Experimental investigation and cost assessment of the salt production by solar assisted evaporation of saturated brine

doi:10.1016/j.cjche.2017.08.016

Chinese Journal of Chemical Engineering ›› 2018, Vol. 26 ›› Issue (4): 701-707.DOI: 10.1016/j.cjche.2017.08.016

• Separation Science and Engineering • 上一篇下一篇

Experimental investigation and cost assessment of the salt production by solar assisted evaporation of saturated brine

Jing Zhao^1,2, Huaigang Cheng¹, Xiao Wang², Wenting Cheng¹, Fangqin Cheng¹

1 Institute of Resources and Environmental Engineering, State Environment Protection Key Laboratory of Efficient Utilization of Coal Waste Resources, Shanxi University, Taiyuan 030006, China;
2 College of Chemical Engineering, Qinghai University, Xining 817000, China

收稿日期:2017-04-01 修回日期:2017-08-22 出版日期:2018-04-28 发布日期:2018-05-19
通讯作者: Fangqin Cheng,E-mail address:cfangqin@sxu.edu.cn
基金资助:
Supported by the National Natural Science Foundation of China (51674162), the TriJin Scholars and Natural Science Foundation of Shanxi Province (201601D102058) and the Provincial Research Projects (2016JD06, 2016-HZ-803).

Experimental investigation and cost assessment of the salt production by solar assisted evaporation of saturated brine

Jing Zhao^1,2, Huaigang Cheng¹, Xiao Wang², Wenting Cheng¹, Fangqin Cheng¹

1 Institute of Resources and Environmental Engineering, State Environment Protection Key Laboratory of Efficient Utilization of Coal Waste Resources, Shanxi University, Taiyuan 030006, China;
2 College of Chemical Engineering, Qinghai University, Xining 817000, China

Received:2017-04-01 Revised:2017-08-22 Online:2018-04-28 Published:2018-05-19
Contact: Fangqin Cheng,E-mail address:cfangqin@sxu.edu.cn
Supported by:
Supported by the National Natural Science Foundation of China (51674162), the TriJin Scholars and Natural Science Foundation of Shanxi Province (201601D102058) and the Provincial Research Projects (2016JD06, 2016-HZ-803).

摘要/Abstract

摘要： The technical feasibility and economy of solar heat collection-forced evaporation process are the keys to its practicality, especially its application in strong brine treatment. The operation cost of applying solar collection in salt manufacturing through depth evaporation of brine has been studied. For Na⁺, K⁺, Mg²⁺//Cl^-, SO₄^2--H₂O salt-water system, most of the NaCl and all of the Carnallite were separated. The operation cost reached the optimum when the heat collection and evaporation were controlled at 75 and 55℃, respectively. When the solar radiation amount was 19557 kJ·m^-2·d^-1, the solar collector area for producing Carnallite was about 34.27 m²·(t salt)^-1, and the operation cost was 13 USD·(t salt)^-1. The energy consumption of salt manufacturing is at least 25% higher than that of natural evaporation. Regarding the economy, the solar assisted salt manufacturing process is recommended to be performed at a production scale of more than 20 tons per day.

关键词: Solar collection, Evaporation, Brine, Salt manufacturing, Economy

Abstract: The technical feasibility and economy of solar heat collection-forced evaporation process are the keys to its practicality, especially its application in strong brine treatment. The operation cost of applying solar collection in salt manufacturing through depth evaporation of brine has been studied. For Na⁺, K⁺, Mg²⁺//Cl^-, SO₄^2--H₂O salt-water system, most of the NaCl and all of the Carnallite were separated. The operation cost reached the optimum when the heat collection and evaporation were controlled at 75 and 55℃, respectively. When the solar radiation amount was 19557 kJ·m^-2·d^-1, the solar collector area for producing Carnallite was about 34.27 m²·(t salt)^-1, and the operation cost was 13 USD·(t salt)^-1. The energy consumption of salt manufacturing is at least 25% higher than that of natural evaporation. Regarding the economy, the solar assisted salt manufacturing process is recommended to be performed at a production scale of more than 20 tons per day.

Key words: Solar collection, Evaporation, Brine, Salt manufacturing, Economy

Jing Zhao, Huaigang Cheng, Xiao Wang, Wenting Cheng, Fangqin Cheng. Experimental investigation and cost assessment of the salt production by solar assisted evaporation of saturated brine[J]. Chinese Journal of Chemical Engineering, 2018, 26(4): 701-707.

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Experimental investigation and cost assessment of the salt production by solar assisted evaporation of saturated brine

Experimental investigation and cost assessment of the salt production by solar assisted evaporation of saturated brine

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