| Summary: | 碩士 === 國立中興大學 === 生物產業機電工程學系所 === 106 === A base in the Specialized Pickled Cabbage Producing Area of Dapi Township, Yunlin County, Taiwan, processing pickled cabbage, yields high concentration of salty water of 1044.48 to 1443.84 m3 each year. There is already a unit tested system treating approximately 75 m3 salty water a year. By this observation, there is a project to expand current unit tested system, and based on Environmental Impact Assessment. The flow of salty water of expanded system will go through multiple large evaporation pools and small evaporation pool to increase the concentration of salty water. And then, the final process was into crystalizing pool for crystallization.
Therefore, in order to keep the treatment steady and easy operation, this research is focus on the control method of treatment flow of salty water. There are two equations in the thesis：Experiment-basic equation (〖Evap.〗_(NaCl(aq))=0.02e^(0.0186T_E )×t_total) based on the experiment data, and the equation ( h_(NaCl(aq))=〖0.00049×t〗_total×H_unit) based on thermal equilibrium. In calculating evaporation of short-term period, the evaporation values from both of them need to be corrected by linear regression. And while in calculating annual evaporation, only the value from thermal-basic equation needed to be corrected by linear regression. Hence, the experiment-basic equation would be easier operated and calculate a more similar evaporation value.
In short, this research used experiment-basic equation to develop an easy way to operate the expanded system. If used the device of the numbers of each parts of expanded system in this research and in the controlling of environmental temperature and relative humidity, the operator only need to make sure the salty water flows to the next part completely.
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