Integrated system of comprehensive utilizing the concentrated brine of Yuncheng salt-lake basing on salt-forming diagram

doi:10.1016/j.cjche.2018.03.008

Chin.J.Chem.Eng. ›› 2019, Vol. 27 ›› Issue (1): 182-190.DOI: 10.1016/j.cjche.2018.03.008

• Chemical Engineering Thermodynamics • Previous Articles Next Articles

Integrated system of comprehensive utilizing the concentrated brine of Yuncheng salt-lake basing on salt-forming diagram

Huan Zhou, Jingjing Tang, Jian Guo, Yaping Dai, Guangbi Li, Bo Yan

College of Chemical Engineering and Materials Science, Tianjin Key Laboratory of Marine Resources and Chemistry, Tianjin University of Science and Technology, Tianjin 300457, China

Received:2018-01-10 Revised:2018-03-19 Online:2019-01-31 Published:2019-01-28
Contact: Huan Zhou
Supported by:
Supported by the National Natural Science Foundation of China (U1407204), the Yangtze Scholarsand Research Team in university of Ministry of Education of China (IRT_17R81), the Innovative Research Team of Tianjin Municipal Education Commission (TD12-5004), and the Foundation of Tianjin Key Laboratory of Marine Resources and Chemistry (201602).

Integrated system of comprehensive utilizing the concentrated brine of Yuncheng salt-lake basing on salt-forming diagram

Huan Zhou, Jingjing Tang, Jian Guo, Yaping Dai, Guangbi Li, Bo Yan

College of Chemical Engineering and Materials Science, Tianjin Key Laboratory of Marine Resources and Chemistry, Tianjin University of Science and Technology, Tianjin 300457, China

通讯作者: Huan Zhou
基金资助:
Supported by the National Natural Science Foundation of China (U1407204), the Yangtze Scholarsand Research Team in university of Ministry of Education of China (IRT_17R81), the Innovative Research Team of Tianjin Municipal Education Commission (TD12-5004), and the Foundation of Tianjin Key Laboratory of Marine Resources and Chemistry (201602).

Abstract

Abstract: The comprehensive utilization and environment-friendliness of processes for recovering fresh water or valuable salt from seawater, salt-lakes, or mineral deposits are of utmost importance for sustainable development. One primitive sustainable process for recovering salt from sodium-sulfate-type brine in Yuncheng salt lake had been considered one of the greatest inventions of ancient China, however, the replaced process of mass extraction of single Na₂SO₄ in recent years, has reduced a large amount of residual brine. In this research, relying on the salt-forming diagram in the non-equilibrium state, the technical secrets of ancient salt processes were uncovered, and a new comprehensive utilization system was proposed and tested experimentally. The new system includes a vacuum salt-making process and a normal pressure kieserite process, which can gradually eliminate the existed waste liquid and aid in the sustainable development of the Yuncheng salt-lake. The continuous experiment of salt-making process running stably in the double salt region without double salt formation, which proves the feasibility of salt-forming diagram applied in industrial process. Thus salt-forming diagram would be extremely valuable to industry process design and control, especially, the treatment of concentrated brine.

Key words: Phase diagram, Brine, Salt-forming, Nonequilibrium state, Comprehensive utilization

摘要： The comprehensive utilization and environment-friendliness of processes for recovering fresh water or valuable salt from seawater, salt-lakes, or mineral deposits are of utmost importance for sustainable development. One primitive sustainable process for recovering salt from sodium-sulfate-type brine in Yuncheng salt lake had been considered one of the greatest inventions of ancient China, however, the replaced process of mass extraction of single Na₂SO₄ in recent years, has reduced a large amount of residual brine. In this research, relying on the salt-forming diagram in the non-equilibrium state, the technical secrets of ancient salt processes were uncovered, and a new comprehensive utilization system was proposed and tested experimentally. The new system includes a vacuum salt-making process and a normal pressure kieserite process, which can gradually eliminate the existed waste liquid and aid in the sustainable development of the Yuncheng salt-lake. The continuous experiment of salt-making process running stably in the double salt region without double salt formation, which proves the feasibility of salt-forming diagram applied in industrial process. Thus salt-forming diagram would be extremely valuable to industry process design and control, especially, the treatment of concentrated brine.

关键词: Phase diagram, Brine, Salt-forming, Nonequilibrium state, Comprehensive utilization

Huan Zhou, Jingjing Tang, Jian Guo, Yaping Dai, Guangbi Li, Bo Yan. Integrated system of comprehensive utilizing the concentrated brine of Yuncheng salt-lake basing on salt-forming diagram[J]. Chin.J.Chem.Eng., 2019, 27(1): 182-190.

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Integrated system of comprehensive utilizing the concentrated brine of Yuncheng salt-lake basing on salt-forming diagram

Integrated system of comprehensive utilizing the concentrated brine of Yuncheng salt-lake basing on salt-forming diagram

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