氯盐体系硝酸/盐酸脉冲萃取分离装置水力学研究

doi:10.19964/j.issn.1006-4990.2021-0140

Abstract

Abstract:

Direct method of nitric acid-potassium chloride can produce potassium nitrate for molten salt at low cost.The se-paration of nitric acid/hydrochloric acid from a solution containing chloride salts by solvent extraction is one of the key steps.The hydraulic performance of the pulsed sieve plate extraction column in the treatment of H⁺/K⁺/Cl^-/H₂O-tributyl phosphate/sulfonated kerosene system was studied.The results showed that the diameter of the dispersed phase drops decreased with the increase of the pulse intensity,and the superficial velocity of the two phases had almost no effect on it.The holdup firstly decreased and then increased with the increase of the pulse intensity,and increased with the increase of the superficial velocity of the two phases.According to the experimental data,Kumar-Hartland correlations of drop diameter and holdup were fitted,and the average absolute relative deviation（AARD） was 4.74% and 5.60%,respectively.

Key words: chloride system, solvent extraction, pulsed sieve plate extraction column, hydraulics

CLC Number:

TQ124.4

PAN Baicheng,SUN Ze,MA Zhen,ZHANG Haijun,DONG Changji,SONG Xingfu. Study on hydraulics of pulsed extraction separation device for nitric acid/hydrochloric acid in chloride salt system[J]. Inorganic Chemicals Industry, 2022, 54(1): 91-95.

Figures/Tables 11

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References 31

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有效塔段高度/mm	有效塔段内径/mm	上/下澄清段高度/mm	上/下澄清段内径/mm	脉冲入口直径/mm
1 100	50	300	88	18
筛板数	板间距/ mm	筛板厚度/mm	筛板孔径/mm	筛板开孔率/%
20	50	1.5	3	23

物料	ρ/（kg·m^-3）	μ/（Pa·s）	γ/（N·m^-1）
HCl/KCl/H₂O	1 112	0.984×10^-3	9.849×10^-3
TBP（30%）/煤油	860	1.923×10^-3	9.849×10^-3

National Inorganic Salts Information Center

Inorganic Acid-Base-Salt Committee of CIESC

Study on hydraulics of pulsed extraction separation device for nitric acid/hydrochloric acid in chloride salt system

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