝钗
吴财松
易玉龙
Gao Baochai;Wu Caisong;Yi Yulong(Science Environmental Protection Co.,Ltd.,Changsha 410007,China)
出处
《广东化工》
CAS
2020年第13期132-133,共2页
Guangdong Chemical Industry
关键词
高钙废水
二氧化碳
碳酸钠
冶炼废水
high calcium wastewater
carbon dioxide
sodium carbonate
smelting waste water
