磷酸二氢钾结晶热力学数据的测定及应用研究
收稿日期: 2020-07-27
网络出版日期: 2021-01-08
Determination and application of thermodynamic data of potassium dihydrogen phosphate crystal
Received date: 2020-07-27
Online published: 2021-01-08
刘珏欣 , 郑承刚 , 叶世超 . 磷酸二氢钾结晶热力学数据的测定及应用研究[J]. 无机盐工业, 2021 , 53(1) : 62 -64 . DOI: 10.11962/1006-4990.2020-0082
The solubility and super solubility of potassium dihydrogen phosphate in water were measured by equilibrium method and laser method,and the data of the metastable zone were obtained.Combined with the evaporation crystallization process of potassium dihydrogen phosphate industrial unit,the application of experimental data of crystallization thermodyna-mics in the production of potassium dihydrogen phosphate was discussed,and the optimal industrial crystallization operating conditions were obtained.For the production capacity of 1 000 kg/h potassium dihydrogen phosphate,the best industrial opera-ting conditions were as follows: feed liquid circulation volume was 50.4 m3/h,heating steam consumption was 1 932 kg/h and vacuum degree of the evaporator was 0.067 MPa.Performing the crystallization operation according to the determined process conditions can overcome powdery crystallization and obtain high-quality crystalline products with uniform particle size.
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