Experimental investigation and cost assessment of the salt production by solar assisted evaporation of saturated brine |
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Authors: | Jing Zhao Huaigang Cheng Xiao Wang Wenting Cheng Fangqin Cheng |
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Affiliation: | 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 |
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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-,SO42--H2O saltwater system,most of the NaCl and all of the Camallite were separated.The operation cost reached the optimum when the heat collection and evaporation were controlled at 75 and 55 ℃,respectively.When the solar radiationamount 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. |
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Keywords: | Solar collection Evaporation Brine Salt manufacturing Economy |
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