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Study on the Experiment About Preparing Composite CLO2 and Dealing with Industrial Circulating Cooling Water

Author: ZhangPan
Tutor: LuXiuGuo
School: East China Jiaotong University
Course: Environmental Engineering
Keywords: Chlorine dioxide Solid preparations Industrial cooling water The number of bacteria Turbidity Influencing factors
CLC: TQ085.4
Type: Master's thesis
Year: 2011
Downloads: 29
Quote: 0
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Abstract


This paper is the use of new methods to study the ClO 2 Preparation, determine the best solid preparations ratio, the influencing factors of ClO 2 yield determine the optimal experimental conditions, and then apply the best ratio of solid preparation for industrial cooling water treatment research to determine the optimal dosage and experimental conditions, the conditions of these experiments and orthogonal experiment to determine the primary and secondary relationship determine the best combination of experimental conditions. The experimental results show that: the number of bacteria and turbidity removal of the solid preparation of the chlorine dioxide for the simulated industrial circulating cooling water is effective. First, the solid preparation of ClO 2 yield for inspection, mainly on the type of acidulant, the solid preparation of an integral part of the ratio and dosage, the release of water, the release time, stripping time, the reaction temperature , catalyst and experimental conditions such as ClO 2 yield. Experimental results show that: When acidulants as ferric sulfate, ferric sulfate and sodium chlorite in an amount of 0.7g, and release of water, 160mL, the reaction temperature was 70 ° C, the release time of 8min, the stripping time for 12min, the catalyst chloro aluminum under conditions of an amount of 1.5g of the the ClO 2 yield can reach 66%. ClO 2 yield influencing factors significant value not very different. Then, the application of the above to get the best ratio of solid preparation for industrial circulating cooling water treatment. Mainly on the experimental conditions, including the reaction temperature, stirring speed, pH, and mixing time, through the single factor experiment to determine the best conditions in the single factor experiment and by the number of bacteria in the removal rate and turbidity removal project to for detection. Experimental study showed that: the reaction temperature was 40 ° C, the stirring speed is 70r/min, pH value of 5 and the mixing time was 10min under the conditions, the best yield of 42.64% can be achieved. Finally, by orthogonal experiments of various factors in the water treatment significantly visits, determine each significant primary and secondary sexual, and then determine the best combination of conditions, and to examine the conditions under bacterial removal rate and turbidity removal. Experimental results: pH of the significance value of the maximum was 0.512, followed by the reaction temperature, its significant resistance value of 0.706, followed by the mixing time and the stirring speed, and the significant values ??were 0.710 and 0.744. In univariate analysis, the pH value of 6, the mixing time of 20 min, the reaction temperature is 35 ° C, stirring speed 60r/min experimental effect has been the best. Orthogonal analysis of experimental conditions, the comparison can be drawn, A1B2C1D4 conditions, i.e. the mixing time of 10min, the temperature was 25 ° C, pH 5, and the stirring speed is 90r/min conditions, sterilization rate can reach 100% turbidity removal rate can reach 94%.

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CLC: > Industrial Technology > Chemical Industry > General issues > Chemical plant > Industrial water,water treatment > Water treatment
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