碱洗氧化工艺中杂质对硫酸钠结晶粒度的影响
收稿日期: 2021-07-02
网络出版日期: 2022-04-18
Effect of impurity in alkaline washing oxidation process on crystal size of sodium sulfate
Received date: 2021-07-02
Online published: 2022-04-18
刘壮 , 安继民 , 李永军 , 陈星 , 赵毅刚 , 翟瑞国 . 碱洗氧化工艺中杂质对硫酸钠结晶粒度的影响[J]. 无机盐工业, 2022 , 54(4) : 123 -127 . DOI: 10.19964/j.issn.1006-4990.2021-0397
Aiming at the evaporative crystallization of sodium sulfate in the desulfurization wastewater from alkaline washing oxidation process,an experimental device was designed and developed to investigate the influence of the impurities on the evaporative crystallization of sodium sulfate,mainly on the particle size of the sodium sulfate crystal,which include sodium carbonate,ferric ion and sodium sulfite in the wastewater.The results showed that 1.0% mass fraction of sodium carbonate in wastewater had no obvious influence on the particle size of sodium sulfate crystal.When iron existed in the form of precipitate,it was easy to cause sodium sulfate crystals to agglomerate and the particle size becomed smaller.When iron was existed in dissolved form,it had little effect on the particle size of sodium sulfate crystal.The existence of sodium sulfite was easy to reduce the particle size of sodium sulfate crystal.After eliminating sodium sulfite in wastewater by H2O2 oxidation,the crystal size of sodium sulfite was increased apparently.After the transformation of the industrial device,the average particle size of the anhydrous Na2SO4 product was increased from 106.71 μm to 129.99 μm.
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